Genome-Scale, Constraint-Based Modeling of Nitrogen Oxide Fluxes during Coculture of Nitrosomonas europaea and Nitrobacter winogradskyi
- Oregon State Univ., Corvallis, OR (United States). Dept. of Botany and Plant Pathology; DOE/OSTI
- Oregon State Univ., Corvallis, OR (United States). Dept. of Crop and Soil Science
- Oregon State Univ., Corvallis, OR (United States). Biological and Ecological Engineering
- Oregon State Univ., Corvallis, OR (United States). Dept. of Crop and Soil Science; Oregon State Univ., Corvallis, OR (United States). Dept. of Microbiology
- Oregon State Univ., Corvallis, OR (United States). Dept. of Botany and Plant Pathology
Nitrification, the aerobic oxidation of ammonia to nitrate via nitrite, emits nitrogen (N) oxide gases (NO, NO2, and N2O), which are potentially hazardous compounds that contribute to global warming. To better understand the dynamics of nitrification-derived N oxide production, we conducted culturing experiments and used an integrative genome-scale, constraint-based approach to model N oxide gas sources and sinks during complete nitrification in an aerobic coculture of two model nitrifying bacteria, the ammonia-oxidizing bacterium Nitrosomonas europaea and the nitrite-oxidizing bacterium Nitrobacter winogradskyi. The model includes biotic genome-scale metabolic models (iFC578 and iFC579) for each nitrifier and abiotic N oxide reactions. Modeling suggested both biotic and abiotic reactions are important sources and sinks of N oxides, particularly under microaerobic conditions predicted to occur in coculture. In particular, integrative modeling suggested that previous models might have underestimated gross NO production during nitrification due to not taking into account its rapid oxidation in both aqueous and gas phases. The integrative model may be found at https://github.com/chaplenf/microBiome-v2.1.
- Research Organization:
- Oregon State Univ., Corvallis, OR (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); USDA; USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1626174
- Journal Information:
- mSystems, Journal Name: mSystems Journal Issue: 3 Vol. 3; ISSN 2379-5077
- Publisher:
- American Society for MicrobiologyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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