Hydrolyzes the phosphatidylinositol 4,5-bisphosphate (PIP2) to generate 2 second messenger molecules diacylglycerol (DAG) and inositol 1,4,5-trisphosphate (IP3). DAG mediates the activation of protein kinase C (PKC), while IP3 releases Ca2+ from intracellular stores. Required for acrosome reaction in sperm during fertilization, probably by acting as an important enzyme for intracellular Ca2+ mobilization in the zona pellucida-induced acrosome reaction. May play a role in cell growth. Modulates the liver regeneration in cooperation with nuclear PKC. Overexpression up-regulates the Erk signaling pathway and proliferation.
Phospholipase C delta-4 overexpression upregulates ErbB1,2 expression, Erk signaling pathway, and proliferation in MCF-7 cells.Leung D.W., Tompkins C., Brewer J., Ball A., Coon M., Morris V., Waggoner D., Singer J.W.Mol. Cancer 3:15-15(2004)
Research Topic:Signal Transduction