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© Research
Publication : Journal of bacteriology

Molecular characterization of IS1541 insertions in the genome of Yersinia pestis

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Journal of bacteriology - 01 Jan 1998

Odaert M, Devalckenaere A, Trieu-Cuot P, Simonet M

Link to Pubmed [PMID] – 9422611

J. Bacteriol. 1998 Jan;180(1):178-81

The genome of Yersinia pestis, the causative agent of plague, contains at least 30 copies of an element, designated IS1541, which is structurally related to IS200 (85% identity). One such element is inserted within the chromosomal inv gene (M. Simonet, B. Riot, N. Fortineau, and P. Berche, Infect. Immun. 64:375-379, 1996). We characterized other IS1541 insertions by cloning 14 different Y. pestis 6/69M loci carrying a single copy of this insertion sequence (IS) into Escherichia coli and, for each element, sequencing 250 bp of both flanking regions. In no case was this IS element inserted into large open reading frames; however, in eight cases, it was detected downstream (17 to 139 bp) of genes thought to be transcribed monocistronically or which constituted the last gene of an operon, and in only one case was it detected upstream (37 bp) of the first gene of an operon. Sequence analysis revealed stem-loop structures (deltaG, < -10 kcal) resembling rho-independent transcription terminators in 8 of the 14 insertion sites. These motifs might constitute hot spots for insertion of this IS1541 element within the Y. pestis genome.

http://www.ncbi.nlm.nih.gov/pubmed/9422611