4ekc: Difference between revisions
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== Function == | == Function == | ||
[https://www.uniprot.org/uniprot/GNAQ_MOUSE GNAQ_MOUSE] Guanine nucleotide-binding proteins (G proteins) are involved as modulators or transducers in various transmembrane signaling systems. Regulates B-cell selection and survival and is required to prevent B-cell-dependent autoimmunity. Regulates chemotaxis of BM-derived neutrophils and dendritic cells (in vitro).<ref>PMID:17938235</ref> <ref>PMID:20624888</ref> | [https://www.uniprot.org/uniprot/GNAQ_MOUSE GNAQ_MOUSE] Guanine nucleotide-binding proteins (G proteins) are involved as modulators or transducers in various transmembrane signaling systems. Regulates B-cell selection and survival and is required to prevent B-cell-dependent autoimmunity. Regulates chemotaxis of BM-derived neutrophils and dendritic cells (in vitro).<ref>PMID:17938235</ref> <ref>PMID:20624888</ref> | ||
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== Publication Abstract from PubMed == | |||
The heterotrimeric G protein Galphaq is a key regulator of blood pressure, and excess Galphaq signaling leads to hypertension. A specific inhibitor of Galphaq is the GTPase activating protein (GAP) known as regulator of G protein signaling 2 (RGS2). The molecular basis for how Galphaq/11 subunits serve as substrates for RGS proteins and how RGS2 mandates its selectivity for Galphaq is poorly understood. In crystal structures of the RGS2-Galphaq complex, RGS2 docks to Galphaq in a different orientation from that observed in RGS-Galphai/o complexes. Despite its unique pose, RGS2 maintains canonical interactions with the switch regions of Galphaq in part because its alpha6 helix adopts a distinct conformation. We show that RGS2 forms extensive interactions with the alpha-helical domain of Galphaq that contribute to binding affinity and GAP potency. RGS subfamilies that do not serve as GAPs for Galphaq are unlikely to form analogous stabilizing interactions. | |||
Structural and functional analysis of the regulator of G protein signaling 2-galphaq complex.,Nance MR, Kreutz B, Tesmer VM, Sterne-Marr R, Kozasa T, Tesmer JJ Structure. 2013 Mar 5;21(3):438-48. doi: 10.1016/j.str.2012.12.016. Epub 2013 Feb, 21. PMID:23434405<ref>PMID:23434405</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
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==See Also== | ==See Also== | ||
Latest revision as of 10:51, 13 August 2026
Structure of human regulator of G protein signaling 2 (RGS2) in complex with murine Galpha-q(R183C)
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