作者: Goeran Maardh , Bert L. Vallee
DOI: 10.1021/BI00371A005
关键词:
摘要: The class I human liver alcohol dehydrogenases (ADHs) catalyze the interconversion of intermediary alcohols and aldehydes dopamine metabolism in vitro, whereas those II III do not. individual, homogeneous isozymes oxidize (3,4-dihydroxyphenyl)ethanol (4-hydroxy-3-methoxyphenyl)ethanol (HMPE) ethanol with kcat/Km values range from 16 to 240 mM-1 min-1 66 min-1, respectively. They reduce corresponding (3,4-dihydroxyphenyl)acetaldehyde (4-hydroxy-3-methoxyphenyl)acetaldehyde (HMPAL) varying 7800 190,000 considerably more efficient than reduction acetaldehyde 780 4900 min-1. For beta 1 gamma 2 ADH, competes HMPE oxidation a Ki 23 microM. In addition, 1,10-phenanthroline inhibits HMPAL 20 microM 12 microM, respectively, both quite similar that for ethanol, = 22 Thus, ethanol/acetaldehyde intermediates compete same site basis ethanol-induced vivo alterations metabolism.