Structural highlights
Function[PLCD1_RAT] The production of the second messenger molecules diacylglycerol (DAG) and inositol 1,4,5-trisphosphate (IP3) is mediated by activated phosphatidylinositol-specific phospholipase C enzymes. Essential for trophoblast and placental development. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedThe X-ray crystal structure of the high affinity complex between the pleckstrin homology (PH) domain from rat phospholipase C-delta 1 (PLC-delta 1) and inositol-(1,4,5)-trisphosphate (Ins(1,4,5)P3) has been refined to 1.9 A resolution. The domain fold is similar to others of known structure. Ins(1,4,5)P3 binds on the positively charged face of the electrostatically polarized domain, interacting predominantly with the beta 1/beta 2 and beta 3/beta 4 loops. The 4- and 5-phosphate groups of Ins(1,4,5)P3 interact much more extensively than the 1-phosphate. Two amino acids in the PLC-delta 1 PH domain that contact Ins(1,4,5)P3 have counterparts in the Bruton's tyrosine kinase (Btk) PH domain, where mutational changes cause inherited agammaglobulinemia, suggesting a mechanism for loss of function in Btk mutants. Using electrostatics and varying levels of head-group specificity, PH domains may localize and orient signaling proteins, providing a general membrane targeting and regulatory function. Structure of the high affinity complex of inositol trisphosphate with a phospholipase C pleckstrin homology domain.,Ferguson KM, Lemmon MA, Schlessinger J, Sigler PB Cell. 1995 Dec 15;83(6):1037-46. PMID:8521504[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences | ||||||||||||||||||||
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