Stable repeated-batch production of recombinant dye-decolorizing peroxidase (rDyP) from Aspergillus oryzae |
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Authors: | Shakeri Mozaffar Sugano Yasushi Shoda Makoto |
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Affiliation: | aChemical Resources Laboratory, Tokyo Institute of Technology, R1-29, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan |
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Abstract: | Recombinant Aspergillus oryzae expressing a dye-decolorizing peroxidase gene (dyp) was cultivated for repeated-batch production of recombinant dye-decolorizing peroxidase (rDyP) using maltose as a carbon source. High-level rDyP activity in limitation of carbon and nitrogen sources was maintained stably for 26 cycles of repeated 1-d batches of A. oryzae pellets without any additional pH control. Cultures maintained at 4 degrees C for 20 d resumed rDyP production following a single day of incubation. One liter filtrated crude rDyP containing 4600 U rDyP decolorized 5.07 g RBBR at the apparent decolorization rate of 17.7 mg l(-1) min(-1). |
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Keywords: | dye-decolorizing peroxidase recombinant Aspergillus oryzae repeated-batch Remazol Brilliant Blue R |
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