Comparison of xylose fermentation by two high-performance engineered strains of Saccharomyces cerevisiae
Journal Article
·
· Biotechnology Reports (Online)
- Univ. of California, Berkeley, CA (United States). Dept. of Molecular and Cell Biology; DOE/OSTI
- Univ. of California, Berkeley, CA (United States). Dept. of Molecular and Cell Biology
- Univ. of Illinois at Urbana-Champaign, IL (United States). Inst. for Genomic Biology
- Univ. of Illinois at Urbana-Champaign, IL (United States). Inst. for Genomic Biology; Univ. of Illinois at Urbana-Champaign, IL (United States). Dept. of Food and Science and Human Nutrition
- Univ. of California, Berkeley, CA (United States). Dept. of Molecular and Cell Biology; Univ. of California, Berkeley, CA (United States). Dept. of Chemistry; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Physical Bioscience Division
Economical biofuel production from plant biomass requires the conversion of both cellulose and hemicellulose in the plant cell wall. The best industrial fermentation organism, the yeast Saccharomyces cerevisiae, has been developed to utilize xylose by heterologously expressing either a xylose reductase/ xylitol dehydrogenase (XR/XDH) pathway or a xylose isomerase (XI) pathway. Although it has been proposed that the optimal means for fermenting xylose into biofuels would use XI instead of the XR/XDH pathway, no clear comparison of the best publicly-available yeast strains engineered to use XR/XDH or XI has been published. We therefore compared two of the best-performing engineered yeast strains in the public domain—one using the XR/XDH pathway and another using XI—in anaerobic xylose fermentations. We find that, regardless of conditions, the strain using XR/XDH has substantially higher productivity compared to the XI strain. By contrast, the XI strain has better yields in nearly all conditions tested.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- Energy Biosciences Institute; USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1629588
- Journal Information:
- Biotechnology Reports (Online), Journal Name: Biotechnology Reports (Online) Journal Issue: C Vol. 9; ISSN 2215-017X
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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