Breaking and joining single-stranded DNA: the HUH endonuclease superfamily.

Breaking and joining single-stranded DNA: the HUH endonuclease superfamily.
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打破并连接单链的DNA:嗯,核酸内切酶超家族。

DOI:
10.1038/nrmicro3067
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发表时间:
2013-08
期刊:
Nature reviews. Microbiology
影响因子:
--
通讯作者:
Ton-Hoang B
Ton-Hoang B
中科院分区:
其他
文献类型:
--
作者:
Chandler M;de la Cruz F;Dyda F;Hickman AB;Moncalian G;Ton-Hoang B

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HUH核酸内切酶在生命的所有三个领域中数量众多且广泛存在。这些酶的主要功能是通过催化单链DNA的切割和重新连接来加工一系列移动的遗传元件,使用活性位点Tyr残基与DNA底物形成瞬时5′-磷酸酪氨酸键。这些酶在质粒和噬菌体的滚环复制、质粒转移、几种真核病毒的复制和各种类型的转座中具有关键作用。它们也被用于细胞过程,如内含子归巢和细菌重复的基因外回文的加工。在这里,我们提供了这些迷人的酶及其功能的概述,使用Rep蛋白,松弛酶和转座酶的良好特征的例子,我们探索在其不同的活动中使用的分子机制。
HUH endonucleases are numerous and widespread in all three domains of life. The major function of these enzymes is processing a range of mobile genetic elements by catalysing cleavage and rejoining of single-stranded DNA using an active-site Tyr residue to make a transient 5′-phosphotyrosine bond with the DNA substrate. These enzymes have a key role in rolling-circle replication of plasmids and bacteriophages, in plasmid transfer, in the replication of several eukaryotic viruses and in various types of transposition. They have also been appropriated for cellular processes such as intron homing and the processing of bacterial repeated extragenic palindromes. Here, we provide an overview of these fascinating enzymes and their functions, using well-characterized examples of Rep proteins, relaxases and transposases, and we explore the molecular mechanisms used in their diverse activities.
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影响因子: 5.6
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