Cell Signaling Technology

Product Pathways - Chromatin Regulation / Epigenetics

Acetyl-Histone H3 (Lys23) Antibody #8848

No. Size Price
8848S 100 µl ( 10 western blots ) ¥3,900.00 现货查询 购买询价
8848 carrier free & custom formulation / quantityemail request
Applications Dilution Species-Reactivity Sensitivity MW (kDa) Isotype
W 1:1000 Human,Mouse,Rat,Monkey, Endogenous 17 Rabbit

Species cross-reactivity is determined by western blot.

Applications Key: W=Western Blotting,

Specificity / Sensitivity

Acetyl-Histone H3 (Lys23) Antibody recognizes endogenous levels of histone H3 protein only when acetylated at Lys23. This antibody does not cross-react with histone H3 acetyl-lysine 9, 14, 18, 27, or 56.

Acetyl-Histone H3 (Lys23) Antibody检测仅在Lys23位点乙酰化的内源性histone H3蛋白。该抗体不能与acetyl-lysine 9、14、18、27或56位点的histone H3发生交叉反应。

Source / Purification

Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to residues surrounding acetyl-Lys23 of human histone H3 protein. Antibodies are purified by protein A and peptide affinity chromatography.

通过人工合成人源histone H3蛋白acetyl-Lys23周围相应的多肽片段去免疫动物从而制备出此多克隆抗体。通过蛋白A和多肽亲和层析纯化抗体获得。

Western Blotting

Western Blotting

Western blot analysis of extracts from HeLa and C2C12 cells, untreated or treated with Trichostatin A (TSA) #9950 (1 μM, 18 h), using Acetyl-Histone H3 (Lys23) Antibody (upper) and Histone H3 (D1H2) XP® Rabbit mAb #4499 (lower).

使用Acetyl-Histone H3 (Lys23) Antibody (上图)和Histone H3 (D1H2) XP® Rabbit mAb #4499 (下图),免疫印迹(Western blot)分析HeLa和C2C12细胞中Acetyl-Histone H3 (Lys23)和Histone H3蛋白水平,细胞分为未处理组或处理组:Trichostatin A #9950 (1 μM, 18 h)。



Acetyl-Histone H3 (Lys23) Antibody specificity was determined by peptide ELISA. The graph depicts the binding of the antibody to pre-coated acetyl-histone H3 (Lys23) peptide in the presence of increasing concentrations of various competitor peptides. As shown, only the acetyl-histone H3 (Lys23) peptide competed away binding of the antibody.

通过peptide ELISA确定Acetyl-Histone H3 (Lys23) Antibody的特异性。该图描述了抗体与提前包被的acetyl-histone H3 (Lys23) peptide的结合能力,并且多肽中含有浓度递增的不同竞争多肽。如同所示,仅acetyl-histone H3 (Lys23) peptide竞争脱离抗体的结合。


The nucleosome, made up of four core histone proteins (H2A, H2B, H3, and H4), is the primary building block of chromatin. Originally thought to function as a static scaffold for DNA packaging, histones have now been shown to be dynamic proteins, undergoing multiple types of post-translational modifications, including acetylation, phosphorylation, methylation, and ubiquitination (1,2). Histone acetylation occurs mainly on the amino-terminal tail domains of histones H2A (Lys5), H2B (Lys5, 12, 15, and 20), H3 (Lys9, 14, 18, 23, 27, and 56), and H4 (Lys5, 8, 12, and 16) and is important for the regulation of histone deposition, transcriptional activation, DNA replication, recombination, and DNA repair (1-3). Hyper-acetylation of the histone tails neutralizes the positive charge of these domains and is believed to weaken histone-DNA and nucleosome-nucleosome interactions, thereby destabilizing chromatin structure and increasing the accessibility of DNA to various DNA-binding proteins (4,5). In addition, acetylation of specific lysine residues creates docking sites for a protein module called the bromodomain, which binds to acetylated lysine residues (6). Many transcription and chromatin regulatory proteins contain bromodomains and may be recruited to gene promoters, in part, through binding of acetylated histone tails. Histone acetylation is mediated by histone acetyltransferases (HATs), such as CBP/p300, GCN5L2, PCAF, and Tip60, which are recruited to genes by DNA-bound protein factors to facilitate transcriptional activation (3). Deacetylation, which is mediated by histone deacetylases (HDAC and sirtuin proteins), reverses the effects of acetylation and generally facilitates transcriptional repression (7,8).

核小体是由四种中心组蛋白(H2A、H2B、H3和H4)组成,它是染色质的主要构件模块。起初被认为是一个DNA包装的静态支架,目前组蛋白已经被认为是一个动态蛋白,其经历多种形式的翻译后修饰,包括乙酰化作用、磷酸化作用、甲基化作用和泛素化作用(1,2)。组蛋白乙酰化作用主要发生在histones H2A (Lys5)、H2B (Lys5, 12, 15, and 20)、H3 (Lys9, 14, 18, 23, 27, and 56)和H4 (Lys5, 8, 12, and 16)的氨基端尾部结构域,并且对于组蛋白沉积、转录激活、DNA复制、重组和DNA修复有着重要作用(1-3)。组蛋白尾部的高度乙酰化中和了这些区域的正电荷,并且被认为弱化了组蛋白-DNA和核小体-核小体的相互作用,因此使核染色质不稳定以及增加了DNA与不同的DNA结合蛋白的接近程度(4,5)。此外,特定的赖氨酸残基乙酰化产生了停留点,这些位置有助于招募包含一个bromodomain蛋白,该区域能结合到乙酰化的赖氨酸残基(6)。许多转录和染色质调节蛋白包含bromodomains,并且可能被招募到基因启动子,在某种程度上通过乙酰化的组蛋白尾部结合。组蛋白乙酰化通过组蛋白乙酰化转移酶(HATs)介导,例如CBP/p300、GCN5L2、PCAF和Tip60,这些通过DNA结合蛋白因子招募到基因上从而有助于转录激活(3)。去乙酰化作用通过组蛋白去乙酰转移酶(HDAC和Sirtuin蛋白)介导,这将逆转乙酰化的影响,并且有助于转录抑制(7,8)。

  1. Peterson, C.L. and Laniel, M.A. (2004) Curr Biol 14, R546-51.
  2. Jaskelioff, M. and Peterson, C.L. (2003) Nat Cell Biol 5, 395-9.
  3. Roth, S.Y. et al. (2001) Annu Rev Biochem 70, 81-120.
  4. Workman, J.L. and Kingston, R.E. (1998) Annu Rev Biochem 67, 545-79.
  5. Hansen, J.C. et al. (1998) Biochemistry 37, 17637-41.
  6. Yang, X.J. (2004) Bioessays 26, 1076-87.
  7. Haberland, M. et al. (2009) Nat Rev Genet 10, 32-42.
  8. Haigis, M.C. and Sinclair, D.A. (2010) Annu Rev Pathol 5, 253-95.

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