Inhibitor of nuclear factor kappa B kinase subunit alpha (IKK-alpha) (IKK-alpha)

Inhibitor of nuclear factor kappa B kinase subunit alpha (IKK-alpha), encoded by the CHUK gene, is a serine/threonine kinase that serves as a key regulator of the NF-kappaB signaling pathway (UniProt: P78527). It is a member of the IKK complex, which also includes IKK-beta and IKK-gamma, but IKK-alpha is uniquely required for the activation of the non-canonical NF-kappaB pathway (NCBI Gene: 1147). In this pathway, IKK-alpha phosphorylates p100, leading to its processing into p52 and the subsequent nuclear translocation of RelB/p52 heterodimers, which regulate genes involved in lymphoid organogenesis and B-cell maturation (PubMed: 21170016). Beyond its role in immunity, IKK-alpha is vital for epidermal differentiation and skin development, often acting independently of its kinase activity (PubMed: 11520924). In oncology, IKK-alpha is frequently dysregulated, contributing to the progression of prostate, breast, and colorectal cancers by promoting cell survival and epithelial-mesenchymal transition (PubMed: 22460726). Therapeutic strategies focus on small-molecule inhibitors that target the ATP-binding pocket of the kinase domain to block its signaling activity (PubChem: CID 9813758). However, drug development faces challenges regarding selectivity between IKK-alpha and IKK-beta, as well as potential side effects like systemic immunosuppression and hepatotoxicity (PubMed: 15905522).

Other names

CHUKIKK1IKKATCF16Conserved helix-loop-helix ubiquitous kinaseNuclear factor NF-kappa-B inhibitor kinase alpha

Inhibition of p100 phosphorylation and processing, blockade of NF-kappaB nuclear translocation, and inhibition of IkappaB phosphorylation