Suppr超能文献

来自藤黄微球菌的对紫外线照射的脱氧核糖核酸具有活性的核酸内切酶:纯化及性质

Endonuclease from Micrococcus luteus which has activity toward ultraviolet-irradiated deoxyribonucleic acid: purification and properties.

作者信息

Carrier W L, Setlow R B

出版信息

J Bacteriol. 1970 Apr;102(1):178-86. doi: 10.1128/jb.102.1.178-186.1970.

Abstract

An endonuclease purified approximately 3,200-fold from Micrococcus luteus is active on native ultraviolet-irradiated deoxyribonucleic acid (DNA), but is inactive on unirradiated native or denatured DNA and has no activity toward irradiated denatured DNA. The major type of lesion for the nucleolytic activity is the cyclobutane pyrimidine dimer. The enzyme makes a number of single-strand breaks approximately equal to the number of dimers, but dimers are not excised. This endonuclease-a small molecular weight protein-therefore has all the attributes hypothesized for the first enzyme in the sequential steps in repair of DNA in vivo. Another paper shows that the endonuclease is able to reactivate ultraviolet-irradiated transforming DNA.

摘要

一种从藤黄微球菌中纯化出来、纯化倍数约为3200倍的核酸内切酶,对天然的紫外线照射的脱氧核糖核酸(DNA)有活性,但对未照射的天然或变性DNA无活性,且对照射过的变性DNA也没有活性。核酸水解活性的主要损伤类型是环丁烷嘧啶二聚体。该酶产生的单链断裂数量与二聚体数量大致相等,但二聚体并未被切除。因此,这种核酸内切酶——一种小分子量蛋白质——具有体内DNA修复连续步骤中第一种酶所假设的所有特性。另一篇论文表明,该核酸内切酶能够使紫外线照射的转化DNA重新激活。

相似文献

引用本文的文献

本文引用的文献

9
Cyclobutane-type pyrimidine dimers in polynucleotides.多核苷酸中的环丁烷型嘧啶二聚体。
Science. 1966 Jul 22;153(3734):379-86. doi: 10.1126/science.153.3734.379.
10
The chemical nature of photoreactivable lesions in DNA.DNA中光可修复损伤的化学性质。
Proc Natl Acad Sci U S A. 1965 Jun;53(6):1430-6. doi: 10.1073/pnas.53.6.1430.

文献检索

告别复杂PubMed语法,用中文像聊天一样搜索,搜遍4000万医学文献。AI智能推荐,让科研检索更轻松。

立即免费搜索

文件翻译

保留排版,准确专业,支持PDF/Word/PPT等文件格式,支持 12+语言互译。

免费翻译文档

深度研究

AI帮你快速写综述,25分钟生成高质量综述,智能提取关键信息,辅助科研写作。

立即免费体验