Dataset Information

Salmonella genomic island 1 (SGI1), variant SGI1-I, and new variant SGI1-O in proteus mirabilis clinical and food isolates from China.

ABSTRACT: Salmonella genomic island 1 (SGI1) and variants (SGI1-I and the new variant SGI1-O) were mapped in five strains of Proteus mirabilis isolated from humans and food in China. Sequencing showed that SGI1 and variants were integrated at the 3' end of the chromosomal thdF gene as previously described for Salmonella strains.

SUBMITTER: Boyd DA

PROVIDER: S-EPMC2223879 | biostudies-literature | 2008 Jan

REPOSITORIES: biostudies-literature

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Publications

Salmonella genomic island 1 (SGI1), variant SGI1-I, and new variant SGI1-O in proteus mirabilis clinical and food isolates from China.

Boyd David A DA Shi Xiaolu X Hu Qing-hua QH Ng Lai King LK Doublet Benoit B Cloeckaert Axel A Mulvey Michael R MR

Antimicrobial agents and chemotherapy 20071119 1

Salmonella genomic island 1 (SGI1) and variants (SGI1-I and the new variant SGI1-O) were mapped in five strains of Proteus mirabilis isolated from humans and food in China. Sequencing showed that SGI1 and variants were integrated at the 3' end of the chromosomal thdF gene as previously described for Salmonella strains. ...[more]

PMID: 18025121

Similar Datasets

Project description:Integrative mobilizable elements belonging to the SGI1-H, -K, and -L Salmonella genomic island 1 (SGI1) variant groups are distinguished by the presence of an alteration in the backbone (IS1359 replaces 2.8?kb of the backbone extending from within traN [S005] to within S009). Members of this SGI1-HKL group have been found in Salmonella enterica serovars and in Proteus mirabilis Two novel variants from this group, designated SGI1-LK1 and SGI1-LK2, were found in the draft genomes of antibiotic-resistant P. mirabilis isolates from two French hospitals. Both variants can be derived from SGI1-PmGUE, a configuration found previously in another P. mirabilis isolate from France. SGI1-LK1 could arise via an IS26-mediated inversion in the complex class 1 integron that duplicated the IS26 element and the target site in IS6100 SGI1-LK1 also has a larger 8.59-kb backbone deletion extending from traN to within S013 and removing traG and traH. However, SGI1-LK1 was mobilized by an IncC plasmid. SGI1-LK2 can be derived from a hypothetical progenitor, SGI1-LK0, that is related to SGI1-PmGUE but lacks the aphA1 gene and one copy of IS26. The integron of SGI1-LK2 could arise via deletion of DNA adjacent to an IS26 and a deletion occurring via homologous recombination between duplicated copies of part of the integron 3'-conserved segment. SGI1-K can also be derived from SGI1-LK0. This would involve an IS26-mediated deletion and an inversion via homologous recombination of a segment between inversely oriented IS26s. Similar events can explain the configuration of the integrons in other SGI1-LK variants.IMPORTANCE Members of the SGI1-HKL subgroup of SGI1-type integrative mobilizable elements have a characteristic alteration in their backbone. They are widely distributed among multiply antibiotic-resistant Salmonella enterica serovars and Proteus mirabilis isolates. The SGI1-K type, found in the globally disseminated multiply antibiotic-resistant Salmonella enterica serovar Kentucky clone ST198 (sequence type 198), and various configurations in the original SGI1-LK group, found in other multiresistant S. enterica serovars and Proteus mirabilis isolates, have complex and highly plastic resistance regions due to the presence of IS26 However, how these complex forms arose and the relationships between them had not been analyzed. Here, a hypothetical progenitor, SGI1-LK0, that can be formed from the simpler SGI1-H is proposed, and the pathways to the formation of new variants, SGI1-LK1 and SGI1-LK2, found in P. mirabilis and other reported configurations via homologous recombination and IS26-mediated events are proposed. This led to a better understanding of the evolution of the SGI1-HKL group.

Dataset Information

Salmonella genomic island 1 (SGI1), variant SGI1-I, and new variant SGI1-O in proteus mirabilis clinical and food isolates from China.

Publications

Salmonella genomic island 1 (SGI1), variant SGI1-I, and new variant SGI1-O in proteus mirabilis clinical and food isolates from China.

Similar Datasets

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