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Product Name
Phospho-NF-KB p105/p50 (Ser907) Rabbit pAb
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Gene ID
4790
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SwissProt ID
P19838
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Gene Name
NFKB1
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Alternative Names
DNA-binding factor KBF1, EBP-1, NF-kappa-B1 p84/NF-kappa-B1 p98, NFKB1, NFkB-p50, Nuclear factor NF-kappa-B p105 subunit, nuclear factor NF-kappa-B p50 subunit
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Background
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.
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Research Field
Cell Biology
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Product Categories
Primary antibody
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Host
Rabbit
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Reactivity
Human
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Application
WB,IHC-P,IP
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Dilution Ratio
WB: 1/500-1/3000 IHC: 1/50-1/100
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Molecular Weight
Calculated MW: 105 kDa
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Clonality
Polyclonal Antibody
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Isotype
IgG
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Immunogen
The antiserum was produced against synthesized phosphopeptide derived from human NF-κB p105/p50 around the phosphorylation site of Ser907
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Purification
Affinity Purified
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Conjugation
Unconjugated
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Modification
Phosphorylated
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Form
liquid
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Buffer System
Rabbit IgG in phosphate buffered saline (without Mg2+ and Ca2+), pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol.
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Storage
Store at 4°C short term. Aliquot and store at -20°C long term. Avoid freeze/thaw cycles.