Direct Methane Oxidation by Copper- and Iron-Dependent Methane Monooxygenases

Chemical Reviews, Год журнала: 2024, Номер 124(3), С. 1288 - 1320

Опубликована: Фев. 2, 2024

Methane is a potent greenhouse gas that contributes significantly to climate change and primarily regulated in Nature by methanotrophic bacteria, which consume methane as their source of energy carbon, first oxidizing it methanol. The direct oxidation methanol chemically difficult transformation, accomplished methanotrophs complex monooxygenase (MMO) enzyme systems. These enzymes use iron or copper metallocofactors have been the subject detailed investigation. While structure, function, active site architecture copper-dependent particulate (pMMO) investigated extensively, its putative quaternary interactions, regulation, requisite cofactors, mechanism remain enigmatic. iron-dependent soluble (sMMO) has characterized biochemically, structurally, spectroscopically, and, for most part, mechanistically. Here, we review history MMO research, focusing on recent developments providing an outlook future directions field. Engineered biological catalysis systems bioinspired synthetic catalysts may continue emerge along with deeper understanding molecular mechanisms oxidation. Harnessing power these will necessitate combined efforts biochemistry, structural biology, inorganic chemistry, microbiology, computational engineering.

Язык: Английский

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How to Provide Nitrite Robustly for Anaerobic Ammonium Oxidation in Mainstream Nitrogen Removal

Environmental Science & Technology, Год журнала: 2023, Номер 57(51), С. 21503 - 21526

Опубликована: Дек. 14, 2023

Innovation in decarbonizing wastewater treatment is urgent response to global climate change. The practical implementation of anaerobic ammonium oxidation (anammox) treating domestic the key reconciling carbon-neutral management with sustainable development. Nitrite availability prerequisite anammox reaction, but how achieve robust nitrite supply and accumulation for mainstream systems remains elusive. This work presents a state-of-the-art review on recent advances anammox, paying special attention available pathways (forward-going (from nitrite) backward-going nitrate nitrite)), controlling strategies, physiological ecological characteristics functional microorganisms involved supply. First, we comprehensively assessed nitrite-oxidizing bacteria control methods, outlining that these technologies are transitioning possessing multiple selective pressures (such as intermittent aeration membrane-aerated biological reactor), integrating side stream free ammonia/free nitrous acid suppression recirculated sludge treatment), maintaining high activity ammonia-oxidizing competing oxygen bacteria. We then highlight emerging strategies supply, including production driven by novel microbes (ammonia-oxidizing archaea complete ammonia bacteria) reduction (partial denitrification nitrate-dependent methane oxidation). resources requirement different analyzed, hybrid pathway combining partial nitrification encouraged. Moreover, data-driven modeling process well proactive microbiome proposed hope achieving application. Finally, existing challenges further perspectives highlighted, i.e., investigation nitrite-supplying bacteria, scaling-up from laboratory under real conditions, stable performance fundamental insights this aim inspire advance our understanding about provide robustly shed light important obstacles warranting settlement.

Язык: Английский

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Sustainable Energy Resources for Driving Methane Conversion

Advanced Energy Materials, Год журнала: 2023, Номер 13(36)

Опубликована: Авг. 13, 2023

Abstract The conversion of methane to value‐added chemicals by traditional reforming processes suffers from intensive energy consumption due its particularly strong C─H bonds. Thus, it is urgent optimize the driving force structure for accelerating integration sustainable energy. In this review, advances in energy‐driven are systematically summarized provide a scientific understanding operation/storage concepts, reactor design, technological maturity, system optimization, and remaining issues. Furthermore, essence, economic evaluations, balance, social impacts driven carefully discussed, paving path future course research development. Diversifying mix can play an important role industries, being used as crucial step transition energy, especially combination solar/nuclear with fossil fuels produce chemicals. Additionally, review intends bridge studies development, ultimate goal offering robust framework understand current status guidance design solutions greener future.

