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Purification and characterization of the overexpressed Aspergillus oryzae xylanase, XynF1
N Kitamoto1, S Yoshino, K Ohmiya
1Food Research Institute, Aichi Prefectural Government, Nagoya, Japan.
Bioscience, Biotechnology, and Biochemistry
|December 10, 1999
Abstract:
The Aspergillus oryzae xynF1 gene coding for a xylanase, XynF1, was successfully overexpressed under the strong A. oryzae TEF1 gene promoter. The high-XynF1-producing transformant secreted about 180 mg/l of XynF1 in the glucose-containing medium. The overexpressed XynF1 was purified by only one chromatographic step. The purified XynF1 had a molecular mass of 35.0 kDa, a pH optimum of 5.0, and a temperature optimum of 60 degrees C.