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5 results on '"Nazina, T.N."'

3. Genome analysis of Desulfotomaculum kuznetsovii strain 17T reveals a physiological similarity with Pelotomaculum thermopropionicum SIT

Author

Visser, M., Worm, P., Muyzer, G., Pereira, I.A.C., Schaap, P.J., Plugge, C.M., Kuever, J., Parshina, S.N., Nazina, T.N., Ivanova, A.E., Bernier-Latmani, R., Goodwin, L.A., Kyrpides, N., Woyke, T., Chain, P., Davenport, K.W., Spring, S., Klenk, H.P., Stams, A.J.M., Visser, M., Worm, P., Muyzer, G., Pereira, I.A.C., Schaap, P.J., Plugge, C.M., Kuever, J., Parshina, S.N., Nazina, T.N., Ivanova, A.E., Bernier-Latmani, R., Goodwin, L.A., Kyrpides, N., Woyke, T., Chain, P., Davenport, K.W., Spring, S., Klenk, H.P., and Stams, A.J.M.

Abstract

Desulfotomaculum kuznetsovii is a moderately thermophilic member of the polyphyletic spore-forming genus Desulfotomaculum in the family Peptococcaceae. This species is of interest because it originates from deep subsurface thermal mineral water at a depth of about 3000 m. D. kuznetsovii is a rather versatile bacterium as it can grow with a large variety of organic substrates, including short-chain and long-chain fatty acids, which are degraded completely to carbon dioxide coupled to the reduction of sulfate. It can grow methylotrophically with methanol and sulfate and autotrophically with H2 + CO2 and sulfate. For growth it does not require any vitamins. Here, we describe the features of D. kuznetsovii together with the genome sequence and annotation. The chromosome has 3,601,386 bp organized in one contig. A total of 3567 candidate protein-encoding genes and 58 RNA genes were identified. Genes of the acetyl-CoA pathway possibly involved in heterotrophic growth with acetate and methanol, and in CO2 fixation during autotrophic growth are presented. Genomic comparison revealed that D. kuznetsovii shows a large similarity with Pelotomaculum thermopropionicum. Genes involved in propionate metabolism of these two strains show a strong similarity. However, main differences are found in genes involved in the electron acceptor metabolism

Published
2013

4. Production of Oil-Releasing Compounds by Microorganisms from the Daqing Oil Field, China.

Author

Nazina, T.N., Sokolova, D. Sh., Grigor'yan, A.A., Xue, Y.-F., Belyaev, S.S., and Ivanov, M.V.

Subjects
*AEROBIC bacteria, *OIL fields, *BACILLUS (Bacteria), *BREVIBACTERIUM, *POLYSACCHARIDES
Abstract

Twenty pure cultures isolated from formation waters of the Daqing oil field were studied with respect to their capacity to produce surface-active compounds in media with individual hydrocarbons, lower alcohols, and fatty acids. Aerobic saprotrophic bacteria belonging to the genera Bacillus, Brevibacillus, Rhodococcus, Dietzia, Kocuria, Gordonia, Cellulomonas, Clavibacter, Pseudomonas, and Acinetobacter decreased the surface tension of cultivation media from 55–63 to 28–44 mN/m. Strains of Bacillus cereus, Rhodococcus ruber, and Bacillus licheniformis produced biosurfactants most actively. Bacteria of the genera Rhodococcus, Dietzia, Kocuria, and Gordonia produced exopolysaccharides in media with hydrocarbons. Culture liquids of the strains of R. ruber and B. licheniformis exhibited an oil-releasing effect. Thus, the Daqing oil field is inhabited by aerobic bacteria capable of producing effective oil-releasing agents. [ABSTRACT FROM AUTHOR]

Published
2003
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5. Heterogeneity of the Nucleotide Sequences of the 16S rRNA Genes of the Type Strain of Desulfotomaculum kuznetsovii.

Author

Tourova, T.P., Kuznetzov, B.B., Novikova, E.V., Poltaraus, A.B., and Nazina, T.N.

Subjects
NUCLEOTIDE sequence, BACTERIA, MOLECULAR genetics, TRANSGENIC organisms, MICROBIOLOGY, MICROORGANISMS
Abstract

Two copies of the 16S rRNA gene, rrnAand rrnB, of the type strain 17Tof the thermophilic sulfate-reducing bacterium Desulfotomaculum kuznetsoviiwere cloned and completely sequenced. The comparison of the determined sequences revealed considerable heterogeneity (8.3%) of the two genes, rrnAand rrnB.The main differences were associated with superlong inserts located in the variable 5"- and 3"-terminal regions of the 16S rRNA genes. Comparative analysis that involved analogous genes from the phylogenetically closest representatives of the genus Desulfotomaculumshowed that disregard of the heterogeneity of the two gene copies distorts the position of the bacterium studied in the phylogenetic tree. [ABSTRACT FROM AUTHOR]

Published
2001
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