Язык: Английский

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Multi-heme cytochrome-mediated extracellular electron transfer by the anaerobic methanotroph ‘Candidatus Methanoperedens nitroreducens’

Nature Communications, Год журнала: 2023, Номер 14(1)

Опубликована: Сен. 30, 2023

Anaerobic methanotrophic archaea (ANME) carry out anaerobic oxidation of methane, thus playing a crucial role in the methane cycle. Previous genomic evidence indicates that multi-heme c-type cytochromes (MHCs) may facilitate extracellular electron transfer (EET) from ANME to different sinks. Here, we provide experimental supporting cytochrome-mediated EET for reduction metals and electrodes by 'Candidatus Methanoperedens nitroreducens', an acclimated nitrate reduction. Ferrous iron-targeted fluorescent assays, metatranscriptomics, single-cell imaging suggest 'Ca. M. nitroreducens' uses surface-localized redox-active metal Electrochemical Raman spectroscopic analyses also support involvement electrode Furthermore, several genes encoding menaquinone cytochrome type-c oxidoreductases MHCs are differentially expressed when acceptors used.

Язык: Английский

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Energy-efficient and carbon neutral anammox-based nitrogen removal by coupling with nitrate reduction pathways: A review

The Science of The Total Environment, Год журнала: 2023, Номер 889, С. 164213 - 164213

Опубликована: Май 15, 2023

Язык: Английский

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Direct Methane to Methanol Conversion: An Overview of Non‐Syn Gas Catalytic Strategies

The Chemical Record, Год журнала: 2025, Номер unknown

Опубликована: Янв. 16, 2025

Abstract Direct methane to methanol conversion is a dream reaction in industrial chemistry, which takes inspiration from the biological production catalysed by monooxygenase enzymes (MMOs). Over years, extensive studies have been conducted on this topic bioengineering MMOs, and tailoring methods isolate MMOs active form. Similarly, remarkable achievements noted other activation strategies such as use of heterogeneous catalysts or molecular catalysts. In review, we outline metabolism performed methanotrophs detail latest advancements site structures catalytic mechanisms both types MMOs. Also, recent progress bioinspired approaches using various catalysts, especially first‐row transition metal zeolites mechanistic insights are discussed. addition, complexes “Periana catalyst” for through methyl ester formation presence strong acids also detailed. Compared zeolites‐mediated field, utilisation application still its nascent phase further research required overcome limitations these effectively.

Язык: Английский

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Manganese-mediated dissimilatory nitrate reduction to ammonium of nitrate-dependent anaerobic methane oxidation

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 159901 - 159901

Опубликована: Янв. 1, 2025

Язык: Английский

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Effluent organic matter facilitates anaerobic methane oxidation coupled with nitrous oxide reduction in river sediments

Water Research, Год журнала: 2025, Номер unknown, С. 123415 - 123415

Опубликована: Фев. 1, 2025

Язык: Английский

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Current Progress on Methods and Technologies for Catalytic Methane Activation at Low Temperatures

Advanced Science, Год журнала: 2022, Номер 10(5)

Опубликована: Дек. 11, 2022

Methane (CH

Язык: Английский

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The role of electron donors in arsenic-release by redox-transformation of iron oxide minerals – A review

Chemical Geology, Год журнала: 2023, Номер 619, С. 121322 - 121322

Опубликована: Янв. 18, 2023

The contamination of groundwater by geogenic arsenic affects the health tens millions people, especially in South and Southeast Asia. primary cause highly reducing alluvial deltaic aquifers Asia, is thought to be microbial reduction Fe(III) As(V) (more mobile) Fe(II) As(III), respectively. Key understanding Fe(III)/As(V) process aquifers, identity source electron donors driving system – this has been a key area research within biogeochemistry last two decades. Studies can broadly divided into three approaches: 1) field-based, which include organic geochemical analysis aquifer samples deduce composition potential sources (by variety techniques proxies), and/or multiple biogeochemical parameters (microbes, genes, inorganic geochemistry) combined with multivariate statistical analysis; 2) microcosm-based, where reductive dissolution mechanism studied laboratory-scale incubation experiments, (including donor type availability) manipulated, effects monitored; 3) in-situ experiments using mineral phases deployed aquifers. Here we review studies aforementioned approaches address questions: (i) What are present aquifers? (ii) environmental donors? (iii) Which have directly implicated release We find that available (and utilised), depend on number site-specific factors, including geomorphological setting, sediment lithology, metabolic communities present. A wide range implicated, dissolved labile matter, methane ammonium. In conclusion, highlight need for further multidisciplinary investigations combine state-of-the-art analyses, mineralogical analyses future studies, ideally conducted in-situ.

Язык: Английский

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