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Complete nucleotide sequence of pBMB67, a 67-kb plasmid from Bacillus thuringiensis strain YBT-1520

文献类型： 外文期刊

作者： Bao Qiyu;Song Fuping;Sun Ming;Huang Dafang;Liu Guiming;Yu Ziniu

作者机构：

关键词： Bacillus thuringiensis;cryptic plasmid;complete nucleotide sequence

期刊名称： PLASMID

ISSN： 0147-619X

年卷期： 2007 年 57 卷 1 期

页码：

收录情况： SCI

摘要： The complete nucleotide sequence of a large (67 kb) cryptic plasmid pBMB67 from Bacillus thuringiensis strain YBT-1520 was determined. Of the 74 predicted open reading frames (ORFs), 25 (34%) were assigned putative functions, 18 (24%) encoded conserved hypothetical proteins, and 31 (42%) had no homology to any genes present in the current open databases. The ORFs with similar functions were organized in a modular structure; thus, the DNA sequence of pBMB67 could be functionally divided into three modules, including a 39 kb transfer region encoding homologs of the Agrobacterium tumefaciens VirB/D4 system components VirB1, VirB4, VirB11, and VirD4, as well as homologs of Gram-positive conjugation proteins. We also found a potential operon that was analogous to the Rap-Phr cassettes from Bacillus subtilis, which are involved in cell-cell communication and transcriptional regulation. Thus, we suggest that pBMB67 is likely to be implicated in cell-cell signaling and plays a role in the regulation of several cellular processes, with the production of exoprotease being one of the candidates. (c) 2006 Elsevier Inc. All rights reserved.

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