Atypical Ras-like protein that may act as a regulator of NF-kappa-B activity, possibly by preventing the degradation of NF-kappa-B inhibitor cactus. Interacts with NF-kappa-B inhibitor cactus. In contrast to other members of the Ras family, the members of the KappaB-Ras subfamily do not contain the conserved Gly and Gln residues in positions 18 and 71, which are replaced by Lys and Leu residues, respectively, and are therefore similar to the constitutively active forms of oncogenic forms of Ras. This suggests that members of this family are clearly different from other small GTPases proteins. Belongs to the small GTPase superfamily. Ras family. KappaB-Ras subfamily.