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Measurement of Phospholipase C by Monitoring Inositol Phosphates Using [3H]Inositol-Labeling Protoco

2025-02-18 细胞技术 加入收藏
Hormones, neurotransmitters, chemoattractants, and growth factors all elicit int

Hormones, neurotransmitters, chemoattractants, and growth factors all elicit intracellular responses on binding to cell surface receptors by activating inositol phospholipid-specific phospholipase C (PLC). Activated PLC catalyzes the hydrolysis of phosphatidylinositol bisphosphate (PIP2 ), a minor membrane phospholipid, to form two second messengers, diacylglycerol (DAG) and inositol (1,4,5)trisphosphate [Ins(1,4,5,)P3 ]. DAG is a direct activator of protein kinase C isozymes, and Ins(1,4,5)P3 mobilizes intracellular Ca2+ . G protein-coupled receptors couple to the PLC-β family via G proteins, and tyrosine kinase receptors activate PLC-γ isozymes (1 ,2 ). Regardless of the PLC isozyme activated, the product is invariantly Ins(1,4,5)P3 .

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