Dual energy metabolism of the Campylobacterota endosymbiont in the chemosynthetic snail Alviniconcha marisindica.

ABSTRACT: Some deep-sea chemosynthetic invertebrates and their symbiotic bacteria can use molecular hydrogen (H₂) as their energy source. However, how much the chemosynthetic holobiont (endosymbiont-host association) physiologically depends on H₂ oxidation has not yet been determined. Here, we demonstrate that the Campylobacterota endosymbionts of the gastropod Alviniconcha marisindica in the Kairei and Edmond fields (kAlv and eAlv populations, respectively) of the Indian Ocean, utilize H₂ in response to their physical and environmental H₂ conditions, although the 16S rRNA gene sequence of both the endosymbionts shared 99.6% identity. A thermodynamic calculation using in situ H₂ and hydrogen sulfide (H₂S) concentrations indicated that

SUBMITTER: Miyazaki J 

PROVIDER: S-EPMC7174374 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature