Coordinating DNA polymerase traffic during high and low fidelity synthesis.

Coordinating DNA polymerase traffic during high and low fidelity synthesis.
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DOI:
10.1016/j.bbapap.2009.06.010
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发表时间:
2010-05
期刊:
Biochimica et biophysica acta
影响因子:
--
通讯作者:
Sutton MD
Sutton MD
中科院分区:
其他
文献类型:
--
作者:
Sutton MD

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随着生物体拥有多个显示不同保真度、加工和活性的DNA聚合酶(POL)的发现,人们意识到必须存在机制来管理这些不同酶的活动,以防止无端突变。尽管大多数生物编码的许多POL在很大程度上是准确的,并参与DNA复制和DNA修复,但相当大的一部分显示出保真度降低,并催化潜在的易出错的跨损伤DNA合成(TLS)过去在DNA中持续存在的损伤。在DNA复制、DNA修复和TLS过程中使用这些不同的酶之间取得适当的平衡,对于确保细胞基因组的准确复制至关重要。这篇综述重点介绍了生物体用来管理其不同POL活动的机制。特别强调对当前模型的讨论,这些模型用于不同的POL在高保真复制期间如何在复制分叉处彼此交换位置以及潜在地错误传递TLS。
With the discovery that organisms possess multiple DNA polymerases (Pols) displaying different fidelities, processivities, and activities came the realization that mechanisms must exist to manage the actions of these diverse enzymes to prevent gratuitous mutations. Although many of the Pols encoded by most organisms are largely accurate, and participate in DNA replication and DNA repair, a sizeable fraction display a reduced fidelity, and act to catalyze potentially error-prone translesion DNA synthesis (TLS) past lesions that persist in the DNA. Striking the proper balance between use of these different enzymes during DNA replication, DNA repair, and TLS is essential for ensuring accurate duplication of the cell’s genome. This review highlights mechanisms that organisms utilize to manage the actions of their different Pols. A particular emphasis is placed on discussion of current models for how different Pols switch places with each other at the replication fork during high fidelity replication and potentially error-pone TLS.
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