Scaffolding for Repair: Understanding Molecular Functions of the SMC5/6 Complex.

Scaffolding for Repair: Understanding Molecular Functions of the SMC5/6 Complex.
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DOI:
10.3390/genes9010036
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发表时间:
2018-01-12
期刊:
影响因子:
3.5
通讯作者:
Pecinka A
Pecinka A
中科院分区:
生物学3区
文献类型:
--
作者:
Diaz M;Pecinka A

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染色体的组织、动力学和稳定性是细胞成功传代和遗传信息传递给后代所必需的。所涉及的关键组分是染色体结构维持(SMC)复合物。粘着蛋白复合体确保正确的染色单体排列,凝聚蛋白复合体染色体凝聚,SMC 5/6复合体专门用于维持基因组稳定性。本文就SMC 5/6复合物的组成和分子功能作一综述。SMC 5/6复合体最初是基于其突变体对遗传毒性胁迫的敏感性而鉴定的,但越来越多的研究表明其在控制DNA复制、姐妹染色单体分辨和基因组位置依赖性促进或抑制同源重组中的作用。这些功能中的一些似乎是由于与粘附素或其他修复复合物的非常动态的相互作用。在拟南芥中的研究表明,除了修复受损DNA的典型功能外,SMC 5/6复合物在调节植物发育、非生物胁迫反应、抑制自身免疫反应和有性生殖中起重要作用。
Chromosome organization, dynamics and stability are required for successful passage through cellular generations and transmission of genetic information to offspring. The key components involved are Structural maintenance of chromosomes (SMC) complexes. Cohesin complex ensures proper chromatid alignment, condensin complex chromosome condensation and the SMC5/6 complex is specialized in the maintenance of genome stability. Here we summarize recent knowledge on the composition and molecular functions of SMC5/6 complex. SMC5/6 complex was originally identified based on the sensitivity of its mutants to genotoxic stress but there is increasing number of studies demonstrating its roles in the control of DNA replication, sister chromatid resolution and genomic location-dependent promotion or suppression of homologous recombination. Some of these functions appear to be due to a very dynamic interaction with cohesin or other repair complexes. Studies in Arabidopsis indicate that, besides its canonical function in repair of damaged DNA, the SMC5/6 complex plays important roles in regulating plant development, abiotic stress responses, suppression of autoimmune responses and sexual reproduction.
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