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    Author(s): B.S. Dien; M.A. Cotta; T.W. Jeffries
    Date: 2003
    Source: Applied microbiology and biotechnology. Vol. 63 (2003): Pages 258-266
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (113 KB)

    Description

    The lack of industrially suitable microorganisms for converting biomass into fuel ethanol has traditionally been cited as a major technical roadblock to developing a bioethanol industry. In the last two decades, numerous microorganisms have been engineered to selectively produce ethanol. Lignocellulosic biomass contains complex carbohydrates that necessitate utilizing microorganisms capable of fermenting sugars not fermentable by brewers' yeast. The most significant of these is xylose. The greatest successes have been in the engineering of Gram-negative bacteria: Escherichia coli, Klebsiella oxytoca, and Zymomonas mobilis. E. coli and K. oxytoca are naturally able to use a wide spectrum of sugars, and work has concentrated on engineering these strains to selectively produce ethanol. Z. mobilis produces ethanol at high yields, but ferments only glucose and fructose. Work on this organism has concentrated on introducing pathways for the fermentation of arabinose and xylose. The history of constructing these strains and current progress in refining them are detailed in this review.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Dien, B.S.; Cotta, M.A.; Jeffries, T.W. 2003. Bacteria engineered for fuel ethanol production: current status. Applied microbiology and biotechnology. Vol. 63 (2003): Pages 258-266

    Keywords

    Bacteria, fuel production, ethanol production, biomass conversion

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