Ulsan National Institute of Science and Technology · 生化学・遺伝学・分子生物学
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The obligatory methanotroph, Methylosinus trichosporium OB3b, was studied to optimize the batch culture conditions for the formation of particulate methane monooxygenase (pMMO) in a nitrate minimal salts medium. The important medium components investigated were copper, carbon dioxide, and nitrate. The whole-cell specific pMMO activity decreased sharply with increasing copper concentrations in the range of 10-40 microM and remained constant upon further increases of the copper concentration to 12
Methanotrophs have promising applications in bioremediation and in the production of fuel-related chemicals due to their nonspecific enzyme, methane monooxygenase (MMO). The optimal conditions for cell growth and production of the soluble from of MMO (sMMO) were determined from batch cultivations of an obligatory methanotrophs, Methylosinus trichosporium OB3b, in shake flasks and a 5-L bioreactor. It was confirmed that a copper deficiency is essential for the formation of the cytoplasmic sMNO. O
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