Abstract
AbstractEnzyme‐mediated protein modification often requires large amounts of biocatalyst, adding significant costs to the process and limiting industrial applications. Herein, we demonstrate a scalable and straightforward strategy for the efficient capture and recycling of enzymes using a small‐molecule affinity tag. A proline variant of an evolved sortase A (SrtA 7M) was N‐terminally labeled with lithocholic acid (LA)—an inexpensive bile acid that exhibits strong binding to β‐cyclodextrin (βCD). Capture and recycling of the LA‐Pro‐SrtA 7M conjugate was achieved using βCD‐modified sepharose resin. The LA‐Pro‐SrtA 7M conjugate retained full enzymatic activity, even after multiple rounds of recycling.
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