canonical NF-kappaB signal transduction

Term ID

GO:0007249

Synonyms

• activation of the inhibitor of kappa kinase
• canonical NF-kappaB signaling cascade
• I-kappaB kinase/NF-kappaB cascade
• I-kappaB kinase/NF-kappaB signal transduction
• I-kappaB kinase/NF-kappaB signaling
• NF-kappaB cascade
• p50-dependent NF-kappaB signaling

Definition

An intracellular signaling cassette characterized by the I-kappaB-kinase (IKK)-dependent activation of NF-kappaB, also known as the canonical NF-kappaB signaling cascade. The cascade begins with activation of a trimeric IKK complex (consisting of catalytic kinase subunits IKKalpha and/or IKKbeta, and the regulatory scaffold protein NEMO) and ends with the regulation of transcription of target genes by NF-kappaB. In a resting state, NF-kappaB dimers are bound to I-kappaB proteins, sequestering NF-kappaB in the cytoplasm. Phosphorylation of I-kappaB targets I-kappaB for ubiquitination and proteasomal degradation, thus releasing the NF-kappaB dimers, which can translocate to the nucleus to bind DNA and regulate transcription. The canonical NF-kappaB pathway is mainly stimulated by proinflammatory cytokines such as IL-1beta, tumor necrosis factor (TNF)-alpha, antigen ligands, and toll-like receptors (TLRs). (2)

References

Ontology

GO: Biological Process    QuickGO    AmiGO