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Letter

Nature Cell Biology 8, 398–406 (1 April 2006) | doi:10.1038/ncb1384

Sensing of Lys 63-linked polyubiquitination by NEMO is a key event in NF-|[kappa]|B activation

Chuan-Jin Wu , Dietrich B. Conze , Tao Li , Srinivasa M. Srinivasula & Jonathan D. Ashwell

The transcription factor NF-κB is sequestered in the cytoplasm in a complex with IκB. Almost all NF-κB activation pathways converge on IκB kinase (IKK), which phosphorylates IκB resulting in Lys 48-linked polyubiquitination of IκB and its degradation.