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Int J Syst Evol Microbiol 56 (2006), 1539-1545; DOI  10.1099/ijs.0.63894-0
© 2006 International Union of Microbiological Societies

Thermovirga lienii gen. nov., sp. nov., a novel moderately thermophilic, anaerobic, amino-acid-degrading bacterium isolated from a North Sea oil well

Håkon Dahle and Nils-Kåre Birkeland

Department of Biology, University of Bergen, PO Box 7800, N-5020 Bergen, Norway

Correspondence
Nils-Kåre Birkeland
nils.birkeland{at}bio.uib.no

A novel anaerobic, moderately thermophilic bacterium, strain Cas60314T, was isolated from hot oil-well production water obtained from an oil reservoir in the North Sea. The cells were Gram-negative, motile, straight rods. The salinity and pH growth optima were 2.0–3.0 % NaCl and 6.5–7.0, respectively. The optimum temperature was 58 °C. Strain Cas60314T had a fermentative type of metabolism and utilized proteinous substrates, some single amino acids and a limited number of organic acids, but not sugars, fatty acids or alcohols. Cystine and elemental sulfur were reduced to sulfide. The G+C content of the DNA was 46.6 mol%. On the basis of phenotypic and phylogenetic features, it is proposed that this isolate represents a novel genus and species with the name Thermovirga lienii gen. nov., sp. nov. within the family Syntrophomonadaceae. The proposed type strain is strain Cas60314T (=DSM 17291T=ATTC BAA-1197T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain DSM 17291T is DQ071273.

The morphology and growth temperature profile of Thermovirga lienii gen. nov., sp. nov. are shown in supplementary figures available in IJSEM Online.




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