TY - JOUR
T1 - Kinetic model of Clostridium beijerinckii's Acetone-Butanol-Ethanol fermentation considering metabolically diverse cell types
AU - Rivas-Astroza, Marcelo
AU - Paredes, Iván
AU - Guerrero, Karlo
AU - Mau, Silvia
AU - Quintero, Julián
AU - Gentina, Juan Carlos
AU - Conejeros, Raúl
AU - Aroca, Germán
N1 - Funding Information:
We acknowledge the funding provided by CONICYT FONDECYT, Chile, through Postdoc grant numbers 3140232 and 3170488, the Project ERANET-LAC ELAC2014/ BEE0249, and the Pontificia Universidad Cat?lica de Valpara?so, Chile.
Funding Information:
We acknowledge the funding provided by CONICYT FONDECYT , Chile, through Postdoc grant numbers 3140232 and 3170488 , the Project ERANET-LAC ELAC2014/ BEE0249, and the Pontificia Universidad Católica de Valparaíso , Chile.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/12/10
Y1 - 2021/12/10
N2 - Clostridium beijerinckii population branches into metabolically diverse cell types in batch cultures. Here, we present a new kinetic model of C. beijerinckii's Acetone-Butanol-Ethanol fermentation that considers three cell types: producers of acids (acidogenic), consumer of acids and producers of solvents (solventogenic), and spores cells. The model accurately recapitulates batch culture data. Also, the model estimates cell type-specific kinetic parameters, which can be helpful to improve the operation of the ABE fermentation and give a framework to study acidogenic and solventogenic metabolic pathways. To exemplify the latter, we used a constraint-based model to study how the ABE pathways are used among acidogenic and solventogenic cell types. We found that among both cell types, glycolytic production of ATP and consumption of NAD+ varies widely during the fermentation, with their maximum production/consumption rates happening when acidogenic and solventogenic growth rates were at their highest. However, acidogenic cells use the ABE pathway to contribute with an extra 12.5% of the total production of ATP, whereas solventogenic cell types use the ABE pathway to supply more than 75% of the demand for NAD+, alternating between the production of lactate and butyrate, being both coupled to the production of NAD+.
AB - Clostridium beijerinckii population branches into metabolically diverse cell types in batch cultures. Here, we present a new kinetic model of C. beijerinckii's Acetone-Butanol-Ethanol fermentation that considers three cell types: producers of acids (acidogenic), consumer of acids and producers of solvents (solventogenic), and spores cells. The model accurately recapitulates batch culture data. Also, the model estimates cell type-specific kinetic parameters, which can be helpful to improve the operation of the ABE fermentation and give a framework to study acidogenic and solventogenic metabolic pathways. To exemplify the latter, we used a constraint-based model to study how the ABE pathways are used among acidogenic and solventogenic cell types. We found that among both cell types, glycolytic production of ATP and consumption of NAD+ varies widely during the fermentation, with their maximum production/consumption rates happening when acidogenic and solventogenic growth rates were at their highest. However, acidogenic cells use the ABE pathway to contribute with an extra 12.5% of the total production of ATP, whereas solventogenic cell types use the ABE pathway to supply more than 75% of the demand for NAD+, alternating between the production of lactate and butyrate, being both coupled to the production of NAD+.
KW - ABE fermentation
KW - Clostridium beijerinckii
KW - Fermentation modelling
KW - Flux balance analysis
UR - http://www.scopus.com/inward/record.url?scp=85117139439&partnerID=8YFLogxK
U2 - 10.1016/j.jbiotec.2021.09.021
DO - 10.1016/j.jbiotec.2021.09.021
M3 - Article
AN - SCOPUS:85117139439
VL - 342
SP - 1
EP - 12
JO - Journal of Biotechnology
JF - Journal of Biotechnology
SN - 0168-1656
ER -