1-phosphatidylinositol-5-phosphate 4-kinase activity
1-phosphatidylinositol-5-phosphate 4-kinase activity
Catalysis of the reaction: a 1-phosphatidyl-1D-myo-inositol 5-phosphate + ATP = a 1-phosphatidyl-1D-myo-inositol 4,5-bisphosphate + ADP + H+.