SignalSilence? PARP siRNA I

• 产品编号：CST-6304S      品牌：CST       原厂货号：6304S
• 产品分类：DNA和RNA纯化 > RNA干扰 > RNAi Oligos > siRNA
• 应用分类：

描述：

SignalSilence^® PARP siRNA II能够抑制人、小鼠、大鼠和猴的PARP的表达。CST公司的 SignalSilence ® PARP siRNA I产品能够满足研究者通过RNA干扰方式特异性抑制PARP基因表达的需求，这种方法通过将双链RNA分子释放到细胞内来实现基因表达的选择性沉默。所有CST的SignalSilence ® siRNA产品都是经过严格的内部测试，并已通过western方法证明了目标蛋白表达量的降低。通过三苯甲基分析每个碱基以监测寡核苷酸的合成，确保合适的配对效率。随后寡核苷酸通过亲和固相萃取法纯化。退火的RNA双链通过质谱分析来证实其精确的组成。每一批产品都通过质谱分析与前面的产品进行比较，来保证不同批次之间的最大一致性。 CST 建议使用100 nM SignalSilence® PARP siRNA I进行转染48至72小时，之后裂解细胞。转染程序按相应转染试剂制造商提供的试验流程进行。使用过程中有任何问题，请随时联系CST。参与环境胁迫应答中的DNA修复(1)。在体外该蛋白可被许多ICE样 caspases裂解(2,3)，在体内是caspase-3裂解的主要靶蛋白之一(4,5)。在人体中PARP在位点Asp214 和 Gly215被裂解，裂解后PARR的N末端DNA 结合结构域(24 kDa)与C端催化结构域(89 kDa) 分离(2,4)。PARP协助细胞维持生存能力；PARP的裂解促进细胞崩解并可以作为细胞凋亡的标记物(6）。

1. Satoh, M.S. and Lindahl, T. (1992) Nature 356, 356-358.
2. Lazebnik, Y. A. et al. (1994) Nature 371, 346-347.
3. Cohen, G.M. (1997) Biochem. J. 326, 1-16.
4. Nicholson, D. W. et al. (1995) Nature 376, 37-43.
5. Tewari, M. et al. (1995) Cell 81, 801-809.
6. Oliver, F.J. et al. (1998) J. Biol. Chem. 273, 33533-33539.

原厂资料：

Homology

Species predicted to react based on 100% sequence homology: Mouse, Rat

Specificity / Sensitivity

PARP siRNA I will inhibit human, mouse and rat PARP expression.

Description

SignalSilence® PARP siRNA I from Cell Signaling Technology (CST) allows the researcher to specifically inhibit PARP expression using RNA interference, a method whereby gene expression can be selectively silenced through the delivery of double stranded RNA molecules into the cell. All SignalSilence® siRNA products from CST are rigorously tested in-house and have been shown to reduce target protein expression by western analysis.

Quality Control

Oligonucleotide synthesis is monitored base by base through trityl analysis to ensure appropriate coupling efficiency. The oligo is subsequently purified by affinity-solid phase extraction. The annealed RNA duplex is further analyzed by mass spectrometry to verify the exact composition of the duplex. Each lot is compared to the previous lot by mass spectrometry to ensure maximum lot-to-lot consistency.

Directions for Use

CST recommends transfection with 100 nM PARP siRNA I 48 to 72 hours prior to cell lysis. For transfection procedure, follow protocol provided by the transfection reagent manufacturer. Please feel free to contact CST with any questions on use. 

Background

PARP, a 116 kDa nuclear poly (ADP-ribose) polymerase, appears to be involved in DNA repair in response to environmental stress (1). This protein can be cleaved by many ICE-like caspases in vitro (2,3) and is one of the main cleavage targets of caspase-3 in vivo (4,5). In human PARP, the cleavage occurs between Asp214 and Gly215, which separates the PARP amino-terminal DNA binding domain (24 kDa) from the carboxy-terminal catalytic domain (89 kDa) (2,4). PARP helps cells to maintain their viability; cleavage of PARP facilitates cellular disassembly and serves as a marker of cells undergoing apoptosis (6). 

1. Satoh, M.S. and Lindahl, T. (1992) Nature 356, 356-358.
2. Lazebnik, Y. A. et al. (1994) Nature 371, 346-347.
3. Cohen, G.M. (1997) Biochem. J. 326, 1-16.
4. Nicholson, D. W. et al. (1995) Nature 376, 37-43.
5. Tewari, M. et al. (1995) Cell 81, 801-809.
6. Oliver, F.J. et al. (1998) J. Biol. Chem. 273, 33533-33539.

注意事项：

Storage: PARP siRNA I is supplied in RNAse-free water. Aliquot
and store at -20ºC.