C-TERMINAL DOMAIN OF XYLANASE XYNA ORIGINALLY FROM RUMEN AND METHOD FOR IMPROVING XYLANASE CATALYTIC EFFICIENCY

摘要

Provided is a C-terminal domain of xylanase XynA originally from a rumen and a method for improving xylanase catalytic efficiency. A new xylanase with high efficiency is provided. The optimum pH of the xylanase in the present invention is 6.0 and the optimum temperature thereof is 50 degrees centigrade. It is found in the present invention that the C-terminal domain of the xylanase can improve its ability of substrate-degrading, producing more monosaccharides so as to improve its catalytic efficiency. It is found that the function of improving degradation ability is also applied to other xylanases by fusion expression.