| Abstract: | We isolated an obligately anaerobic halophilic bacterium from the Dead Sea that grew by respiration of selenate. The isolate, designated strain DSSe-1, was a gram-negative, non-motile rod. It oxidized glycerol or glucose to acetate+CO2 with concomitant reduction of selenate to selenite plus elemental selenium. Other electron acceptors that supported anaerobic growth on glycerol were nitrate and trimethylamine-N-oxide; nitrite, arsenate, fumarate, dimethylsulfoxide, thiosulfate, elemental sulfur, sulfite or sulfate could not serve as electron acceptors. Growth on glycerol in the presence of nitrate occurred over a salinity range from 100 to 240 g/l, with an optimum at 210 g/l. Analysis of the 16S rRNA gene sequence suggests that strain DSSe-1 belongs to the order Halanaerobiales, an order of halophilic anaerobes with a fermentative or homoacetogenic metabolism, in which anaerobic respiratory metabolism has never been documented. The highest 16S rRNA sequence similarity (90%) was found with Acetohalobium arabaticum (X89077). On the basis of physiological properties as well as the relatively low homology of 16S rRNA from strain DSSe-1 with known genera, classification in a new genus within the order Halanaerobiales, family Halobacteroidaceae is warranted. We propose the name Selenihalanaerobacter shriftii. Type strain is strain DSSe-1 (ATCC accession number BAA-73). |
| Genre: | Article |
| ProdID: | 70024034 |
| Citation Author: | Switzer, Blum, J.; Stolz, J. F.; Oren, A.; Oremland, R. S. |
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| Citation End Page: | 219 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Archives of Microbiology |
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| Citation Number Of Pages: | 12 |
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| Citation Search Results Text: | Selenihalanaerobacter shriftii gen. nov., sp. nov., a halophilic anaerobe from Dead Sea sediments that respires selenate; 2001; Article; Journal; Archives of Microbiology; Switzer, Blum, J.; Stolz, J. F.; Oren, A.; Oremland, R. S. |
| Citation Start Page: | 208 |
| Citation Volume: | 175 |
| Citation Year: | 2001 |
| Type: | citation/reference |
| Text: | Selenihalanaerobacter shriftii gen. nov., sp. nov., a halophilic anaerobe from Dead Sea sediments that respires selenate; 2001; Article; Journal; Archives of Microbiology; Switzer, Blum, J.; Stolz, J. F.; Oren, A.; Oremland, R. S. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1007/s002030100257 |
| Date Other: | Mon, 1 Jan 2001 00:00 -0600 |
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