Tags: Protein.
The Ras superfamily is a protein superfamily of small GTPases which are all related to a degree to the Ras protein subfamily (the key human members of which are KRAS NRAS and HRAS).There are more than a hundred proteins in the Ras superfamily. Based on structure sequence and function the Ras superfamily is divided into nine main families each of which further divided into subfamilies: Ras Rad Rab Rap Ran Rho Rheb Rit and Arf.