Cell Signaling Technology

Product Pathways - NF-kB Signaling

Phospho-NF-κB p65 (Ser536) (7F1) Mouse mAb #3036

Applications Reactivity Sensitivity MW (kDa) Isotype
W H M R Mk Mi (Dg) Endogenous 65 Mouse IgG2b

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

Protocols

Specificity / Sensitivity

Phospho-NF-kappaB p65 (Ser536) (7F1) Mouse mAb detects NF-kappaB p65 only when phosphorylated at serine 536. It does not cross-react with the p50 subunit or other related proteins.

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Ser536 of human NF-kappaB p65.

Western Blotting

Western Blotting

Western blot analysis of extracts from HeLa cells, untreated or TNF-alpha-treated (#2169, 20ng/ml), using Phospho-NF-kappaB p65 (Ser536) (7F1) Mouse mAb (upper) or NF-kappaB p65 Antibody #3034 (lower).

Background

Transcription factors of the nuclear factor κ B (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 the ubiquitin-proteasome pathway and releasing NF-κB to enter the nucleus where it regulates gene expression (6-8). NIK and IKKα (IKK1) regulate the phosphorylation and processing of NF-κB2 (p100) to produce p52, which translocates 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.

Application References

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Companion Products

For Research Use Only. Not For Use In Diagnostic Procedures.

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