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在没有其他真核生物蛋白的情况下,多梳复合物通过 DNA 复制保持结合。

A Polycomb complex remains bound through DNA replication in the absence of other eukaryotic proteins.

机构信息

Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138, USA.

出版信息

Sci Rep. 2012;2:661. doi: 10.1038/srep00661. Epub 2012 Sep 17.

DOI:10.1038/srep00661
PMID:22993687
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3443814/
Abstract

Propagation of chromatin states through DNA replication is central to epigenetic regulation and can involve recruitment of chromatin proteins to replicating chromatin through interactions with replication fork components. Here we show using a fully reconstituted T7 bacteriophage system that eukaryotic proteins are not required to tether the Polycomb complex PRC1 to templates during DNA replication. Instead, DNA binding by PRC1 can withstand passage of a simple replication fork.

摘要

染色质状态通过 DNA 复制进行传播是表观遗传调控的核心,这可能涉及通过与复制叉组件的相互作用将染色质蛋白募集到复制染色质。在这里,我们使用一个完全重建的 T7 噬菌体系统表明,真核蛋白在 DNA 复制过程中不需要将 Polycomb 复合物 PRC1 固定在模板上。相反,PRC1 的 DNA 结合可以承受简单复制叉的通过。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b47/3443814/c0517b51ec61/srep00661-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b47/3443814/b437b76d835a/srep00661-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b47/3443814/9be034d99519/srep00661-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b47/3443814/2ba9c9450a91/srep00661-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b47/3443814/c0517b51ec61/srep00661-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b47/3443814/b437b76d835a/srep00661-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b47/3443814/9be034d99519/srep00661-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b47/3443814/2ba9c9450a91/srep00661-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9b47/3443814/c0517b51ec61/srep00661-f4.jpg

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A core subunit of Polycomb repressive complex 1 is broadly conserved in function but not primary sequence.
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