Phospho-NF-κB p105 (Ser933) (18E6) Rabbit mAb

• 产品编号：CST-4806S      品牌：CST       原厂货号：4806S
• 产品分类：抗体 > 一抗 > 磷酸化抗体
• 应用分类：

描述：

Phospho-NF-κB p105 (Ser933) (18E6) Rabbit mAb 只能检测内源的在ser933位点磷酸化的p105 NF-κB。此单克隆抗体是通过合成对应的NF-kappaB p105 Ser933位点周围的磷肽段来免疫动物而获得。核因子κ B(NF-κB)/Rel 家族的转录调控因子在炎症反应和免疫反应中发挥了至关重要的作用(1,2)。在哺乳动物中一共有5个家族成员: RelA, c-Rel, RelB, NF-κB1 (p105/p50) 和 NF-κB2 (p100/p52)。 p105 和 p100 在蛋白水解酶的作用下分别形成p50 和 p52。Rel与p50和p52形成二聚体，此复合体能够结合到DNA上调控转录。在未刺激的状态下， NF-κB 在IκB抑制剂作用下在细胞质中处于非活性状态(3-5)。 NF-κB激活因子能够诱导 IκB 蛋白的磷酸化, 这就使IκB能够快速的经过泛素化-蛋白酶通路降解从而释放 NF-κB，激活的NF-κB入核调控基因的表达(6-8)。 NIK 和 IKKα (IKK1) 调节磷酸化并促使NF-κB2 (p100) 生成p52, p52之后会入核发挥功能(9-11)。在IKK介导的p105 NF-kappaB C-末端多位点(Ser921, 923, 927 和 933)的磷酸化后，SCF beta-TrCP介导产生了50 kDa 蛋白的活性形式p50 (12,13)。

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.
12. Heissmeyer, V. et al. (2001) Mol. Cell. Biol. 21, 1024-1035.
13. Orian, A. et al. (2000) EMBO J. 19, 2580-2591.

原厂资料：

Specificity / Sensitivity

Phospho-NF-κB p105 (Ser933) (18E6) Rabbit mAb detects endogenous levels of p105NF-κB only when phosphorylated at serine 933.

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic phosphopeptide corresponding to amino acids around Ser933 of NF-κB p105.

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 is then translocated to the nucleus (9-11).Following IKK-mediated phosphorylation of p105 NF-κB at multiple sites (Ser921, 923, 927, and 933) on its carboxy-terminus, SCFbeta-TrCP mediated processing produces the 50kDa active form p50 (12,13).

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.
12. Heissmeyer, V. et al. (2001) Mol. Cell. Biol. 21, 1024-1035.
13. Orian, A. et al. (2000) EMBO J. 19, 2580-2591.

注意事项：

Storage: Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM
NaCl, 100 µg/ml BSA and 50% glycerol. Store at –20°C.
Do not aliquot the antibody.