Eukaryotic DNA Replication Fork.

Eukaryotic DNA Replication Fork.
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DOI:
10.1146/annurev-biochem-061516-044709
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发表时间:
2017-06-20
影响因子:
16.6
通讯作者:
Kunkel TA
Kunkel TA
中科院分区:
生物学1区
文献类型:
--
作者:
Burgers PMJ;Kunkel TA

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本文综述了真核生物DNA复制叉的生物发生和组成,重点介绍了合成DNA和修复复制叉滞后链上的不连续的酶。讨论了旨在理解这些过程的物理和遗传方法。大多数证据支持这样一种模型,在该模型中,DNA聚合酶ε(POLε)在一个未受干扰的复制叉处进行大量的领先链DNA合成。α聚合酶和β聚合酶分别负责冈崎氏片段的合成及其延伸和成熟。这篇综述还讨论了可供选择的建议,包括可以使用替代分叉的细胞过程,以及利用纯化蛋白进行的新的生化研究,其目的是分别重组领先的和滞后的链DNA合成,并作为一个整合的复制分叉。
This review focuses on the biogenesis and composition of the eukaryotic DNA replication fork, with an emphasis on the enzymes that synthesize DNA and repair discontinuities on the lagging strand of the replication fork. Physical and genetic methodologies aimed at understanding these processes are discussed. The preponderance of evidence supports a model in which DNA polymerase ε (Pol ε) carries out the bulk of leading strand DNA synthesis at an undisturbed replication fork. DNA polymerases α and β carry out the initiation of Okazaki fragment synthesis and its elongation and maturation, respectively. This review also discusses alternative proposals, including cellular processes during which alternative forks may be utilized, and new biochemical studies with purified proteins that are aimed at reconstituting leading and lagging strand DNA synthesis separately and as an integrated replication fork.
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