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Heterochromatin and DNA damage repair: Use different histone variants and relax

机译:异染色质和DNA损伤修复:使用不同的组蛋白变体并放松

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Repair of damaged DNA requires the activation of kinases, which in turn phosphorylate diverse proteins including histone H2A.X, an event conserved from yeast to human. By combining genetics, biochemical, and cytological approaches, we recently reported that, in addition to H2A.X, phosphorylation of histone variant H2A.W.7 is required for DNA damage response in Arabidopsis. This work provides direct evidence for the functional diversification of plant-specific H2A.W histone variants, which are tightly associated with heterochromatin. We place our findings in perspective of other recent reports and discuss how DNA damage is being recognized and repaired in heterochromatin.
机译:修复受损的DNA需要激活激酶,从而使包括组蛋白H2A.X在内的多种蛋白质磷酸化,这是一个从酵母到人保守的事件。通过结合遗传学,生物化学和细胞学方法,我们最近报道了,除了H2A.X之外,组蛋白变体H2A.W.7的磷酸化对于拟南芥DNA损伤应答也是必需的。这项工作为植物特异性H2A.W组蛋白变体的功能多样化提供了直接证据,这些变体与异染色质紧密相关。我们将我们的发现与其他近期报道相结合,并讨论如何在异染色质中识别和修复DNA损伤。

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