IKK

The IKK family is the convergence point for NF-kappaB signaling and contains two canonical catalytic subunits, IKK alpha (CHUK) and IKK beta (IKBKB), together with the related IKK epsilon (IKBKE) and TBK1. In the canonical pathway IKK beta, within the IKK alpha/beta/gamma (NEMO) complex, phosphorylates I kappa B alpha, triggering ubiquitination and degradation and thereby releasing NF-kappaB; IKK alpha mediates the non-canonical p100-to-p52 route. IKK epsilon and TBK1 act in innate immunity, phosphorylating IRF3 and STING to induce type I interferon, and also support selective autophagy and tumor cell survival. NEMO loss-of-function mutations cause incontinentia pigmenti, and TBK1 inhibitors are in oncology trials.