endothelial cell chemotaxis to fibroblast growth factor

The directed movement of an endothelial cell in response to the presence of fibroblast growth factor (FGF).


box C/D RNA 3'-end processing

biolink:BiologicalProcess biolink:BiologicalProcessOrActivity biolink:BiologicalEntity biolink:NamedThing biolink:Entity biolink:Occurrent biolink:OntologyClass biolink:ThingWithTaxon biolink:PhysicalEssenceOrOccurrent

Any process involved in forming the mature 3' end of a box C/D RNA molecule.


prostaglandin production involved in inflammatory response

The synthesis or release of any prostaglandin following a stimulus as part of an inflammatory response, resulting in an increase in its intracellular or extracellular levels.


D-xylose 1-dehydrogenase (NADP+) activity

biolink:MolecularActivity biolink:BiologicalProcessOrActivity biolink:BiologicalEntity biolink:NamedThing biolink:Entity biolink:Occurrent biolink:OntologyClass biolink:ThingWithTaxon biolink:PhysicalEssenceOrOccurrent

Catalysis of the reaction: D-xylose + NADP+ = D-xylono-1,5-lactone + H+ + NADPH.


regulation of glial cell differentiation

Any process that modulates the frequency, rate or extent of glia cell differentiation.


Catalysis of the reaction: L-seryl-[protein] + NAD+ = H+ + nicotinamide + O-(ADP-D-ribosyl)-L-seryl-[protein].


Catalysis of the reaction: (1->6)-alpha-D-mannosyloligosaccharide + beta-D-mannosylphosphodecaprenol = (1->6)-alpha-D-mannosyl-(1->6)-alpha-D-mannosyl-oligosaccharide + decaprenol phosphate.


negative regulation of cell motility involved in cerebral cortex radial glia guided migration

The intracellular signaling pathway that results in the cessation of cell movement involved in lamination of the cerebral cortex.


regulation of oligopeptide transport

Any process that modulates the frequency, rate or extent of the directed movement of oligopeptides into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore. Oligopeptides are molecules that contain a small number (2 to 20) of amino-acid residues connected by peptide linkages.


green leaf volatile biosynthetic process

The chemical reactions and pathways resulting in the formation of volatile molecules emitted from green plants, such as hexenal, hexenol and hexenyl acetate, from linoleic acid or linolenic acid.


negative regulation of lens fiber cell differentiation

Any process that stops, prevents or reduces the frequency, rate or extent of lens fiber cell differentiation.


negative regulation of nodal signaling pathway involved in determination of lateral mesoderm left/right asymmetry

Any process that stops, prevents or reduces the frequency, rate or extent of a nodal signaling pathway, where the nodal signaling pathway is involved in determination of left/right asymmetry in the lateral mesoderm.


2-methylguanosine metabolic process

The chemical reactions and pathways involving 2-methylguanosine.


phenylacetaldehyde synthase activity

Catalyzes the reaction: L-phenylalanine + O2 + H2O -> phenylacetaldehyde + ammonia + hydrogen peroxide + CO2.


apoptotic process involved in mammary gland involution

Any apoptotic process that triggers the activity of proteolytic caspases whose actions dismantle the mammary epithelial cells resulting in their programmed cell death.


protoperithecium formation

The process of producing fruiting body precursors, called protoperithecia. Protoperitheicium is a spherical structure that is formed in the sexual phase of ascomycetous fungi such as Neurospora crassa and Sordaria macrospora. Protoperithecium is formed by the enveloping of ascogonia cells by sterile hyphae and it develops into perithecium.


Notch signaling pathway involved in arterial endothelial cell fate commitment

biolink:Pathway biolink:BiologicalProcess biolink:BiologicalProcessOrActivity biolink:BiologicalEntity biolink:NamedThing biolink:Entity biolink:OntologyClass biolink:Occurrent biolink:ThingWithTaxon biolink:PhysicalEssenceOrOccurrent

The series of molecular signals initiated by binding of an extracellular ligand to a Notch receptor on the surface of the target cell and contributing to the commitment of a cell to an arterial endothelial cell fate.


molybdenum incorporation via L-cysteinyl molybdopterin

The incorporation of molybdenum into a protein via L-cysteinyl molybdopterin.


Catalysis of the reaction: 1-18:3-2-16:0-phosphatidylglycerol + O2 + a reduced electron acceptor <=> 1-18:3-2-trans-16:1-phosphatidylglycerol + 2 H2O + an oxidized electron acceptor.


UDP-glucose 4,6-dehydratase activity

Catalysis of the reaction: UDP-D-glucose = H2O + UDP-4-dehydro-6-deoxy-D-glucose.


Catalysis of the reaction: N(4)-(beta-N-acetyl-D-glucosaminyl)-L-asparagine + H2O = N-acetyl-D-glucosamine + L-asparagine.


establishment of protein localization to plasma membrane

The directed movement of a protein to a specific location in a plasma membrane.


trihydroxyferuloyl spermidine:S-adenosyl-L-methionine O-methyltransferase activity

Catalysis of the transfer of a methyl group from S-adenosyl-L-methionine to the oxygen atom of a trihydroxyferuloyl spermidine molecule.


beta-1,3-galactosyltransferase activity

Catalysis of the transfer of a galactose residue from a donor molecule to an oligosaccharide, forming a beta-1,3-linkage.


positive regulation of T cell differentiation in thymus

Any process that activates or increases the frequency, rate or extent of T cell differentiation in the thymus.


histoblast morphogenesis

The process in which the anatomical structures derived from the histoblast disc are generated and organized. This includes the transformation of histoblast cells into adult structures during pupal metamorphosis. Histoblast cells are cells founded in the embryo that are the progenitors to the adult abdomen.


response to redox state

Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a stimulus indicating redox state. Redox state refers to the balance of oxidized versus reduced forms of electron donors and acceptors in an organelle, cell or organ; plastoquinone, glutathione (GSH/GSSG), and nicotinamide nucleotides (NAD+/NADH and NADP+/NADPH) are among the most important.


positive regulation of fat cell proliferation

Any process that activates or increases the rate or extent of fat cell proliferation.


oxidoreductase activity, acting on other nitrogenous compounds as donors

Catalysis of an oxidation-reduction (redox) reaction in which a nitrogenous group, excluding NH and NH2 groups, acts as a hydrogen or electron donor and reduces a hydrogen or electron acceptor.


anaerobic respiration

The enzymatic release of energy from inorganic and organic compounds (especially carbohydrates and fats) which uses compounds other than oxygen (e.g. nitrate, sulfate) as the terminal electron acceptor.


mono-butyltin dioxygenase activity

Catalysis of the reaction: butyltin + O2 + 2 H+ + 2 e- = H2O + beta-hydroxybutyltin.


mesenchyme migration

The process in which the population of cells that make up a mesenchyme undergo directed movement.


positive regulation of erythrocyte clearance

Any process that activates or increases the frequency, rate, or extent of erythrocyte clearance.


renal system pattern specification

Any developmental process that results in the creation of defined areas or spaces within an organism to which cells respond and eventually are instructed to differentiate into the anatomical structures of the renal system.


embryonic heart tube morphogenesis

The process in which the anatomical structures of the embryonic heart tube are generated and organized. The embryonic heart tube is an epithelial tube that will give rise to the mature heart.


isopentenyl diphosphate biosynthetic process

The chemical reactions and pathways resulting in the formation of isopentenyl diphosphate, an isomer of dimethylallyl diphosphate and the key precursor of all isoprenoids.


2,3-dimethylmalate lyase activity

Catalysis of the reaction: (2R,3S)-2,3-dimethylmalate = propanoate + pyruvate.


lysine biosynthetic process via diaminopimelate, dehydrogenase pathway

The chemical reactions and pathways resulting in the formation of lysine, via the intermediate diaminopimelate; in this pathway tetrahydrodipicolinate is converted to meso-diaminopimelate in a single enzymatic step.


voltage-gated sodium channel activity involved in cardiac muscle cell action potential

Enables the transmembrane transfer of a sodium ion by a voltage-gated channel through the plasma membrane of a cardiac muscle cell contributing to the depolarization phase of an action potential. A voltage-gated channel is a channel whose open state is dependent on the voltage across the membrane in which it is embedded.


positive regulation of cholesterol transport

Any process that activates or increases the frequency, rate or extent of the directed movement of cholesterol into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.


Catalysis of the reaction: NAD(P)+ + L-serine = nicotinamide + N2-(ADP-D-ribosyl)-L-serine.


negative regulation of pole plasm oskar mRNA localization

Any process that stops, prevents, or reduces the frequency, rate or extent of a process in which oskar mRNA is transported to, or maintained in, the oocyte pole plasm.


response to peptidoglycan

Any process that results in a change in state or activity of an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a peptidoglycan stimulus. Peptidoglycan is a bacterial cell wall macromolecule.


virus receptor activity

Combining with a virus component and mediating entry of the virus into the cell.


positive regulation of maltohexaose transport

Any process that activates or increases the frequency, rate or extent of maltohexaose transport.


negative regulation of ATP-dependent activity

Any process that stops or reduces the rate of an ATP-dependent activity.


regulation of mitotic telomere tethering at nuclear periphery

Any process that modulates the frequency, rate or extent of mitotic telomere tethering at nuclear periphery.


actin filament bundle retrograde transport

A process of actin filament bundle distribution that results in the arrangement of actin filament bundles from the periphery toward the interior of the cell.


fibroblast chemotaxis

The directed movement of a fibroblast guided by a specific chemical concentration gradient. Movement may be towards a higher concentration (positive chemotaxis) or towards a lower concentration (negative chemotaxis).


G protein-coupled purinergic nucleotide receptor activity

Combining with a purine nucleotide and transmitting the signal across the membrane by activating an associated G-protein; promotes the exchange of GDP for GTP on the alpha subunit of a heterotrimeric G-protein complex.


NADP binding

Binding to nicotinamide-adenine dinucleotide phosphate, a coenzyme involved in many redox and biosynthetic reactions; binding may be to either the oxidized form, NADP+, or the reduced form, NADPH.


[heparan sulfate]-glucosamine N-sulfotransferase activity

Catalysis of the reaction: 3'-phosphoadenylyl sulfate + [heparan sulfate]-glucosamine = adenosine 3',5'-bisphosphate + [heparan sulfate]-N-sulfoglucosamine.


tRNA wobble base modification

The process in which the nucleotide at position 34 in the anticodon of a tRNA is post-transcriptionally modified.


L-kynurenine catabolic process

The chemical reactions and pathways resulting in the breakdown of L-kynurenine, the L-enantiomer of the amino acid kynurenine (3-(2-aminobenzoyl)-alanine).


flavin-dependent halogenase activity

Catalysis of the reaction: R-CH + a halogen + FADH2 + O2 = R-C-halogen + FAD + H2O.


oleate transmembrane transporter activity

Enables the transfer of oleate from one side of a membrane to the other.


