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Evidence for involvement of guanine nucleotide‐binding regulatory proteins in the activation of phospholipases by hormones

Evidence for involvement of guanine nucleotide‐binding regulatory proteins in the activation of... Guanine nudeotide‐binding regulatory proteins similar to Gs and Gi may be involved in the activation of phospholipases C and A2 by hormones and other ligands. The binding of hormones to receptors that activate phospholipase C is decreased by guanine nucleotides and these hormones also stimulate a high‐affinity GTPase activity in cell membranes. Effects of hormones on phospholipase C activity in cell‐free preparations are dependent on the presence of guanine nucleotides. In addition, fluoride and nonhydrolyzable GTP analogs activate phospholipases in a manner that can be blocked by GDPβS. The putative guanine nucleotide‐binding regulatory protein that appears to be involved in activation of phospholipase C is sensitive to pertussis toxin in some cells but not in others.— Fain, J. N.; Wallace, M. A.; Wojcikiewigz, R. J. H. Evidence for involvement of guanine nucleotide‐binding regulatory proteins in the activation of phospholipases by hormones. FASEB J, 2: 2569‐2574; 1988. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The FASEB journal Wiley

Evidence for involvement of guanine nucleotide‐binding regulatory proteins in the activation of phospholipases by hormones

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References (58)

Publisher
Wiley
Copyright
© Federation of American Societies for Experimental Biology
ISSN
0892-6638
eISSN
1530-6860
DOI
10.1096/fasebj.2.10.2838362
Publisher site
See Article on Publisher Site

Abstract

Guanine nudeotide‐binding regulatory proteins similar to Gs and Gi may be involved in the activation of phospholipases C and A2 by hormones and other ligands. The binding of hormones to receptors that activate phospholipase C is decreased by guanine nucleotides and these hormones also stimulate a high‐affinity GTPase activity in cell membranes. Effects of hormones on phospholipase C activity in cell‐free preparations are dependent on the presence of guanine nucleotides. In addition, fluoride and nonhydrolyzable GTP analogs activate phospholipases in a manner that can be blocked by GDPβS. The putative guanine nucleotide‐binding regulatory protein that appears to be involved in activation of phospholipase C is sensitive to pertussis toxin in some cells but not in others.— Fain, J. N.; Wallace, M. A.; Wojcikiewigz, R. J. H. Evidence for involvement of guanine nucleotide‐binding regulatory proteins in the activation of phospholipases by hormones. FASEB J, 2: 2569‐2574; 1988.

Journal

The FASEB journalWiley

Published: Jul 1, 1988

Keywords: ; ; ; ; ; ;

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