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Title: Antibodies to the ras gene product inhibit adenylate cyclase and accelerate progesterone-induced cell division in Xenopus laevis oocytes. Author: Sadler SE, Schechter AL, Tabin CJ, Maller JL. Journal: Mol Cell Biol; 1986 Feb; 6(2):719-22. PubMed ID: 3537692. Abstract: Microinjection of monoclonal antibodies (lines 238, 172, and 259) directed against the ras gene product, p21, into Xenopus laevis oocytes accelerated progesterone-induced germinal vesicle breakdown. Antibody 238 had the greatest effect on the acceleration of progesterone-induced oocyte maturation, and this effect was correlated with in vitro inhibition of adenylate cyclase (EC 4.6.1.1) activity in a concentration-dependent manner. Inhibition of adenylate cyclase by antibody 238 was also measured in membranes prepared from oocytes pretreated with either cholera toxin or pertussis toxin. These results suggest a role for the ras gene product in the regulation of vertebrate cell adenylate cyclase activity.[Abstract] [Full Text] [Related] [New Search]