Catalysis of the reaction: CMP-N-acetylneuraminate + glycano-(1->3)-(N-acetyl-alpha-D-galactosaminyl)-glycoprotein = CMP + glycano-[(2->6)-alpha-N-acetylneuraminyl]-(N-acetyl-D-galactosaminyl)-glycoprotein.


positive regulation of lactation by mesenchymal-epithelial cell signaling

The process that increases the rate, frequency, or extent of lactation as a result of the secretion of a signal from the mammary fat and its reception by a mammary epithelial cell.


positive regulation of SREBP signaling pathway in response to decreased oxygen levels

Any process that activates or increases the frequency, rate or extent of the SREBP signaling pathway in response to a decrease in oxygen levels.


delamination involved in gastrulation with mouth forming second

The splitting or migration of one epithelial sheet into two involved in the process of deuterostomic gastrulation.


procyclogenesis

The morphological, biochemical and genetic changes that induce the differentiation of bloodstream form trypomastigotes into procyclic trypomastigotes in some of the Trypanosomatidae species such as Trypanosoma brucei. This process occurs inside the midgut of the tsetse fly vectors in T. brucei.


fibroblast growth factor receptor signaling pathway involved in spinal cord anterior/posterior pattern formation

The series of molecular signals generated as a consequence of a fibroblast growth factor receptor binding to one of its physiological ligands that results in the spatial identity of regions along the anterior-posterior axis of the spinal cord.


cytochrome P450 dependent beta-amyrin 12,13beta-epoxidase activity

Catalysis of the reaction: beta-amyrin + O2 + H+ + NAD(P)H <=> 12,13beta-epoxy-beta-amyrin + H2O + NAD(P).


peptidyl-proline hydroxylation

The hydroxylation of peptidyl-proline to form peptidyl-hydroxyproline.


positive regulation of sensory perception of bitter taste

Any process that activates or increases the frequency, rate or extent of sensory perception of bitter taste.


mannosamine biosynthetic process

The chemical reactions and pathways resulting in the formation of mannosomine, 2-amino-2-deoxymannose; the D-isomer is a constituent of neuraminic acids as well as mucolipids and mucoproteins.


acetylornithine deacetylase activity

Catalysis of the reaction: N2-acetyl-L-ornithine + H2O = acetate + L-ornithine.


small RNA binding translational repressor activity

A translational repressor activity that binds to a single-stranded small regulatory RNA (either a miRNA or a siRNA) to guide it to its target mRNA.


wobble position uridine ribose methylation

The process in which the ribose of uridine at position 34 in the anticodon of a tRNA is post-transcriptionally methylated at the 2'-O position.


histone H2A methyltransferase activity

Catalysis of the reaction: S-adenosyl-L-methionine + a histone H2 = S-adenosyl-L-homocysteine + a methylated histone H2A. Histone methylation generally occurs on either an arginine or a lysine residue.


N-glutamylanilide hydrolase activity

Catalysis of the reaction: N5-phenyl-L-glutamine + H2O = L-glutamate + aniline + H+.


positive regulation of colon smooth muscle contraction

Any process that activates or increases the frequency, rate or extent of colon smooth muscle contraction.


kaempferol O-glucoside biosynthetic process

The chemical reactions and pathways leading to the formation of O-glucosylated derivatives of kaempferol.


The series of molecular signals initiated by thrombopoietin binding to its receptor on the surface of a target cell, and ending with the regulation of a downstream cellular process, e.g. transcription.


omega-6 fatty acid desaturase activity

Catalysis of the introduction of an omega-6 double bond into the fatty acid hydrocarbon chain.


renal capsule morphogenesis

The process in which the anatomical structures of the renal capsule are generated and organized. The renal capsule is the tough fibrous layer surrounding the kidney, covered in a thick layer of perinephric adipose tissue. It provides some protection from trauma and damage. During development, it comprises a single layer of flattened cells that lie just above the cortical stroma and the condensed mesenchyme of the nephrogenic zone. It is in this region that the early stages of nephron induction and formation of new generations ureteric bud branches occur, as the kidney expands.


protein urmylation

Covalent attachment of the ubiquitin-like protein URM1 to another protein.


lobar bronchus mesenchyme development

The biological process whose specific outcome is the progression of a lobar bronchus mesenchyme from an initial condition to its mature state. This process begins with the formation of the lobar bronchus mesenchyme and ends with the mature structure. The lobar bronchus mesenchyme is the mass of tissue composed of mesenchymal cells in the lobar bronchus.


alpha1-adrenergic receptor activity

Combining with epinephrine or norepinephrine to initiate a change in cell activity via activation of a G protein, with pharmacological characteristics of alpha1-adrenergic receptors; the activity involves transmitting the signal to the Gq alpha subunit of a heterotrimeric G protein.


amylase activity

Catalysis of the hydrolysis of amylose or an amylose derivative.


(25S)-Delta(7)-dafachronate binding

Binding to (25S)-Delta(7)-dafachronate.


Catalysis of the reaction: 2-oxo-7-methylthioheptanoate + acetyl-CoA + H2O <=> H+ + 2-(5'-methylthio)pentylmalate + coenzyme A.


synaptic transmission, GABAergic

The vesicular release of gamma-aminobutyric acid (GABA). from a presynapse, across a chemical synapse, the subsequent activation of GABA receptors at the postsynapse of a target cell (neuron, muscle, or secretory cell) and the effects of this activation on the postsynaptic membrane potential and ionic composition of the postsynaptic cytosol. This process encompasses both spontaneous and evoked release of neurotransmitter and all parts of synaptic vesicle exocytosis. Evoked transmission starts with the arrival of an action potential at the presynapse.


regulation of DNA topoisomerase (ATP-hydrolyzing) activity

Any process that modulates the frequency, rate or extent of DNA topoisomerase (ATP-hydrolyzing) activity.


negative regulation of osteoblast differentiation

Any process that stops, prevents, or reduces the frequency, rate or extent of osteoblast differentiation.


NAD+ synthase activity

Catalysis of the reaction: ATP + deamido-NAD+ + NH3 = AMP + diphosphate + NAD+.


negative regulation of response to acetate

Any process that stops, prevents or reduces the frequency, rate or extent of response to acetate.


stomatal complex development

The process whose specific outcome is the progression of the stomatal complex over time from its formation to the mature structure. The stomatal complex is the stomatal guard cells and their associated epidermal cells.


antisense RNA metabolic process

The chemical reactions and pathways involving antisense RNA, an RNA molecule complementary in sequence to another RNA or DNA molecule, which, by binding the latter, acts to inhibit its function and/or completion of synthesis.


regulation of endothelial tube morphogenesis

Any process that modulates the frequency, rate or extent of endothelial tube morphogenesis.


menaquinone-dependent protoporphyrinogen oxidase activity

Catalysis of the reaction: protoporphyrinogen IX + menaquinone = protoporphyrin IX + reduced menaquinone.


olfactory nerve structural organization

The process that contributes to the act of creating the structural organization of the oculomotor nerve. This process pertains to the physical shaping of a rudimentary structure. The olfactory nerve is a collection of sensory nerve rootlets that extend down from the olfactory bulb to the olfactory mucosa of the upper parts of the nasal cavity. This nerve conducts odor information to the brainstem.


corticospinal neuron axon guidance

The process in which the migration of an axon growth cone of a neuron that is part of the corticospinal tract is directed from the cerebral cortex layer V to the spinal cord dorsal funiculus in response to a combination of attractive and repulsive cues.


pentose catabolic process to acetate

The chemical reactions and pathways resulting in the breakdown of pentose to acetate.


regulation of retinal cone cell fate specification

Any process that mediates the specification of a cell into a retinal cone cell.


monocarboxylic acid binding

Binding to a monocarboxylic acid, any organic acid containing one carboxyl (COOH) group or anion (COO-).


regulation of neuronal action potential

Any process that modulates the frequency, rate or extent of action potential creation, propagation or termination in a neuron. This typically occurs via modulation of the activity or expression of voltage-gated ion channels.


leptin receptor activity

Combining with the fat-cell specific hormone leptin and transmitting the signal from one side of the membrane to the other to initiate a change in cell activity.


20-hydroxy-leukotriene B4 omega oxidase activity

Catalysis of the reaction: 20-hydroxy-leukotriene B4 + O2 + reduced [NADPH-hemoprotein reductase] = 20-oxo-leukotriene B4 + H+ + 2 H2O + oxidized [NADPH-hemoprotein reductase].


tergite morphogenesis

The process in which the anatomical structures of the tergite are generated and organized. The tergite is the primary plate or sclerite forming the dorsal surface of any insect body segment.


chromosome, subtelomeric region

biolink:CellularComponent biolink:AnatomicalEntity biolink:OrganismalEntity biolink:BiologicalEntity biolink:NamedThing biolink:Entity biolink:PhysicalEssence biolink:SubjectOfInvestigation biolink:ThingWithTaxon biolink:PhysicalEssenceOrOccurrent

A region of the chromosome, adjacent to the telomere (on the centromeric side) that contains repetitive DNA and sometimes genes. This region is usually heterochromatin.


polytene chromosome puff

A swelling at a site along the length of a polytene chromosome, thought to be the site of active transcription.


chromosome, telomeric repeat region

A complex of DNA and protein that seals the end of a chromosome. The telomeric repeat DNA consists of simple tandemly repeated sequences specific for each species. Typically one strand is G-rich and the other C-rich. The G-rich strand forms a 3'-terminal overhang, the length of which varies with species. The single strand overhang is bound by a variety of proteins, including telomere capping proteins that bind to the single-stranded DNA and seal the telomeric loop.


polytene chromosome band

A stretch of densely packed chromatin along the polytene chromosome, visible as a morphologically distinct band.


polytene chromosome interband

A stretch of less tightly packed chromatin along the polytene chromosome, found between bands.


chromosome, centromeric core domain

The innermost portion of the centromeric region of a chromosome, encompassing the core region of a chromosome centromere and the proteins that bind to it.


DNA topoisomerase III-beta-TDRD3 complex

A protein complex that has DNA topoisomerase type I and RNA topoisomerase activities.


host bacteroid-containing symbiosome

A symbiosome containing any of various structurally modified bacteria, such as those occurring on the root nodules of leguminous plants, of a host cell.


growth hormone receptor complex

A receptor complex that consists of two identical subunits and binds growth hormone.


APC-tubulin-IQGAP1 complex

A protein complex that contains the tumor suppressor protein adenomatous polyposis coli (APC), alpha-tubulin, gamma-tubulin, and the Rac1 and Cdc42 effector IQGAP1; may play a role in cytoskeleton organization.


simple sieve plate

A sieve plate that contains a single specialized sieve area.


sieve plate

A part of the cell wall of a sieve tube member that bears one or more highly specialized sieve areas.


compound sieve plate

A sieve plate that contains several specialized sieve areas in either a scalariform or reticulate arrangement.


