PathScan? Acetyl-Histone H4 (Lys12) Sandwich ELISA Kit

• 产品编号：CST-7228S      品牌：CST       原厂货号：7228S
• 产品分类：ELISA及其它免疫分析 > ELISA > ELISA检测试剂盒
• 应用分类：

其它组分：

描述：

CST的 PathScan® Acetyl-Histone H4H4 (Lys12) Sandwich ELISA Kit #7228能够检测内源性Lys12位点乙酰化组蛋白H4的水平。如图1所示，使用乙酰化组蛋白H4 (Lys12) Sandwich ELISA Kit #7228可以检测到经TSA处理过的NIH/3T3细胞内高水平的Lys12位点乙酰化组蛋白H4。而Western 检测显示组蛋白H4总水平（乙酰化和非乙酰化）保持不变(图1)。当检测经TSA处理的COS和Jurkat细胞时也得到了类似的结果（数据未列出）。 经内部测试确认，本试剂盒可以检测到所列物种中的蛋白。但对其他物种中的同源蛋白可能也可以检测。PathScan® Acetyl-Histone H4 (Lys12) Sandwich ELISA Kit是通过固相夹心酶联免疫吸附法来检测内源性的Lys12位点乙酰化组蛋白H4水平的。先将组蛋白H4小鼠抗体包被在微孔板上。与细胞裂解物孵育后，组蛋白H4 (乙酰化和非乙酰化) 便可以被包被的抗体捕获。清洗彻底后，加入Acetyl-Histone H4 (Lys12) Antibody 检测组蛋白H4 Lys12位点的乙酰化。再加入Anti-Rabbit IgG, HRP偶联抗体来识别之前绑定的检测抗体。最后加入HRP底物—— TMB，进行显色。产生的吸光值与Lys12位点乙酰化组蛋白H4的数量成正比。试剂盒中抗体是专为本试剂盒特制的。染色质结构调整在真核生物的转录调控中扮演着一个重要角色。核小体是染色质的基本结构单位，由DNA缠绕八个核心组蛋白 (H2A、H2B、H3、H4各2个分子)组成(1)。核心组蛋白的氨基端尾部常发生多种翻译后修饰，包括乙酰化、磷酸化、甲基化和泛素化 (2-5)。这些修饰都是针对不同刺激而产生的反应，且会直接影响染色质对转录因子的可接近性，进而影响基因表达（6）。在多数物种中，组蛋白H2B 乙酰化主要发生在Lys5， 12， 15和20位点上 (4,7)。而组蛋白H3的乙酰化则主要发生在Lys9， 14， 18， 23， 27和56位点上。在一些生物体内，H3 Lys9位点的乙酰化修饰看似对组蛋白沉积和染色质组装有决定性的作用 (2,3)。组蛋白H3 Ser10、Ser28和Thr11位点上的磷酸化修饰与有丝分裂和减数分裂期间的染色体浓缩紧密相关(8-10)。组蛋白H3 Thr3位点上的磷酸化在许多物种中是高度保守的，由激酶haspin催化完成。在哺乳动物细胞内用磷酸化特异性抗体进行免疫染色，发现有丝分裂中H3 Thr3 位点的磷酸化发生在前期，而去磷酸化则发生在后期（11）。

1. Workman, J.L. and Kingston, R.E. (1998) Annu Rev Biochem 67, 545-79.
2. Hansen, J.C. et al. (1998) Biochemistry 37, 17637-41.
3. Strahl, B.D. and Allis, C.D. (2000) Nature 403, 41-5.
4. Cheung, P. et al. (2000) Cell 103, 263-71.
5. Bernstein, B.E. and Schreiber, S.L. (2002) Chem Biol 9, 1167-73.
6. Jaskelioff, M. and Peterson, C.L. (2003) Nat Cell Biol 5, 395-9.
7. Thorne, A.W. et al. (1990) Eur J Biochem 193, 701-13.
8. Hendzel, M.J. et al. (1997) Chromosoma 106, 348-60.
9. Goto, H. et al. (1999) J Biol Chem 274, 25543-9.
10. Preuss, U. et al. (2003) Nucleic Acids Res 31, 878-85.
11. Dai, J. et al. (2005) Genes Dev 19, 472-88.

