Metabolic redundancy and specialisation of novel sulfide-oxidizing Sulfurimonas and Sulfurovum along the brine-seawater interface of the Kebrit Deep

Environmental Microbiome, Journal Year: 2025, Volume and Issue: 20(1)

Published: Feb. 5, 2025

Members of the Campylobacterota phylum are dominant key players in sulfidic environments, where they make up a stable portion sulfide-oxidizing bacterial communities. Despite significance these bacteria primary production being well recognised several ecosystems, their genomic and metabolic traits deep hypersaline anoxic basins (DHABs) remain largely unexplored. This knowledge gap not only hampers our understanding adaptation functional role DHABs but also ecological interactions with other microorganisms unique ecosystems. Metabolic reconstructions from metagenome-assembled genomes (MAGs) were conducted at 10 cm spatial resolution within halocline brine-seawater interface (BSI, salinity 91–155 PSU) 1466 m Kebrit Deep Red Sea. Fifty-four MAGs assembled dereplicated into three distinct groups, highest-quality genome retained as representative. These represent novel species Sulfurimonas Sulfurovum genera, which differ those found mildly saline deep-sea pools. They stratified along BSI utilise reductive tricarboxylic acid cycle to fix carbon dioxide, acting producers. Their energy generation processes include aerobic or anaerobic-nitrate-dependent sulfide oxidation, hydrogen oxidation. In addition osmoprotectant pathways commonly observed Campylobacterota, such synthesis uptake proline glutamate, two exhibit signatures for ectoine synthesis, further aiding high salinity. combination redundancy specialisation confined boundaries (~1 m) is pivotal governing microbial interactions, including sulfate-reducers, heterotrophs, results show how selective pressures mediated by conditions have resulted novel, adapted metabolically redundant that contribute coupling, nutrient turnover continuity physico-chemical gradient BSI.

Language: Английский

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Decrypting the phylogeny and metabolism of microbial dark matter in green and red Antarctic snow

ISME Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 10, 2025

Antarctic snow harbors diverse microorganisms, including pigmented algae and bacteria, which create colored patches influence global climate biogeochemical cycles. However, the genomic diversity metabolic potential of remain poorly understood. We conducted a genome-resolved study microbiomes in from 13 (7 green 6 red) on Fildes Peninsula, Antarctica. Using metagenome assembly binning, we reconstructed 223 metagenome-assembled genomes (MAGs), with 91% representing previously unexplored microbes. Green (GS) red (RS) showed distinct MAGs profile, Polaromonas Ferruginibacter as most abundant genera, respectively. GS exhibited higher alpha more unique enriched MAGs, while RS greater variability beta diversity. All contained genes encoding auxiliary activities (AAs), carbohydrate esterases (CEs), glycoside hydrolases (GHs), glycosyl transferases (GTs), indicating microbial degradation complex carbon substrates. The enzymes included GT2 (cellulose synthase), GT4 (sucrose CE1 (acetyl xylan esterase), GT41 (peptide beta-N-acetylglucosaminyltransferase), CE10 (arylesterase). had abundance GTs, whereas was GHs. Furthermore, 56% for inorganic nitrogen cycling, 18 gene families involved assimilatory nitrate reduction, dissimilatory denitrification. Potential coupling cycling metabolism observed at both genome community levels, suggesting close links between these pathways, particularly through reduction during degradation. This enhances our understanding functions polar ecosystems highlights their roles maintaining ecological stability.

Language: Английский

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Shifts of abundance and community composition of nitrifying microbes along the Changjiang Estuary to the East China Sea

World Journal of Microbiology and Biotechnology, Journal Year: 2025, Volume and Issue: 41(2)

Published: Jan. 20, 2025

Language: Английский

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Covalent organic frameworks supported geminal-atom catalysts for upcycling nitrate into single-cell protein

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160681 - 160681

Published: Feb. 1, 2025

Language: Английский

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Effects of C/N ratio on performance, enzyme activity and microbial community in a bacteria-algal symbiotic MBBR for mariculture wastewater treatment

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 115820 - 115820

Published: Feb. 1, 2025

Language: Английский

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Antarctic bacterial natural products: from genomic insights to drug discovery

Natural Product Reports, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

The article highlights the available data on Antarctic bacteria, their biosynthetic potential, and successful NP discoveries while addressing challenges in research advocating for systematic, collaborative Antarctica.

Language: Английский

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Soil comammox Nitrospira dominates over ammonia-oxidizing archaea and bacteria in the invasion of Solidago canadensis

Plant and Soil, Journal Year: 2025, Volume and Issue: unknown

Published: March 4, 2025

Language: Английский

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Copper contamination determined the impact of phages on microbially-driven nitrogen cycling in coastal wetland sediments

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: unknown, P. 137870 - 137870

Published: March 1, 2025

Language: Английский

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Metagenome‐Assembled Genomes for Oligotrophic Nitrifiers From a Mountainous Gravelbed Floodplain

Environmental Microbiology, Journal Year: 2025, Volume and Issue: 27(3)

Published: March 1, 2025

ABSTRACT Riparian floodplains are important regions for biogeochemical cycling, including nitrogen. Here, we present MAGs from nitrifying microorganisms, ammonia‐oxidising archaea (AOA) and comammox bacteria Slate River (SR) floodplain sediments (Crested Butte, CO, US). Additionally, explore potential nitrite‐oxidising (NOB) the Nitrospirales . AOA diversity in SR is lower than observed other western US Nitrosotalea ‐like lineages such as genus TA‐20 dominant AOA. No (AOB) were recovered. Microorganisms Palsa‐1315 (clade B comammox) most abundant ammonia‐oxidizers sediments. Established NOB conspicuously absent; however, recovered uncultured of NS‐4 family ( ) Nitrospiraceae that propose putative NOB. Nitrite oxidation may be carried out by organisms sister to established Nitrospira based on genomic content clades. Nitrifier harbour genes using alternative sources ammonia, urea, cyanate, biuret, triuret nitriles. The therefore appears a low ammonia flux environment selects oligotrophic nitrifiers.

Language: Английский

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Sedimentary recorded nitrogen-transforming microbes reflect climate fluctuations in a glacial lake on the Qinghai-Tibetan Plateau over a millennium timescale

Journal of Great Lakes Research, Journal Year: 2025, Volume and Issue: unknown, P. 102579 - 102579

Published: April 1, 2025

Language: Английский

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