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Genetic resources for methane production from biomass described with the Gene Ontology

ScholarsArchive at Oregon State University

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Title Genetic resources for methane production from biomass described with the Gene Ontology
Names Purwantini, Endang (creator)
Torto-Alalibo, Trudy (creator)
Lomax, Jane (creator)
Setubal, João C. (creator)
Tyler, Brett M. (creator)
Mukhopadhyay, Biswarup (creator)
Date Issued 2014-12-03 (iso8601)
Note This is the publisher’s final pdf. The published article is copyrighted by the author(s) and published by the Frontiers Research Foundation. The published article can be found at: http://www.frontiersin.org/Microbiology.
Abstract Methane (CH₄) is a valuable fuel, constituting 70–95% of natural gas, and a potent
greenhouse gas. Release of CH₄ into the atmosphere contributes to climate change.
Biological CH₄ production or methanogenesis is mostly performed by methanogens, a
group of strictly anaerobic archaea. The direct substrates for methanogenesis are H₂
plus CO₂, acetate, formate, methylamines, methanol, methyl sulfides, and ethanol or a
secondary alcohol plus CO₂. In numerous anaerobic niches in nature, methanogenesis
facilitates mineralization of complex biopolymers such as carbohydrates, lipids and
proteins generated by primary producers. Thus, methanogens are critical players in the
global carbon cycle. The same process is used in anaerobic treatment of municipal,
industrial and agricultural wastes, reducing the biological pollutants in the wastes and
generating methane. It also holds potential for commercial production of natural gas
from renewable resources. This process operates in digestive systems of many animals,
including cattle, and humans. In contrast, in deep-sea hydrothermal vents methanogenesis
is a primary production process, allowing chemosynthesis of biomaterials from H₂ plus
CO₂. In this report we present Gene Ontology (GO) terms that can be used to describe
processes, functions and cellular components involved in methanogenic biodegradation
and biosynthesis of specialized coenzymes that methanogens use. Some of these GO
terms were previously available and the rest were generated in our Microbial Energy
Gene Ontology (MENGO) project. A recently discovered non-canonical CH₄ production
process is also described. We have performed manual GO annotation of selected
methanogenesis genes, based on experimental evidence, providing “gold standards” for
machine annotation and automated discovery of methanogenesis genes or systems in
diverse genomes. Most of the GO-related information presented in this report is available
at the MENGO website (http://www.mengo.biochem.vt.edu/).
Genre Article
Access Condition http://creativecommons.org/licenses/by/3.0/us/
Topic Gene Ontology
Identifier Purwantini, E., Torto-Alalibo, T., Lomax, J., Setubal, J. C., Tyler, B. M., & Mukhopadhyay, B. (2014). Genetic resources for methane production from biomass described with the Gene Ontology. Frontiers in Microbiology, 5, 634. doi:10.3389/fmicb.2014.00634

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