The histone H3.1 variant regulates TONSOKU-mediated DNA repair during replication.

The histone H3.1 variant regulates TONSOKU-mediated DNA repair during replication.
复制标题

组蛋白H3.1变体在复制过程中调节隆顿介导的DNA修复。

DOI:
10.1126/science.abm5320
复制
发表时间:
2022-03-18
期刊:
影响因子:
56.9
通讯作者:
Jacob, Yannick
Jacob, Yannick
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Davarinejad, Hossein;Huang, Yi-Chun;Mermaz, Benoit;LeBlanc, Chantal;Poulet, Axel;Thomson, Geoffrey;Joly, Valentin;Munoz, Marcelo;Arvanitis-Vigneault, Alexis;Valsakumar, Devisree;Villarino, Gonzalo;Ross, Alex;Rotstein, Benjamin H.;Alarcon, Emilio, I;Brunzelle, Joseph S.;Voigt, Philipp;Dong, Jie;Couture, Jean-Francois;Jacob, Yannick

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在植物和动物中,复制依赖性组蛋白 H3.1 的尾部与复制非依赖性组蛋白 H3.3 的尾部在第 31 位氨基酸处有所不同,但尚未指定该残基的功能以证明 H3.1 在复制过程中具有独特且保守的作用。在这里,我们证明了 TONSOKU (TSK/TONSL) 可以挽救断裂的复制叉,通过其四肽重复结构域识别丙氨酸 31,与 H3.1 发生特异性相互作用。我们的结果表明,植物中缺乏 ATXR5/ATXR6 催化的 H3K27me1 时的基因组不稳定性取决于 H3.1、TSK 和 DNA 聚合酶 theta (Pol θ)。总体而言,这项工作揭示了复制过程中 H3.1 的特异性功能,以及多细胞真核生物中用于调节复制后染色质成熟和 TSK 的常用策略,该策略依赖于组蛋白单甲基转移酶和读取 H3.1 变体。 TSK 的 TPR 结构域读取组蛋白 H3.1 变体以维持基因组稳定性。
The tail of replication-dependent histone H3.1 varies from that of replication-independent H3.3 at the amino acid located at position 31 in plants and animals, but no function has been assigned to this residue to demonstrate a unique and conserved role for H3.1 during replication. Here, we show that TONSOKU (TSK/TONSL), which rescues broken replication forks, specifically interacts with H3.1 via recognition of alanine 31 by its tetratricopeptide repeat domain. Our results indicate that genomic instability in the absence of ATXR5/ATXR6-catalyzed H3K27me1 in plants depends on H3.1, TSK and DNA polymerase theta (Pol θ). Overall, this work reveals an H3.1-specific function during replication and the common strategy used in multicellular eukaryotes for regulating post-replicative chromatin maturation and TSK, which relies on histone mono-methyltransferases and reading the H3.1 variant. The TPR domain of TSK reads the histone H3.1 variant to maintain genome stability.
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