A Peptidomimetic Ligand Targeting the Chromodomain of MPP8 Reveals HRP2’s Association with the HUSH Complex
| Autor: | Kenneth H. Pearce, Sarah E. Clinkscales, Justin M. Rectenwald, Anna M. Chiarella, Jarod Waybright, Jacqueline Norris-Drouin, Kimberly D. Barnash, Gabrielle R Budziszewski, Laura E. Herring, Robert K. McGinty, Lindsey I. James, Stephanie H. Cholensky, Nathaniel A. Hathaway |
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| Rok vydání: | 2021 |
| Předmět: |
Models
Molecular Proteomics Peptidomimetic Cell Cycle Proteins Context (language use) Computational biology Ligands Methylation Biochemistry Mass Spectrometry Article Chromatin remodeling Chromodomain Histones Structure-Activity Relationship Protein Domains Fluorescence Resonance Energy Transfer Chemoproteomics Epigenetics biology Chemistry Lysine General Medicine Phosphoproteins Ligand (biochemistry) Histone biology.protein Intercellular Signaling Peptides and Proteins Molecular Medicine Peptidomimetics Hydrophobic and Hydrophilic Interactions Protein Processing Post-Translational Protein Binding |
| Zdroj: | ACS Chem Biol |
| ISSN: | 1554-8937 1554-8929 |
| DOI: | 10.1021/acschembio.1c00429 |
| Popis: | The interpretation of histone post-translational modifications (PTMs), specifically lysine methylation, by specific classes of “reader” proteins marks an important aspect of epigenetic control of gene expression. Methyl-lysine (Kme) readers often regulate gene expression patterns through the recognition of a specific Kme PTM while participating in or recruiting large protein complexes that contain enzymatic or chromatin remodeling activity. Understanding the composition of these Kme-reader-containing protein complexes can serve to further our understanding of the biological roles of Kme readers, while small molecule chemical tools can be valuable reagents in interrogating novel protein–protein interactions. Here, we describe our efforts to target the chromodomain of M-phase phosphoprotein 8 (MPP8), a member of the human silencing hub (HUSH) complex and a histone 3 lysine 9 trimethyl (H3K9me3) reader that is vital for heterochromatin formation and has specific roles in cancer metastasis. Utilizing a one-bead, one-compound (OBOC) combinatorial screening approach, we identified UNC5246, a peptidomimetic ligand capable of interacting with the MPP8 chromodomain in the context of the HUSH complex. Additionally, a biotinylated derivative of UNC5246 facilitated chemoproteomics studies which revealed hepatoma-derived growth factor-related protein 2 (HRP2) as a novel protein associated with MPP8. HRP2 was further shown to colocalize with MPP8 at the E-cadherin gene locus, suggesting a possible role in cancer cell plasticity. |
| Databáze: | OpenAIRE |
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