Abstract
Fatty alcohol is considered as a promising clean fuel alternative to fossil fuel. In this study, we developed a facile and robust multiple enzyme complex of lipase (LIP), carboxylic acid reductase (CAR) and aldehyde reductase (AHR) based on cohesin-dockerin specific interaction and E. coli-ice nucleation protein (INP) surface assembly for highly efficient conversion of triacylglycerols (TAGs) to fatty alcohols. The proximity effect, customized ratio and positional arrangement of the three enzymes were readily genetically generated. The optimized cell associated three enzyme complex gave 73% of conversion yield, and showed significantly improved stability in higher temperature, acidic/alkaline environments, polar organic solvents, high concentration of substrate, and good recyclability in successive biotransformations. The three enzyme complex provides an efficient non-natural synthetic cascade route for fatty alcohol bioproduction alternative to complex de novo biosynthesis route.
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