Members of the RAS (see HRAS; MIM 190020) subfamily of GTPases function in signal transduction as GTP/GDP-regulated switches that cycle between inactive GDP- and active GTP-bound states. Guanine nucleotide exchange factors (GEFs), such as RASGRP3, serve as RAS activators by promoting acquisition of GTP to maintain the active GTP-bound state and are the key link between cell surface receptors and RAS activation (Rebhun et al., 2000).[7]
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Brodie C, Steinhart R, Kazimirsky G, Rubinfeld H, Hyman T, Ayres JN, Hur GM, Toth A, Yang D, Garfield SH, Stone JC, Blumberg PM (Jul 2004). "PKCdelta associates with and is involved in the phosphorylation of RasGRP3 in response to phorbol esters". Molecular Pharmacology. 66 (1): 76–84. doi:10.1124/mol.66.1.76. PMID15213298. S2CID5774849.
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