PLC beta 3 Gq: Difference between revisions

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Shir Navot, Michal Harel, Joel L. Sussman

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 == Introduction ==
-Phospholipase C beta 3 (PLC-β3) catalyzes the hydrolysis of phosphatidylinositol 4,5-bisphosphate [PIP2] to the second messengers inositol 1,4,5-trisphosphate [IP3] and diacylglycerol [DAG] in an essential step for many physiological cascades. When the receptor is stimulated by ligand of some kind it increase exchange of guanosine diphosphate (GDP) for guanosine triphosphate (GTP) on Gαq. GTP-bound Gαq activates PLC- β3, and PLC- β3 increases up to three orders of magnitude the rate of hydrolysis of GTP by its activating G protein. This is a unique mechanism in which the PLC-β3 enzyme has the ability to terminate the Gαq protein signal in addition to being activated by it.<ref>PMID:20966218</ref> <ref>PMID:23880553</ref>
+Phospholipase C beta 3 (PLC-β3) catalyzes the hydrolysis of phosphatidylinositol 4,5-bisphosphate [PIP2] to the second messengers inositol 1,4,5-trisphosphate [IP3] and diacylglycerol [DAG] in an essential step for many physiological cascades. When the receptor is stimulated by ligand of some kind it increases exchange of guanosine diphosphate (GDP) to guanosine triphosphate (GTP) on Gαq. GTP-bound Gαq activates PLC- β3, and PLC- β3 increases up to three orders of magnitude the rate of hydrolysis of GTP by its activating G protein. This is a unique mechanism in which the PLC-β3 enzyme has the ability to terminate the Gαq protein signal in addition to being activated by it.<ref>PMID:20966218</ref> <ref>PMID:23880553</ref>
 == Structural highlights ==