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[Comparison of genomes in Streptococcus thermophilus strains of different origins]
S G Botina1, A M Lysenko, V V Sukhodelets
1State Research Institute of Genetics and Selection of Industrial Microorganisms (GOSNIIGENETIKA), Pervyi Dorozhnyi proezd 1, Moscow, 113545 Russia.
Mikrobiologiia
|January 16, 2003
Abstract:
According to DNA hybridization data, thermophilic streptococci used in Russia as starters in the dairy industry are divided into 6 different genomovars, with a degree of DNA homology not exceeding 20-50%. The analysis of genomes from these genomovars using SmaI restriction endonuclease and pulsed-field gel electrophoresis revealed a wide variability of the genome size. In some strains, the genome size considerably exceeded 2000 kbp. Most of the strains studied contained plasmids about 120 kbp in size.