Abstract
THE protein Raf-1, a key mediator of mitogenesis and differentia-tion, associates with p21*"a5 (refs 1-3). However, the regulation of the serine/threonine kinase activity of Raf-1 is still not understood4 13. Using the yeast two-hybrid system8'14"16, we identi-fied two structurally related proteins that interact with the amino-terminal region of Raf-1. These proteins, 14-3-3 £ (PLA2) and 14-3-3 p (HS1), are members of the 14-3-3 family of proteins17'23. Expression of 14-3-3 proteins in Xenopm oocytes enhanced Raf-1 activity and promoted Raf-1-dependent oocyte maturation. A dominant negative mutant of Raf-1 blocked the effects of 14-3-3 protein.
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Fantl, W., Muslin, A., Kikuchi, A. et al. Activation of Raf-1 by 14-3-3 proteins. Nature 371, 612–614 (1994). https://doi.org/10.1038/371612a0
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DOI: https://doi.org/10.1038/371612a0
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