Cloning and analysis of a large plasmid pBMB165 from Bacillus thuringiensis revealed a novel plasmid organization.

Cloning and analysis of a large plasmid pBMB165 from Bacillus thuringiensis revealed a novel plasmid organization.
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苏云金芽孢杆菌大质粒 pBMB165 的克隆和分析揭示了一种新的质粒组织

DOI:
10.1371/journal.pone.0081746
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Sun M
Sun M
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Wang Y;Peng D;Dong Z;Zhu L;Guo S;Sun M

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在这项研究中,我们报告了一个快速克隆策略,大型天然质粒通过重叠群连锁图的BAC文库。利用该方法,我们从苏云金杆菌黑色血清型菌株YBT-1765中克隆了一个大质粒pBMB 165。测序结果表明,pBMB 165全长77,627 bp,GC含量为35.36%,含有103个开放阅读框(ORF)。序列分析和比较表明,pBMB 165代表了一种新的质粒结构:它主要由一个pXO 2样复制子和移动的遗传元件(一个诱导型原噬菌体BMTP 3和一组转座元件)组成。这是第一次描述这种质粒组织模式,这可能是由于质粒复制子,原噬菌体和转座因子之间的重组事件。这种质粒结构揭示了原噬菌体BMBTP 3可能利用质粒复制子来维持其遗传稳定性。我们的研究结果提供了一个新的途径来了解细菌质粒和噬菌体之间的协同进化。
In this study, we report a rapid cloning strategy for large native plasmids via a contig linkage map by BAC libraries. Using this method, we cloned a large plasmid pBMB165 from Bacillus thuringiensis serovar tenebrionis strain YBT-1765. Complete sequencing showed that pBMB165 is 77,627 bp long with a GC-content of 35.36%, and contains 103 open reading frames (ORFs). Sequence analysis and comparison reveals that pBMB165 represents a novel plasmid organization: it mainly consists of a pXO2-like replicon and mobile genetic elements (an inducible prophage BMBTP3 and a set of transposable elements). This is the first description of this plasmid organization pattern, which may result from recombination events among the plasmid replicon, prophage and transposable elements. This plasmid organization reveals that the prophage BMBTP3 may use the plasmid replicon to maintain its genetic stability. Our results provide a new approach to understanding co-evolution between bacterial plasmids and bacteriophage.
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