Purification and Characterization of an NADH-Dependent Alcohol Dehydrogenase from<i>Candida maris</i>for the Synthesis of Optically Active 1-(Pyridyl)ethanol Derivatives
作者:Shigeru KAWANO、Miho YANO、Junzo HASEGAWA、Yoshihiko YASOHARA
DOI:10.1271/bbb.100528
日期:2011.6.23
A novel (R)-specific alcohol dehydrogenase (AFPDH) produced by Candida maris IFO10003 was purified to homogeneity by ammonium sulfate fractionation, DEAE-Toyopearl, and Phenyl-Toyopearl, and characterized. The relative molecular mass of the native enzyme was found to be 59,900 by gel filtration, and that of the subunit was estimated to be 28,900 on SDS-polyacrylamide gel electrophoresis. These results suggest that the enzyme is a homodimer. It required NADH as a cofactor and reduced various kinds of carbonyl compounds, including ketones and aldehydes. AFPDH reduced acetylpyridine derivatives, β-keto esters, and some ketone compounds with high enantioselectivity. This is the first report of an NADH-dependent, highly enantioselective (R)-specific alcohol dehydrogenase isolated from a yeast. AFPDH is a very useful enzyme for the preparation of various kinds of chiral alcohols.
一种由Candida maris IFO10003产生的新型(R)-特异性醇脱氢酶(AFPDH)通过硫酸铵分级、DEAE-Toyopearl和Phenyl-Toyopearl纯化至均一,并进行了表征。通过凝胶过滤法测得该酶的原分子质量为59,900,而在SDS-聚丙烯酰胺凝胶电泳中亚基的估计分子质量为28,900。这些结果表明该酶为同源二聚体。它需要NADH作为辅因子,并能还原包括酮和醛在内的多种羰基化合物。AFPDH能高对映选择性地还原乙酰吡啶衍生物、β-酮酯和某些酮化合物。这是首例从酵母中分离出的依赖NADH的高对映选择性(R)-特异性醇脱氢酶的报道。AFPDH对于制备多种手性醇是非常有用的酶。