H2-dependent formate production by hyperthermophilic Thermococcales: an alternative to sulfur reduction for reducing-equivalents disposal.
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ABSTRACT: Removal of reducing equivalents is an essential catabolic process for all microorganisms to maintain their internal redox balance. The electron disposal by chemoorganotrophic Thermococcales generates H2 by proton reduction or H2S in presence of S0. Although in the absence of S0 growth of these (hyper)thermopiles was previously described to be H2-limited, it remains unclear how Thermococcales could be present in H2-rich S0-depleted habitats. Here, we report that 12 of the 47 strains tested, distributed among all three orders of Thermococcales, could grow without S0 at 0.8 mM dissolved H2 and that tolerance to H2 was always associated with formate production. Two conserved gene clust
SUBMITTER: Le Guellec S
PROVIDER: S-EPMC8630068 | biostudies-literature | 2021 Dec
REPOSITORIES: biostudies-literature
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