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• W2163411441 abstract "Nuclear factor kappa B (NF-κB)/Rel proteins are dimeric, sequence-specific transcription factors involved in the activation of an exceptionally large number of genes in response to inflammation, viral and bacterial infections, and other stressful situations requiring rapid reprogramming of gene expression. In unstimulated cells, NF-κB is sequestered in an inactive form in the cytoplasm bound to inhibitory IκB proteins. Stimulation leads to the rapid phosphorylation, ubiquitinylation, and ultimately proteolytic degradation of IκB, which frees NF-κB to translocate to the nucleus and activate the transcription of its target genes. The multisubunit IκB kinase (IKK) responsible for the inducible phosphorylation of IκB appears to be the initial point of convergence for most stimuli that activate NF-κB. IKK contains two catalytic subunits, IKKα and IKKβ, both of which phosphorylate IκB at sites phosphorylated in vivo. Gene knockout studies indicate that IKKβ is primarily responsible for the activation of NF-κB in response to proinflammatory stimuli, whereas IKKα is essential for keratinocyte differentiation. The activity of IKK is regulated by phosphorylation. IKK contains a regulatory subunit, IKKγ, which is critical for activation of IKK and is postulated to serve as a recognition site for upstream activators. When phosphorylated, the IKK recognition site on IκBα serves as a specific recognition site for the κ-TrCP-like component of a Skp1-Cullin-F-box-type E3 ubiquitin-protein ligase. A variety of other signaling events, including phosphorylation of NF-κB, phosphorylation of IKK, new synthesis of IκBs, and the processing of NF-κB precursors provide mechanisms of modulating the amount and duration of NF-κB activity." @default.
• W2163411441 created "2016-06-24" @default.
• W2163411441 creator A5037625317 @default.
• W2163411441 creator A5056315342 @default.
• W2163411441 date "1999-10-26" @default.
• W2163411441 modified "2023-10-09" @default.
• W2163411441 title "The NF-κB Activation Pathway: A Paradigm in Information Transfer from Membrane to Nucleus" @default.
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