A genetic screen to discover pathways affecting cohesin function in Schizosaccharomyces pombe identifies chromatin effectors.

A genetic screen to discover pathways affecting cohesin function in Schizosaccharomyces pombe identifies chromatin effectors.
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DOI:
10.1534/g3.112.003327
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发表时间:
2012-10
期刊:
G3 (Bethesda, Md.)
影响因子:
--
通讯作者:
Gerton JL
Gerton JL
中科院分区:
其他
文献类型:
--
作者:
Chen Z;McCrosky S;Guo W;Li H;Gerton JL

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凝聚力是从DNA复制到中期到后期转变时将姐妹染色单体保持在一起的力量,是由粘附素复合体介导的。该复合体还参与DNA损伤修复、染色体凝聚和基因调控。为了更多地了解粘附素的细胞功能,我们用两个不同的粘附素突变体(eso1-G799D和mis4-242)在裂殖酵母中进行了遗传筛选。我们发现了与DNA复制和异染色质形成有关的基因缺失的人工负相互作用。我们还发现一些基因缺失挽救了eso1-G799D在非允许温度下的生长,这些基因部分挽救了落后的染色体表型。这些基因都是染色质效应器。总体而言,我们的屏幕显示了粘附素和染色质之间的密切联系。
Cohesion, the force that holds sister chromatids together from the time of DNA replication until separation at the metaphase to anaphase transition, is mediated by the cohesin complex. This complex is also involved in DNA damage repair, chromosomes condensation, and gene regulation. To learn more about the cellular functions of cohesin, we conducted a genetic screen in Schizosaccharomyces pombe with two different cohesin mutants (eso1-G799D and mis4-242). We found synthetic negative interactions with deletions of genes involved in DNA replication and heterochromatin formation. We also found a few gene deletions that rescued the growth of eso1-G799D at the nonpermissive temperature, and these genes partially rescue the lagging chromosome phenotype. These genes are all chromatin effectors. Overall, our screen revealed an intimate association between cohesin and chromatin.
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