Cell Signaling Technology

Product Pathways - NF-kappaB Signaling

Phospho-NF-κB2 p100 (Ser866/870) Antibody #4810

Applications Reactivity MW (kDa) Source
W IP H M (R) (B) (Dg) 110 Rabbit

Applications Key:  W=Western Blotting  IP=Immunoprecipitation
Reactivity Key:  H=Human  M=Mouse  R=Rat  B=Bovine  Dg=Dog
Species enclosed in parentheses are predicted to react based on 100% sequence homology. Species cross-reactivity is determined by Western blot.

Specificity / Sensitivity

Phospho-NF-κB2 p100 (Ser866/870) Antibody detects transfected NF-κB2 p100 when phosphorylated at serines 866 and 870.

Source / Purification

Polyclonal antibodies are produced by immunizing rabbits with a synthetic phospho peptide (Blue Carrier-coupled) corresponding to residues surrounding serines 866/870 of NF-κB2 p100. Nomenclature refers to the human sequence (SwissProt# Q00653). This site is homologous to rat Ser864/868 (Q5U2Z4) and mouse Ser865/869 (Q9WTK5). Antibodies are purified by protein A and peptide affinity chromatography.

Western Blotting

Western Blotting

Western blot analysis of extracts from HeLa cells transfected with wild-type or mutant NF-κB2 p100 (SS866/870AA) and with or without NIK, using Phospho-NF-κB2 p100 (Ser866/870) Antibody or total NF-κB2 p100 Antibody #4882. The p100 constructs were generously provided by Dr. Warner Greene of the Gladstone Institute of Virology and Immunology, Dr. Shao-Cong Sun of The Pennsylvania State University College of Medicine, and Dr. Gutian Xiao of Rutgers, The State University of New Jersey.

Background

Transcription factors of the nuclear factor kappaB (NF-κB)/Rel family play a pivotal role in inflammatory and immune responses (1,2). There are five family members in mammals: RelA, c-Rel, RelB, NF-κB1 (p105/p50) and NF-κB2 (p100/p52). Both p105 and p100 are proteolytically processed by the proteasome to produce p50 and p52, respectively. Rel proteins bind p50 and p52 to form dimeric complexes that bind DNA and regulate transcription. In unstimulated cells, NF-κB is sequestered in the cytoplasm by IκB inhibitory proteins (3-5). NF-κB-activating agents can induce the phosphorylation of IκB proteins, targeting them for rapid degradation through an ubiquitin-proteasome pathway and releasing NF-κB to enter the nucleus where it regulates gene expression (6-8). NIK and IKK-α (IKK1) regulate the phosphorylation and processing of NF-κB2 (p100) to produce p52, which is then translocated to the nucleus (9-11).

  1. Baeuerle, P.A. and Henkel, T. (1994) Annu Rev Immunol 12, 141-79.
  2. Baeuerle, P.A. and Baltimore, D. (1996) Cell 87, 13-20.
  3. Haskill, S. et al. (1991) Cell 65, 1281-9.
  4. Thompson, J.E. et al. (1995) Cell 80, 573-82.
  5. Whiteside, S.T. et al. (1997) EMBO J 16, 1413-26.
  6. Traenckner, E.B. et al. (1995) EMBO J 14, 2876-83.
  7. Scherer, D.C. et al. (1995) Proc Natl Acad Sci USA 92, 11259-63.
  8. Chen, Z.J. et al. (1996) Cell 84, 853-62.
  9. Senftleben, U. et al. (2001) Science 293, 1495-9.
  10. Coope, H.J. et al. (2002) EMBO J 21, 5375-85.
  11. Xiao, G. et al. (2001) Mol Cell 7, 401-9.

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