Recombinant yeasts for effective fermentation of glucose and xylose
First Claim
Patent Images
1. A recombinant yeast containing introduced genes encoding xylose reductase, xylitol dehydrogenase and xylulokinase and which ferments xylose to ethanol.
1 Assignment
0 Petitions
Accused Products
Abstract
Described are recombinant yeasts containing genes encoding xylose reductase, xylitol dehydrogenase and xylulokinase, and DNA molecules, vectors and methods useful for producing such yeasts. The recombinant yeasts effectively ferment xylose to ethanol, and preferred yeasts are capable of simultaneously fermenting glucose and xylose to ethanol thereby taking full advantage of these two sugar sources as they are found in agricultural biomass.
98 Citations
20 Claims
- 1. A recombinant yeast containing introduced genes encoding xylose reductase, xylitol dehydrogenase and xylulokinase and which ferments xylose to ethanol.
- 5. A recombinant DNA molecule comprising genes encoding xylose reductase, xylitol dehydrogenase and xylulokinase.
- 7. A vector effective for transforming yeast and comprising genes encoding xylose reductase, xylitol dehydrogenase and xylulokinase.
- 9. A method for obtaining a recombinant yeast which ferments xylose to ethanol, comprising introducing DNA into a yeast so as to cause the yeast to have introduced genes encoding xylose reductase, xylitol dehydrogenase and xylulokinase.
-
13. A method for fermenting xylose to ethanol, comprising fermenting a xylose-containing medium with a recombinant yeast containing introduced genes encoding xylose reductase, xylitol dehydrogenase and xylulokinase and which ferments xylose to ethanol.
- 16. A method for fermenting glucose to ethanol, comprising fermenting a glucose-containing medium with a recombinant yeast containing introduced genes encoding xylose reductase, xylitol dehydrogenase and xylulokinase and which ferments xylose and glucose to ethanol.
- 19. A recombinant yeast containing genes encoding xylose reductase, xylitol dehydrogenase and xylulokinase, wherein said genes are fused to non-glucose-inhibited promoters and wherein said yeast ferments xylose to ethanol.
Specification