Nicotinamide Nucleoside Amidase Activity, a Novel Deamidating Reaction in NAD Metabolism, in Aspergillus Fungi
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概要
- 論文の詳細を見る
Cell-free extracts of Aspergillus niger, A. awamori, A. usamii, A. oryzae and A. flavus showed nicotinamide nucleoside amidase activity which hydrolyzes nicotinamide ribonucleoside to form nicotinic acid ribonucleoside. This enzyme was partially purified from the cell-free extract of A. niger. The enzyme was specific towards nicotinamide ribonucleoside and the K_m value for nicotinamide ribonucleoside was calculated to be 3.6 mM. The optimal pH of the deamidation of nicotinamide ribonucleoside was 5.0 to 5.5. Nicotinamide, NMN, NAD and other nicotinamide derivatives tested were inert as substrates, indicating the unsimilarity of this enzyme to nicotinamidase and NMN deamidase. Nicotinamide nucleoside amidase activity was found in several strains other than Aspergillus fungi.
- 社団法人日本生物工学会の論文
- 1983-02-25
著者
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KUWAHARA MASAAKI
Department of Urology, Miyagi Cancer Center
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ISHIDA YUTAKA
Department of Food Science, Kagawa University
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Ishida Yutaka
Department Of Biochemistry And Food Science Faculty Of Agriculture Kagawa University
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OKATANI MASAAKI
Department of Food Science, Kagawa University
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Kuwahara Masaaki
Department Of Urology Miyagi Cancer Center
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Okatani Masaaki
Department Of Food Science Kagawa University
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Kuwahara Masaaki
Department Of Agricultural Chemistry Kyoto University
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KUWAHARA MASAAKI
Department of Food Science, Kagawa University
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