PURIFIED AND ISOLATED DNA SEQUENCE ENCODING A POLYPEPTIDE OF XYLANASE ACTIVITY AND METHOD OF OBTAINING SUCH SEQUENCE; DNA EXPRESSION STRUCTURE, METHOD OF OBTAINING SAME, TRANSFORMED HOST OF MICROBIAL ORIGIN AND METHOD OF OBTAINING SAME; METHOD OF XYLANASE ACTIVITY POLYPEPTIDE HYPEREXPRESSION, POLYPEPTIDE OF XSYLANASE ACTIVITY AND APPLICATION OF SUCH POLYPEPTIDE; ANIMAL FEED AND METHOD OF OBTAINING SAME; DOUGH FOR BAKING BREAD; METHOD OF DEGRADATING PRODUCTS CONTAINING XYLANES ...

摘要

Methods and expression constructs are provided for the cloning of genes from fungal origin which encode polypeptides having xylanase activity and their overexpression in a selected microbial host cell. Xylanases of fungal origin generally have lower pH optima and remain stable over a broader pH range than do xylanases of bacterial origin. The present invention provides for the high level production of fungal xylanases which are may be used in a variety of industrial applications requiring xylanase activity at a low pH.