Recent advances in the structural mechanisms of DNA glycosylases.

Recent advances in the structural mechanisms of DNA glycosylases.
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DOI:
10.1016/j.bbapap.2012.10.005
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发表时间:
2013-01
影响因子:
3.2
通讯作者:
Eichman, Brandt F.
Eichman, Brandt F.
中科院分区:
生物学3区
文献类型:
--
作者:
Brooks, Sonja C.;Adhikary, Suraj;Rubinson, Emily H.;Eichman, Brandt F.

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DNA糖基化酶通过定位和切除由DNA的氧化、烷基化和脱氨产生的各种异常核碱基来保护基因组。自从28年前发现这些酶采用碱基翻转机制来捕获其底物以来,已经确定了六种不同的蛋白质结构来执行相同的基本任务。过去几年的工作已经揭示了各种DNA糖基化酶如何调查DNA,检测双链体内的损伤,选择正确的修饰和催化碱基切除的细节。在这里,我们提供了一个广泛的概述,从结构酶学收集的糖基化酶机制的这些最新进展,突出所有糖基化酶的共同特点,以及定义其特定的底物特异性的关键差异。
DNA glycosylases safeguard the genome by locating and excising a diverse array of aberrant nucleobases created from oxidation, alkylation, and deamination of DNA. Since the discovery 28 years ago that these enzymes employ a base flipping mechanism to trap their substrates, six different protein architectures have been identified to perform the same basic task. Work over the past several years has unraveled details for how the various DNA glycosylases survey DNA, detect damage within the duplex, select for the correct modification, and catalyze base excision. Here, we provide a broad overview of these latest advances in glycosylase mechanisms gleaned from structural enzymology, highlighting features common to all glycosylases as well as key differences that define their particular substrate specificities.
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影响因子: 64.8
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