NKIRAS1, also known as NF-kappa-B inhibitor-interacting Ras-like protein 1, belongs to the small GTPase superfamily. NKIRAS1 is atypical Ras-like protein that acts as a potent regulator of NF-kappa-B activity by preventing the degradation of NF-kappa-B inhibitor beta (NFKBIB) by most signals, explaining why NFKBIB is more resistant to degradation. It may act by blocking phosphorylation of NFKBIB and mediating cytoplasmic retention of p65/RELA NF-kappa-B subunit.