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Microbial Production of Methyl Ketones.

Authors :
Patel, Ramesh N.
Hou, Ching T.
Laskin, Allen I.
Derelanko, Patricia
Felix, Andre
Source :
European Journal of Biochemistry. 11/15/79, Vol. 101 Issue 2, p401-406. 6p.
Publication Year :
1979

Abstract

Cell-free extracts derived from yeasts Candida utilis ATCC 26387, Hansenula polymorpha ATCC 26012, Pichia sp. NRRL-Y-11328 Torulopsis sp. strain A1 and Kloeckera sp. strain A2 catalyzed an NAD+-dependent oxidation of secondary alcohols (2-propanol, 2-butanol, 2-pentanol, 2-hexanol) to the corresponding methyl ketones (acetone, 2-butanone, 2-pentanone, 2-hexanone). We have purified a NAD+-specific secondary alcohol dehydrogenase from methanol-grown yeast, Pichia sp. The purified enzyme is homogenous as judged by polyacrylamide gel electrophoresis. The purified enzyme catalyzed the oxidation of secondary alcohols to the corresponding methyl ketones in the presence of NAD+ as an electron acceptor. Primary alcohols were not oxidized by the purified enzyme. The optimum pH for oxidation of secondary alcohols by the purified enzyme is 8.0. The molecular weight of the purified enzyme as determined by gel filtration is 98000 and subunit size as determined by sodium dodecyl sulfate gel electrophoresis is 48000. The activity of the purified secondary alcohol dehydrogenase was inhibited by sulfhydryl inhibitors and metal-binding agents. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00142956
Volume :
101
Issue :
2
Database :
Academic Search Index
Journal :
European Journal of Biochemistry
Publication Type :
Academic Journal
Accession number :
13697060
Full Text :
https://doi.org/10.1111/j.1432-1033.1979.tb19732.x