Genome-wide Excision Repair Map of Cyclobutane Pyrimidine Dimers in Arabidopsis and the Roles of CSA1 and CSA2 Proteins in Transcription-coupled Repair.

Genome-wide Excision Repair Map of Cyclobutane Pyrimidine Dimers in Arabidopsis and the Roles of CSA1 and CSA2 Proteins in Transcription-coupled Repair.
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DOI:
10.1111/php.13519
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发表时间:
2022-05
影响因子:
3.3
通讯作者:
Sancar, Aziz
Sancar, Aziz
中科院分区:
生物学3区
文献类型:
--
作者:
Kaya, Sezgi;Adebali, Ogun;Oztas, Onur;Sancar, Aziz

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植物依靠光来产生能量。然而,太阳光中的UV组分也会造成DNA损伤,主要以环丁烷嘧啶二聚体(CPD)和(6-4)嘧啶-嘧啶酮光产物的形式,其对植物细胞具有致突变性和致死性。这些损伤通过蓝光依赖性光裂合酶和核苷酸切除修复酶系统修复。在这里,我们的特点在拟南芥全基因组和单核苷酸分辨率的核苷酸切除修复,特别关注转录偶联修复和CSA 1和CSA 2基因/蛋白质的作用,在规定的效率和链偏好的修复转录基因。我们证明,CSA 1是主要的蛋白质在耦合修复转录与CSA 2的贡献较小。
Plants depend on light for energy production. However, the UV component in sunlight also inflicts DNA damage, mostly in the form of cyclobutane pyrimidine dimers (CPD) and (6-4) pyrimidine–pyrimidone photoproducts, which are mutagenic and lethal to the plant cells. These lesions are repaired by blue-light-dependent photolyases and the nucleotide excision repair enzymatic systems. Here, we characterize nucleotide excision repair in Arabidopsis thaliana genome-wide and at single nucleotide resolution with special focus on transcription-coupled repair and the role of the CSA1 and CSA2 genes/proteins in dictating the efficiency and the strand preference of repair of transcribed genes. We demonstrate that CSA1 is the dominant protein in coupling repair to transcription with minor contribution from CSA2.
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