Actin homolog MreB affects chromosome segregation by regulating topoisomerase IV in Escherichia coli.
Actin homolog MreB affects chromosome segregation by regulating topoisomerase IV in Escherichia coli.
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DOI:
10.1016/j.molcel.2009.01.001
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发表时间:
2009-01-30
期刊:
影响因子:
16
通讯作者:
Marians, Kenneth J.
中科院分区:
文献类型:
--
作者:
Madabhushi, Ram;Marians, Kenneth J.
In Escherichia coli, topoisomerase IV, a type II topoisomerase, mediates the resolution of topological linkages between replicated daughter chromosomes and is essential for chromosome segregation. Topo IV activity is restricted to only a short interval late in the cell cycle. However, the mechanism that confers this temporal regulation is unknown. Here we report that the bacterial actin homologue, MreB, participates in the temporal oscillation of Topo IV activity. We show that mreB mutant strains are deficient in Topo IV activity. In addition, we demonstrate that depending upon whether it is in a monomeric or polymerized state, MreB affects Topo IV activity differentially. In addition, MreB physically interacts with the ParC subunit of Topo IV. Together these results may explain how dynamics of the bacterial cytoskeleton are coordinated with the timing of chromosome segregation.
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影响因子:
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作者:
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通讯作者:
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影响因子:
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Marians, KJ
DOI:
10.1073/pnas.0402638101
发表时间:
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影响因子:
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作者:
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通讯作者:
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作者:
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通讯作者:
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