Cdc48p-Npl4p-Vms1p AAA ATPase complex

A multiprotein ATPase complex involved in the release of polyubiquitinated proteins, including those damaged by oxidative stress, from the outer mitochondria membrane into the cytoplasm where they are presented to the proteasome for proteolysis, a process also referred to as mitochondria-associated degradation (MAD). In budding yeast, this complex includes Cdc48p, Npl4p and Vms1p.


mRNA cleavage stimulating factor complex

A protein complex required for mRNA cleavage but not for poly(A) addition.


meiotic nuclear membrane microtubule tethering complex

A nuclear membrane protein complex which connects the nuclear outer and inner membranes together, and links links the nuclear lumen to cytoplasmic microtubules during meiosis.


Sad1-Kms1 LINC complex

A LINC complex implicated in the connection of DNA double strand breaks to the cytoskeleton during DNA double-strand break repair.


interleukin-15 receptor complex

A protein complex that binds interleukin-15 (IL-15) and that consists of, at a minimum, an interleukin, an alpha, beta and gamma chain as well as optional additional kinase subunits. The alpha chain is unique to binds IL-15 while it shares the beta chain with the IL-2 receptor and the cytokine receptor common gamma chain with multiple interleukin receptors.


alpha-D-ribose 1-methylphosphonate 5-triphosphate synthase complex

A catalytic protein complex that is capable of alpha-D-ribose 1-methylphosphonate 5-triphosphate synthase activity.


cytoproct

Stable, specialized structure for extrusion of waste by the cell into the surrounding medium.


activin A complex

A nonsteroidal regulator, composed of two covalently linked inhibin beta-A subunits (sometimes known as activin beta-A or activin/inhibin beta-A).


activin complex

A nonsteroidal regulator, composed of two covalently linked inhibin beta subunits, inhibin beta-A and inhibin beta-B (sometimes known as activin beta or activin/inhibin beta). There are three forms of activin complex, activin A, which is composed of 2 inhibin beta-A subunits, activin B, which is composed of 2 inhibin beta-B subunits, and activin AB, which is composed of an inhibin beta-A and an inhibin beta-B subunit.


activin AB complex

A nonsteroidal regulator, composed of two covalently linked inhibin beta subunits (sometimes known as activin beta or activin/inhibin beta), inhibin beta-A and inhibin beta-B.


activin B complex

A nonsteroidal regulator, composed of two covalently linked inhibin beta-B subunits (sometimes known as activin beta-B or activin/inhibin beta-B).


hippocampal mossy fiber expansion

Synaptic expansion of hippocampal mossy fiber axon that makes contact with the thorny excrescences of hippocampal CA3 pyramidal cell dendrites.


alphaV-beta3 integrin-tissue transglutaminase complex

A protein complex that consists of an alphaV-beta3 integrin complex bound to tissue transglutaminase.


vacuole-isolation membrane contact site

An organelle membrane contact site formed at the junction of the vacuolar membrane and the isolation membrane or phagophore in response to starvation or other stresses, leading to the formation of the autophagosome.


endoplasmic reticulum-endosome membrane contact site

A contact site between the endoplasmic reticulum membrane and the endosome membrane.


endoplasmic reticulum-vacuole membrane contact site

A zone of apposition between endoplasmic-reticulum and lytic vacuole membranes, structured by bridging complexes.


vacuole-mitochondrion membrane contact site

A zone of apposition between the vacuolar membrane and the mitochondrial outer membrane, important for transfer of lipids between the two organelles.


mitochondrial crista junction

A tubular structure of relatively uniform size that connects a mitochondrial crista to the mitochondrial inner boundary membrane.


mitochondrial inner-outer membrane contact site

Sites of close apposition of the inner and outer mitochondrial membrane.


nucleus-vacuole junction

An organelle membrane contact site formed between the vacuole membrane and the outer nuclear membrane. In S. cerevisiae these contacts are mediated through direct physical interaction between Vac8p and Nvj1p.


endoplasmic reticulum-plasma membrane contact site

A contact site between the endoplasmic reticulum membrane and the plasma membrane, structured by bridging complexes.


mitochondria-associated endoplasmic reticulum membrane

A zone of apposition between endoplasmic-reticulum and mitochondrial membranes, structured by bridging complexes. These contact sites are thought to facilitate inter-organelle calcium and phospholipid exchange.


Z granule

A small cytoplasmic, non-membranous RNA/protein complex aggregate in the primordial germ cells that are distinct from, but colocalize with or are adjacent to, P granules and mutator foci and are associated with RNA metabolism. Z granules have been observed in C. elegans.


pi-body

A P granule that contains the PIWIL2-TDRD1 module, a set of proteins that act in the primary piRNA pathway. The pi-body corresponds to the cementing material between mitochondria found in gonocytes.


TIS granule

A ribonucleoprotein granule located in the cytoplasm that is formed by the RNA-binding protein TIS11B and RNA molecules, enriched in membrane protein-encoding mRNAs with multiple AU-rich elements. TIS granules are reticular meshworks intertwined with the endoplasmic reticulum (ER).


GW body

A ribonucleoprotein granule located in the cytoplasm and the nucleus. GW-bodies minimally contain the Argonaute2 (Ago2) and TNRC6B proteins, together with specific target RNAs.


piP-body

A P granule that contains the PIWIL4-TDRD9 module, a set of proteins that act in the secondary piRNA pathway.


RNP body

A ribonucleoprotein granule located in the cytoplasm of bacteria, minimally containing the RNase E protein and RNA molecules. Bacterial RNP-bodies are similar to eukaryotic P-bodies and stress granules.


nuclear stress granule

A dense aggregation in the nucleus composed of proteins and RNAs that appear when the cell is under stress.


chromatoid body

A ribonucleoprotein complex found in the cytoplasm of male germ cells, composed of exceedingly thin filaments that are consolidated into a compact mass or into dense strands of varying thickness that branch to form an irregular network. Contains mRNAs, miRNAs, and protein components involved in miRNA processing (such as Argonaute proteins and the endonuclease Dicer) and in RNA decay (such as the decapping enzyme DCP1a and GW182).


neuronal ribonucleoprotein granule

A ribonucleoprotein complex that is found in the cytoplasm of axons and dendrites, and transports translationally silenced mRNAs to dendritic synapses, where they are released and translated in response to specific exogenous stimuli.


TRC complex

A protein complex found in yeast that contains GET4, MDY2 (GET5), SGT2, and at least two heat shock proteins, HSP104 and YBR137W. The TRC complex transfers tail-anchored (TA) proteins to GET3 for targeting to the endoplasmic reticulum membrane.


pre-snoRNP complex

A ribonucleoprotein complex that contains a precursor small nucleolar RNA (pre-snoRNA) and associated proteins, and forms during small nucleolar ribonucleoprotein complex (snoRNP) assembly. Pre-snoRNP complexes may contain proteins not found in the corresponding mature snoRNP complexes.


cytoplasmic DNA replication factor C complex

A cytoplasmic complex of two polypeptides that loads the DNA polymerase processivity factor proliferating cell nuclear antigen (PCNA) onto DNA, thereby permitting processive DNA synthesis catalyzed by DNA polymerase. Examples of this component are found in prokaryotic species.


DNA replication factor C complex

A complex that loads the DNA polymerase processivity factor proliferating cell nuclear antigen (PCNA) onto DNA, thereby permitting processive DNA synthesis catalyzed by DNA polymerase. In eukaryotes the complex consists of five polypeptides.


nuclear DNA replication factor C complex

A nuclear complex of five polypeptides that loads the DNA polymerase processivity factor proliferating cell nuclear antigen (PCNA) onto DNA, thereby permitting processive DNA synthesis catalyzed by DNA polymerase delta or epsilon. In Saccharomyces and several other species, the subunits are known as Rfc1p-Rfc5p, although subunit names do not necessarily correspond between different species.


DNA polymerase III, beta sliding clamp processivity factor complex

A subcomplex of the DNA polymerase III holoenzyme which is responsible for tethering the catalytic subunit of DNA polymerase to DNA during high-speed replication. The complex is homodimeric in prokaryotes, and homotrimeric in other species.


HU-DNA complex

A protein-DNA complex that consists of HU heterodimers (an alpha and a beta chain) assembled into octamers along DNA. HU binds to double-stranded DNA in a structure- and sequence-specific manner and bends the DNA into a nucleosome-like structure.


DNA bending complex

A protein-DNA complex that contains DNA in combination with a protein which binds to and bends DNA. Often plays a role in DNA compaction.


H-NS complex

A multimer of H-NS proteins that is involved in bacterial nucleoid condensation and negative regulation of global gene expression by directly binding to promoter regions. Recognizes both structural and sequence-specific motifs in double-stranded DNA and has binding preference for bent DNA.


IHF-DNA complex

A protein-DNA complex containing IHF heterodimers (an alpha and a beta chain) bound to DNA. IHF binds to double-stranded DNA in a structure- and sequence-specific manner and bends the DNA into a nucleosome-like structure, the bacterial nucleoid.


viral occlusion body

A crystalline protein matrix surrounding the nucleocapsids of some insect viruses after their release in the environment. Produced in the host cell, the occlusion body protects the infectious virion after death of the host.


extrinsic component of phagophore assembly site membrane

The component of the phagophore assembly site membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region.


extrinsic component of organelle membrane

The component of an organelle membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region.


extrinsic component of postsynaptic early endosome membrane

The component of the postsynaptic early endosome membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region.


extrinsic component of intraperoxisomal membrane

The component of the intraperoxisomal membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region.


extrinsic component of postsynaptic recycling endosome membrane

The component of the postsynaptic recycling endosome membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region.


extrinsic component of nuclear outer membrane

The component of a nuclear outer membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region.


extrinsic component of synaptic vesicle membrane

The component of the synaptic vesicle membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region.


extrinsic component of plastid thylakoid membrane

The component of a plastid thylakoid membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region.


extrinsic component of plastid membrane

The component of a plastid membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region.


extrinsic component of stromal side of plastid thylakoid membrane

The component of a plastid thylakoid membrane consisting of gene products and protein complexes that are loosely bound to its stromal surface, but not integrated into the hydrophobic region.


extrinsic component of neuronal dense core vesicle membrane

The component of the neuronal dense core vesicle membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region.


extrinsic component of plastid inner membrane

The component of a plastid inner membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region.


extrinsic component of presynaptic endosome membrane

The component of the presynaptic endosome membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region.


extrinsic component of omegasome membrane

The component of the omegasome membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region.


extrinsic component of mitochondrial outer membrane

The component of a mitochondrial outer membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region.


extrinsic component of postsynaptic endosome membrane

The component of the postsynaptic endosome membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region.


extrinsic component of Golgi membrane

The component of a Golgi membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region.


extrinsic component of lumenal side of plastid thylakoid membrane

The component of a plastid thylakoid membrane consisting of gene products and protein complexes that are loosely bound to its lumenal surface, but not integrated into the hydrophobic region.


extrinsic component of mitochondrial inner membrane

The component of mitochondrial inner membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region.


extrinsic component of stromal side of plastid inner membrane

The component of a plastid inner membrane consisting of gene products and protein complexes that are loosely bound to its stromal surface, but not integrated into the hydrophobic region.


extrinsic component of endosome membrane

The component of an endosome membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region.


extrinsic component of matrix side of mitochondrial inner membrane

The component of the matrix side of the mitochondrial inner membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region.


extrinsic component of endoplasmic reticulum membrane

The component of the endoplasmic reticulum membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region.


extrinsic component of dense core granule membrane

The component of the dense core granule membrane consisting of gene products and protein complexes that are loosely bound to one of its surfaces, but not integrated into the hydrophobic region.


protein C inhibitor-PLAT complex

A heterodimeric protein complex that contains protein C inhibitor (SERPINA5) and tissue-type plasminogen activator (PLAT); formation of the complex inhibits the serine protease activity of tissue-type plasminogen activator.


dolichyl-phosphate-mannose-protein mannosyltransferase Pmt1p-Pmt2p dimer complex

A protein dimer complex that possesses dolichyl-phosphate-mannose-protein mannosyltransferase activity and, in S. cerevisiae, is composed of Pmt1p-Pmt2p.


