DNA polymerase 5 acetylation by Eso1 is essential for Schizosaccharomyces pombe viability.

DNA polymerase 5 acetylation by Eso1 is essential for Schizosaccharomyces pombe viability.
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Eso1 的 DNA 聚合酶 5 乙酰化对于粟酒裂殖酵母的生存至关重要。

DOI:
10.3892/ijmm.2017.3192
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发表时间:
2017-12
期刊:
Int J Mol Med
影响因子:
--
通讯作者:
Sun Liankun
Sun Liankun
中科院分区:
其他
文献类型:
--
作者:
Chen Zhiming;Cao Hongshi;Lu Yingqiang;Ren Qiang;Sun Liankun

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Eco1/Eso1蛋白在染色体分离、DNA修复和基因调控中起重要作用。Eco1突变在临床上诱发Roberts综合征,在体内诱发rDNA转录紊乱。在这项研究中,我们研究了Eso1蛋白与聚合酶5 (Pol5)的结合以及Pol5蛋白的乙酰化在调节pombe Schizosaccharomyces (S. pombe)生存能力中的作用。免疫沉淀和质谱分析鉴定出Eso1蛋白与Cdc2、Pol5和Cdc21以及其他蛋白结合。Pol5蛋白与Eso1蛋白特异性结合,但不与Eco1蛋白的Rad30部分或Rad30部分外加锌指结构域结合。质谱数据进一步确定了Pol5蛋白赖氨酸残基中的几个乙酰化或三甲基化修饰位点。然而,pol5k47位点的精氨酸突变对S. pombe是致命的。Eso1蛋白能够乙酰化Pol5蛋白,介导pombe的生存能力。总的来说,我们的数据表明,Eso1与Pol5的相互作用使Pol5蛋白乙酰化,对pombe的生存至关重要。
Eco1/Eso1 protein plays an important role in chromosome segregation, DNA repair and gene regulation. Eco1 mutation induces Roberts syndrome clinically and rDNA transcription disorders in vivo. In this study, we examined the role of Eso1 protein binding to polymerase 5 (Pol5) and the acetylation of Pol5 protein in the regulation of Schizosaccharomyces pombe (S. pombe) viability. Immunoprecipitation and mass spectrometry assays identified Eso1 protein binding to Cdc2, Pol5 and Cdc21, as well as other proteins. Pol5 protein specifically bound to Eso1 protein, but not to the Rad30 part or Rad30 part plus the additional zinc finger domain of Eco1 protein. Mass spectrometry data further identified several acetylation or trimethylation modification sites in the lysine residues of the Pol5 protein. However, the mutation of the Pol5 K47 site to arginine was lethal to S. pombe. Eso1 protein was able to acetylate Pol5 protein and mediate S. pombe viability. On the whole, our data indicate that the Eso1 interaction with Pol5 which acetylates Pol5 protein is essential for S. pombe viability.
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