RGD Reference Report - IkappaB kinase complexes: gateways to NF-kappaB activation and transcription. - Rat Genome Database

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IkappaB kinase complexes: gateways to NF-kappaB activation and transcription.

Authors: Scheidereit, C 
Citation: Scheidereit C Oncogene. 2006 Oct 30;25(51):6685-705.
RGD ID: 5129893
Pubmed: PMID:17072322   (View Abstract at PubMed)
DOI: DOI:10.1038/sj.onc.1209934   (Journal Full-text)

Transcription factors of the NF-kappaB family regulate hundreds of genes in the context of multiple important physiological and pathological processes. NF-kappaB activation depends on phosphorylation-induced proteolysis of inhibitory IkappaB molecules and NF-kappaB precursors by the ubiquitin-proteasome system. Most of the diverse signaling pathways that activate NF-kappaB converge on IkappaB kinases (IKK), which are essential for signal transmission. Many important details of the composition, regulation and biological function of IKK have been revealed in the last years. This review summarizes current aspects of structure and function of the regular stoichiometric components, the regulatory transient protein interactions of IKK and the mechanisms that contribute to its activation, deactivation and homeostasis. Both phosphorylation and ubiquitinatin (destructive as well as non-destructive) are crucial post-translational events in these processes. In addition to controlling induced IkappaB degradation in the cytoplasm and processing of the NF-kappaB precursor p100, nuclear IKK components have been found to act directly at the chromatin level of induced genes and to mediate responses to DNA damage. Finally, IKK is engaged in cross talk with other pathways and confers functions independently of NF-kappaB.


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