NDLI: Hydrogenogenic and sulfidogenic growth of Thermococcus archaea on carbon monoxide and formate

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Hydrogenogenic and sulfidogenic growth of Thermococcus archaea on carbon monoxide and formate

Content Provider	Springer Nature Link
Author	Kozhevnikova, D. A. Tarav, E. A. Lebedinsky, A. V. Bonch Osmolovskaya, E. A. Sokolova, T. G.
Copyright Year	2016
Abstract	Enrichment and pure cultures of hyperthermophilic archaea capable of anaerobic growth on one-carbon compounds (CO and/or formate) were obtained from deep-sea sites of hydrothermal activity at the Mid-Atlantic Ridge, Lau Basin, and Guaymas Basin. All isolates belonged to the T. barophilus‒T. paralvinellae group within the genus Thermococcus. In all cases available for analysis, the genomes of Thermococcus strains capable of growth by hydrogenogenic utilization of CO and/or formate contained clusters of genes encoding energy-converting hydrogenase and either CO dehydrogenase or formate dehydrogenase and formate transporter. Apart from the previously known processes of hydrogenogenic oxidation of CO and formate, the oxidation of these substrates coupled to sulfur reduction was observed, processes previously unknown among archaea. The capacities for hydrogenogenic or sulfidogenic oxidation of CO and formate occurred in the studied strains in all possible combinations, which could only in part be explained by peculiarities of organization of genetic determinants revealed in the genomes. Investigation of CO and formate consumption kinetics revealed that T. barophilus strain Ch5 was able to grow at concentrations close to the environmental ones. Thus, it was shown that hyperthermophilic archaea from deep-sea hydrothermal vents are able to utilize one-carbon substrates of abiotic origin both in the presence of an electron acceptor (sulfur) and in its absence. These processes were probably of importance under the conditions of the early Earth biosphere.
Starting Page	400
Ending Page	410
Page Count	11
File Format	PDF
ISSN	00262617
Journal	Microbiology
Volume Number	85
Issue Number	4
e-ISSN	16083237
Language	English
Publisher	Pleiades Publishing
Publisher Date	2016-07-31
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	deep-sea hydrothermal vents hyperthermophiles archaea Thermococcus CO formate hydrogenogenesis sulfur reduction Microbiology Medical Microbiology
Content Type	Text
Resource Type	Article
Subject	Microbiology Applied Microbiology and Biotechnology

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