Catalytic activity:A phosphatidylcholine + H (2) O = choline + a phosphatidate. ,enzyme regulation:Stimulated by phosphatidylinositol 4 ,5-bisphosphate and phosphatidylinositol 3 ,4 ,5-trisphosphate , activated by the phosphokinase C-alpha , by the ADP-ribosylation factor-1 (ARF-1) , and to a lesser extent by GTP-binding proteins: RHO A , RAC-1 and CDC42. Inhibited by oleate. ,Function:Implicated as a critical step in numerous cellular pathways , including signal transduction , membrane trafficking , and the regulation of mitosis. May be involved in the regulation of perinuclear intravesicular membrane traffic. ,online information:Phospholipase D entry ,similarity:Belongs to the phospholipase D family. ,similarity:Contains 1 PH domain. ,similarity:Contains 1 PX (phox homology) domain. ,similarity:Contains 2 PLD phosphodiesterase domains. ,subunit:Interacts with PIP5K1A. ,tissue specificity:Expressed abundantly in the pancreas and heart and at high levels in brain , placenta , spleen , uterus and small intestine. ,
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