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Dock6 was identified as one of a family of proteins which share high sequence similarity with Dock180, the archetypal member of the DOCK family.[6] It has a similar domain arrangement to other DOCK proteins,[7] with a DHR1 domain known in other proteins to bind phospholipids,[8] and a DHR2 domain containing the GEF activity.[9]
There is currently very little information about the cellular role of this protein. However, Dock6 has been reported to exhibit dual GEF specificity towards the small G proteins Rac1 and Cdc42.[10] It is the only DOCK family member reported to activate both of these G proteins. The same study also showed that transfection of the Dock6 DHR2 domain into N1E-115 neuroblastoma cells promoted Rac- and Cdc42-dependent neurite outgrowth, although the physiological significance of this has yet to be demonstrated.
↑Côté JF, Vuori K (2006). "In Vitro Guanine Nucleotide Exchange Activity of DHR-2/DOCKER/CZH2 Domains". Regulators and Effectors of Small GTPases: Rho Family. Methods in Enzymology. Vol.406. pp.41–57. doi:10.1016/S0076-6879(06)06004-6. ISBN978-0-12-182811-0. PMID16472648.
↑Miyamoto Y, Yamauchi J, Sanbe A, Tanoue A (February 2007). "Dock6, a Dock-C subfamily guanine nucleotide exchanger, has the dual specificity for Rac1 and Cdc42 and regulates neurite outgrowth". Exp. Cell Res. 313 (4): 791–804. doi:10.1016/j.yexcr.2006.11.017. PMID17196961.
