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Science 26 May 1995:
Vol. 268. no. 5214, pp. 1166 - 1169
DOI: 10.1126/science.7761832
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Articles

Science, Vol 268, Issue 5214, 1166-1169
Copyright © 1995 by American Association for the Advancement of Science

articles

A region of adenylyl cyclase 2 critical for regulation by G protein beta gamma subunits

J Chen, M DeVivo, J Dingus, A Harry, J Li, J Sui, DJ Carty, JL Blank, JH Exton, RH Stoffel, and al. et

Department of Pharmacology, Mount Sinai School of Medicine, City University of New York, NY 10029, USA.

Receptor-mediated activation of heterotrimeric guanine nucleotide-binding proteins (G proteins) results in the dissociation of alpha from beta gamma subunits, thereby allowing both to regulate effectors. Little is known about the regions of effectors required for recognition of G beta gamma. A peptide encoding residues 956 to 982 of adenylyl cyclase 2 specifically blocked G beta gamma stimulation of adenylyl cyclase 2, phospholipase C-beta 3, potassium channels, and beta-adrenergic receptor kinase as well as inhibition of calmodulin-stimulated adenylyl cyclases, but had no effect on interactions between G beta gamma and G alpha o. Substitutions in this peptide identified a functionally important motif, Gln-X-X-Glu-Arg, that is also conserved in regions of potassium channels and beta-adrenergic receptor kinases that participate in G beta gamma interactions. Thus, the region defined by residues 956 to 982 of adenylyl cyclase 2 may contain determinants important for receiving signals from G beta gamma.


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J. J. Tesmer, R. K. Sunahara, A. G. Gilman, and S. R. Sprang (1997)
Science 278, 1907-1916
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S. Herlitze, G. H. Hockerman, T. Scheuer, and W. A. Catterall (1997)
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Structural Determinants for Interaction with Three Different Effectors on the G Protein beta Subunit.
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K. Schulz, S. Danner, P. Bauer, S. Schroder, and M. J. Lohse (1996)
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