YabA and DnaD inhibit helix assembly of the DNA replication initiation protein DnaA

YabA and DnaD inhibit helix assembly of the DNA replication initiation protein DnaA
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YabA 和 DnaD 抑制 DNA 复制起始蛋白 DnaA 的螺旋组装

DOI:
10.1111/mmi.12353
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发表时间:
2013
影响因子:
3.6
通讯作者:
H. Murray
H. Murray
中科院分区:
生物学2区
文献类型:
--
作者:
G. Scholefield;H. Murray

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DNA复制起始的控制对于细胞生长是必不可少的。DNA复制起始蛋白的一个统一特征是它们独特的AAA+核苷酸结合结构域。细菌引发剂DnaA组装成右手螺旋寡聚体,该寡聚体基于相邻AAA+结构域之间的相互作用而构建,以形成活性引发复合物。最近,我们开发了一种独特的交联试验,专门检测ATP依赖的DnaA螺旋组装。在这里,我们已经利用这种测定来显示枯草芽孢杆菌中的两种DnaA调节蛋白,YabA和DnaD,抑制DnaA螺旋形成。这些结果,结合我们先前的发现,即调节因子Soj/帕拉也靶向DnaA丝的形成,突出了在起始反应期间调节DnaA螺旋形成的至关重要性。此外,这些观察结果使我们建议,DnaA寡聚化可能是在B. subtilis中的启动子组装途径的主要调节步骤,与基于大肠杆菌DnaA的细菌DNA复制的流行模型相反,其中ATP结合似乎是靶向活性。 
Control of DNA replication initiation is essential for cell growth. A unifying characteristic of DNA replication initiator proteins is their distinctive AAA+ nucleotide‐binding domains. The bacterial initiator DnaA assembles into a right‐handed helical oligomer built upon interactions between neighbouring AAA+ domains to form an active initiation complex. Recently we developed a unique cross‐linking assay that specifically detects ATP‐dependent DnaA helix assembly. Here we have utilized this assay to show that two DnaA regulatory proteins in Bacillus subtilis, YabA and DnaD, inhibit DnaA helix formation. These results, in combination with our previous finding that the regulatory factor Soj/ParA also targets DnaA filament formation, highlight the critical importance of regulating DnaA helix formation during the initiation reaction. Moreover, these observations lead us to suggest that DnaA oligomerization may be the main regulatory step of the initiator assembly pathway in B. subtilis, in contrast to the prevailing model of bacterial DNA replication based on Escherichia coli DnaA where ATP binding appears to be the targeted activity.
DOI: 10.1101/gr.9.1.27
发表时间: 1999-01
期刊: Genome research
影响因子: 7
作者:
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通讯作者: A. F. Neuwald;L. Aravind;J. Spouge;E. Koonin
DOI: 10.1139/o09-154
发表时间: 2010-02-01
期刊: BIOCHEMISTRY AND CELL BIOLOGY-BIOCHIMIE ET BIOLOGIE CELLULAIRE
影响因子: --
作者:
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通讯作者: Katayama, Tsutomu
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发表时间: 2004-04-01
影响因子: 3
作者:
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