The region between the inner and outer lipid bilayers of the longitudinal sarcoplasmic reticulum envelope. The longitudinal sarcoplasmic reticulum lumen is continuous with the lumen contained within the terminal cisternae.


deuterosome

A spherical, electron dense, cytoplasmic structure that is involved in de novo assembly of centrioles.


transcription factor TFIIF complex

A general transcription initiation factor which in humans consists of a heterodimer of an alpha and a beta subunit. Helps recruit RNA polymerase II to the initiation complex and promotes translation elongation.


bacterial-type flagellum

A motor complex composed of an extracellular helical protein filament coupled to a rotary motor embedded in the cell envelope.


periplasmic flagellum

Flagellar filaments located in the periplasmic space; characterized in spirochetes, in which they are essential for shape and motility. Composed of a core surrounded by two sheath layers, the flagella rotate to allow migration of the cell through viscous media, which would not be possible using external flagella.


COPI-coated Golgi to ER transport vesicle

A vesicle that mediates transport from the Golgi to the endoplasmic reticulum.


chromoplast outer membrane

The outer, i.e. cytoplasm-facing, lipid bilayer of the chromoplast envelope.


viral factory

An intracellular compartment in a host cell which increases the efficiency of viral replication, and shields the virus from host defenses. Viral factories can be either cytoplasmic or nuclear and often arise from extensive rearrangement of host cell cytoskeletal and/or cell membrane compartments.


double membrane vesicle viral factory

A cytoplasmic viral factory that consists of a double-membrane bound vesicle. Has a diameter of 200-300nm and is derived from the endoplasmic reticulum or Golgi apparatus. Produced by Picornaviridae, Nidovirales, Arteriviridae and Coronaviridae.


tube viral factory

A cytoplasmic viral factory derived from the Golgi in which Bunyaviridae replication takes place. Tubes are membranous structures close to the assembly and budding sites, and their function may be to connect viral replication and morphogenesis inside viral factories.


viroplasm viral factory

A cytoplasmic viral factory that is electron dense due to high levels of viral RNA. Produced by nucleo-cytoplasmic large DNA viruses (NCLDV) like Poxviridae, Asfarviridae and Iridoviridae, and dsRNA viruses like Reoviridae.


host cell viral assembly compartment

A membrane-bounded compartment that forms in the cytoplasm of the host cell, in which virus assembly takes place.


spherule viral factory

A cytoplasmic viral factory which is a 50-400nm diameter membrane invagination. Spherules can appear on several enveloped cellular components depending on the virus.


cytoplasmic viral factory

A viral factory located in the cytoplasm of a host cell.


phosphopyruvate hydratase complex

A multimeric enzyme complex, usually a dimer or an octamer, that catalyzes the conversion of 2-phospho-D-glycerate to phosphoenolpyruvate and water.


phosphoenolpyruvate-dependent sugar phosphotransferase complex

Includes phosphoenolpyruvate-protein phosphatase (enzyme I of the phosphotransferase system) and protein-N(PI)-phosphohistidine-sugar phosphotransferase (enzyme II of the phosphotransferase system).


cytoplasmic microtubule bundle

Any microtubule bundle that is part of a cytoplasm.


microtubule bundle

An arrangement of closely apposed microtubules running parallel to each other.


axon microtubule bundle

An arrangement of closely apposed microtubules running parallel to each other in the axon hillock and initial segment.


dynamic microtubule bundle

A microtubule bundle that undergoes changes in length, and in which microtubule sliding takes place.


static microtubule bundle

A microtubule bundle that has a constant length, and in which microtubule sliding does not take place.


Dsl1/NZR complex

A multisubunit tethering complex, i.e. a protein complex involved in mediating the initial interaction between vesicles and the membranes with which they fuse, that is involved in trafficking from the Golgi apparatus to the ER. In Saccharomyces cerevisiae the Dsl1p complex contains Dsl1p, Tip20p, and Sec39p.


Nbp35-Cfd1 ATPase complex

An iron-sulfur cluster assembly complex that is capable of weak ATPase activity. In yeast it consists of two subunits, Nbp35 and Cfd1.


iron-sulfur cluster assembly complex

A protein complex capable of assembling an iron-sulfur (Fe-S) cluster.


peri-centrosomal recycling endosome

A recycling endosome that is organized around the microtubule organizing center, close to the nucleus. This is the main recycling endosome of most cells. It receives input from the Golgi as well as recycled molecules from early endosomes.


A protein complex that consists of fibronectin bound to tissue transglutaminase, and is involved in cell adhesion.


intracellular ferritin complex

A ferritin complex located in the cell. Intracellular ferritin complexes contain 24 subunits, in a mixture of L (light) chains and H (heavy) chains.


amino acid transport complex

A heteromeric protein complex consisting of a multi-transmembrane spanning subunit (the light chain) and a type II glycoprotein subunit (the heavy chain) that functions to transport amino acids across a plasma membrane.


repressor ecdysone receptor complex

A protein complex consisting of a heterodimer of Ecdysone receptor (EcR) and ultraspiracle (usp) plus an associated corepressor such as SMRTER, which represses transcription of target genes.


cellular bud tip polarisome

Protein complex that has a role in determining cell polarity, found at the tip of a growing fungal bud.


radial spoke head 1

The portion of the radial spoke 1 that is orthogonal to the elongated stalk and which projects towards the central pair of microtubules within the ciliary axoneme.


radial spoke head

Protein complex forming portion of the radial spoke that is orthogonal to the elongated stalk and which projects towards the central pair of microtubules within the ciliary or flagellum axoneme.


radial spoke head 2

The portion of the radial spoke 2 that is orthogonal to the elongated stalk and which projects towards the central pair of microtubules within the ciliary axoneme.


radial spoke head 3

The portion of the radial spoke 3 that is orthogonal to the elongated stalk and which projects towards the central pair of microtubules within the ciliary axoneme.


mineralized avascular GAG-rich matrix

biolink:GrossAnatomicalStructure biolink:AnatomicalEntity biolink:OrganismalEntity biolink:BiologicalEntity biolink:NamedThing biolink:Entity biolink:PhysicalEssence biolink:SubjectOfInvestigation biolink:ThingWithTaxon biolink:PhysicalEssenceOrOccurrent

Avascular GAG-rich matrix that is mineralized.


avascular GAG-rich matrix

Proteinaceous extracellular matrix that is avascular and consists primarily of glycosaminoglycans.


non-mineralized avascular GAG-rich matrix

Avascular GAG-rich matrix that is not mineralized.


An enzyme complex composed of two catalytic alpha subunits, which form a catalytic dimer, and a non-catalytic, regulatory beta subunit; the catalytic dimer may be an alpha1/alpha1 or alpha2/alpha2 homodimer, or an alpha1/alpha2 heterodimer. Modulates the action of platelet-activating factor (PAF).


BLOC-3 complex

A protein complex required for the biogenesis of specialized organelles of the endosomal-lysosomal system, such as melanosomes and platelet dense granules. The human complex contains the Hps1 and Hps4 proteins.


BLOC complex

Any of several protein complexes required for the biogenesis of specialized organelles of the endosomal-lysosomal system, such as melanosomes, platelet dense granules, and other related organelles; acronym for biogenesis of lysosomal-related organelles complex.


BLOC-1 complex

A protein complex required for the biogenesis of specialized organelles of the endosomal-lysosomal system, such as melanosomes and platelet dense granules. Many of the protein subunits are conserved between mouse and human; the mouse complex contains the Pallidin, Muted, Cappuccino, Dysbindin, Snapin, BLOS1, BLOS2, AND BLOS3 proteins.


BLOC-2 complex

A protein complex required for the biogenesis of specialized organelles of the endosomal-lysosomal system, such as melanosomes and platelet dense granules. The human complex contains the Hps3, Hps5, and Hps6 proteins; the mouse complex contains ru2 and ru.


serine-tRNA ligase complex

A heterodimeric enzyme complex that catalyzes the ligation of serine to tRNA(Ser), forming L-seryl-tRNA(Ser).


Ycf2/FtsHi complex

A protein complex located in the chloroplast inner membrane and facing the stroma that is associated with the chloroplast inner membrane translocase complex and provides the ATPase motor activity to drive import of proteins into the chloroplast stroma.


lumenal side of smooth endoplasmic reticulum membrane

The side (leaflet) of the smooth endoplasmic reticulum membrane that faces the lumen.


lumenal side of endoplasmic reticulum membrane

The side (leaflet) of the plasma membrane that faces the lumen.


lumenal side of rough endoplasmic reticulum membrane

The side (leaflet) of the rough endoplasmic reticulum membrane that faces the lumen.


plasma membrane proton-transporting ATP synthase, stator stalk

One of two stalks that connect the catalytic core of the hydrogen-transporting ATP synthase to the plasma membrane-associated F0 proteins; is thought to prevent futile rotation of the catalytic core. Examples of this component are found in Bacterial species.


proton-transporting ATP synthase, stator stalk

One of two stalks that connect the catalytic core of the hydrogen-transporting ATP synthase to the membrane-associated Fo proteins; is thought to prevent futile rotation of the catalytic core.


mitochondrial proton-transporting ATP synthase, stator stalk

One of two stalks that connect the catalytic core of the hydrogen-transporting ATP synthase to the mitochondrial membrane-associated F0 proteins; is thought to prevent futile rotation of the catalytic core.


rhabdomere membrane

The portion of the plasma membrane surrounding the rhabdomere.


Tle3-Aes complex

A transcriptional repressor complex that consists of a heterodimer of the proteins Tle3 (also known as Grg3b) and Aes (Grg5), which are homologs of the Drosophila groucho gene product.


