Phospho-NFKB1 (Ser373) Polyclonal Antibody, Cy5.5 Conjugated

NF-kappa-B is a pleiotropic transcription factor present in almost all cell types and is the endpoint of a series of signal transduction events that are initiated by a vast array of stimuli related to many biological processes such as inflammation, immunity, differentiation, cell growth, tumorigenesis and apoptosis. NF-kappa-B is a homo- or heterodimeric complex formed by the Rel-like domain-containing proteins RELA/p65, RELB, NFKB1/p105, NFKB1/p50, REL and NFKB2/p52 and the heterodimeric p65-p50 complex appears to be most abundant one. The dimers bind at kappa-B sites in the DNA of their target genes and the individual dimers have distinct preferences for different kappa-B sites that they can bind with distinguishable affinity and specificity. Different dimer combinations act as transcriptional activators or repressors, respectively. NF-kappa-B is controlled by various mechanisms of post-translational modification and subcellular compartmentalization as well as by interactions with other cofactors or corepressors. NF-kappa-B complexes are held in the cytoplasm in an inactive state complexed with members of the NF-kappa-B inhibitor (I-kappa-B) family. In a conventional activation pathway, I-kappa-B is phosphorylated by I-kappa-B kinases (IKKs) in response to different activators, subsequently degraded thus liberating the active NF-kappa-B complex which translocates to the nucleus. NF-kappa-B heterodimeric p65-p50 and RelB-p50 complexes are transcriptional activators. The NF-kappa-B p50-p50 homodimer is a transcriptional repressor, but can act as a transcriptional activator when associated with BCL3. NFKB1 appears to have dual functions such as cytoplasmic retention of attached NF-kappa-B proteins by p105 and generation of p50 by a cotranslational processing. The proteasome-mediated process ensures the production of both p50 and p105 and preserves their independent function, although processing of NFKB1/p105 also appears to occur post-translationally. p50 binds to the kappa-B consensus sequence 5'-GGRNNYYCC-3', located in the enhancer region of genes involved in immune response and acute phase reactions. In a complex with MAP3K8, NFKB1/p105 represses MAP3K8-induced MAPK signaling; active MAP3K8 is released by proteasome-dependent degradation of NFKB1/p105.

Phospho-NFKB1 (Ser373) ; NFKB1 (phospho S373) ; NF kappa B; NFKB 1; NFKB p105; NFKB p50; NFKB1; Nuclear factor kappa B DNA binding subunit; Nuclear factor NF kappa B p105 subunit; Nuclear factor NF kappa B p50 subunit; Nuclear factor of kappa light polypeptide gene enhancer in B cells 1; DKFZp686C01211; DNA binding factor KBF1; DNA binding factor KBF1 EBP1; EBP 1; EBP1; KBF1; MGC54151; nuclear factor of kappa light polypeptide gene enhancer in B-cells 1; Nfkb1; NF-kappaB; NF-kappaB1; NF-KB1; p105; p50; p50/p105; DKFZp686C01211; EBP-1; KBF1; MGC54151; Nf kappa b DNA binding subunit; NF-KAPPAB; NF-KAPPAB1; NFKB; NFKB SUBUNIT P105/P50; NFKB-p105; NFKB1; NUCLEAR FACTOR KAPPA B DNA BINDING SUBUNIT; p105 Nfkb; p50 NF-kappa B; p50NFKB.