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-Structure paper
タイトル | Direct visualization of ribosomes in the cell-free system revealed the functional evolution of aminoglycoside. |
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ジャーナル・号・ページ | J Biochem, Vol. 175, Issue 6, Page 587-598, Year 2024 |
掲載日 | 2024年5月31日 |
著者 | Junta Tomono / Kosuke Asano / Takuma Chiashi / Masato Suzuki / Masayuki Igarashi / Yoshiaki Takahashi / Yoshikazu Tanaka / Takeshi Yokoyama / |
PubMed 要旨 | The rapid emergence of multi-drug-resistant bacteria has raised a serious public health concern. Therefore, new antibiotic developments have been highly desired. Here, we propose a new method to ...The rapid emergence of multi-drug-resistant bacteria has raised a serious public health concern. Therefore, new antibiotic developments have been highly desired. Here, we propose a new method to visualize antibiotic actions on translating ribosomes in the cell-free system under macromolecular crowding conditions by cryo-electron microscopy, designated as the DARC method: the Direct visualization of Antibiotic binding on Ribosomes in the Cell-free translation system. This new method allows for acquiring a more comprehensive understanding of the mode of action of antibiotics on the translation inhibition without ribosome purification. Furthermore, with the direct link to biochemical analysis at the same condition as cryo-EM observation, we revealed the evolution of 2-DOS aminoglycosides from dibekacin (DBK) to arbekacin (ABK) by acquiring the synthetic tailored anchoring motif to lead to stronger binding affinity to ribosomes. Our cryo-EM structures of DBK and ABK bound ribosomes in the cell-free environment clearly depicted a synthetic tailored γ-amino-α-hydroxybutyryl (HABA) motif formed additional interactions with the ribosome enhancing antibiotic bindings. This new approach would be valuable for understanding the function of antibiotics for more efficient drug development. |
リンク | J Biochem / PubMed:38227611 |
手法 | EM (単粒子) |
解像度 | 2.43 - 2.9 Å |
構造データ | EMDB-35411, PDB-8ifb: EMDB-35412, PDB-8ifc: EMDB-35413, PDB-8ifd: EMDB-35414, PDB-8ife: |
化合物 | ChemComp-MG: ChemComp-SPD: ChemComp-84D: ChemComp-SPM: ChemComp-ZN: ChemComp-84G: |
由来 |
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キーワード | RIBOSOME |