Abstract
Cleavage of phosphatidylinositol 4,5-bisphosphate by phospholipase C results in the production of two important second messengers: inositol-1,4,5-trisphosphate and 1,2-diacylglycerol. Although several receptors promote this cleavage, the molecular details of phospholipase C activation have remained unresolved. In this study, occupancy of a Ca 2+ -mobilizing receptor, the oligopeptide chemoattractant receptor on human polymorphonuclear leukocyte plasma membranes, was found to lead to the activation of a guanine nucleotide regulatory (N) protein by guanosine 5′-triphosphate. The activated N protein then stimulated a polyphosphoinositide-specific phospholipase C by reducing the Ca 2+ requirement for expression of this activity from superphysiological to normal intracellular concentrations. Therefore, the N protein-mediated activation of phospholipase C may be a key step in the pathway of cellular activation by chemoattractants and certain other hormones.
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Dates
Type | When |
---|---|
Created | 18 years, 10 months ago (Oct. 5, 2006, 4:28 p.m.) |
Deposited | 1 year, 7 months ago (Jan. 13, 2024, 10:25 a.m.) |
Indexed | 1 year, 2 months ago (June 17, 2024, 4:38 p.m.) |
Issued | 39 years, 4 months ago (April 4, 1986) |
Published | 39 years, 4 months ago (April 4, 1986) |
Published Print | 39 years, 4 months ago (April 4, 1986) |
@article{Smith_1986, title={Receptor-Coupled Activation of Phosphoinositide-Specific Phospholipase C by an N Protein}, volume={232}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.3006254}, DOI={10.1126/science.3006254}, number={4746}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Smith, Charles D. and Cox, C. Christine and Snyderman, Ralph}, year={1986}, month=apr, pages={97–100} }