M-Ras/R-Ras3 Proteins and Enzymes

M-Ras, also known as R-Ras3, is a small GTP-binding protein of the Ras superfamily of GTPases. M-Ras comprises an R-Ras subfamily with fellow members R-Ras and TC21 (R-Ras2). While highly homologous elsewhere, M-Ras differs at its carboxyl terminus from both R-Ras and TC21, suggesting this GTPase may interact with novel signaling effectors.