Stapled Peptide Inhibitors of Autophagy Adapter LC3B.
Stapled Peptide Inhibitors of Autophagy Adapter LC3B.
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DOI:
10.1002/cbic.202000212
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发表时间:
2020-10-01
期刊:
影响因子:
--
通讯作者:
Kritzer JA
中科院分区:
文献类型:
--
作者:
Cerulli RA;Shehaj L;Brown H;Pace J;Mei Y;Kritzer JA
A growing body of evidence suggests that autophagy inhibition enhances the effectiveness of chemotherapy, especially in difficult-to-treat cancers. Existing autophagy inhibitors are primarily lysosomotropic agents. More specific autophagy inhibitors have not yet been developed. The microtubule-associated protein 1A/1B light chain 3B protein, LC3B, is an adapter protein that mediates key protein-protein interactions at several points in autophagy pathways. In this work, we use a known peptide ligand as a starting point to develop improved LC3B inhibitors. We obtained structure-activity relationships that quantify the binding contributions of peptide termini, individual charged residues, and hydrophobic interactions. Based on these data, we used artificial amino acids and diversity-oriented stapling to improve affinity and resistance to biological degradation while maintaining or improving LC3B affinity and selectivity. These peptides represent the highest-affinity LC3B-selective ligands reported to date, and they will be useful tools for further elucidation of LC3B’s role in autophagy and in cancer.
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