Small GTPases of the Rho family, Rho, Rac, and Cdc42, are critical regulators of the actin cytoskeleton and many other cellular processes.
Rho GTPases are activated by Dbl-homology (DH)-domain-containing guanine nucleotide exchange factors (GEFs).
DOCK 11 (dedicator of cytokinesis 11), also known as ACG or ZIZ2 (zizimin2), is a 2073aa protein belonging to the DOCK family of cytokinesis-regulating proteins that is mainly expressed in peripheral blood leukocytes.
DOCK 11 functions as a GEF that binds and activates Cdc42 by exchanging bound GDP for free GTP.