Cell Signaling Technology

Product Pathways - Nuclear Receptor Signaling

SRC-3 (5E11) Rabbit mAb #2126

ACTR   AIB1   Amplified in breast cancer-1 protein   CBP-interacting protein   NCoA-3   pCIP   RAC3   Receptor-associated coactivator 3   sc-9119   Thyroid hormone receptor activator molecule 1   TRAM-1  

No. Size Price
2126S 100 µl ( 10 western blots ) ¥3,250.00 现货查询 购买询价 防伪查询
2126 carrier free & custom formulation / quantityemail request
Applications Dilution Species-Reactivity Sensitivity MW (kDa) Isotype
W 1:1000 Human,Mouse,Rat,Monkey, Endogenous 160 Rabbit IgG
IP 1:50
ChIP 1:50

Species cross-reactivity is determined by western blot.

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

Specificity / Sensitivity

SRC-3 (5E11) Rabbit mAb detects endogenous levels of total SRC-3 protein (all isoforms). The antibody does not cross-react with other SRC proteins, including SRC-1 and SRC-2.

SRC-3 (5E11) Rabbit mAb检测内源性SRC-3总蛋白(所有三个亚型)。该抗体不能与其它SRC蛋白包括SRC-1和SRC-2发生相互作用。

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to the sequence of human SRC-3 protein.


Western Blotting

Western Blotting

Western blot analysis of cell lysates from A549, HeLa and Jurkat cells using SRC-3 (5E11) Rabbit mAb.

使用SRC-3 (5E11) Rabbit mAb兔单抗,免疫印迹(Western blot)分析A549、HeLa和Jurkat细胞中SRC-3 (5E11)蛋白水平。

Chromatin IP

Chromatin IP

Chromatin immunoprecipitations were performed with cross-linked chromatin from 4 x 106 MCF7 cells grown in phenol red free medium and 5% charcoal stripped FBS for 4 d then treated with β-estradiol (10 nM) for 45 minutes and either 5 μl of SRC-3 (5E11) Rabbit mAb or 2 μl of Normal Rabbit IgG #2729 using SimpleChIP® Enzymatic Chromatin IP Kit (Magnetic Beads) #9003. The enriched DNA was quantified by real-time PCR using SimpleChIP® Human CyclinD1 Promoter Primers #12531, human CTSD promoter primers, and SimpleChIP® Human α Satellite Repeat Primers #4486. The amount of immunoprecipitated DNA in each sample is represented as signal relative to the total amount of input chromatin, which is equivalent to one.


There are three members of the steroid receptor co-activator (SRC) family of proteins: SRC-1 (NCoA-1), SRC-2 (TIF2/GRIP1/NCoA-2) and SRC-3 (ACTR/pCIP/RAC3/TRAM-1/AIB1). The SRC family members all share significant structural homology and function in a similar fashion to stimulate transcription mediated by nuclear hormone receptors and other transcriptional activators such as STAT3, NF-κB, E2F1 and p53 (1-4). Two SRC proteins, SRC-1 and SRC-3, function as histone acetyltransferases (5,6). In addition, all three family members can recruit other histone acetyltransferases (CBP/p300, PCAF) and histone methyltransferases (PRMT1, CARM1) to target promoters and cooperate to enhance expression of many genes (5-8). The SRC proteins play important roles in multiple physiological processes including cell proliferation, cell survival, somatic cell growth, mammary gland development, female reproductive function and vasoprotection (9). SRC-1 and SRC-3 are conduits for kinase-mediated growth factor signaling to the estrogen receptor and other transcriptional activators. Seven SRC-1 phosphorylation sites and six SRC-3 phosphorylation sites have been identified, which are induced by steroids, cytokines and growth factors and involve multiple kinase signaling pathways (9-11). All three SRC family members are associated with increased activity of nuclear receptors in breast, prostate and ovarian carcinomas. In addition, SRC-3 is frequently amplified or over-expressed in a number of cancers (12), and SRC-1/PAX3 and SRC-2/MYST3 translocations are found associated with rhabdomyosarcoma and acute myeloid leukemia, respectively (13,14).

steroid receptor co-activator (SRC) 家族有三个成员蛋白:RC-1 (NCoA-1)、SRC-2 (TIF2/GRIP1/NCoA-2)和SRC-3 (ACTR/pCIP/RAC3/TRAM-1/AIB1)。所有SRC家族蛋白都有共同的结构同源性和功能,该功能是通过核激素受体和其他转录激活因子例如STAT3、NF-κB、E2F1和p53介导一个类似的方式去刺激转录(1-4)。两个SRC蛋白SRC-1和SRC-3都具有组蛋白乙酰转移酶的功能(5,6)。此外,所有的三个家族的蛋白都可以招募其他的组蛋白乙酰转移酶(CBP/p300, PCAF) 和组蛋白甲基转移酶(PRMT1, CARM1) 去定位到启动子并协助其增强许多基因的转录(5-8)。SRC蛋白在许多生理过程包括:细胞增殖,细胞存活,体细胞生长, 乳腺发育,雌性生殖功能以及血管保护中都起着重要作用(9)。SRC-1和SRC-3是激酶介导的生长因子信号传导到雌激素受体和其他转录激活因子的通道。7个SRC-1和6个SRC-3磷酸化位点已经被鉴定,这些位点的磷酸化由类固醇、细胞因子和生长因子所诱导,并且涉及到多个信号通路(9-11)。所有的3个SRC家族成员都与乳腺、前列腺和卵巢肿瘤核内受体的活性增加有关。此外,在多种癌症中SRC-3都频繁放大或过量表达(12),并且SRC-1/PAX3和SRC-2/MYST3的翻译分别与横纹肌肉瘤和急性髓细胞白血病有关联(13,14)。

  1. Giraud, S. et al. (2002) J. Biol. Chem. 277, 8004-8011.
  2. Na, S.Y. et al. (1998) J. Biol. Chem. 273, 10831-10834.
  3. Louie, M.C. et al. (2004) Mol. Cell Biol. 24, 5157-5171.
  4. Lee, S.K. et al. (1999) Mol. Endocrinol. 13, 1924-1933.
  5. Spencer, T.E. et al. (1997) Nature 389, 194-198.
  6. Chen, H. et al. (1997) Cell 90, 569-580.
  7. Koh, S.S. et al. (2001) J. Biol. Chem. 276, 1089-1098.
  8. Chen, D. et al. (1999) Science 284, 2174-2177.
  9. Wu, R.C. et al. (2004) Mol. Cell 15, 937-949.
  10. Rowan, B.G. et al. (2000) J. Biol. Chem. 275, 4475-4483.
  11. Zhou, H.J. et al. (2005) Cancer Res. 65, 7976-7983.
  12. Torres-Arzayus, M.I. et al. (2004) Cancer Cell 6, 263-274.
  13. Wachtel, M. et al. (2004) Cancer Res. 64, 5539-5545.
  14. Deguchi, K. et al. (2003) Cancer Cell 3, 259-271.

Application References

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

U.S. Patent No. 5,675,063.

Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.

Cell Signaling Technology® is a trademark of Cell Signaling Technology, Inc.

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