Metabolic engineering strategies for butanol production in Escherichia coli
Reviewartikel, 2020

The global market of butanol is increasing due to its growing applications as solvent, flavoring agent, and chemical precursor of several other compounds. Recently, the superior properties of n-butanol as a biofuel over ethanol have stimulated even more interest. (Bio)butanol is natively produced together with ethanol and acetone by Clostridium species through acetone-butanol-ethanol fermentation, at noncompetitive, low titers compared to petrochemical production. Different butanol production pathways have been expressed in Escherichia coli, a more accessible host compared to Clostridium species, to improve butanol titers and rates. The bioproduction of butanol is here reviewed from a historical and theoretical perspective. All tested rational metabolic engineering strategies in E. coli to increase butanol titers are reviewed: manipulation of central carbon metabolism, elimination of competing pathways, cofactor balancing, development of new pathways, expression of homologous enzymes, consumption of different substrates, and molecular biology strategies. The progress in the field of metabolic modeling and pathway generation algorithms and their potential application to butanol production are also summarized here. The main goals are to gather all the strategies, evaluate the respective progress obtained, identify, and exploit the outstanding challenges.

metabolic engineering


Escherichia coli

genome-scale metabolic models



Sofia Ferreira

Universidade NOVA de Lisboa

Universidade do Minho

Rui Pereira

SilicoLife Lda

Chalmers, Biologi och bioteknik

S. A. Wahl

TU Delft

I. Rocha

Universidade do Minho

Universidade NOVA de Lisboa

Biotechnology and Bioengineering

0006-3592 (ISSN) 1097-0290 (eISSN)

Vol. 117 8 2571-2587



Biokatalys och enzymteknik

Annan industriell bioteknik





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