Covalent labeling of a chromatin reader domain using proximity-reactive cyclic peptides.

ABSTRACT: Chemical probes for chromatin reader proteins are valuable tools for investigating epigenetic regulatory mechanisms and evaluating whether the target of interest holds therapeutic potential. Developing potent inhibitors for the plant homeodomain (PHD) family of methylation readers remains a difficult task due to the charged, shallow and extended nature of the histone binding site that precludes effective engagement of conventional small molecules. Herein, we describe the development of novel proximity-reactive cyclopeptide inhibitors for PHD3-a trimethyllysine reader domain of histone demethylase KDM5A. Guided by the PHD3-histone co-crystal structure, we designed a sidechain-to-sidechain linking strategy to improve peptide proteolytic stability whilst maintaining binding affinity. We have

SUBMITTER: Zhang MY 

PROVIDER: S-EPMC9172573 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature