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Distribution and activity of IS elements in Streptococcus mutans

Lookup NU author(s): Lesley Old, Emeritus Professor Roy Russell


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Insertion sequence (IS) elements are widely distributed selfmobilizing genetic elements that can affect genetic changes by integrating into the chromosome, mediating genetic rearrangements and facilitating horizontal gene transfer. Three members of the IS3 family have been identified in Streptococcus mutans: IS199 was discovered by its transposition while ISSmu1 and ISSmu2 were predicted from the genome sequence of S. mutans UA159. Sixty-eight strains of S. mutans were screened by PCR for carriage of the IS elements IS199, ISSmu1 and ISSmu2. Twenty-seven (30%) of the strains were positive for IS199, 33 (49%) were positive for ISSmu1 and 51 (75%) carried ISSmu2. All three IS were found in 11 strains, two were found in various combinations in 31, one was found in 16, while only 10 strains had none of the three IS for which we screened. ISSmu1 was demonstrated to be capable of transposition at a low frequency but no transposition of ISSmu2 was observed. © 2008 Federation of European Microbiological Societies. Published by Blackwell Publishing Ltd. All rights reserved.

Publication metadata

Author(s): Old LA, Russell RRB

Publication type: Article

Publication status: Published

Journal: FEMS Microbiology Letters

Year: 2008

Volume: 287

Issue: 2

Pages: 199-204

ISSN (print): 0378-1097

ISSN (electronic): 1574-6968

Publisher: Wiley-Blackwell Publishing Ltd.


DOI: 10.1111/j.1574-6968.2008.01312.x


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