原厂资料：

Specificity / Sensitivity

CST's PathScan® Acetyl-Histone H4 (Lys12) Sandwich ELISA Kit #7228 detects endogenous levels of histone H4 when acetylated at Lys12. As shown in Figure 1 using the Acetyl-Histone H4 (Lys12) Sandwich ELISA Kit #7228, a high level of acetylation at Lys12 on histone H4 is detected in NIH/3T3 cells when treated with TSA. The level of total histone H4 (acetylated and non-acetylated) remains unchanged as shown by Western analysis (Figure 1). Similar results are obtained when COS and Jurkat cells are treated with TSA (data not shown). This kit detects proteins from the indicated species, as determined through in-house testing, but may also detect homologous proteins from other species.

Description

The PathScan® Acetyl-Histone H4 (Lys12) Sandwich ELISA Kit is a solid phase sandwich enzyme-linked immunosorbent assay (ELISA) that detects endogenous levels of histone H4 when acetylated at lysine 12. A histone H4 mouse antibody has been coated onto the microwells. After incubation with cell lysates, histone H4 protein (acetylated and non-acetylated) is captured by the coated antibody. Following extensive washing, Acetyl-histone H4 (Lys12) rabbit antibody is added to detect acetylated Lys12 on the histone H4 protein. Anti-rabbit IgG, HRP-linked Antibody is then used to recognize the bound detection antibody. HRP substrate, TMB, is added to develop color. The magnitude of the absorbance for this developed color is proportional to the quantity of histone H4 acetylated at Lys12. 
 Antibodies in kit are custom formulations specific to kit.

Background

Modulation of chromatin structure plays an important role in the regulation of transcription in eukaryotes. The nucleosome, made up of DNA wound around eight core histone proteins (two each of H2A, H2B, H3, and H4), is the primary building block of chromatin (1). The amino-terminal tails of core histones undergo various post-translational modifications, including acetylation, phosphorylation, methylation, and ubiquitination (2-5). These modifications occur in response to various stimuli and have a direct effect on the accessibility of chromatin to transcription factors and, therefore, gene expression (6). In most species, histone H2B is primarily acetylated at Lys5, 12, 15, and 20 (4,7). Histone H3 is primarily acetylated at Lys9, 14, 18, 23, 27, and 56. Acetylation of H3 at Lys9 appears to have a dominant role in histone deposition and chromatin assembly in some organisms (2,3). Phosphorylation at Ser10, Ser28, and Thr11 of histone H3 is tightly correlated with chromosome condensation during both mitosis and meiosis (8-10). Phosphorylation at Thr3 of histone H3 is highly conserved among many species and is catalyzed by the kinase haspin. Immunostaining with phospho-specific antibodies in mammalian cells reveals mitotic phosphorylation at Thr3 of H3 in prophase and its dephosphorylation during anaphase (11).

1. Workman, J.L. and Kingston, R.E. (1998) Annu Rev Biochem 67, 545-79.
2. Hansen, J.C. et al. (1998) Biochemistry 37, 17637-41.
3. Strahl, B.D. and Allis, C.D. (2000) Nature 403, 41-5.
4. Cheung, P. et al. (2000) Cell 103, 263-71.
5. Bernstein, B.E. and Schreiber, S.L. (2002) Chem Biol 9, 1167-73.
6. Jaskelioff, M. and Peterson, C.L. (2003) Nat Cell Biol 5, 395-9.
7. Thorne, A.W. et al. (1990) Eur J Biochem 193, 701-13.
8. Hendzel, M.J. et al. (1997) Chromosoma 106, 348-60.
9. Goto, H. et al. (1999) J Biol Chem 274, 25543-9.
10. Preuss, U. et al. (2003) Nucleic Acids Res 31, 878-85.
11. Dai, J. et al. (2005) Genes Dev 19, 472-88.

注意事项：

* 12 8-well modules -Each module is designed to break apart for 8 tests.
**Kit should be stored at 4°C with the exception of 10X Cell Lysis Buffer, which is stored at –20°C (packaged separately).