The Role of Topoisomerase II in DNA Repair and Recombination in Arabidopsis thaliana.
The Role of Topoisomerase II in DNA Repair and Recombination in Arabidopsis thaliana.
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拓扑异构酶II在拟南芥DNA修复和再生中的作用。
DOI:
10.3390/ijms222313115
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发表时间:
2021-12-04
影响因子:
5.6
通讯作者:
Sanchez-Moran E
中科院分区:
文献类型:
--
作者:
Martinez-Garcia M;White CI;Franklin FCH;Sanchez-Moran E
DNA entanglements and supercoiling arise frequently during normal DNA metabolism. DNA topoisomerases are highly conserved enzymes that resolve the topological problems that these structures create. Topoisomerase II (TOPII) releases topological stress in DNA by removing DNA supercoils through breaking the two DNA strands, passing a DNA duplex through the break and religating the broken strands. TOPII performs key DNA metabolic roles essential for DNA replication, chromosome condensation, heterochromatin metabolism, telomere disentanglement, centromere decatenation, transmission of crossover (CO) interference, interlock resolution and chromosome segregation in several model organisms. In this study, we reveal the endogenous role of Arabidopsis thaliana TOPII in normal root growth and cell cycle, and mitotic DNA repair via homologous recombination. Additionally, we show that the protein is required for meiotic DSB repair progression, but not for CO formation. We propose that TOPII might promote mitotic HR DNA repair by relieving stress needed for HR strand invasion and D-loop formation.
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