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Journal of Bacteriology, June 2003, p. 3473-3475, Vol. 185, No. 11
0021-9193/03/$08.00+0     DOI: 10.1128/JB.185.11.3473-3475.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.

Genomic Structure of the Salmonella enterica Serovar Typhimurium DT 64 Bacteriophage ST64T: Evidence for Modular Genetic Architecture

Princess T. Mmolawa,1,2,3 Horst Schmieger,4 Carly P. Tucker,1,5 and Michael W. Heuzenroeder1*

Infectious Diseases Laboratories, Institute of Medical and Veterinary Science,1 School of Pharmaceutical, Molecular and Biomedical Sciences, The University of South Australia, Adelaide, South Australia, 5000,5 Discipline of Microbiology and Immunology, Department of Molecular Biosciences, University of Adelaide, Adelaide, South Australia, 5005, Australia,2 Faculty of Agriculture, Science and Technology, Department of Animal Health, University of North West, Mmabatho, South Africa, 2735,3 Institute for Genetics and Microbiology, University of Munich, D-80638, Munich, Germany4

Received 23 October 2002/ Accepted 20 March 2003

The complete sequence of the double-stranded DNA genome of a serotype-converting temperate bacteriophage, ST64T, was determined. The 40,679-bp genomic sequence of ST64T has an overall GC content of 47.5% and was reminiscent of a number of lambdoid phages, in particular, P22. Inferred proteins of ST64T which exhibited a high degree of sequence similarity to P22 proteins (>90%) included the functional serotype conversion cassette, integrase, excisionase, Abc1, Abc2, early antitermination (gp24), NinD, NinH, NinZ, packaging (gp3 and gp2), head (with the exception of gp26, gp7, gp20, and gp16), and tail proteins. The putative immunity genes were highly related to those of Salmonella enterica serotype Typhimurium phage L, whereas the lysis genes were almost identical to those of S. enterica serovar Typhimurium PS3.

* Corresponding author. Mailing address: P. O. Box 14, Rundle Mall, Adelaide, South Australia, 5000, Australia. Phone: 618 8222 3275. Fax: 618 8222 3543. E-mail: heuzenroeder{at}imvs.sa.gov.au.

Journal of Bacteriology, June 2003, p. 3473-3475, Vol. 185, No. 11
0021-9193/03/$08.00+0     DOI: 10.1128/JB.185.11.3473-3475.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.



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