Thirteen strains of industrial bacterial cultures of the genus Lactobacillus (from a collection of Gabrichevsky Research Institute of Epidemiology and Microbiology) were studied. These strains were used for decades in Russian Federation for food and drug production, as ferments for lactic acid products, for production of probiotics, biologically active and veterinary preparations. Complex analysis of data on cultures obtained using microbiological and molecular-genetic methods was conducted for the first time. Biochemical characteristics of these cultures were studied and the sequence of the proximal region of 16S ribosomal RNA gene was determined. The employement of the test system API-50CHL was shown to broaden the opportunities of a more accurate biochemical identification of bacteria belonging to the genus Lactobacillus, in comparison with the set ANAEROTEST-23. According to the results obtained in a comparative analysis of nucleotide sequences of 16S rRNA gene, all strains examined show 97–99% homology of the proximal region of this gene with that of the type representatives of studied species. These data allowed taxonomic reclassification of the species position of cultures with consideration of the more advanced level of systematics. Nucleotide sequences of gene fragments of examined lactobacilli strains were recorded in NCBI database (accession numbers of deposits GU560031, GU560032, GU560033, GU560034, GU560035, GU560036, GU560037, GU560038, GU560039, GU560040, GU560041, GU560042, GU560043).
Russian Journal of Genetics – Springer Journals
Published: Nov 17, 2010
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