Inhibition of sweet potato glucose 6-phosphate dehydrogenase by NADPH2 and ATP |
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Authors: | Muto Shoshi; Uritani Ikuzo |
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Institution: | Laboratory of Biochemistry, Faculty of Agriculture, Nagoya University Chikusa, Nagoya 464, Japan |
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Abstract: | NADPH2 and ATP competitively inhibit sweet potato glucose 6-phosphatedehydrogenase with NADP and glucose 6-phosphate (G6P), respectively.At pH 8.0, a Lineweaver-Burk plot of the reciprocal rate againstreciprocal G6P concentration was concave downwards in the presenceand absence of ATP, whereas a double reciprocal plot followedthe Michaelis-Menten relationship at pH 7.0, irrespective ofthe presence of ATP. Many of the other metabolic intermediatestested had no effects on the enzyme reaction.
1 This paper constitutes Part 96 of the Phytopathological Chemistryof Sweet Potato with Black Rot and Injury.
2 Present address: Institute of Applied Microbiology, Universityof Tokyo Bunkyo-ku, Tokyo 113. (Received October 20, 1971; ) |
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