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Journal of Bacteriology, September 2001, p. 5436-5440, Vol. 183, No. 18
0021-9193/01/$04.00+0   DOI: 10.1128/JB.183.18.5436-5440.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

Distribution of the SsuDAT1I Restriction-Modification System among Different Serotypes of Streptococcus suis

Tsutomu Sekizaki,* Makoto Osaki, Daisuke Takamatsu, and Yoshihiro Shimoji

National Institute of Animal Health, Tsukuba, Ibaraki, Japan

Received 12 April 2001/Accepted 1 June 2001

The SsuDAT1I restriction-modification (R-M) system, which contains two methyltransferases and two restriction endonucleases with recognition sequence 5'-GATC-3', was first found in a field isolate of Streptococcus suis serotype 2. Isoschizomers of the R-M system were found in the same locus between purH and purD in a field isolate of serotype 1/2 and the reference strains of serotypes 3, 7, 23, and 26 among 29 strains of different serotypes examined in this study. The R-M gene sequences in serotypes 1/2, 3, 7, and 23 were very similar to those of SsuDAT1I, whereas those in serotype 26 were less similar. These results indicate intraspecies recombination among them and genetic divergence through their evolution.

* Corresponding author. Mailing address: Molecular Bacteriology Section, National Institute of Animal Health, 3-1-5 Kannondai, Tsukuba, Ibaraki 305-0856, Japan. Phone: (298) 38-7743. Fax: (298) 38-7907. E-mail: sekizaki{at}niah.affrc.go.jp.

Journal of Bacteriology, September 2001, p. 5436-5440, Vol. 183, No. 18
0021-9193/01/$04.00+0   DOI: 10.1128/JB.183.18.5436-5440.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.


This article has been cited by other articles:

  • Sekizaki, T., Takamatsu, D., Osaki, M., Shimoji, Y. (2005). Different Foreign Genes Incidentally Integrated into the Same Locus of the Streptococcus suis Genome. J. Bacteriol. 187: 872-883 [Abstract] [Full Text]  
  • Takamatsu, D., Osaki, M., Sekizaki, T. (2002). Evidence for Lateral Transfer of the Suilysin Gene Region of Streptococcus suis. J. Bacteriol. 184: 2050-2057 [Abstract] [Full Text]  


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