Macrocyclic peptides that inhibit Wnt signalling via interaction with Wnt3a

Literature Information

Publication Date 2020-03-24
DOI 10.1039/D0CB00016G
Impact Factor 0
Authors

Manuel E. Otero-Ramirez, Kyoko Matoba, Emiko Mihara, Junichi Takagi, Hiroaki Suga


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Abstract

Here we report de novo macrocyclic peptide binders to Wnt3a, a member of the Wnt protein family. By means of the Random non-standard Peptides Integrated Discovery (RaPID) system, we have performed in vitro selection against the complex of mouse Wnt3a (mWnt3a) with human afamin (hAFM) to discover macrocyclic peptides that bind mWnt3a with KD values as tight as 110 nM. One of these peptides, WAp-D04 (Wnt–AFM-peptide-D04), was able to inhibit the receptor-mediated signaling process, which was demonstrated in a Wnt3a-dependent reporter cell-line. Based on this initial hit, we applied a block-mutagenesis scanning display to identify a mutant inhibitor, WAp-D04-W10P, with 5-fold greater potency in a reporter assay. This work represents the first instance of molecules capable of inhibiting Wnt signaling through direct interaction with a Wnt protein, a molecular class for which targeting has been challenging due its highly hydrophobic nature.

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RSC Chemical Biology

RSC Chemical Biology
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