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Reverse Methanogenesis and Respiration in Methanotrophic Archaea
Joint Authors
Timmers, Peer H. A.
Welte, Cornelia U.
Koehorst, Jasper J.
Jetten, Mike S. M.
Stams, Alfons J. M.
Plugge, Caroline M.
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-22, 22 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-01-05
Country of Publication
Egypt
No. of Pages
22
Main Subjects
Abstract EN
Anaerobic oxidation of methane (AOM) is catalyzed by anaerobic methane-oxidizing archaea (ANME) via a reverse and modified methanogenesis pathway.
Methanogens can also reverse the methanogenesis pathway to oxidize methane, but only during net methane production (i.e., “trace methane oxidation”).
In turn, ANME can produce methane, but only during net methane oxidation (i.e., enzymatic back flux).
Net AOM is exergonic when coupled to an external electron acceptor such as sulfate (ANME-1, ANME-2abc, and ANME-3), nitrate (ANME-2d), or metal (oxides).
In this review, the reversibility of the methanogenesis pathway and essential differences between ANME and methanogens are described by combining published information with domain based (meta)genome comparison of archaeal methanotrophs and selected archaea.
These differences include abundances and special structure of methyl coenzyme M reductase and of multiheme cytochromes and the presence of menaquinones or methanophenazines.
ANME-2a and ANME-2d can use electron acceptors other than sulfate or nitrate for AOM, respectively.
Environmental studies suggest that ANME-2d are also involved in sulfate-dependent AOM.
ANME-1 seem to use a different mechanism for disposal of electrons and possibly are less versatile in electron acceptors use than ANME-2.
Future research will shed light on the molecular basis of reversal of the methanogenic pathway and electron transfer in different ANME types.
American Psychological Association (APA)
Timmers, Peer H. A.& Welte, Cornelia U.& Koehorst, Jasper J.& Plugge, Caroline M.& Jetten, Mike S. M.& Stams, Alfons J. M.. 2017. Reverse Methanogenesis and Respiration in Methanotrophic Archaea. Archaea،Vol. 2017, no. 2017, pp.1-22.
https://search.emarefa.net/detail/BIM-1125437
Modern Language Association (MLA)
Timmers, Peer H. A.…[et al.]. Reverse Methanogenesis and Respiration in Methanotrophic Archaea. Archaea No. 2017 (2017), pp.1-22.
https://search.emarefa.net/detail/BIM-1125437
American Medical Association (AMA)
Timmers, Peer H. A.& Welte, Cornelia U.& Koehorst, Jasper J.& Plugge, Caroline M.& Jetten, Mike S. M.& Stams, Alfons J. M.. Reverse Methanogenesis and Respiration in Methanotrophic Archaea. Archaea. 2017. Vol. 2017, no. 2017, pp.1-22.
https://search.emarefa.net/detail/BIM-1125437
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1125437