RNA polymerase II transcription repressor complex

A protein complex, located in the nucleus, that possesses activity that prevents or downregulates transcription from a RNA polymerase II promoter.


Cyc8(Ssn6)-Tup1 general repressor complex

A corepressor complex containing the WD-repeat protein Tup1p (S. cerevisiae) and Tup11/Tup12 (fission yeast) and the TPR repeat protein Cyc8p (S. cerevisiae) ssn6 (fission yeast) that is recruited to target genes by DNA-bound repressor proteins preferentially at regions where histones are deacetylated by the Clr6 class I HDAC, and recruits the SWI/SNF and SAGA complexes to promoters.


negative cofactor 2 complex

A heterodimeric protein complex that can stably associate with TATA-binding protein on promoters, thereby preventing the assembly of transcription factors TFIIA and TFIIB and leading to repression of RNA polymerase II transcription. The two subunits, NC2alpha (Drap1) and NC2beta (Dr1), dimerize through histone fold domains of the H2A/H2B type present in the amino termini.


DRM complex

A transcriptional repressor complex that contains the lin-9, lin-35, lin-37, lin-52, lin-53, lin-5is involved in 4-, dpl-1 and efl-1 proteins, and is involved in cell fate specification.


beta-catenin-ICAT complex

Transcription factor complex that inhibits binding of Tcf to beta-catenin while preserving interaction of catenin with cadherin thus inhibiting transcription mediated by beta-catenin-Tcf complex.


Mad-Max-mSin3A complex

A transcriptional repressor complex that contains a heterodimer of the bHLH-ZIP proteins Mad and Max, plus mSin3A, a homolog of the yeast Sin3p.


Mad-Max complex

A transcriptional repressor complex that consists of a heterodimer of the bHLH-ZIP proteins Mad and Max.


collagen and cuticulin-based cuticle extracellular matrix

A collagen and cuticulin-based noncellular, multilayered structure that is synthesized by an underlying ectodermal (hypodermal) cell layer. The cuticle serves essential functions in body morphology, locomotion, and environmental protection. An example of this component is found in Caenorhabditis elegans.


chitin-based extracellular matrix

Any constituent part of a chitin-based noncellular, hardened, or membranous extracellular matrix secreted from the apical surface of an epithelial sheet.


perineuronal net

A dense extracellular matrix (ECM) that forms around many neuronal cell bodies and dendrites late in development and is responsible for synaptic stabilization in the adult brain.


fertilization envelope

A structure that lies outside the plasma membrane and surrounds the egg. The fertilization envelope forms from the vitelline membrane after fertilization as a result of cortical granule release.


hyaline layer

A multilayered extraembryonic matrix that functions as a substrate for cell adhesion through early development. It is thought to protect and lubricate the embryo, stabilize the blastomeres during morphogenesis, and regulate nutrient intake. The major constituent of the hyaline layer is the protein hyalin. This matrix has been found in echinoderms.


fungal biofilm matrix

An extracellular matrix lying external to fungal cells. The fungal biofilm matrix consists of polysaccharides, proteins, lipids, and nucleic acids. Fungal biofilms mediate adherence to host tissues, and provide protection from host immune defenses.


biofilm matrix

A structure lying external to microbial cells. A biofilm is an aggregate of surface-associated cells, and the biofilm matrix is the envelope of polymeric substances that surrounds the cells.


egg coat

A specialized extracellular matrix that surrounds the plasma membrane of the ovum of animals. The egg coat provides structural support and can play an essential role in oogenesis, fertilization and early development.


bacterial biofilm matrix

A structure lying external to bacterial cells. A biofilm is an aggregate of surface-associated bacteria, and the biofilm matrix is the envelope of polymeric substances that surrounds the bacteria.


organomineral extracellular matrix

An extracellular matrix consisting of a densely packed organomineral assembly in which the mineral phase represents the majority of the material by weight.


perisynaptic extracellular matrix

The portion of the extracellular matrix that lies within the perisynaptic space.


synapse-associated extracellular matrix

The extracellular matrix of the perisynaptic space (the extracellular space adjacent to the synapse) and the synaptic cleft.


interstitial matrix

A type of extracellular matrix found in interstitial connective tissue, characterized by the presence of fibronectins, proteoglycans, and types I, III, V, VI, VII and XII collagens.


interphotoreceptor matrix

A specialized extracellularc matrix that surrounds the photoreceptors of the retina and lies between them and the apical surface of the retinal pigment epithelium. The IPM has been implicated in several important activities required for photoreceptor function and maintenance.


pollen coat

A layer of extracellular matrix deposited onto the surface of the pollen wall upon disintegration of the tapetal layer of the anther wall in the late stages of pollen development. The composition of this material is highly heterogeneous and includes waxes, lipid droplets, small aromatic molecules, and proteins. The pollen coat is proposed to have many functions, such as holding pollen in the anther until dispersal, facilitation of pollen dispersal, protection of pollen from water loss and UV radiation, and facilitation of adhesion of pollen to the stigma.


mineralized extracellular matrix

Extracellular matrix that is mineralized.


vitelline envelope

A glycoprotein-based structure that lies outside the plasma membrane and surrounds the egg before fertilization.


adhesive extracellular matrix

A extracellular matrix which attaches an organism to a substrate.


ATG2-ATG18 complex

A protein complex essential for autophagy during nutrient deprivation, a catabolic process that sequesters undesired cellular material into autophagosomes for delivery to lysosomes for degradation. Contributes to nutrition homeostasis and damage control in eukaryotic cells. Functions at a late step of autophagosome formation for efficient completion of sequestration, probably through facilitating recruitment of ATG8-phosphatidylethanolamine (PE) to the preautophagosomal structure (PAS) and/or its protection from deconjugation by ATG4. Composed of ATG2 and ATG18 in Saccharomyces cerevisiae.


elongin complex

A transcription elongation factor complex that suppresses RNA polymerase II pausing, and may act by promoting proper alignment of the 3'-end of nascent transcripts with the polymerase catalytic site. Consists of a transcriptionally active Elongin A subunit (about 100 kDa) and two smaller Elongin B (about 18 kDa) and Elongin C (about 15 kDa) subunits.


Schwann cell microvillus

Small finger-like extension of a Schwann cell that contacts the nodal membrane.


inner dense plaque of desmosome

The desmosomal part containing the C-termini of desmoplakins which interact with the keratin intermediate filaments, serving to tether the intermediate filaments to the plasma membrane.


mitochondrion-derived vesicle

A vesicle derived via budding from a mitochondrion. These vesicles often contain inner membrane and, much more rarely, cristae.


post-lysosomal vacuole

A membrane-bounded intracellular vesicle formed late in the endocytic pathway when the pH in the vacuole becomes neutral prior to exocytosis.


platelet alpha granule

A secretory organelle found in blood platelets, which is unique in that it exhibits further compartmentalization and acquires its protein content via two distinct mechanisms: (1) biosynthesis predominantly at the megakaryocyte (MK) level (with some vestigial platelet synthesis) (e.g. platelet factor 4) and (2) endocytosis and pinocytosis at both the MK and circulating platelet levels (e.g. fibrinogen (Fg) and IgG).


piccolo-bassoon transport vesicle

A cytoplasmic dense-core vesicle that transports a range of proteins including piccolo, bassoon, N-cadherin and syntaxin. The transported proteins may be associated with the external side of the vesicle, rather than being contained within the vesicle, therefore forming an aggregate of vesicle and proteins. Piccolo-bassoon transport vesicles (or PTVs) range in size from approximately 80 nm in diameter for dense core vesicles to 130 nm by 220 nm in area for aggregates. They are packaged via the trans-Golgi network before being transported through the axon.


merozoite dense granule

Electron-dense organelle with a granular internal matrix found throughout the merozoite life cycle stage of apicomplexan parasites; contains proteins destined to be secreted into the parasitophorous vacuole following parasite invasion of a host cell.


zymogen granule

A membrane-bounded, cytoplasmic secretory granule found in enzyme-secreting cells and visible by light microscopy. Contain zymogen, an inactive enzyme precursor, often of a digestive enzyme.


chloroplast vesicle

A intracellular vesicle that is part of a chloroplast.


virion transport vesicle

A vesicle used to transport the partial or complete virion between cellular compartments.


bacteroid-containing symbiosome

A symbiosome containing any of various structurally modified bacteria, such as those occurring on the root nodules of leguminous plants.


epidermal lamellar body

A specialized secretory organelle found in keratinocytes and involved in the formation of an impermeable, lipid-containing membrane that serves as a water barrier and is required for correct skin barrier function.


food vacuole

Vacuole within a parasite used for digestion of the host cell cytoplasm. An example of this component is found in the Apicomplexa.


synaptic vesicle, readily releasable pool

A synaptic vesicle belonging to the pool of vesicles that are the first to be released as a result of chemical or electrical stimulation e.g. by an action potential, have the highest presynaptic membrane fusion probability and correspond to about 1% of the total number of synaptic vesicles at a resting terminal bouton.


insulin-responsive compartment

A small membrane-bounded vesicle that releases its contents by exocytosis in response to insulin stimulation; the contents are enriched in GLUT4, IRAP and VAMP2.


A cytoplasmic vesicle composed of both tubulovesicular and clear core vesicles that transport synaptic vesicle-associated proteins. Proteins carried by synaptic vesicle protein transport vesicles (STVs) include synaptophysin, synapsin Ia, synaptotagmin and synaptobrevin/vesicle-associated membrane protein 2 (VAMP2). STVs are packaged via the trans-Golgi network before being transported through the axon.


chitosome

An intracellular membrane-bounded particle found in fungi and containing chitin synthase; it synthesizes chitin microfibrils. Chitin synthase activity exists in chitosomes and they are proposed to act as a reservoir for regulated transport of chitin synthase enzymes to the division septum.


