核糖核酸酶A 来源于牛胰腺

3.1.27.5 ( BRENDA | IUBMB )

MFCD00132181

NA.54

RNase A(核糖核酸酶A)是一种内切核糖核酸酶，在嘧啶核苷酸后裂解单链RNA的磷酸二酯键。它可切割3′磷酸基末端(例如，pG-pG-pC-pA-pG将切割为pG-pG-pCp 和A-pG)。对单链RNA表现出最高活性。RNase A是含有四个二硫键的单链多肽。它与RNase B不同，并非糖蛋白。核糖核酸酶不会水解DNA，因为DNA缺乏形成环状中间体所必需的2′-OH基团。RNase A还可以水解蛋白质样品中的RNA。RNase A可被His12和His119的烷基化抑制并被钾盐和钠盐活化。RNAse在重金属离子存在时受到抑制。此外，RNase也被DNA竞争性抑制。
Ribonucleases do not hydrolyze DNA, because the DNA lacks 2′-OH groups essential for the formation of cyclic intermediates. RNase can hydrolyze RNA from protein samples. Pancreatic RNase A specifically cleaves at the 3′-side of pyrimidine (uracil or cytosine) phosphate bonds. The ribonuclease (RNase) gene is mapped to human chromosome 14.

Ribonuclease A is used to remove RNA from DNA plasmid preparations and protein samples. Ribonuclease A is used for RNase protection assays, to remove unspecifically bound RNA, analysis of RNA sequences, to hydrolyze RNA contained in protein samples, and the purification of DNA. Ribonuclease A from bovine pancreas has been used in a study to assess the mechanism of heavy metal ions on RNase activity. Ribonuclease A from bovine pancreas has also been used in a study to investigate the performance of oligomeric poly(diallyldimethylammonium chloride) as displacer for cation-exchange displacement chromatography of proteins.

• RNase A用于去除DNA质粒和基因组DNA制品和蛋白质样品中的RNA。
• RNase A还用于RNA序列分析和保护测定。
• RNase A已用作计算辅助药物设计的工具。
• RNase A为RNA序列分析提供支持。
• RNase A水解蛋白质样品中的RNA。
• RNase A为DNA纯化提供支持。

Ribonuclease A from bovine pancreas has been used to treat human glioblastoma U251 cell line prior to harvesting, for flow cytometry analysis, T suppressor cells and embryonic stem cell chromatin.

The structure of Ribonuclease A (RNase A) comprises of four disulfide and catalytic triad of two histidines crucial for its functionality. RNase A displays three-dimensional domain swapping of the α-helical N-terminal and the C-terminal β-strand. It can exist as dimer or oligomers. The level of RNase is elevated in cancers and infectious diseases. RNase A family of enzymes serve as potential drug targets. The homolog and variants of RNase A are potential chemotherapeutic agents.

我们高度稳定的核糖核酸酶A——RNase A，适合于RNA去除、RNA测序和DNA纯化。

0.2M 磷酸钠缓冲溶液，pH 6.4

R5503 的进一步色谱纯化得到的特纯 RNAse A

蛋白测定方法：E.
通过 SDS-PAGE 测定 RNase A 纯度

200

bovine pancreas

Type X-A

≥90% (SDS-PAGE)

buffered aqueous solution

≥70 Kunitz units/mg protein

~13,700

protease, essentially free

−20℃

GHS08

Danger

H334

P261 - P284 - P501

Resp. Sens. 1

12 - Non Combustible Liquids

WGK 2

Eyeshields, Gloves