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Appl Environ Microbiol. 1977 April; 33(4): 881-884

N-Alkane oxidation enzymes of a pseudomonad.

ABSTRACT

A nicotinamide adenine dinucleotide (NAD)-dependent n-alkane dehydrogenase and an NAD phosphate (reduced form)-dependent alkane hydroxylase have been purified from cell-free extracts of Pseudomonas sp. strain 196Aa grown anaerobically on n-alkane. The n-alkane dehydrogenase (fraction R-3), obtained as a single peak from Bio-Gel P-60, showed an overall 135-fold purification and was demonstrated by infrared spectroscopy and gas chromatography to convert n-decane to 1-decene. The alkene hydroxylase activity in the S-3 fraction, purified 167 times from diethylaminoethyl-cellulose, was shown by the same methodology to convert decene to decanol. Commercial ferredoxin has been shown to increase the alkane dehydrogenase activity. An NAD-, flavine adenine dinucleotide-, and iron-dependent alcohol dehydrogenase was demonstrated in the R-3 fraction. A mechanism for the anaerobic conversion of n-alkane to fatty acid has been proposed.

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