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A gene-encoded aldehyde tag repurposed from RiPP cyclophane-forming pathway
Suze Ma1, Heng Chen2, Shuxun Liu1
1Department of Chemistry, Fudan University, Shanghai 200433, China.
Abstract:
Gene-encoded aldehyde tag technology has been widely utilized in protein bioorthogonal chemistry and biotechnological application. Herein, we report utilization of the promiscuous rSAM cyclophane synthase SjiB involved in triceptide biosynthesis as a dedicated and highly efficient formylglycine synthase. The new aldehyde tag sequence in this system, YQSSI, is biosynthetically orthogonal to the known aldehyde tag (C/S)x(P/A)xR. The potential use of SjiB/YQSSI aldehyde tag system was further validated in fluorescent labelling of model proteins.
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