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Title: Metals and Methanotrophy

Abstract

ABSTRACTAerobic methanotrophs have long been known to play a critical role in the global carbon cycle, being capable of converting methane to biomass and carbon dioxide. Interestingly, these microbes exhibit great sensitivity to copper and rare-earth elements, with the expression of key genes involved in the central pathway of methane oxidation controlled by the availability of these metals. That is, these microbes have a “copper switch” that controls the expression of alternative methane monooxygenases and a “rare-earth element switch” that controls the expression of alternative methanol dehydrogenases. Further, it has been recently shown that some methanotrophs can detoxify inorganic mercury and demethylate methylmercury; this finding is remarkable, as the canonical organomercurial lyase does not exist in these methanotrophs, indicating that a novel mechanism is involved in methylmercury demethylation. Here, we review recent findings on methanotrophic interactions with metals, with a particular focus on these metal switches and the mechanisms used by methanotrophs to bind and sequester metals.

Authors:
 [1];  [2];  [1];  [3];  [4]
  1. Univ. of Michigan, Ann Arbor, MI (United States)
  2. Iowa State Univ., Ames, IA (United States)
  3. Korea Advanced Inst. Science and Technology (KAIST), Daejeon (South Korea)
  4. Univ. of Illinois, Urbana-Champaign, IL (United States)
Publication Date:
Research Org.:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER); National Science Foundation (NSF)
OSTI Identifier:
1503609
Alternate Identifier(s):
OSTI ID: 1691494
Grant/Contract Number:  
SC0018059
Resource Type:
Accepted Manuscript
Journal Name:
Applied and Environmental Microbiology
Additional Journal Information:
Journal Volume: 84; Journal Issue: 6; Journal ID: ISSN 0099-2240
Publisher:
American Society for Microbiology
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; 36 MATERIALS SCIENCE; methanotrophy; methanobactin; copper; mercury; rare-earth elements; 54 ENVIRONMENTAL SCIENCES; methanotropy, methanobactin, metals, methane

Citation Formats

Semrau, Jeremy D., DiSpirito, Alan A., Gu, Wenyu, Yoon, Sukhwan, and Cann, Isaac. Metals and Methanotrophy. United States: N. p., 2018. Web. doi:10.1128/aem.02289-17.
Semrau, Jeremy D., DiSpirito, Alan A., Gu, Wenyu, Yoon, Sukhwan, & Cann, Isaac. Metals and Methanotrophy. United States. https://doi.org/10.1128/aem.02289-17
Semrau, Jeremy D., DiSpirito, Alan A., Gu, Wenyu, Yoon, Sukhwan, and Cann, Isaac. Fri . "Metals and Methanotrophy". United States. https://doi.org/10.1128/aem.02289-17. https://www.osti.gov/servlets/purl/1503609.
@article{osti_1503609,
title = {Metals and Methanotrophy},
author = {Semrau, Jeremy D. and DiSpirito, Alan A. and Gu, Wenyu and Yoon, Sukhwan and Cann, Isaac},
abstractNote = {ABSTRACTAerobic methanotrophs have long been known to play a critical role in the global carbon cycle, being capable of converting methane to biomass and carbon dioxide. Interestingly, these microbes exhibit great sensitivity to copper and rare-earth elements, with the expression of key genes involved in the central pathway of methane oxidation controlled by the availability of these metals. That is, these microbes have a “copper switch” that controls the expression of alternative methane monooxygenases and a “rare-earth element switch” that controls the expression of alternative methanol dehydrogenases. Further, it has been recently shown that some methanotrophs can detoxify inorganic mercury and demethylate methylmercury; this finding is remarkable, as the canonical organomercurial lyase does not exist in these methanotrophs, indicating that a novel mechanism is involved in methylmercury demethylation. Here, we review recent findings on methanotrophic interactions with metals, with a particular focus on these metal switches and the mechanisms used by methanotrophs to bind and sequester metals.},
doi = {10.1128/aem.02289-17},
journal = {Applied and Environmental Microbiology},
number = 6,
volume = 84,
place = {United States},
year = {Fri Jan 05 00:00:00 EST 2018},
month = {Fri Jan 05 00:00:00 EST 2018}
}

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Cited by: 89 works
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Figures / Tables:

FIG 1 FIG 1: Phylogenetic distribution of aerobic methanotrophic genera. 16S rRNA sequence alignment was generated using the SILVA aligner (164) and used to construct a maximum likelihood tree based on the Tamura-Nei model in MEGA7 (165). For the sake of brevity, methanotrophic species are not listed. For a thorough list/description ofmore » validated aerobic methanotrophic species, the reader is directed to reference 6. It should be noted that to date, no type strains have been isolated/purified from the Clonothrix, Crenothrix, or Methylomirabilis genus.« less

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Works referencing / citing this record:

Lanthanide-Dependent Methylotrophs of the Family Beijerinckiaceae : Physiological and Genomic Insights
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Novel facultative Methylocella strains are active methane consumers at terrestrial natural gas seeps
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Rare Earth Elements Alter Redox Balance in Methylomicrobium alcaliphilum 20ZR
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Understanding the chemistry of the artificial electron acceptors PES, PMS, DCPIP and Wurster’s Blue in methanol dehydrogenase assays
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Isolation and Genomic Characterization of a Proteobacterial Methanotroph Requiring Lanthanides
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The PedS2/PedR2 two-component system is crucial for the rare earth element switch in Pseudomonas putida KT2440
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Rare earth element (REE)-dependent growth of Pseudomonas putida KT2440 relies on the ABC-transporter PedA1A2BC and is influenced by iron availability
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Extracellular Electron Transfer via Outer Membrane Cytochromes in a Methanotrophic Bacterium Methylococcus capsulatus (Bath)
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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.