Description and genome analysis of a novel archaeon isolated from a syntrophic pyrite-forming enrichment culture and reclassification of Methanospirillum hungatei strains GP1 and SK as Methanospirillum purgamenti sp. nov.
Journal
PloS one
ISSN: 1932-6203
Titre abrégé: PLoS One
Pays: United States
ID NLM: 101285081
Informations de publication
Date de publication:
2024
2024
Historique:
received:
15
03
2024
accepted:
23
07
2024
medline:
27
8
2024
pubmed:
26
8
2024
entrez:
26
8
2024
Statut:
epublish
Résumé
The archaeal isolate J.3.6.1-F.2.7.3T was obtained from an anaerobic enrichment culture, where it may play an important role in methane production during pyrite formation. The new isolate formed a species-level clade with Methanospirillum hungatei strains GP1 and SK, which is separate from the type strain JF-1T. Cultivation-independent surveys indicate the occurrence of this phylogenetic group in sediments and anaerobic digesters. The abundance of this clade appears to be negatively affected by high nitrogen loads, indicating a sensitivity to certain nitrogen compounds that is not known in M. hungatei JF-1T. The relatively large core genome of this Methanospirillum clade is indicative of niche specialization and efficient control of horizontal gene transfer. Genes for nitrogenase and F420-dependent secondary alcohol dehydrogenase contribute to the metabolic versatility of this lineage. Characteristics of the new isolate such as the ability to utilize 2-propanol as an electron donor or the requirement for acetate as a carbon source are found also in the strains GP1 and SK, but not in the type strain M. hungatei JF-1T. Based on the genomic differences to related species, a new species within the genus Methanospirillum is proposed with the name M. purgamenti sp. nov. The determined phenotypic characteristics support this proposal and indicate a metabolic adaptation to a separate ecological niche.
Identifiants
pubmed: 39186748
doi: 10.1371/journal.pone.0308405
pii: PONE-D-24-10513
doi:
Substances chimiques
Sulfides
0
Iron
E1UOL152H7
RNA, Ribosomal, 16S
0
Methane
OP0UW79H66
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e0308405Informations de copyright
Copyright: © 2024 Pradel et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Déclaration de conflit d'intérêts
The authors have declared that no competing interests exist.
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