CDC42, a small Rho GTPase, regulates the formation of F-actin-containing structures through its interaction with the downstream effector proteins. The protein encoded by this gene is a member of the Borg family of CDC42 effector proteins. Borg family proteins contain a CRIB (Cdc42/Rac interactive-binding) domain. They bind to, and negatively regulate the function of, CDC42. Coexpression of this protein with dominant negative mutant CDC42 protein in fibroblast was found to induce pseudopodia formation, which suggested a role of this protein in actin filament assembly and cell shape control.
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Joberty G, Perlungher RR, Sheffield PJ, Kinoshita M, Noda M, Haystead T, Macara IG (Oct 2001). "Borg proteins control septin organization and are negatively regulated by Cdc42". Nature Cell Biology. 3 (10): 861–6. doi:10.1038/ncb1001-861. PMID11584266.
Xue Y, Bi F, Zhang X, Zhang S, Pan Y, Liu N, Shi Y, Yao X, Zheng Y, Fan D (Jun 2006). "Role of Rac1 and Cdc42 in hypoxia induced p53 and von Hippel-Lindau suppression and HIF1alpha activation". International Journal of Cancer. Journal International Du Cancer. 118 (12): 2965–72. doi:10.1002/ijc.21763. PMID16395716.