Single-stranded DNA-binding proteins: multiple domains for multiple functions.

Single-stranded DNA-binding proteins: multiple domains for multiple functions.
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DOI:
10.1016/j.str.2013.05.013
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发表时间:
2013-07-02
期刊:
影响因子:
5.7
通讯作者:
Wuttke, Deborah S.
Wuttke, Deborah S.
中科院分区:
生物学2区
文献类型:
--
作者:
Dickey, Thayne H.;Altschuler, Sarah E.;Wuttke, Deborah S.

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单链DNA (ssDNA)的识别是无数细胞功能的组成部分。在真核生物中,ssDNA稳定地存在于染色体末端和一些启动子元件上。此外,它是通过端粒合成、转录、DNA复制、重组和修复等几个细胞过程短暂形成的。为了协调这些不同的活动,各种蛋白质已经进化到以特定于其功能的方式结合ssDNA。在这里,我们通过分析与ssDNA复合物的蛋白质的高分辨率结构来回顾对ssDNA的识别。这种功能多样的蛋白质来源于一组有限的结构基序,这些结构基序可以被修饰和排列以实现不同的活性,包括一系列配体特异性。我们还研究了这些结构域在大型多结构域蛋白质/复合物中相互作用的方式。这些比较揭示了确定这些蛋白质所表现的功能范围的结构特征。
The recognition of single-stranded DNA (ssDNA) is integral to myriad cellular functions. In eukaryotes, ssDNA is present stably at the ends of chromosomes and at some promoter elements. Furthermore, it is formed transiently by several cellular processes including telomere synthesis, transcription, and DNA replication, recombination, and repair. To coordinate these diverse activities, a variety of proteins have evolved to bind ssDNA in a manner specific to their function. Here, we review the recognition of ssDNA through the analysis of high-resolution structures of proteins in complex with ssDNA. This functionally diverse set of proteins arises from a limited set of structural motifs that can be modified and arranged to achieve distinct activities, including a range of ligand specificities. We also investigate the ways in which these domains interact in the context of large multidomain proteins/complexes. These comparisons reveal the structural features that define the range of functions exhibited by these proteins.
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