proton-transporting two-sector ATPase complex, catalytic domain
proton-transporting two-sector atpase complex, catalytic domain
"A protein complex that forms part of a proton-transporting two-sector ATPase complex and catalyzes ATP hydrolysis or synthesis. The catalytic domain (F1, V1, or A1) comprises a hexameric catalytic core and a central stalk, and is peripherally associated with the membrane when the two-sector ATPase is assembled."