Nuclear Factor Kappa B (NFkB)
NFKB1; NF-KB1; EBP-1; KBF1; NF-Kappa-B; NFKB-P105; NFKB-P50; Nuclear Factor Of Kappa Light Polypeptide Gene Enhancer In B-Cells 1
Nuclear factor NF-kappa-B p105 subunit
is a 105 kD protein which can undergo cotranslational processing by the 26S proteasome to produce a 50 kD protein. The 105 kD protein is a Rel protein-specific transcription inhibitor and the 50 kD protein is a DNA binding subunit of the NF-kappaB (NF-κB) protein complex.
NF-κB is a transcription factor that is activated by various intra- and extra-cellular stimuli such as cytokines, oxidant-free radicals, ultraviolet irradiation, and bacterial or viral products. Activated NF-κB translocates into the nucleus and stimulates the expression of genes involved in a wide variety of biological functions; over 200 known genes are targets of NF-κB in various cell types, under specific conditions.