catalytic activity:ATP + 1-phosphatidyl-1D-myo-inositol 4-phosphate = ADP + 1-phosphatidyl-1D-myo-inositol 3,4-bisphosphate.,function:In vitro, phosphorylates PtdIns and PtdIns4P but not PtdIns(4,5)P2.,similarity:Belongs to the PI3/PI4-kinase family.,similarity:Contains 1 C2 domain.,similarity:Contains 1 PI3K/PI4K domain.,similarity:Contains 1 PX (phox homology) domain.,tissue specificity:Highly expressed in liver, prostate and testis. Lower levels in small intestine, kidney and pancreas.,
Membrane ; Peripheral membrane protein .
Highly expressed in liver, prostate and testis. Lower levels in small intestine, kidney and pancreas.
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