SV40 DNA replication: from the A gene to a nanomachine.

SV40 DNA replication: from the A gene to a nanomachine.
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DOI:
10.1016/j.virol.2008.11.038
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发表时间:
2009-02-20
期刊:
影响因子:
3.7
通讯作者:
Zhao K
Zhao K
中科院分区:
医学3区
文献类型:
--
作者:
Fanning E;Zhao K

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猴病毒40(SV40)基因组的复制是迄今为止最好理解的真核DNA复制过程。与大多数原核基因组一样,SV40基因组是一个环状双链DNA,组成一个复制子。这个小的病毒基因组,它与核小体中的宿主组蛋白的关联,以及它对复制因子和前体的宿主细胞环境的依赖性,导致它作为一个简单而强大的模型被采用。复制步骤、病毒起始物、宿主蛋白及其作用机制最初使用无细胞SV40复制反应来定义。虽然我们对更复杂的宿主复制叉的理解正在推进,但还没有真核复制体被重建,SV40范式仍然是一个参考点。本文回顾了这一范式的发展中的一些里程碑,并推测其潜在的效用,以解决在真核生物基因组维护未解决的问题。
Duplication of the simian virus 40 (SV40) genome is the best understood eukaryotic DNA replication process to date. Like most prokaryotic genomes, the SV40 genome is a circular duplex DNA organized in a single replicon. This small viral genome, its association with host histones in nucleosomes, and its dependence on the host cell milieu for replication factors and precursors led to its adoption as a simple and powerful model. The steps in replication, the viral initiator, the host proteins, and their mechanisms of action were initially defined using a cell-free SV40 replication reaction. Although our understanding of the vastly more complex host replication fork is advancing, no eukaryotic replisome has yet been reconstituted and the SV40 paradigm remains a point of reference. This article reviews some of the milestones in the development of this paradigm and speculates on its potential utility to address unsolved questions in eukaryotic genome maintenance.
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