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NF-kB
Definition 1
NF-kB is a heterodimer complex of two DNA-binding subunits from two families of ubiquitous, inducible, nuclear transcription activators involved in cytokine-induced activation of gene expression. NFKB1 or NFKB2 is bound to REL, RELA, or RELB to form the NF-kB complex. NF-kB is inhibited by IkB proteins (NFKBIA or NFKBIB), which inactivate NF-kB by trapping it in the cytoplasm. Phosphorylation of IkB by kinases (IKBKA or IKBKB) marks them for ubiquitination, allowing NF-kB translocation to the nucleus and DNA binding at kappa-B transcription enhancer motifs. In B-lymphocytes, NF-kB binds to the immunoglobulin kappa light chain enhancer and in T-lymphocytes it binds to enhancers in virally infected cells, including HIV. (from OMIM 164011, 164012, 164910, 164014, 604758, and NCI) (NCI Thesaurus)
Definition 2
Ubiquitous, inducible, nuclear transcriptional activator that binds to enhancer elements in many different cell types and is activated by pathogenic stimuli. The NF-kappa B complex is a heterodimer composed of two DNA-binding subunits: NF-kappa B1 and relA. (NLM, Medical Subject Headings)
Definition 3
family of transcription factors involved in cytokine-induced activation of gene expression by binding to the enhancer; essential for HIV expression. (NIH CRISP Thesaurus)
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