Diversity of Glycerol Dehydrogenase in Methylotrophic Yeasts

概要

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Two types of glycerol dehydrogenase (GDH) were found on DEAE-cellulose column chromatography of cell-free extracts of methylotrophic yeasts. One type, designated as GDH I, showed only the reductive activity which was detected in the reaction system containing dihydroxyacetone and NADH, at pH 6.0. The other type, designated as GDH II, showed the oxidative activity which was detected in the system containing glycerol and NAD+, at pH 9.0, together with the reductive activity. Candida boidinii No. 2201, which possesses the phosphorylative pathway for glycerol dissimilation, had only GDH I when grown on glycerol or methanol as the carbon source. Hansenula ofunaensis, which has the oxidative pathway, had both GDH I and GDH II when grown on glycerol, but only GDH I when grown on methanol. Hansenula polymorpha DL-1, which has both pathways, had both GDH I and GDH II when grown on glycerol or methanol.
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