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논문 기본 정보

자료유형
학술저널
저자정보
Bang, Myun-Ho (Graduate School of Biotechnology & Plant Metabolism Research Center, Kyunghee University) Choi, Soo-Young (Department of Genetic Engineering, Division of Life Sciences, Hallym University) Jang, Tae-O (Graduate School of Biotechnology & Plant Metabolism Research Center, Kyunghee University) Kim, Sang-Kook (Department of Biochemistry, Kyungpook National University) Kwon, Oh-Shin (Department of Biochemistry, Kyungpook National University) Kang, Tae-Cheon (Department of Anatomy, College of Medicine, Hallym University) Won, Moo-Ho (Department of Anatomy, College of Medicine, Hallym University) Park, Jin-Seu (Department of Genetic Engineering, Division of Life Sciences, Hallym University) Baek, Nam-In (Graduate School of Biotechnology & Plant Metabolism Research Center, Kyunghee University)
저널정보
대한약학회 Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea 제25권 제5호
발행연도
2002.1
수록면
643 - 646 (4page)

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The succinic semialdehyde dehydrogenase (SSADH) inhibitory component was isolated from the EtOAc fraction of Lactuca sativa through repeated column chromatography; then, it was identified as phytol, a diterpenoid, based on the interpretation of several spectral data. Incubation of SSADH with the phytol results in a time-dependent loss of enzymatic activity, suggesting that enzyme modification is irreversible. The inactivation followed pseudo-first-order kinetics with the second-rate order constant of $6.15{\times}10^{-2}mM^{-1}min^{-1}.$ Complete protection from inactivation was afforded by the coenzyme $NAD^{+}$, whereas substrate succinic semialdehyde failed to prevent the inactivation of the enzyme; therefore, it seems likely that phytol covalently binds at or near the active site of the enzyme. It is postulated that the phytol is able to elevate the neurotransmitter GABA levels in central nervous system through its inhibitory action on one of the GABA degradative enzymes, SSADH.

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