Prokaryotic nucleotide excision repair.

Prokaryotic nucleotide excision repair.
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DOI:
10.1101/cshperspect.a012591
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发表时间:
2013-03-01
影响因子:
7.2
通讯作者:
Van Houten B
Van Houten B
中科院分区:
生物学1区
文献类型:
--
作者:
Kisker C;Kuper J;Van Houten B

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核苷酸切除修复(NER)允许细菌在全球许多不同的利基环境中蓬勃发展,这对它们的遗传物质造成了严重的环境破坏。NER之所以引人注目,是因为它的底物种类繁多,在化学成分和结构上存在很大差异。结构生物学和单分子研究的最新进展使人们对NER组分的结构和功能有了更深入的了解。这组蛋白质通过一个多步骤的过程协调了有毒DNA损伤的忠实移除。通过动态探测DNA结构来识别受损的核苷酸,然后对DNA结构进行验证和标记,然后切除受损的核苷酸和周围的核苷酸。相反的DNA链作为修复的模板,在重新合成和连接后完成。
Nucleotide excision repair (NER) has allowed bacteria to flourish in many different niches around the globe that inflict harsh environmental damage to their genetic material. NER is remarkable because of its diverse substrate repertoire, which differs greatly in chemical composition and structure. Recent advances in structural biology and single-molecule studies have given great insight into the structure and function of NER components. This ensemble of proteins orchestrates faithful removal of toxic DNA lesions through a multistep process. The damaged nucleotide is recognized by dynamic probing of the DNA structure that is then verified and marked for dual incisions followed by excision of the damage and surrounding nucleotides. The opposite DNA strand serves as a template for repair, which is completed after resynthesis and ligation.
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发表时间: 2006-01-27
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