PsADH, an alcohol dehydrogenase originating in Pantoea sp. was characterized and found to convert a broad variety of fatty alcohols into their corresponding aldehydes, the substrates of alkane biosynthesis. By coupling PsADH with NpAD, a cyanobacterial aldehyde-deformylating oxygenase, and by optimizing the conditions of the enzyme-catalyzed reactions, we achieved a 52% conversion of 1-tetradecanol to tridecane. We further applied this system to generate alkanes ranging from C5-17. These alkanes can be used as biofuels, suggesting that introducing a suitable alcohol dehydrogenase is an effective strategy to utilize fatty alcohols for alkane production.
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