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Title: Global Molecular Analyses of Methane Metabolism in Methanotrophic Alphaproteobacterium, Methylosinus trichosporium OB3b. Part I: Transcriptomic Study

Journal Article · · Frontiers in Microbiology
 [1];  [1];  [2];  [3];  [4]
  1. Univ. of Washington, Seattle, WA (United States). Dept. of Chemical Engineering
  2. Univ. of Alberta, Edmonton, AB (Canada). Dept. of Biological Sciences
  3. Univ. of Washington, Seattle, WA (United States). Dept. of Chemical Engineering; Univ. of Washington, Seattle, WA (United States). eScience Inst.
  4. Univ. of Washington, Seattle, WA (United States). Dept. of Microbiology

Methane utilizing bacteria (methanotrophs) are important in both environmental and biotechnological applications, due to their ability to convert methane to multicarbon compounds. However, systems-level studies of methane metabolism have not been carried out in methanotrophs. In this work we have integrated genomic and transcriptomic information to provide an overview of central metabolic pathways for methane utilization in Methylosinus trichosporium OB3b, a model alphaproteobacterial methanotroph. Particulate methane monooxygenase, PQQ-dependent methanol dehydrogenase, the H4MPT-pathway, and NAD-dependent formate dehydrogenase are involved in methane oxidation to CO2. All genes essential for operation of the serine cycle, the ethylmalonyl-CoA (EMC) pathway, and the citric acid (TCA) cycle were expressed. PEP-pyruvate-oxaloacetate interconversions may have a function in regulation and balancing carbon between the serine cycle and the EMC pathway. A set of transaminases may contribute to carbon partitioning between the pathways. Metabolic pathways for acquisition and/or assimilation of nitrogen and iron are discussed.

Research Organization:
Univ. of Washington, Seattle, WA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division
Grant/Contract Number:
SC0005154
OSTI ID:
1628079
Journal Information:
Frontiers in Microbiology, Vol. 4; ISSN 1664-302X
Publisher:
Frontiers Research FoundationCopyright Statement
Country of Publication:
United States
Language:
English

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Ammonium induces differential expression of methane and nitrogen metabolism-related genes in M ethylocystis sp. strain SC2 : RNA-Seq of a methanotrophic bacterium journal February 2014
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Global Molecular Analyses of Methane Metabolism in Methanotrophic Alphaproteobacterium, Methylosinus trichosporium OB3b. Part II. Metabolomics and 13C-Labeling Study journal January 2013
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