Product: Phospho-NF kappaB p100/p52 (Ser872) Antibody
Catalog: AF3375
Description: Rabbit polyclonal antibody to Phospho-NF kappaB p100/p52 (Ser872)
Application: WB IF/ICC
Reactivity: Human, Mouse
Prediction: Pig, Bovine, Horse, Sheep, Rabbit, Dog
Mol.Wt.: 100kDa; 97kD(Calculated).
Uniprot: Q00653
RRID: AB_2834806

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 100ul $280 In stock
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Product Info

WB 1:500-1:2000, IF/ICC 1:100-1:500
*The optimal dilutions should be determined by the end user.

WB: For western blot detection of denatured protein samples. IHC: For immunohistochemical detection of paraffin sections (IHC-p) or frozen sections (IHC-f) of tissue samples. IF/ICC: For immunofluorescence detection of cell samples. ELISA(peptide): For ELISA detection of antigenic peptide.

Pig(100%), Bovine(100%), Horse(100%), Sheep(100%), Rabbit(100%), Dog(100%)
Phospho-NF kappaB p100/p52 (Ser872) Antibody detects endogenous levels of NF kappaB p100/p52 only when phosphorylated at Serine 872.
Cite Format: Affinity Biosciences Cat# AF3375, RRID:AB_2834806.
The antibody is from purified rabbit serum by affinity purification via sequential chromatography on phospho-peptide and non-phospho-peptide affinity columns.
Rabbit IgG in phosphate buffered saline , pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol. Store at -20 °C. Stable for 12 months from date of receipt.


CVID10; DNA binding factor KBF2; H2TF1; Lymphocyte translocation chromosome 10 protein; LYT 10; NF kB2; NFKB p52/p100 subunit; Nuclear factor Kappa B subunit 2; Nuclear factor of kappa light polypeptide gene enhancer in B cells 2 (p49/p100); Nuclear factor of kappa light polypeptide gene enhancer in B cells 2; Oncogene Lyt 10; p100; Transcription factor NFKB2;


NFkB-p100 a transcription factor of the nuclear factor-kappaB ( NFkB) group. Precursor of the p52 subunit of the nuclear factor NF-kappa-B, which 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.



Score>80(red) has high confidence and is suggested to be used for WB detection. *The prediction model is mainly based on the alignment of immunogen sequences, the results are for reference only, not as the basis of quality assurance.

Model Confidence:
High(score>80) Medium(80>score>50) Low(score<50) No confidence

PTMs - Q00653 As Substrate

Site PTM Type Enzyme
K19 Sumoylation
S22 Phosphorylation
S23 Phosphorylation
K28 Ubiquitination
K47 Ubiquitination
Y55 Phosphorylation
K72 Ubiquitination
K90 Sumoylation
T97 Phosphorylation
S99 Phosphorylation O15111 (CHUK)
S108 Phosphorylation O15111 (CHUK)
K112 Ubiquitination
S115 Phosphorylation O15111 (CHUK)
S123 Phosphorylation O15111 (CHUK)
K143 Ubiquitination
K144 Ubiquitination
K153 Ubiquitination
S161 Phosphorylation
T167 Phosphorylation
K179 Ubiquitination
S204 Phosphorylation
S222 Phosphorylation P49841 (GSK3B)
K229 Ubiquitination
K235 Ubiquitination
K252 Ubiquitination
S277 Phosphorylation
Y285 Phosphorylation
K298 Sumoylation
K321 Ubiquitination
Y325 Phosphorylation
Y326 Phosphorylation
K332 Ubiquitination
T429 Phosphorylation
T651 Phosphorylation
T655 Phosphorylation
T682 Phosphorylation
K689 Sumoylation
S707 Phosphorylation P49841 (GSK3B)
S711 Phosphorylation P49841 (GSK3B)
S713 Phosphorylation
S715 Phosphorylation
S717 Phosphorylation
S727 Phosphorylation
S739 Phosphorylation
K741 Ubiquitination
K743 Ubiquitination
S762 Phosphorylation
S802 Phosphorylation
S812 Phosphorylation
K855 Ubiquitination
S858 Phosphorylation
T859 Phosphorylation
K863 Sumoylation
S866 Phosphorylation Q99558 (MAP3K14)
Y868 Phosphorylation
S870 Phosphorylation Q99558 (MAP3K14)
S872 Phosphorylation O15111 (CHUK)

Research Backgrounds


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. 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. In a non-canonical activation pathway, the MAP3K14-activated CHUK/IKKA homodimer phosphorylates NFKB2/p100 associated with RelB, inducing its proteolytic processing to NFKB2/p52 and the formation of NF-kappa-B RelB-p52 complexes. The NF-kappa-B heterodimeric RelB-p52 complex is a transcriptional activator. The NF-kappa-B p52-p52 homodimer is a transcriptional repressor. NFKB2 appears to have dual functions such as cytoplasmic retention of attached NF-kappa-B proteins by p100 and generation of p52 by a cotranslational processing. The proteasome-mediated process ensures the production of both p52 and p100 and preserves their independent function. p52 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. p52 and p100 are respectively the minor and major form; the processing of p100 being relatively poor. Isoform p49 is a subunit of the NF-kappa-B protein complex, which stimulates the HIV enhancer in synergy with p65. In concert with RELB, regulates the circadian clock by repressing the transcriptional activator activity of the CLOCK-ARNTL/BMAL1 heterodimer.


While translation occurs, the particular unfolded structure after the GRR repeat promotes the generation of p52 making it an acceptable substrate for the proteasome. This process is known as cotranslational processing. The processed form is active and the unprocessed form acts as an inhibitor (I kappa B-like), being able to form cytosolic complexes with NF-kappa B, trapping it in the cytoplasm. Complete folding of the region downstream of the GRR repeat precludes processing.

Subsequent to MAP3K14-dependent serine phosphorylation, p100 polyubiquitination occurs then triggering its proteasome-dependent processing.

Constitutive processing is tightly suppressed by its C-terminal processing inhibitory domain, named PID, which contains the death domain.

Subcellular Location:

Nucleus. Cytoplasm.
Note: Nuclear, but also found in the cytoplasm in an inactive form complexed to an inhibitor (I-kappa-B).

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionSubcellular location
Subunit Structure:

Component of the NF-kappa-B RelB-p52 complex. Homodimer; component of the NF-kappa-B p52-p52 complex. Component of the NF-kappa-B p65-p52 complex. Component of the NF-kappa-B p52-c-Rel complex. NFKB2/p52 interacts with NFKBIE. Component of a complex consisting of the NF-kappa-B p50-p50 homodimer and BCL3. Directly interacts with MEN1.


The C-terminus of p100 might be involved in cytoplasmic retention, inhibition of DNA-binding by p52 homodimers, and/or transcription activation.

The glycine-rich region (GRR) appears to be a critical element in the generation of p52.

Research Fields

· Environmental Information Processing > Signal transduction > MAPK signaling pathway.   (View pathway)

· Environmental Information Processing > Signal transduction > NF-kappa B signaling pathway.   (View pathway)

· Human Diseases > Infectious diseases: Bacterial > Legionellosis.

· Human Diseases > Infectious diseases: Viral > HTLV-I infection.

· Human Diseases > Infectious diseases: Viral > Epstein-Barr virus infection.

· Human Diseases > Cancers: Overview > Pathways in cancer.   (View pathway)

· Human Diseases > Cancers: Overview > Viral carcinogenesis.

· Human Diseases > Cancers: Specific types > Breast cancer.   (View pathway)

· Organismal Systems > Development > Osteoclast differentiation.   (View pathway)

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