核糖核酸酶A 来源于牛胰腺，250MG，R5250-250MG，Sigma

General description

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.
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**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。

Application

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.

• 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。

Biochem/physiol Actions

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.

Features and Benefits

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。

Physical form

0.2M 磷酸钠缓冲溶液，pH 6.4

Preparation Note

R5503 的进一步色谱纯化得到的特纯 RNAse A

Analysis Note

蛋白测定方法：E.
通过 SDS-PAGE 测定 RNase A 纯度