Preferential repair of the transcribed DNA strand in plants.

Preferential repair of the transcribed DNA strand in plants.
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优先修复植物中转录的DNA链。

DOI:
10.3389/fpls.2011.00105
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发表时间:
2011
影响因子:
5.6
通讯作者:
Britt AB
Britt AB
中科院分区:
生物学2区
文献类型:
--
作者:
Fidantsef AL;Britt AB

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紫外线诱导的嘧啶二聚体阻断DNA和RNA聚合酶的发展。为了减少这些病变对基因表达的干扰影响,细菌、酵母和动物优先修复活跃表达的基因的转录链,基本上是使用停滞的聚合酶作为巨大病变的检测器。这是假定的,但没有证明,这种优先的维修也发生在工厂。在这里,我们证明了在编码RNA聚合酶II的成分表达基因中,大亚基环丁烷嘧啶二聚体从转录链上移除的速度比从非转录链上更快。
UV-induced pyrimidine dimers block the progression of both DNA and RNA polymerases. In order to reduce the disruptive effect of these lesions on gene expression, bacteria, yeasts, and animals preferentially repair the transcribed strand of actively expressed genes, essentially employing the stalled polymerase as a detector for bulky lesions. It has been assumed, but not demonstrated, that this prioritization of repair also occurs in plants. Here we demonstrate that in the constitutively expressed gene encoding the RNA polymerase II large subunit cyclobutane pyrimidine dimers are removed from the transcribed strand more rapidly than from the non-transcribed strand.
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