COPI-coated inter-Golgi transport vesicle

A vesicle that mediates transport of cargo within the Golgi complex (for example, between cisternae of the Golgi stack).


neuronal dense core vesicle

A dense core vesicle (granule) that is part of a neuron. These vesicles typically contain neuropeptides. They can be found in all parts of neurons, including the soma, dendrites, axonal swellings (varicosities) and synaptic terminals.


clathrin-sculpted gamma-aminobutyric acid transport vesicle

A clathrin-sculpted lipid bilayer membrane-enclosed vesicle after clathrin release and containing gamma-aminobutyric acid transport vesicle.


leucosome

A tissue-specific, membrane-bounded cytoplasmic organelle within which uric acid and/or purines crystalize in reflective stacks. Leucosomes are synthesized in leucophore cells and have a whitish cast.


pigment granule

A small, subcellular membrane-bounded vesicle containing pigment and/or pigment precursor molecules. Pigment granule biogenesis is poorly understood, as pigment granules are derived from multiple sources including the endoplasmic reticulum, coated vesicles, lysosomes, and endosomes.


clathrin-coated endocytic vesicle

A clathrin-coated, membrane-bounded intracellular vesicle formed by invagination of the plasma membrane around an extracellular substance.


carotenoid vesicle

A tissue-specific cytoplasmic vesicle surrounded by a membrane half-leaflet within which carotenoid pigments are stored. Carotenoid vesicles are synthesized in xanthophores and erythrophore cells and are yellow, orange or red in appearance.


early phagosome

A membrane-bounded intracellular vesicle as initially formed upon the ingestion of particulate material by phagocytosis.


pexophagosome

A membrane-bounded intracellular vesicle involved in the degradation of peroxisome by macropexophagy.


mucocyst

A small subcellular vesicle, surrounded by a membrane, in the pellicle of ciliate protozoans that discharges a mucus-like secretion.


dense core granule

Electron-dense organelle with a granular internal matrix; contains proteins destined to be secreted.


cortical granule

A secretory vesicle that is stored under the cell membrane of an egg. These vesicles fuse with the egg plasma membrane as part of egg activation and are part of the block to polyspermy.


sorting endosome

A multivesicular body surrounded by and connected with multiple tubular compartments with associated vesicles.


gut granule

A lysosome-related organelle contained within the intestinal cells of the nematode C. elegans. Gut granules are acidified, birefringent, autofluorescent, and contain the vacuolar H+-ATPase. They also serve as sites of cellular zinc storage.


pinosome

A membrane-bounded, uncoated intracellular vesicle formed by the process of pinocytosis.


multivesicular body, internal vesicle

A membrane-bounded vesicle wholly contained within a multivesicular body.


clathrin-sculpted vesicle

A clathrin-sculpted lipid bilayer membrane-enclosed vesicle after clathrin release.


synaptic vesicle, recycling pool

A synaptic vesicle belonging to the pool that repopulate vacancies within the readily releasable pool (RRP) of synaptic vesicles, and require more significant stimuli than the RRP in order to release neurotransmitter; about 10-15% of the total number of synaptic vesicles at a resting terminal bouton are in this state.


alveolar lamellar body

A specialized secretory organelle found in type II pneumocytes and involved in the synthesis, secretion, and reutilization of pulmonary surfactant.


neurosecretory vesicle

A large cytoplasmic membrane-bounded vesicle with an electron dense granular core, up to 150-200 nm in diameter, found in neurosecretory cells in the hypothalamus.


clathrin-coated phagocytic vesicle

A clathrin-coated, membrane-bounded intracellular vesicle that arises from the ingestion of particulate material by phagocytosis.


postsynaptic recycling endosome

A recycling endosome of the postsynapse. In postsynaptic terminals with dendritic spines, it is typically located at the base of a dendritic spine. It is involved in recycling of neurotransmitter receptors to the postsynaptic membrane. In some cases at least, this recycling is activated by postsynaptic signalling and so can play a role in long term potentiation.


ciliary vesicle

A Golgi-derived vesicle to which the ciliary basal body docks via its transitional fibers. Its membrane is compositionally distinct from Golgi membranes, and will become the ciliary membrane once the ciliary vesicle is fused to the plasma membrane. The ciliary vesicle is thought to be formed by multiple smaller vesicles that attach to the transitional fibers and then fuse to form a larger vesicle.


platelet dense granule

Electron-dense granule occurring in blood platelets that stores and secretes adenosine nucleotides and serotonin. They contain a highly condensed core consisting of serotonin, histamine, calcium, magnesium, ATP, ADP, pyrophosphate and membrane lysosomal proteins.


micropinosome

A membrane-bounded, uncoated intracellular vesicle formed by the process of micropinocytosis.


endosome to plasma membrane transport vesicle

A transport vesicle that mediates transport from the endosome to the plasma membrane, and fuses with the plasma membrane to deliver lipids and membrane proteins to the plasma membrane and to release various cargo molecules, such as proteins or hormones, by exocytosis.


Golgi to plasma membrane transport vesicle

A transport vesicle that mediates transport from the Golgi to the plasma membrane, and fuses with the plasma membrane to release various cargo molecules, such as proteins or hormones, by exocytosis.


dendritic lamellar body

A specialized secretory organelle found in neurons and associated with the formation of dendrodendritic gap junctions.


azurophil granule

Primary lysosomal granule found in neutrophil granulocytes. Contains a wide range of hydrolytic enzymes and is released into the extracellular fluid.


symbiosome

A double-enveloped cell compartment, composed of an endosymbiont with its plasmalemma (as inner envelope) and a non-endosymbiotic outer envelope (the perisymbiontic membrane).


lamellar body

A membrane-bounded organelle, specialized for the storage and secretion of various substances (surfactant phospholipids, glycoproteins and acid phosphates) which are arranged in the form of tightly packed, concentric, membrane sheets or lamellae. Has some similar properties to, but is distinct from, a lysosome.


contractile vacuole

A specialized vacuole of eukaryotic cells, especially Protozoa, that fills with water from the cytoplasm and then discharges this externally by the opening of contractile vacuole pores. One of its functions is osmoregulatory.


aleurone grain

A membrane-bounded storage granule found in cells of the aleurone layer in plants; contains either a protein matrix, protein-carbohydrate bodies and/or globoids. Aleurone grains are formed by the vacuole, rough endoplasmic reticulum and dictyosomes.


mucin granule

A secretory granule that contains mucin.


clathrin-sculpted acetylcholine transport vesicle

A clathrin-sculpted lipid bilayer membrane-enclosed vesicle after clathrin release and containing acetylcholine.


Cvt vesicle

A cytosolic vesicle that is enclosed by a double membrane and is implicated in the cytoplasm to vacuole targeting pathway. These vesicles are found in the yeast S. cerevisiae, and contain vacuolar hydrolases, aminopeptidase I (Ape1p) and alpha-mannosidase (Ams1p).


apical recycling endosome

Tubulo-vesicular structure located in the apical cytoplasm that participates in apical cargo recycling in polarized epithelial cells.


organellar chromatophore

A bacteroid-containing symbiosome in which the bacterial component is a genetically highly reduced cyanobacterium that is photosynthetically active and incapable of an independent existence outside its host. The chromatophore functions as a photosynthetic organelle, and has been found and characterized in the amoeba Paulinella chromatophora.


phagolysosome

A membrane-bounded intracellular vesicle formed by maturation of an early phagosome following the ingestion of particulate material by phagocytosis; during maturation, phagosomes acquire markers of late endosomes and lysosomes.


cyanosome

A tissue-specific, membrane-bounded cytoplasmic organelle within which an unknown blue pigment is localized. Cyanosomes are synthesized in cyanophores and are blue in appearance.


amorphous vesicle

A cytoplasmic membrane-bounded vesicle first described in dendrites, categorized by smooth membranes, electron-lucent interiors and irregular shapes. Sometimes occurs in clumps. Amorphous vesicles have been found to contain material taken up from the extracellular space, therefore suggesting that they may be part of the endosomal pathway.


specific granule

Granule with a membranous, tubular internal structure, found primarily in mature neutrophil cells. Most are released into the extracellular fluid. Specific granules contain lactoferrin, lysozyme, vitamin B12 binding protein and elastase.


osmiophilic body

A membrane-bounded vesicle found predominantly in Plasmodium female gametocytes, that becomes progressively more abundant as the gametocyte reaches full maturity. These vesicles lie beneath the subpellicular membrane of the gametocyte, and the release of their contents into the parasitophorous vacuole has been postulated to aid in the escape of gametocytes from the erythrocyte after ingestion by the mosquito.


clathrin-sculpted monoamine transport vesicle

A clathrin-sculpted lipid bilayer membrane-enclosed vesicle after clathrin release and containing monoamines.


pterinosome

A tissue-specific, membrane-bounded cytoplasmic organelle within which pteridine pigments are synthesized and stored. Pterinosomes are synthesized in xanthophores and erythrophore cells and are yellow, orange or red in appearance.


chromaffin granule

Specialized secretory vesicle found in the cells of adrenal glands and various other organs, which is concerned with the synthesis, storage, metabolism, and secretion of epinephrine and norepinephrine.


sperm cytoplasmic droplet

A small amount of cytoplasm surrounded by a cell membrane that is generally retained in spermatozoa after spermiogenesis, when the majority of the cytoplasm is phagocytosed by Sertoli cells to produce what are called residual bodies. Initially, the droplet is located at the neck just behind the head of an elongated spermatid. During epididymal transit, the cytoplasmic droplet migrates caudally to the annulus at the end of the midpiece; the exact position and time varies by species. The cytoplasmic droplet consists of lipids, lipoproteins, RNAs, a variety of hydrolytic enzymes, receptors, ion channels, and Golgi-derived vesicles. The droplet may be involved in regulatory volume loss (RVD) at ejaculation, and in most species, though not in humans, the cytoplasmic droplet is lost at ejaculation. Note that the cytoplasmic droplet is distinct from 'excessive residual cytoplasm' that sometimes remains in epididymal spermatozoa, particularly when spermiogenesis has been disrupted.


presynaptic endosome

An endosome present in the presynapse that fuses with endocytic vesicles arising in the presynaptic endocytic zone. This organelle is believed to be involved in regeneration of synaptic vesicles.


fusiform vesicle

A cytoplasmic vesicle which contains two urothelial plaques and can deliver these plaques to the apical plasma membrane of urothelial superficial (umbrella) cells. It can also be formed by endocytosis of apical plasma membrane during contractions of the urinary bladder.


macropinosome

A membrane-bounded, uncoated intracellular vesicle formed by the process of macropinocytosis.


granular vesicle

A cytoplasmic membrane-bounded vesicle of varying size, but usually larger than 45 nm, with an electron dense granular core, found in noradrenergic and peptidergic cells.


ficolin-1-rich granule

Highly exocytosable gelatinase-poor granules found in neutrophils and rich in ficolin-1. Ficolin-1 is released from neutrophil granules by stimulation with fMLP or PMA, and the majority becomes associated with the surface membrane of the cells and can be detected by flow cytometry.


esterosome

A vesicle filled with crystalline protein that shows sequence similarities with various esterases.


basolateral recycling endosome

Tubulo-vesicular structure located in the basolateral cytoplasm that participates in basolateral cargo recycling in polarized epithelial cells.


endolysosome

An transient hybrid organelle formed by fusion of a late endosome with a lysosome, and in which active degradation takes place.


pericanalicular vesicle

A membrane-bounded vesicle found near the apical, or pericanalicular, membrane of a hepatocyte; contains proteins involved in bile salt transport and other fluid and solute transport processes.


postsynaptic early endosome

An early endosome of the postsynapse. It acts as the major sorting station on the endocytic pathway, targeting neurotransmitter receptors for degregation or recycling.


tertiary granule

A secretory granule that contains cathepsin and gelatinase and is readily exocytosed upon cell activation; found primarily in mature neutrophil cells.


postsynaptic endosome

An endosomal compartment that is part of the post-synapse. Only early and recycling endosomes are typically present in the postsynapse.


