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. 1978 Apr;134(1):177–183. doi: 10.1128/jb.134.1.177-183.1978

Purification and characterization of a secondary alcohol dehydrogenase from a pseudomonad.

W G Niehaus Jr, T Frielle, E A Kingsley Jr
PMCID: PMC222232  PMID: 25883

Abstract

Growth of Pseudomonas sp. NRRL B3266 in the presence of oleic acid resulted in the induction of two enzymes: oleate hydratase, which produced 10(R)hydroxyoctadecanoate, and hydroxyoctadecanoate dehydrogenase, which catalyzed the oxidized nicotinamide adenine dinucleotide-dependent production of 10-oxooctadecanoate. This latter enzyme was purified to homogeneity and shown to consist of two polypeptide chains of about 29,000 daltons each. The enzyme had a broad substrate specificity, catalyzing the dehydrogenation of a number of 18-carbon hydroxy fatty acids. The kinetic parameters for various 10- and 12-hydroxy fatty acids were similar (Km ca. 5 micron and Vmax ca. 50 to 200 mumol/min per mg of protein). The enzyme also catalyzed the dehydrogenation of unsubstituted secondary alcohols. The effectiveness of these alcohols as substrates was highly dependent on their hydrophobicity, the Km decreasing from 9 mM for 4-heptanol to 7 micron for 6-dodecanol. Inhibition of the enzyme by primary alcohols also showed a dependence on hydrophobicity, the Ki decreasing from 350 mM for methanol to 90 micron for decanol.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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