NAK Antibody

Nuclear factor kappa B (NF-kappaB) is a ubiquitous transcription factor and an essential mediator of gene expression during activation of immune and inflammatory responses. NF-kappaB mediates the expression of a great variety of genes in response to extracellular stimuli. NF-kappaB is associated with IkappaB proteins in the cell cytoplasm, which inhibit NF-kappaB activity. Phosphorylation of I-kappaB by IkappaB kinase (IKK) complex leads to degradation of I-kappaB and activation of NF-kappaB. The IKK complex contains IKKalpha, IKKbeta, and IKKgamma. A novel IKK related kinase was recently identified and designated TBK1 (TANK-binding kinase 1), NAK (NF-kappaB-activating kinase), and T2K. NAK/TBK1 activates IKKbeta through direct phosphorylation. NAK/TBK1 is activated by growth factors and PMA and mediates IKK and NF-kappaB activation in response to growth factors. NAK/TBK1 functions upstream of NIK and the IKK complex. NAK/TBK1 is also critical in protecting embryonic liver from apoptosis.