CGRP receptor complex

A transmembrane, G protein-coupled signalling receptor complex recognized by calcitonin gene-related peptides (CGRP).


calcitonin family receptor complex

A protein complex which is capable of calcitonin family receptor activity. Calcitonin family receptors may form dimers, trimers or tetramers; adrenomedullin and amylin receptors have only been observed as dimers so far.


adrenomedullin receptor complex

A transmembrane, G protein-coupled signalling receptor complex which is capable of adrenomedullin receptor activity.


amylin receptor complex 3

A G protein-coupled receptor complex that serves as a receptor for amylin polypeptide (AMY) and consists of a calcitonin receptor (CTR/CALCR) and a receptor activity-modifying protein (RAMP) 3. Amylin receptor complex 3 (AMY3) also serves as a receptor for the amyloid-beta complex. Ligand binding to AMY3 results in increased cytosolic calcium ion levels and in activation on multiple intracellular signalling pathways.


amylin receptor complex

A protein complex which is capable of amylin receptor activity.


amylin receptor complex 1

A G protein-coupled receptor complex that serves as a receptor for amylin polypeptide (AMY) and consists of a calcitonin receptor (CTR/CALCR) and a receptor activity-modifying protein (RAMP) 1. Amylin receptor complex 1 (AMY1) also serves as a receptor for the calcitonin related peptide (CGRP) and adrenomedullin (AM/ADM).


amylin receptor complex 2

A G protein-coupled receptor complex that serves as a receptor for amylin polypeptide (AMY) and consists of a calcitonin receptor (CTR/CALCR) and a receptor activity-modifying protein (RAMP) 2. Amylin receptor complex 2 (AMY2) also serves as a receptor for adrenomedullin (AM/ADM).


MutS complex

A homodimeric mismatch repair complex involved in binding to and correcting insertion/deletion mutations.


mismatch repair complex

Any complex formed of proteins that act in mismatch repair.


MutSalpha complex

A heterodimer involved in the recognition and repair of base-base and small insertion/deletion mismatches. In human the complex consists of two subunits, MSH2 and MSH6.


MutSgamma complex

A heterodimer involved in the stabilization of DNA recombination intermediates, the promotion of crossover recombination, and the proper assembly of the synaptonemal complex in meiotic prophase nuclei. In yeast the complex consists of two subunits, Msh4 and Msh5.


MutLbeta complex

A heterodimer involved in the recognition of base-base and small insertion/deletion mismatches. In human the complex consists of two subunits, MLH1 and PMS1.


MutSbeta complex

A heterodimer involved in binding to and correcting insertion/deletion mutations. In human the complex consists of two subunits, MSH2 and MSH3.


MutLalpha complex

A heterodimer involved in the recognition of base-base and small insertion/deletion mismatches. In human the complex consists of two subunits, MLH1 and PMS2.


MutLgamma complex

A heterodimer involved in the recognition of base-base and small insertion/deletion mismatches. In S. cerevisiae the complex consists of two subunits, Mlh1 and Mlh3.


MAML2-RBP-Jkappa-ICN4 complex

A protein complex that consists of the intracellular domain of Notch4 (ICN4), the DNA-binding transcription factor RBP-Jkappa, and the transcriptional coactivator Mastermind-like-2 (MAML2); the complex is involved in transcriptional activation in response to Notch-mediated signaling.


A protein complex that contains the cell adhesion molecules protocadherin-alpha-v4 and protocadherin-gamma-b2, and is involved in the regulation of protein localization to the plasma membrane.


Hrd1p ubiquitin ligase ERAD-L complex

A multiprotein complex that recognizes and ubiquitinates proteins with misfolded luminal domains during ER-associated protein degradation (ERAD). In S. cerevisiae, this complex contains the ubiquitin ligase Hrd1p.


brahma complex

A SWI/SNF-type complex that contains 8 to 14 proteins, including both conserved (core) and nonconserved components; contains the ATPase product of the Drosophila brm (brahma) or mammalian SMARCA2/BAF190B/BRM gene, or an ortholog thereof.


tubovesicular membrane network

A complex, symbiont-induced host-derived organelle that is comprised of multiple protein and lipid domains.


Grb2-EGFR complex

A protein complex that contains the epidermal growth factor receptor (EGFR) and Grb2, and is involved in linking EGFR activation to the p21-Ras pathway.


mitochondrial endopeptidase Clp complex

A Clp endopeptidase complex located in the mitochondrion.


signal recognition particle, plasma membrane targeting

A complex consisting of a protein and RNA component which binds the signal sequence of some proteins and facilitates their export to or across the plasma membrane.


transcription factor TFIIIB-alpha complex

A transcription factor TFIIIB-beta complex that contains the TATA-binding protein (TBP), B'' and a specialized homolog of the conserved subunit BRF referred to as BRFU or TFIIIB50, which found in human but not conserved in yeast; the complex is involved in the regulation of transcription from type 3 (upstream) RNA polymerase III promoters.


sperm connecting piece

The segment of the sperm flagellum that attaches to the implantation fossa of the nucleus in the sperm head; from the remnant of the centriole at this point, the axoneme extends throughout the length of the flagellum.


intestinal brush border layer

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A brush border layer that is part of a intestine.


Golgi trans cisterna membrane

The lipid bilayer surrounding any of the thin, flattened compartments that form the trans portion of the Golgi complex.


Golgi cisterna membrane

The lipid bilayer surrounding any of the thin, flattened compartments that form the central portion of the Golgi complex.


Golgi medial cisterna membrane

The lipid bilayer surrounding any of the thin, flattened compartments that form the medial portion of the Golgi complex.


Golgi cis cisterna membrane

The lipid bilayer surrounding any of the thin, flattened compartments that form the cis portion of the Golgi complex.


myosin V complex

A myosin complex containing a dimer of class V myosin heavy chains and associated light chains; involved in intracellular transport. Myosin V is a dimeric molecule consisting of conserved motor domains followed by 6 IQ motifs which bind specific light chains and calmodulin. The tail domain is important for cellular localization and cargo binding and can be divided into an alpha-helical coiled coil region and a C-terminal globular region.


excinuclease repair complex

Any of the protein complexes formed by the UvrABC excinuclease system, which carries out nucleotide excision repair. Three different complexes are formed by the 3 proteins as they proceed through the excision repair process. First a complex consisting of two A subunits and two B subunits bind DNA and unwind it around the damaged site. Then, the A subunits disassociate leaving behind a stable complex between B subunits and DNA. Now, subunit C binds to this B+DNA complex and causes subunit B to nick the DNA on one side of the complex while subunit C nicks the DNA on the other side of the complex. DNA polymerase I and DNA ligase can then repair the resulting gap.


TRAF2-GSTP1 complex

A protein complex comprising tumor necrosis factor (TNF) receptor-associated factor 2 (TRAF2) and glutathione S-transferase pi 1 (GSTP1). This complex is thought to disrupt the TNF signaling cascade, thus down-regulating inflammatory responses.


axon cytoplasm

Any cytoplasm that is part of a axon.


plus-end kinesin complex

Any complex that includes a dimer of molecules from the kinesin superfamily and any associated proteins, and moves towards the plus end of a microtubule.


kinesin complex

Any complex that includes a dimer of molecules from the kinesin superfamily, a group of related proteins that contain an extended region of predicted alpha-helical coiled coil in the main chain that likely produces dimerization. The native complexes of several kinesin family members have also been shown to contain additional peptides, often designated light chains as all of the noncatalytic subunits that are currently known are smaller than the chain that contains the motor unit. Kinesin complexes generally possess a force-generating enzymatic activity, or motor, which converts the free energy of the gamma phosphate bond of ATP into mechanical work.


kinesin I complex

A complex of two kinesin heavy chains and two kinesin light chains.


kinesin II complex

A complex consisting of two distinct motor subunits that form a heterodimer complexed with a third non-motor accessory subunit, the kinesin associated protein or KAP; the KIF3 heterodimer interacts via its C-terminal portion with KAP, which is thought to regulate the binding of the motor to cargo membranes.


minus-end kinesin complex

Any complex that includes a dimer of molecules from the kinesin superfamily and any associated proteins, and moves towards the minus end of a microtubule.


axonemal central bridge

Part of the 9+2 axoneme, that occurs in most motile cilia, consisting of the two bridges which connect the central pair of single microtubules.


triglyceride-rich plasma lipoprotein particle

A plasma lipoprotein particle that has a hydrophobic core enriched in triglycerides surrounded by an amphipathic monolayer of phospholipids, cholesterol and apolipoproteins. Triglyceride-rich lipoprotein particles transport lipids, which are non-covalently associated with the particles, in the blood.


A triglyceride-rich lipoprotein particle that typically contains APOB100, APOE and APOCs and has a density of 1.006-1.019 g/ml and a diameter of between 25-30 nm. IDL particles are found in blood and are formed by the delipidation of very-low-density lipoprotein particles (VLDL). IDL particles are removed from blood by the liver, following binding to the APOE receptor, or are converted to low-density lipoprotein (LDL).


LinE complex

A protein complex that associates with chromatin to form linear elements in fission yeast. In S. pombe, the LinE complex contains four main structural components (Rec10, Rec25, Rec27, and Mug20) and other associated proteins.


myosin II filament

A bipolar filament composed of myosin II molecules.


macropinocytic cup membrane

The portion of the plasma membrane surrounding a macropinocytic cup.


sensory dendrite

A dendrite that is found on a sensory neuron, and directly transduces a sensory signal from the sensory neuron to another neuron.


Elg1 RFC-like complex

A pentameric replication factor C (RLC) complex, which unloads the DNA polymerase processivity factor proliferating cell nuclear antigen (PCNA) from chromatin and has roles in telomere length regulation and other aspects of genome stability. In Saccharomyces the subunits are known as Elg1p, Rfc2p, Rfc3p, Rfc4p, and Rfc5p.


A homodimeric, bifunctional enzyme complex which catalyzes the synthesis and degradation of fructose 2,6-bisphosphate, and is required for both glycolysis and gluconeogenesis.


