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Structure and Function of the Small MutS-Related Domain

机译:小MutS相关域的结构和功能

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摘要

MutS family proteins are widely distributed in almost all organisms from bacteria to human and play central roles in various DNA transactions such as DNA mismatch repair and recombinational events. The small MutS-related (Smr) domain was originally found in the C-terminal domain of an antirecombination protein, MutS2, a member of the MutS family. MutS2 is thought to suppress homologous recombination by endonucleolytic resolution of early intermediates in the process. The endonuclease activity of MutS2 is derived from the Smr domain. Interestingly, sequences homologous to the Smr domain are abundant in a variety of proteins other than MutS2 and can be classified into 3 subfamilies. Recently, the tertiary structures and endonuclease activities of all 3 Smr subfamilies were reported. In this paper, we review the biochemical characteristics and structures of the Smr domains as well as cellular functions of the Smr-containing proteins.
机译:MutS家族蛋白广泛分布于从细菌到人类的几乎所有生物体中,并在各种DNA交易(例如DNA错配修复和重组事件)中发挥核心作用。小MutS相关(Smr)域最初是在抗重组蛋白MutS2(MutS家族成员)的C端结构域中发现的。人们认为MutS2通过在此过程中对早期中间体进行内切核酸水解来抑制同源重组。 MutS2的核酸内切酶活性源自Smr结构域。有趣的是,与Smr结构域同源的序列在MutS2以外的各种蛋白质中都丰富,可以分为3个亚家族。最近,报道了所有3个Smr亚家族的三级结构和核酸内切酶活性。在本文中,我们综述了Smr结构域的生化特征和结构以及含Smr的蛋白质的细胞功能。

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