Identification and DNA sequence of a new Bacteroides fragilis insertion sequence-like element

Plasmid ◽  
1991 ◽  
Vol 25 (2) ◽  
pp. 141-144 ◽  
Author(s):  
Beth Ann Rasmussen ◽  
Endre Kovacs
Keyword(s):  
Dna Sequence ◽  
Insertion Sequence ◽  
Bacteroides Fragilis

A new insertion sequence element containing a cfiA gene in the first imipenem-resistant Bacteroides fragilis strain isolated in Italy

2009 ◽  
Vol 34 (6) ◽  
pp. 608-609
Author(s):  
Giuliana Lo Cascio ◽  
Laura Macaccaro ◽  
Anna Rita Centonze ◽  
Jozef Sóki ◽  
Roberta Fontana ◽  
...  
Keyword(s):  
Insertion Sequence ◽  
Bacteroides Fragilis ◽  
Sequence Element ◽  
Insertion Sequence Element

scholarly journals Conjugative Interaction Induces Transposition of ISPst9 in Pseudomonas stutzeri AN10

2008 ◽  
Vol 191 (4) ◽  
pp. 1239-1247 ◽  
Author(s):  
J. A. Christie-Oleza ◽  
M. P. Lanfranconi ◽  
B. Nogales ◽  
J. Lalucat ◽  
R. Bosch
Keyword(s):  
Escherichia Coli ◽  
Dna Sequence ◽  
Insertion Sequence ◽  
Genetic Material ◽  
Pseudomonas Stutzeri ◽  
E Coli ◽  
Double Stranded Dna ◽  
Circle Formation ◽  
Flanking Regions ◽  
Kinetics Of

ABSTRACT ISPst9 is an ISL3-like insertion sequence (IS) that was recently described in the naphthalene-degrading organism Pseudomonas stutzeri strain AN10. In this paper we describe a novel strong IS regulation stimulus; transposition of ISPst9 is induced in all P. stutzeri AN10 cells after conjugative interaction with Escherichia coli. Thus, we observed that in all P. stutzeri AN10 cells that received genetic material by conjugation the ISPst9 genomic dose and/or distribution was changed. Furthermore, ISPst9 transposition was also observed when P. stutzeri AN10 cells were put in contact with the plasmidless conjugative strain E. coli S17-1λ pir , but not when they were put in contact with E. coli DH5α (a nonconjugative strain). The mechanism of ISPst9 transposition was analyzed, and transposition was shown to proceed by excision from the donor DNA using a conservative mechanism, which generated 3- to 10-bp deletions of the flanking DNA. Our results indicate that ISPst9 transposes, forming double-stranded DNA circular intermediates consisting of the IS and a 5-bp intervening DNA sequence probably derived from the ISPst9 flanking regions. The kinetics of IS circle formation are also described.

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