Journal article
A Genome-Scale Metabolic Model for Methylococcus capsulatus (Bath) Suggests Reduced Efficiency Electron Transfer to the Particulate Methane Monooxygenase
Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark1
Department of Chemical and Biochemical Engineering, Technical University of Denmark2
PROSYS - Process and Systems Engineering Centre, Department of Chemical and Biochemical Engineering, Technical University of Denmark3
Global Econometric Modeling, Research Groups, Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark4
Research Groups, Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark5
iLoop, Translational Management, Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark6
Genome-scale metabolic models allow researchers to calculate yields, to predict consumption and production rates, and to study the effect of genetic modifications in silico, without running resource-intensive experiments. While these models have become an invaluable tool for optimizing industrial production hosts like E. coli and S. cerevisiae, few such models exist for one-carbon (C1) metabolizers.
Here we present a genome-scale metabolic model for Methylococcus capsulatus (Bath), a well-studied obligate methanotroph, which has been used as a production strain of single cell protein (SCP). The model was manually curated, and spans a total of 879 metabolites connected via 913 reactions. The inclusion of 730 genes and comprehensive annotations, make this model not only a useful tool for modeling metabolic physiology, but also a centralized knowledge base for M. capsulatus (Bath).
With it, we determined that oxidation of methane by the particulate methane monooxygenase could be driven both through direct coupling or uphill electron transfer, both operating at reduced efficiency, as either scenario matches well with experimental data and observations from literature. The metabolic model will serve the ongoing fundamental research of C1 metabolism, and pave the way for rational strain design strategies towards improved SCP production processes in M. capsulatus.
Language: | English |
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Publisher: | Frontiers Media S.A. |
Year: | 2018 |
Pages: | 2947 |
ISSN: | 1664302x |
Types: | Journal article |
DOI: | 10.3389/fmicb.2018.02947 |
ORCIDs: | Lieven, Christian , Jørgensen, Sten Bay , Gernaey, Krist V. , Herrgard, Markus J. and Sonnenschein, Nikolaus |