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-Structure paper
| タイトル | Structural studies on ribosomes of differentially macrolide-resistant strains. |
|---|---|
| ジャーナル・号・ページ | Life Sci Alliance, Vol. 8, Issue 8, Year 2025 |
| 掲載日 | 2025年6月9日 |
著者 | André Rivalta / Aliza Fedorenko / Alexandre Le Scornet / Sophie Thompson / Yehuda Halfon / Elinor Breiner Goldstein / Sude Çavdaroglu / Tal Melenitzky / Disha-Gajanan Hiregange / Ella Zimmerman / Anat Bashan / Mee-Ngan Frances Yap / Ada Yonath / ![]() |
| PubMed 要旨 | Antimicrobial resistance is a major global health challenge, diminishing the efficacy of many antibiotics, including macrolides. In , an opportunistic pathogen, macrolide resistance is primarily ...Antimicrobial resistance is a major global health challenge, diminishing the efficacy of many antibiotics, including macrolides. In , an opportunistic pathogen, macrolide resistance is primarily mediated by Erm-family methyltransferases, which mono- or dimethylate A2058 in the 23S ribosomal RNA, reducing drug binding. Although macrolide-ribosome interactions have been characterized in nonpathogenic species, their structural basis in clinically relevant pathogens remains limited. In this study, we investigate the impact of -mediated resistance on drug binding by analyzing ribosomes from strains with varying levels of expression and activity. Using cryo-electron microscopy, we determined the high-resolution structures of solithromycin-bound ribosomes, including those with dimethylated A2058. Our structural analysis reveals the specific interactions that enable solithromycin binding despite double methylation and resistance, as corroborated by microbiological and biochemical data, suggesting that further optimization of ketolide-ribosome interactions could enhance macrolide efficacy against resistant strains. |
リンク | Life Sci Alliance / PubMed:40490363 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.07 - 2.39 Å |
| 構造データ | ![]() EMDB-52642: Consensus map of the 70S ribosome of a MLSb sensitive S. aureus strain "KES34" in complex with solithromycin ![]() EMDB-52647: Focused refinement of the large ribosomal subunit of a MLSb sensitive S. aureus strain "KES34" in complex with solithromycin ![]() EMDB-52648: Postprocessed map of the focused refinement of the small ribosomal subunit body of a MLSb sensitive S. aureus strain "KES34" ![]() EMDB-52649: Postprocessed map of the focused refinement of the small ribosomal subunit head of the MLSb sensitive S. aureus strain "KES34" EMDB-53066, PDB-9qeg: EMDB-53067, PDB-9qeh: |
| 化合物 | ![]() ChemComp-ZN: ![]() ChemComp-MG: ![]() ChemComp-EM1: ![]() ChemComp-K: ![]() ChemComp-HOH: |
| 由来 |
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キーワード | RIBOSOME / resistance / rRNA / antibiotic |
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staphylococcus aureus subsp. aureus usa300 (黄色ブドウ球菌)
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