Roles of novobiocin-sensitive topoisomerases in chloroplast DNA replication in Chlamydomonas reinhardtii.

Roles of novobiocin-sensitive topoisomerases in chloroplast DNA replication in Chlamydomonas reinhardtii.
复制标题

新生霉素敏感拓扑异构酶在莱茵衣藻叶绿体 DNA 复制中的作用。

DOI:
10.1093/nar/21.18.4231
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发表时间:
1993
影响因子:
14.9
通讯作者:
Mosig,G
Mosig,G
中科院分区:
生物学2区
文献类型:
--
作者:
Woelfle,MA;Thompson,RJ;Mosig,G

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我们研究了用亚致死剂量的新福布隆灭活叶绿体II型拓扑异构酶时,莱茵衣藻叶绿体中的DNA复制。在这些条件下,DNA复制首先被抑制。然而,在延迟几个小时后,叶绿体染色体启动了一种对新生物素不敏感的DNA复制模式。这种复制优先从大的反向重复序列中的重组热点附近开始,而不是从正常的叶绿体起源Orla和Orib开始。它复制叶绿体染色体的一个区域,但不复制另一个单拷贝区域。我们推测,叶绿体中新的无感觉DNA复制需要在这个首选起始区进行重组。
We have examined DNA replication In Chlamydomonas reinhardtii chloroplasts in vivo when chloroplast type II topoisomerases are inactivated with sublethal doses of novoblocln. DNA replication Is at first inhibited under these conditions. However, after a delay of several hours, chloroplast chromosomes Initiate a novobiocin-Insensitive mode of DNA replication. This replication starts preferentially near a hotspot of recombination in the large inverted repeats, Instead of from the normal chloroplast origins, orlA and oriB. It replicates one, but not the other single-copy region of the chloroplast chromosome. We speculate that novoblocln-insensltive DNA replication In chloroplasts requires recombination in this preferred Initiation region.
DOI: --
发表时间: 2008
期刊:
影响因子: --
作者:
1 Minagawa;J.
通讯作者: J.
DNA拓扑结构及其生物学效应
DOI: 10.5860/choice.28-3289
发表时间: 1990
期刊: Chemosphere
影响因子: 8.8
作者:
N. Cozzarelli;James C. Wang
通讯作者: James C. Wang