Cellular strategies for regulating DNA supercoiling: a single-molecule perspective.

Cellular strategies for regulating DNA supercoiling: a single-molecule perspective.
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调节 DNA 超螺旋的细胞策略:单分子视角。

DOI:
10.1016/j.cell.2010.08.001
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发表时间:
2010-08-20
期刊:
影响因子:
64.5
通讯作者:
Dekker, Nynke H.
Dekker, Nynke H.
中科院分区:
生物学1区
文献类型:
--
作者:
Koster, Daniel A.;Crut, Aurelien;Shuman, Stewart;Bjornsti, Mary-Ann;Dekker, Nynke H.

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细胞DNA的过度缠绕和扭曲(即DNA超缠绕)是双链DNA螺旋结构固有的问题。超卷曲影响转录、DNA复制和染色体分离。因此,细胞必须微调超线圈以优化这些关键过程。在这里,我们总结了超级线圈是如何产生的,并回顾了超级线圈松弛的实验和理论见解。我们区分了超线圈通过扩散的被动耗散和超线圈通过拓扑异构酶的主动去除。我们还回顾了阐明超级线圈去除的时间尺度和机制的单分子研究。
Excess entangling and twisting of cellular DNA (i.e., DNA supercoiling) are problems inherent to the helical structure of double-stranded DNA. Supercoiling affects transcription, DNA replication, and chromosomal segregation. Consequently the cell must fine-tune supercoiling to optimize these key processes. Here, we summarize how supercoiling is generated and review experimental and theoretical insights into supercoil relaxation. We distinguish between the passive dissipation of supercoils by diffusion and the active removal of supercoils by topoisomerase enzymes. We also review single-molecule studies that elucidate the timescales and mechanisms of supercoil removal.
DOI: 10.1101/gad.838900
发表时间: 2000-11-15
影响因子: 10.5
作者:
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