ER-to-endosome phospholipid transfer complex

Lipid transfer complex that is responsible for the non-vesicular transport of phospholipids, such as phosphatidylserine, from the endoplasmic reticulum to the endosome. It resides in the endosomal (acceptor) membrane and binds to specific lipids on the donor membrane at the ER-endosome contact site.


cytoplasmic side of Golgi membrane

The side (leaflet) of the Golgi membrane that faces the cytoplasm.


external side of mycolate outer membrane

The side (leaflet) of the mycolate outer membrane that faces the environment and any proteins embedded in it or loosely bound to its surface.


lumenal side of early endosome membrane

The side (leaflet) of the early endosome membrane that faces the lumen.


lumenal side of transport vesicle membrane

The side (leaflet) of the transport vesicle membrane that faces the lumen.


periplasmic side of plasma membrane

The side (leaflet) of a plasma membrane that faces the periplasm, and all proteins embedded in it or attached to its surface.


cytoplasmic side of mitochondrial outer membrane

The external (cytoplasmic) face of the mitochondrial outer membrane.


lumenal side of endosome membrane

The side (leaflet) of the endosome membrane that faces the lumen.


matrix side of mitochondrial inner membrane

The side (leaflet) of the mitochondrial inner membrane that faces the matrix.


cytoplasmic side of endoplasmic reticulum membrane

The side (leaflet) of the plasma membrane that faces the cytoplasm.


lumenal side of late endosome membrane

The side (leaflet) of the late endosome membrane that faces the lumen.


cytoplasmic side of transport vesicle membrane

The side (leaflet) of the transport vesicle membrane that faces the cytoplasm.


lumenal side of membrane

Any side (leaflet) of a membrane that faces the lumen of an organelle.


stromal side of plastid inner membrane

The side (leaflet) of the plastid inner membrane that faces the stroma, and any proteins embedded in it or loosely bound to its surface.


periplasmic side of cell outer membrane

The side (leaflet) of the outer membrane that faces the periplasm of the cell.


cytoplasmic side of trans-Golgi network transport vesicle membrane

The side (leaflet) of the trans-Golgi network transport vesicle membrane that faces the cytoplasm.


internal side of mycolate outer membrane

The side of the mycolate outer membrane that faces the cell wall peptidoglycan. It is rich in long-chain mycolic acids (hydroxylated branched-chain fatty acids) that are covalently linked to the cell wall peptidoglycan via an arabinogalactan network.


cytoplasmic side of plasma membrane, cell tip

The leaflet the plasma membrane at the cell tip that faces the cytoplasm and any proteins embedded or anchored in it or attached to its surface.


lumenal side of plastid thylakoid membrane

The side (leaflet) of the plastid thylakoid membrane that faces the lumen, and any proteins embedded in it or loosely bound to its surface.


external side of apical plasma membrane

The leaflet the apical region of the plasma membrane that faces away from the cytoplasm and any proteins embedded or anchored in it or attached to its surface.


cytoplasmic side of dendritic spine plasma membrane

The leaflet of the plasma membrane that faces the cytoplasm and any proteins embedded or anchored in it or attached to its surface surrounding a dendritic spine.


lumenal side of trans-Golgi network transport vesicle membrane

The side (leaflet) of the trans-Golgi network transport vesicle membrane that faces the lumen.


stromal side of plastid thylakoid membrane

The side (leaflet) of the plastid thylakoid membrane that faces the stroma, and any proteins embedded in it or loosely bound to its surface.


lumenal side of Golgi membrane

The side of the Golgi membrane that faces the lumen.


cytoplasmic side of smooth endoplasmic reticulum membrane

The side (leaflet) of the smooth endoplasmic reticulum membrane that faces the cytoplasm.


cytoplasmic side of rough endoplasmic reticulum membrane

The side (leaflet) of the rough endoplasmic reticulum membrane that faces the cytoplasm.


cytoplasmic side of endosome membrane

The side (leaflet) of the endosome membrane that faces the cytoplasm.


external side of cell outer membrane

The side of the outer membrane that is opposite to the side that faces the periplasm of the cell.


cytoplasmic side of early endosome membrane

The side (leaflet) of the early endosome membrane that faces the cytoplasm.


cytoplasmic side of lysosomal membrane

The side (leaflet) of the lysosomal membrane that faces the cytoplasm.


6-phosphofructokinase complex

A protein complex that possesses 6-phosphofructokinase activity; homodimeric, homooctameric, and allosteric homotetrameric forms are known.


cochlear basement membrane

The the continuous basement membrane found within the membranous labyrinth of the cochlea, known to extend from the limbus, down to the inner sulcus, across the basilar membrane, up to the external sulcus to the spiral prominence and radiating into the spiral ligament ensheathing the root cell processes.


mitotic spindle pole body

The microtubule organizing center that forms as part of the mitotic cell cycle; functionally homologous to the animal cell centrosome.


old mitotic spindle pole body

The spindle pole body that exists in a cell prior to spindle pole body duplication. An old spindle pole body segregates to the daughter cell upon mitosis, and lacks active proteins involved in signaling exit from mitosis.


new mitotic spindle pole body

The spindle pole body that is formed by spindle pole body duplication, and to which proteins involved in mitotic exit signaling (for example, the septation initiation network in fission yeast) localize.


G-protein alpha(q)-synembrin complex

A protein complex formed by the association of the guanine nucleotide exchange factor synembrin with the alpha(q) subunit of a heterotrimeric G protein.


plastid acetyl-CoA carboxylase complex

An acetyl-CoA carboxylase complex located in the stroma of a plastid.


acetyl-CoA carboxylase complex

A protein complex that catalyzes the first step in long-chain fatty acid biosynthesis. For example, in E. coli the complex is heterohexameric and composed of biotin carbonyl carrier protein, biotin carboxylase and the acetate CoA-transferase complex.


IgG B cell receptor complex

An IgG immunoglobulin complex that is present in the plasma membrane of B cells and is composed of two identical immunoglobulin heavy chains of an IgG isotype and two identical immunoglobulin light chains and a signaling subunit, a heterodimer of the Ig-alpha and Ig-beta proteins.


tubulin complex

A heterodimer of tubulins alpha and beta that constitutes the protomer for microtubule assembly.


mitochondrial inner membrane assembly complex

A protein complex that promotes the biogenesis of mitochondrial F1Fo-ATP synthase by facilitating assembly of the peripheral stalk. Loss of INAC function causes dissociation of the F1-domain from the membrane-integral Fo-portion.


Gram-negative-bacterium-type cell wall

The peptidoglycan layer of the Gram-negative cell envelope. In Gram-negative cells the peptidoglycan is relatively thin (1-2nm) and is linked to the outer membrane by lipoproteins. In Gram-negative cells the peptidoglycan is too thin to retain the primary stain in the Gram staining procedure and therefore cells appear red after Gram stain.


A homohexameric complex that recognizes and unfolds core proteasome substrate proteins, and translocates them to the core complex in an ATP dependent manner.


photoreceptor cell terminal bouton

A specialized region of the axon terminus portion of a photoreceptor cell axon. A photoreceptor cell is a neuron specialized to detect and transduce light.


recycling endosome lumen

The volume enclosed by the membranes of a recycling endosome.


Lewy body-like hyaline inclusion

Cytoplasmic inclusion found in neurons. It consists of filaments and granular materials, exhibits a dense core with a rough peripheral halo and lacks a limiting membrane. The filaments of these inclusions are composed of approximately 15-25 nm granule-coated fibrils in association with normal 10-nm neurofilaments.


P-TEFb-cap methyltransferase complex

A protein complex that is formed by the association of positive transcription elongation factor complex b (P-TEFb) with the mRNA capping methyltransferase.


lysosomal multienzyme complex

A protein complex found in the lysosome that contains beta-galactosidase, cathepsin A, alpha-neuraminidase and N-acetylgalactosamine-6-sulfate sulfatase, and is involved in glycosaminoglycan catabolism.


perichromatin fibrils

Structures of variable diameter visible in the nucleoplasm by electron microscopy, mainly observed near the border of condensed chromatin. The fibrils are enriched in RNA, and are believed to be sites of pre-mRNA splicing and polyadenylylation representing the in situ form of nascent transcripts.


caveola bulb

The region of a caveola that extends into the cytoplasm, excluding the neck (rim). This region is associated with intracellular caveola proteins.


collagen anchoring fibril

A specialised collagen fibril that functions as an anchor, binding to other collagen structures.


collagen type VII anchoring fibril

An antiparallel dimer of two collagen VII trimers, one end of which is embedded in the lamina densa while the other end attaches to banded collagen fibrils in the dermis.


cytosolic DNA-directed RNA polymerase complex

The eubacterial DNA-directed RNA polymerase is a multisubunit complex with a core composed of the essential subunits beta-prime, beta, and two copies of alpha and a fifth nonessential subunit called omega. An additional subunit, a sigma factor, is required for promoter recognition and specificity.


catenin-TCF7L2 complex

A protein complex that contains a catenin and TCF7L2 (TCF4), binds to the TCF DNA motif within a promoter element, and is involved in the regulation of WNT target gene transcription.


beta-catenin-TCF7L2 complex

A protein complex that contains beta-catenin and TCF7L2 (TCF4), binds to the TCF DNA motif within a promoter element, and is involved in the regulation of WNT target gene transcription.


gamma-catenin-TCF7L2 complex

A protein complex that contains gamma-catenin and TCF7L2 (TCF4), binds to the TCF DNA motif within a promoter element, and is involved in the regulation of WNT target gene transcription.


pollen aperture

An area where exine is reduced or absent, in the pollen wall.


eukaryotic translation elongation factor 1 complex

A multisubunit nucleotide exchange complex that binds GTP and aminoacyl-tRNAs, and catalyzes their codon-dependent placement at the A-site of the ribosome. In humans, the complex is composed of four subunits, alpha, beta, delta and gamma.


viral terminase, large subunit

The part of the viral terminase complex that contains the translocase and endonuclease activities and allows the translocation of the phage DNA into the procapsid. The large subunit usually assembles as a heterooligomer with the small subunit.


P5 peroxisome

A subform of peroxisome that corresponds to an intermediate in a peroxisome assembly pathway, which operates by conversion of peroxisomal subforms in the direction P1, P2 -> P3 -> P4 -> P5 -> P6. P5 peroxisomes are distinguished from the other subforms on the bases of buoyant density and protein content.


collagen sheet

A protein complex that consists of collagen triple helices associated to form a sheet-like network.


histone pre-mRNA 3'end processing complex

A ribonucleoprotein that binds to specific sites in, and is required for cleavage of, the 3'-end of histone pre-mRNAs. The complex contains the U7 snRNP and additional proteins, including the stem-loop binding protein (SLBP) and the exonuclease 3'hExo/Eri-1.


ISGF3 complex

A transcription factor complex that consists of a Stat1-Stat2 heterodimer and the IRF9 protein.


Ric1-Rgp1 guanyl-nucleotide exchange factor complex

A protein complex that acts as a nucleotide exchange factor for the GTPase Ypt6p, and is required for fusion of endosome-derived vesicles with the Golgi.


A protein complex that comprises one integrin alphav subunit, one integrin beta5 subunit, and vitronectin.


meiotic recombination initiation complex

A protein complex that initiates the formation of double-strand breaks (DSBs) required for meiotic recombination. Consists of a protein that catalyses formation of the double-strand breaks (Spo11 in S. cerevisiae and Rec12 in S. pombe), and a number of accessory proteins.


cytosolic proteasome core complex, beta-subunit complex

The proteasome core subcomplex that constitutes the two inner rings of the cytosolic proteasome core complex.