Cell Signaling Technology

Product Pathways - Chromatin Regulation / Epigenetics

CtBP2 Antibody #13256

No. Size Price
13256S 100 µl ( 10 western blots ) ¥3,250.00 现货查询 购买询价 防伪查询
13256 carrier free & custom formulation / quantityemail request
Applications Dilution Species-Reactivity Sensitivity MW (kDa) Isotype
W 1:1000 Human,Mouse,Rat,Monkey, Endogenous 47 Rabbit
IP 1:50

Species cross-reactivity is determined by western blot.

Applications Key: W=Western Blotting, IP=Immunoprecipitation,


Species predicted to react based on 100% sequence homology: Bovine, Dog, Guinea Pig,

Specificity / Sensitivity

CtBP2 Antibody recognizes endogenous levels of total CtBP2 protein. This antibody does not cross-react with the CtBP1 protein.


Source / Purification

Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to residues near the carboxy terminus of human CtBP2 protein. Antibodies are purified by protein A and peptide affinity chromatography.


Western Blotting

Western Blotting

Western blot analysis of extracts from various cell lines using CtBP2 Antibody.

使用CtBP2抗体对多种细胞提取物进行western blot分析。



Immunoprecipitation of CtBP2 from HeLa cell extracts using Normal Rabbit IgG #2729 (lane 2) or CtBP2 Antibody (lane 3). Lane 1 is 10% input. Western blot analysis was performed using CtBP2 Antibody.

使用Normal Rabbit IgG #2729 (lane 2) 或 CtBP2 抗体 (lane 3)对HeLa细胞提取物中的CtBP2蛋白进行免疫沉淀实验。Lane1 是10%上样量。使用CtBP2抗体进行western blot分析。


CtBP2 (carboxy-terminal binding protein-2) and its homolog CtBP1 are transcriptional co-repressors originally identified as proteins that bind the carboxy-terminus of the human adenovirus E1A protein (1-3). CtBP proteins are thought to play important roles in regulating various developmental pathways because deletion of CtBP2 leads to embryonic lethality at E10.5 and is correlated with axial patterning defects (4). CtBP proteins regulate various oncogenic signaling pathways as promoters of epithelial-mesenchymal transition, apoptosis antagonists, and tumor suppressor genes repressors (1,5). The CtBP protein transcription co-repression activity results from interactions with numerous transcription factors and chromatin modulators, including the polycomb group proteins (1,6,7). Depending on the context, CtBP proteins interact with a short amino acid sequence motif (PXDLS) to mediate repression of target genes through both histone deacetylase-dependent and independent mechanisms (6,8,9). CtBP proteins display a high sequence homology to the bacterial D-isomer-specific 2-hydroxyacid dehydrogenase enzymes. Research studies indicate that nuclear NADH levels regulate CtBP transcription repression activities, as NADH binding is required for CtBP2 homodimerization and transcription co-repressor activity (6,9-11).

CtBP2 (carboxy-terminal binding protein-2)和同源蛋白CtBP1是转录共抑制因子,最初因其能与人腺病毒E1A蛋白的羧基末端结合而被发现(1-3)。CtBP蛋白被认为在调控多条信号通路过程中发挥了重要作用,因为敲除CtBP2会导致E10.5的胚胎致死,以及和轴向发育模式缺陷相关(4)。CtBP蛋白调控多种肿瘤信号通路作为上皮-间质转换的启动子,细胞凋亡拮抗剂和肿瘤抑制基因的抑制因子(1,5)。CtBP蛋白转录共抑制因子活性来自于和多种转录因子以及染色质调控子,包括聚梳家族蛋白(1,6,7)。CtBP蛋白与一个短的氨基酸序列基序(PXDLS)结合通过组蛋白去乙酰依赖和非依赖通路介导对靶基因的抑制效果(6,8,9)。CtBP蛋白与细菌D-isomer-specific 2-hydroxyacid dehydrogenase酶有高度序列同源性。研究表明核NAPDH水平调控CtBP转录抑制功能,因为NAPDH的结合对CtBP2的同二聚化和转录共抑制活性(6,9-11)。

  1. Chinnadurai, G. (2009) Cancer Res 69, 731-4.
  2. Boyd, J.M. et al. (1993) EMBO J 12, 469-78.
  3. Katsanis, N. and Fisher, E.M. (1998) Genomics 47, 294-9.
  4. Hildebrand, J.D. and Soriano, P. (2002) Mol Cell Biol 22, 5296-307.
  5. Battaglia, S. et al. (2010) Int J Cancer 126, 2511-9.
  6. Chinnadurai, G. (2002) Mol Cell 9, 213-24.
  7. Sewalt, R.G. et al. (1999) Mol Cell Biol 19, 777-87.
  8. Molloy, D.P. et al. (1998) J Biol Chem 273, 20867-76.
  9. Schaeper, U. et al. (1995) Proc Natl Acad Sci U S A 92, 10467-71.
  10. Kumar, V. et al. (2002) Mol Cell 10, 857-69.
  11. Thio, S.S. et al. (2004) Nucleic Acids Res 32, 1836-47.

Application References

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

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