Metal-dependent anaerobic methane oxidation in marine sediment: Insights from marine settings and other systems

Liang, Lewen; Wang, Yinzhao; Sivan, Orit; Wang, Fengping

doi:10.1007/s11427-018-9554-5

Cited by 31 publications

(26 citation statements)

References 79 publications

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“…To the best of our knowledge, there is no representative pure culture of Fe-AOM microorganisms from the marine sediment ( Liang et al, 2019 ). But some microorganisms were suspected of being related to metal-AOM in various earlier studies, which suggested that ANME-1, ANME-3 ( Beal et al, 2009 ), ANME-2a, 2c ( Scheller et al, 2016 ), ANME-2d ( Methanoperedens nitroreducens ) ( Ettwig et al, 2016 ; Shen et al, 2019 ), Candidatus Methanoperedens ferrireducens ( Cai et al, 2018 ), or Methanosarcina acetivorans ( Yan et al, 2018 ) might be involved in Fe-AOM.…”

Section: Discussionmentioning

confidence: 99%

Niche Differentiation of Sulfate- and Iron-Dependent Anaerobic Methane Oxidation and Methylotrophic Methanogenesis in Deep Sea Methane Seeps

Qinye

Zhou

2020

Front. Microbiol.

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Methane seeps are widespread seafloor ecosystems shaped by complex physicochemical-biological interactions over geological timescales, and seep microbiomes play a vital role in global biogeochemical cycling of key elements on Earth. However, the mechanisms underlying the coexistence of methane-cycling microbial communities remain largely elusive. Here, high-resolution sediment incubation experiments revealed a cryptic methane cycle in the South China Sea (SCS) methane seep ecosystem, showing the coexistence of sulfate (SO 4 2−)-or iron (Fe)-dependent anaerobic oxidation of methane (AOM) and methylotrophic methanogenesis. This previously unrecognized methane cycling is not discernible from geochemical profiles due to high net methane consumption. High-throughput sequencing and Catalyzed Reporter Deposition-Fluorescence in situ Hybridization (CARD-FISH) results suggested that anaerobic methane-oxidizing archaea (ANME)-2 and-3 coupled to sulfatereducing bacteria (SRB) carried out SO 4 2−-AOM, and alternative ANME-2 and-3 solely or coupled to iron-reducing bacteria (IRB) might participate in Fe-AOM in sulfate-depleted environments. This finding suggested that ANME could alter AOM metabolic pathways according to geochemical changes. Furthermore, the majority of methylotrophic methanogens belonged to Methanimicrococcus, and hydrogenotrophic and acetoclastic methanogens were likely inhibited by sulfate or iron respiration. Fe-AOM and methylotrophic methanogenesis are overlooked potential sources and sinks of methane in methane seep ecosystems, thus influencing methane budgets and even the global carbon budget in the ocean.

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Section: Discussionmentioning

confidence: 99%

Niche Differentiation of Sulfate- and Iron-Dependent Anaerobic Methane Oxidation and Methylotrophic Methanogenesis in Deep Sea Methane Seeps

Qinye

Zhou

2020

Front. Microbiol.

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“…Recently it has been discovered that other Ca. Methanoperedens strains coupled AOM to the reduction of iron oxides and other metal oxides (Cai et al, 2018;Liang et al 2019;Leu et al, 2020). (Evans et al, 2015;Vanwonterghem et al, 2016).…”

Section: Diversity and Distribution Of Anaerobic Alkaneoxidizing Archaeamentioning

confidence: 99%

Methyl/alkyl‐coenzyme M reductase‐based anaerobic alkane oxidation in archaea

Wang

Wegener

Ruff

et al. 2020

Environmental Microbiology

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Methyl-coenzyme M reductase (MCR) has been originally identified to catalyse the final step of the methanogenesis pathway. About 20 years ago anaerobic methane-oxidizing archaea (ANME) were discovered that use MCR enzymes to activate methane. ANME thrive at the thermodynamic limit of life, are slow-growing, and in most cases form syntrophic consortia with sulfate-reducing bacteria. Recently, archaea that have the ability to anaerobically oxidize non-methane multi-carbon alkanes such as ethane and n-butane were described in both enrichment cultures and environmental samples. These anaerobic multi-carbon alkane-oxidizing archaea (ANKA) use enzymes homologous to MCR named alkyl-coenzyme M reductase (ACR). Here we review the recent progresses on the diversity, distribution and functioning of both ANME and ANKA by presenting a detailed MCR/ACRbased phylogeny, compare their metabolic pathways and discuss the gaps in our knowledge of physiology of these organisms. To improve our understanding of alkane oxidation in archaea, we identified three directions for future research: (i) expanding cultivation attempts to validate omics-based metabolic models of yet-uncultured organisms, (ii) performing biochemical and structural analyses of key enzymes to understand thermodynamic and steric constraints and (iii) investigating the evolution of anaerobic alkane metabolisms and their impact on biogeochemical cycles.

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“…However, it should be cautioned that the biochemistry of ANME is largely unknown and differences with methanogenic pathways are anticipated ( Timmers et al, 2017 ). Nonetheless, the biochemical-based AOM pathway provides a working model for mechanistic understanding of the growing literature describing respiratory AOM by individual ANME using a variety of electron acceptors including Fe(III) ( Raghoebarsing et al, 2006 ; Beal et al, 2009 ; Haroon et al, 2013 ; Ettwig et al, 2016 ; Cai et al, 2018 ; He et al, 2018 ; Liang et al, 2019 ; Luo et al, 2019 ; Aromokeye et al, 2020 ; Leu et al, 2020 ).…”

Section: Reverse Methanogenesismentioning

confidence: 99%

Methanosarcina acetivorans: A Model for Mechanistic Understanding of Aceticlastic and Reverse Methanogenesis

Ferry

2020

Front. Microbiol.

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Acetate-utilizing methanogens are responsible for approximately two-thirds of the one billion metric tons of methane produced annually in Earth's anaerobic environments. Methanosarcina acetivorans has emerged as a model organism for the mechanistic understanding of aceticlastic methanogenesis and reverse methanogenesis applicable to understanding the methane and carbon cycles in nature. It has the largest genome in the Archaea, supporting a metabolic complexity that enables a remarkable ability for adapting to environmental opportunities and challenges. Biochemical investigations have revealed an aceticlastic pathway capable of fermentative and respiratory energy conservation that explains how Ms. acetivorans is able to grow and compete in the environment. The mechanism of respiratory energy conservation also plays a role in overcoming endothermic reactions that are key to reversing methanogenesis.

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Metal-dependent anaerobic methane oxidation in marine sediment: Insights from marine settings and other systems

Cited by 31 publications

References 79 publications

Niche Differentiation of Sulfate- and Iron-Dependent Anaerobic Methane Oxidation and Methylotrophic Methanogenesis in Deep Sea Methane Seeps

Niche Differentiation of Sulfate- and Iron-Dependent Anaerobic Methane Oxidation and Methylotrophic Methanogenesis in Deep Sea Methane Seeps

Methyl/alkyl‐coenzyme M reductase‐based anaerobic alkane oxidation in archaea

Methanosarcina acetivorans: A Model for Mechanistic Understanding of Aceticlastic and Reverse Methanogenesis

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