Abstract
Mutations in the SPRED1 (Sprouty-related protein with an EVH [Ena/Vasp homology] domain 1) and NF1 (neurofibromatosis 1) genes underlie clinically related human disorders. The NF1-encoded protein neurofibromin is a Ras GTPase-activating protein (GAP) and can directly limit Ras activity. Spred proteins also negatively regulate Ras signaling, but the mechanism by which they do so is not clear. In the July 1, 2012, issue of Genes & Development, Stowe and colleagues (pp. 1421-1426) present evidence that Spred1 recruits neurofibromin to the membrane, where it dampens growth factor-induced Ras activity, providing a satisfying explanation for the overlapping features of two human diseases.
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