RECOMBINANT YEAST PRODUCING ETHANOL FROM XYLOSE AND METHOD FOR PRODUCING ETHANOL BY USING THE RECOMBINANT YEAST

摘要

The present invention relates to recombinant yeast capable of producing ethanol from xylose at a high yield. More specifically, the present invention relates to: the recombinant yeast into which a gene for coding xylitol dehydrogenase (XDH) derived from Spathaspora passalidarum, a gene for coding xylose reductase (XR), and a gene for coding xylulokinase (XK) derived from Pichia stipites are introduced; and a method for producing ethanol by using the same recombinant yeast. According to the present invention, the recombinant yeast does not accumulate xylitol, which is a byproduct, much and can produce ethanol at a high yield when the recombinant yeast produces ethanol from the cellulose-based biomass containing xylose much. Therefore, the recombinant yeast can be very advantageously used for producing cellulosic ethanol (CE). The method for producing ethanol includes the steps of: (a) producing ethanol by culturing the recombinant yeast on a badge containing xylose; and (b) obtaining ethanol produced by step (a).