Mutated xylose reductase boosts bioethanol from wheat straw
Author Information
Author(s): Olofsson Kim, Runquist David, Hahn-Hägerdal Bärbel, Lidén Gunnar
Primary Institution: Lund University
Hypothesis
Can a mutated xylose reductase improve ethanol production in simultaneous fermentation of wheat straw?
Conclusion
The study found that using a mutated xylose reductase significantly increased xylose uptake and ethanol yield compared to the native variant.
Supporting Evidence
- The xylose conversion in SSCF was doubled with the S. cerevisiae strain expressing mXR compared to the native XR.
- The ethanol yield increased from 0.33 to 0.39 g g-1 when the native XR was replaced by mXR.
- The expression of Gxf1 only slightly increased the xylose uptake and did not increase the ethanol production.
Takeaway
Scientists changed a yeast enzyme to help it make more alcohol from plant sugar, and it worked really well! This means we can make more fuel from plants.
Methodology
The study used genetically engineered yeast strains in simultaneous saccharification and co-fermentation of acid-pretreated wheat straw.
Limitations
The study was conducted under specific conditions that may not fully represent industrial processes.
Digital Object Identifier (DOI)
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