Molecular dissection of a Bifidobacterial replicon

被引:25
作者
Cronin, Michelle [1 ]
Knobel, Moritz [1 ]
O'Connell-Motherway, Mary [1 ]
Fitzgerald, Gerald F. [1 ]
van Sinderen, Douwe [1 ]
机构
[1] Natl Univ Ireland Univ Coll Cork, Alimentary Pharmabiot Ctr, Dept Microbiol, Cork, Ireland
关键词
D O I
10.1128/AEM.01630-07
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
The 2.1-kb cryptic plasmid pCIBAO89 from Bifidobacterium asteroides harbors a 1.4-kb segment which is sufficient for its autonomous replication. The segment is divided into two parts, the presumed replication origin, ori89, and the rep gene encoding the putative 41-kDa Rep89 replication initiation protein. This minimal replication region of pCIBAO89 was functionally dissected by transcriptional analyses as well as by DNA-binding studies, and the information obtained was exploited to create a number of Escherichia coli-Bifidobacterium shuttle vectors capable of transforming various bifidobacteria with an efficiency of up to 106 transformants/mu g DNA.
引用
收藏
页码:7858 / 7866
页数:9
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