Design of a surrogate for high throughput screening of fatty aldehyde reductase engineering.

We designed and synthesized a fatty aldehyde surrogate containing a formyl thioester group, which can be reduced by fatty aldehyde reductase (FALR) with stoichiometric formaldehyde generation. It can be rapidly visualized and quantified using the Purpald assay. We demonstrated its successful application in the high throughput screening of FALR engineering.