Desulfovibrio salexigens DSM 2638

Names Desulfovibrio salexigens DSM 2638
Accession numbers NC_012881
Background Desulfovibrio salexigens (strain ATCC 14822 / DSM 2638 / NCIB 8403 / VKM B-1763) is an anaerobic, marine sulfate reducer Gram-negative bacterium isolated from "sling mud" from British Guiana about 1951 or 52. It is described as a "fat vibrio" with a single, polar flagellum that grows at 30 degrees Celsius. D. salexigens represents a type called "exigent" that has an absolute requirement for >0.5% NaCl and can grow at concentrations >10%. It is listed among those sulfate reducers capable of nitrogen fixation, possibly linked to the phosphoroclastic reaction. D.salexigens appears to show a 40 to 400 fold increased resistance to the inhibitor hibitane versus D. vulgaris and Gram-positive sulfate reducers. In non-optimal growing conditions, it is pleiomorphic in that it forms coccoid structures. Of most interest, is the salt requirement and tolerance of D. salexigens. As background, fresh-water strains (e.g., D. vulgaris) are generally inhibited by about 1% NaCl and none grows with more than 3% salt. Those from marine habitats or those that are tolerant (e.g., Desulfovibrio G20) may not require salt but grow up to about 7% NaCl. Sequencing of the genome of this bacterium may provide directions to explore the differences in the adaptations to life in extreme saline conditions. (Adaptated from: (EBI Integr8)
Strain DSM 2638
Complete Yes
Sequencing centre (22-JUN-2009) US DOE Joint Genome Institute, 2800 Mitchell Drive B310, Walnut Creek, CA 94598, USA
(26-JUN-2009) National Center for Biotechnology Information, NIH, Bethesda, MD 20894, USA
Sequencing quality Level 6: Finished
Sequencing depth NA
Sequencing method 454-GS-FLX
Isolation site mud in British Guyana
Isolation country NA
Number of replicons 1
Gram staining properties Negative
Shape Bacilli
Mobility No
Flagellar presence Yes
Number of membranes 2
Oxygen requirements Anaerobic
Optimal temperature NA
Temperature range Mesophilic
Habitat Multiple
Biotic relationship Free living
Host name NA
Cell arrangement Singles
Sporulation Nonsporulating
Metabolism Sulfate reducer
Energy source NA
Diseases NA
Pathogenicity No