| Project/Area Number |
05671830
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Biological pharmacy
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| Research Institution | KYUSHU UNIVERSITY |
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Principal Investigator |
MORIMOTO Satoshi Kyusyu University, Faculty of pharmaceutical Sciences Associate Professor, 薬学部, 助教授 (60191045)
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| Co-Investigator(Kenkyū-buntansha) |
SHOYAMA Yukihiro Kyusyu University, Faculty of pharmaceutical Sciences Professor, 薬学部, 教授 (70037604)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1994: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1993: ¥1,500,000 (Direct Cost: ¥1,500,000)
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| Keywords | Cannabis sativa / Cannabinoid / Tetrahydrocannabinolic acid / Tetrahydrocannabinolic acid synthase / テトラハイドロカンナビノリックアシド / 生合成 / Cannabis |
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| Research Abstract |
The occurrence of DELTA^1-tetrahydrocannabinolic acid synthase was confirmed in the fresh leaf buds of marihuana (Cannabis sativa L.). The enzyme, assayd with cannabigerolic acid, was purified approximately 300-fold by chromatography on diethylaminoethyl-cellulose, phenyl Sepharose CL-4B and hydroxylapatite. The purified protein migrated during sodium dodecylsulfate-polyacrylamide gel electrophoresis (SDS-PAGE) as a single band with a molecular mass of 75kD.The native molecular mass determined by gel-filtration chromatography was 74 kDa, indicating that DELTA^1-tetrahydrocannabinolic acid synthase is a monomeric enzyme. Using isoelectric focusing, we determined a pI of 6.4 for the enzyme. The enzyme activity was greatest between pH5.5 and 6.0. The enzyme catalyzed the conversion of cannabigerolic acid or cannabinerolic acid to DELTA^1-tetrahydrocannabinolic acid. The V_<max> values were 2.68 and 0.37 nkat/mg for cannabigerolic acid and cannabinerolic acid, respectively. These results indicated that DELTA^1-tetrahydrocannabinolic acid is predominantly formed from cannabigerolic acid.
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