Journal
COLD SPRING HARBOR PERSPECTIVES IN BIOLOGY
Volume 2, Issue 3, Pages -Publisher
COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT
DOI: 10.1101/cshperspect.a000158
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The IKK kinase complex is the core element of the NF-kappa B cascade. It is essentially made of two kinases (IKK alpha and IKK beta) and a regulatory subunit, NEMO/IKK gamma. Additional components may exist, transiently or permanently, but their characterization is still unsure. In addition, it has been shown that two separate NF-kappa B pathways exist, depending on the activating signal and the cell type, the canonical (depending on IKK beta and NEMO) and the noncanonical pathway (depending solely on IKK alpha). The main question, which is still only partially answered, is to understand how an NF-kappa B activating signal leads to the activation of the kinase subunits, allowing them to phosphorylate their targets and eventually induce nuclear translocation of the NF-kappa B dimers. I will review here the genetic, biochemical, and structural data accumulated during the last 10 yr regarding the function of the three IKK subunits.
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