|SCOPe||5p21 / SUPFAM|
The Ras superfamily is a protein superfamily of small GTPases. Members of the superfamily are divided into families and subfamilies based on their structure, sequence and function. The five main families are Ras, Rho, Ran, Rab and Arf GTPases. The Ras family itself is further divided into 6 subfamilies: Ras, Ral, Rap, Rheb, Rad and Rit. Miro is a recent contributor to the superfamily. Each subfamily shares the common core G domain, which provides essential GTPase and nucleotide exchange activity.
The surrounding sequence helps determine the functional specificity of the small GTPase, for example the 'Insert Loop', common to the Rho subfamily, specifically contributes to binding to effector proteins such as WASP.
Subfamilies and members
The following is a list of human proteins belonging to the Ras superfamily:
- Wennerberg K, Rossman KL, Der CJ (March 2005). "The Ras superfamily at a glance". J. Cell Sci. 118 (Pt 5): 843–6. doi:10.1242/jcs.01660. PMID 15731001.
- Goitre, L; Trapani, E; Trabalzini, L; Retta, SF (26 December 2013). The Ras superfamily of small GTPases: the unlocked secrets. Methods in Molecular Biology. 1120. pp. 1–18. doi:10.1007/978-1-62703-791-4_1. ISBN 978-1-62703-790-7. PMID 24470015.
- Munemitsu S, Innis M, Clark R, McCormick F, Ullrich A, Polakis P (1990). "Molecular cloning and expression of a G25K cDNA, the human homolog of the yeast cell cycle gene CDC42". Mol Cell Biol. 10 (11): 5977–82. doi:10.1128/MCB.10.11.5977. ISSN 0270-7306. PMC 361395. PMID 2122236.