Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

The Genome of Varunaivibrio sulfuroxidans Strain TC8T, a Metabolically Versatile Alphaproteobacterium from the Tor Caldara Gas Vents in the Tyrrhenian Sea

These authors contributed equally to this work.
Version 1 : Received: 11 April 2023 / Approved: 11 April 2023 / Online: 11 April 2023 (10:31:58 CEST)

A peer-reviewed article of this Preprint also exists.

Patwardhan, S.; Phan, J.; Smedile, F.; Vetriani, C. The Genome of Varunaivibrio sulfuroxidans Strain TC8T, a Metabolically Versatile Alphaproteobacterium from the Tor Caldara Gas Vents in the Tyrrhenian Sea. Microorganisms 2023, 11, 1366. Patwardhan, S.; Phan, J.; Smedile, F.; Vetriani, C. The Genome of Varunaivibrio sulfuroxidans Strain TC8T, a Metabolically Versatile Alphaproteobacterium from the Tor Caldara Gas Vents in the Tyrrhenian Sea. Microorganisms 2023, 11, 1366.

Abstract

Varunaivibrio sulfuroxidans type strain TC8T is a mesophilic, facultatively anaerobic, facultatively chemolithoautotrophic alphaproteobacterium, isolated from a sulfidic shallow-water marine gas vent located at Tor Caldara, Tyrrhenian Sea, Italy. V. sulfuroxidans belongs to the family Thalassospiraceae within the Alphaproteobacteria, with Magnetovibrio blakemorei as its closest relative. The genome of V. sulfuroxidans encodes the genes involved in sulfur, thiosulfate and sulfide oxidation, as well as nitrate and oxygen respiration. The genome encodes the genes involved in carbon fixation via Calvin-Benson-Bassham cycle, in addition to genes involved in glycolysis and TCA cycle, indicating a mixotrophic lifestyle. Genes involved in the detoxification of mercury and arsenate are also present. The genome also encodes a complete flagellar complex, one intact prophage and one CRISPR, as well as a putative DNA uptake mechanism mediated by the type IVc (aka Tad pilus) secretion system. Overall, the genome of Varunaivibrio sulfuroxidans indicates that the bacterium is metabolically versatile and well-adapted to the dynamic environmental conditions of sulfidic gas vents.

Keywords

shallow-water vent; Tyrrhenian Sea; Tor Caldara; chemolithotroph; Alphaproteobacteria; Thalasso-spiraceae; genome; geothermal; sulfur oxidation; DNA uptake; nitrogen fixation; carbon fixation

Subject

Biology and Life Sciences, Life Sciences

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