Download MendeleyStructure of the rgRGS domain of p115RhoGEF.
Chen, Z., Wells, C.D., Sternweis, P.C., Sprang, S.R.(2001) Nat Struct Biol 8: 805-809
- PubMed: 11524686
- DOI: https://doi.org/10.1038/nsb0901-805
- Primary Citation of Related Structures:
1IAP - PubMed Abstract:
p115RhoGEF, a guanine nucleotide exchange factor for Rho GTPase, is also a GTPase activating protein (GAP) for G(12) and G(13) heterotrimeric G alpha subunits. Near its N-terminus, p115RhoGEF contains a domain (rgRGS) with remote sequence identity to RGS (regulators of G protein signaling) domains. The rgRGS domain is necessary but not sufficient for the GAP activity of p115RhoGEF. The 1.9 A resolution crystal structure of the rgRGS domain shows structural similarity to RGS domains but possesses a C-terminal extension that folds into a layer of helices that pack against the hydrophobic core of the domain. Mutagenesis experiments show that rgRGS may form interactions with G alpha(13) that are analogous to those in complexes of RGS proteins with their G alpha substrates.
Organizational Affiliation:
Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, Texas 75390-9050, USA.
