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Microbial solvent formation revisited by comparative genome analysis

Poehlein, Anja; Solano, Jos� David Montoya; Flitsch, Stefanie K.; Krabben, Preben; Winzer, Klaus; Reid, Sharon J.; Jones, David T.; Green, Edward; Minton, Nigel P.; Daniel, Rolf; D�rre, Peter

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Anja Poehlein

Jos� David Montoya Solano

Stefanie K. Flitsch

Preben Krabben

Sharon J. Reid

David T. Jones

Edward Green

Rolf Daniel

Peter D�rre


Background: Microbial formation of acetone, isopropanol, and butanol is largely restricted to bacteria belonging to the genus Clostridium. This ability has been industrially exploited over the last 100 years. The solvents are important feedstocks for the chemical and biofuel industry. However, biological synthesis suffers from high substrate costs and competition from chemical synthesis supported by the low price of crude oil. To render the biotechnological production economically viable again, improvements in microbial and fermentation performance are necessary. However, no comprehensive comparisons of respective species and strains used and their specific abilities exist today.
Results: The genomes of a total 30 saccharolytic Clostridium strains, representative of the species Clostridium acetobutylicum, C. aurantibutyricum, C. beijerinckii, C. diolis, C. felsineum, C. pasteurianum, C. puniceum, C. roseum, C. saccharobutylicum, and C. saccharoperbutylacetonicum, have been determined; 10 of them completely, and compared to 14 published genomes of other solvent-forming clostridia. Two major groups could be differentiated and several misclassified species were detected.
Conclusions: Our findings represent a comprehensive study of phylogeny and taxonomy of clostridial solvent producers that highlights differences in energy conservation mechanisms and substrate utilization between strains, and allow for the first time a direct comparison of sequentially selected industrial strains at the genetic level. Detailed data mining is now possible, supporting the identification of new engineering targets for improved solvent production.


Poehlein, A., Solano, J. D. M., Flitsch, S. K., Krabben, P., Winzer, K., Reid, S. J., …Dürre, P. (2017). Microbial solvent formation revisited by comparative genome analysis. Biotechnology for Biofuels, 10, Article 58.

Journal Article Type Article
Acceptance Date Feb 28, 2017
Online Publication Date Mar 9, 2017
Publication Date Mar 9, 2017
Deposit Date Dec 7, 2018
Publicly Available Date Dec 10, 2018
Journal Biotechnology for Biofuels
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
Volume 10
Article Number 58
Public URL
Publisher URL
Contract Date Dec 10, 2018


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