A Macrocyclic Peptide That Serves As a Cocrystallization Ligand and Inhibits the Function of a MATE Family Transporter
Overview
Affiliations
The random non-standard peptide integrated discovery (RaPID) system has proven to be a powerful approach to discover de novo natural product-like macrocyclic peptides that inhibit protein functions. We have recently reported three macrocyclic peptides that bind to Pyrococcus furiosus multidrug and toxic compound extrusion (PfMATE) transporter and inhibit the transport function. Moreover, these macrocyclic peptides were successfully employed as cocrystallization ligands of selenomethionine-labeled PfMATE. In this report, we disclose the details of the RaPID selection strategy that led to the identification of these three macrocyclic peptides as well as a fourth macrocyclic peptide, MaD8, which is exclusively discussed in this article. MaD8 was found to bind within the cleft of PfMATE's extracellular side and blocked the path of organic small molecules being extruded. The results of an ethidium bromide efflux assay confirmed the efflux inhibitory activity of MaD8, whose behavior was similar to that of previously reported MaD5.
Macrocyclic peptides as a new class of targeted protein degraders.
Jing X, Mackay J, Passioura T RSC Chem Biol. 2025; 6(3):326-337.
PMID: 39822773 PMC: 11733494. DOI: 10.1039/d4cb00199k.
Sohrabi C, Foster A, Tavassoli A Nat Rev Chem. 2023; 4(2):90-101.
PMID: 37128052 DOI: 10.1038/s41570-019-0159-2.
Pascha M, Thijssen V, Egido J, Linthorst M, van Lanen J, van Dongen D ACS Chem Biol. 2022; 17(9):2425-2436.
PMID: 35926224 PMC: 9486808. DOI: 10.1021/acschembio.2c00040.
Directing evolution of novel ligands by mRNA display.
Kamalinia G, Grindel B, Takahashi T, Millward S, Roberts R Chem Soc Rev. 2021; 50(16):9055-9103.
PMID: 34165126 PMC: 8725378. DOI: 10.1039/d1cs00160d.
Expanding the Chemical Diversity of Genetically Encoded Libraries.
Iskandar S, Haberman V, Bowers A ACS Comb Sci. 2020; 22(12):712-733.
PMID: 33167616 PMC: 8284915. DOI: 10.1021/acscombsci.0c00179.