MESOPHILIC XYLANASES

摘要

The purpose of the present invention is to provide mesophilic xylanases which are novel components in the enzymes which constitute the xylanase system derived from Acremonium cellulolyticus. The present invention provides 1) Xylanase I, derived from the mold Acremonium cellulolyticus, capable of non-specifically hydrolyzing xylan mainly into xylose, xylobiose, xylotriose and so on, having an optimal pH at 3.5 and an optimal temperature for action at 55 DEG C as determined by saccharifying activity for soluble xylan as a substrate, and a molecular weight of 30,000 as determined by SDS-polyacrylamide gel electrophoresis, 2) Xylanase II having an optimal pH at 3.8 and an optimal temperature for action at 55 DEG C and a molecular weight of 25,500, and 3) Xylanase III having an optimal pH at 3.5 and an optimal temperature for action at 50 DEG C and a molecular weight of 33,500.