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-Structure paper
| タイトル | Structural basis of enhanced stalling efficiency of an engineered ribosome arrest peptide. |
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| ジャーナル・号・ページ | Nucleic Acids Res, Vol. 53, Issue 19, Year 2025 |
| 掲載日 | 2025年10月14日 |
著者 | Manoj Kumar Sriramoju / Tzu-Ping Ko / Piotr Draczkowski / Shang-Te Danny Hsu / ![]() |
| PubMed 要旨 | Ribosome stalling is a critical regulatory mechanism in protein synthesis, controlling the rate and fidelity of translation. Arrest peptides, short sequences within nascent chains, can induce ...Ribosome stalling is a critical regulatory mechanism in protein synthesis, controlling the rate and fidelity of translation. Arrest peptides, short sequences within nascent chains, can induce ribosome stalling, providing insights into the dynamics of translation and potential therapeutic targets. In this study, we investigated the molecular mechanisms of ribosome stalling induced by an engineered ribosomal arrest peptide (eRAP). We used cryo-electron microscopy and biochemical assays to characterize the interactions between eRAP, the ribosome, and accessory factors such as the trigger factor. Our results reveal intricate details of the eRAP-induced ribosome stalling, including the conformational changes in the ribosomal tunnel and the nascent chain. We also observed interactions between eRAP and specific ribosomal components, highlighting the role of key amino acids in mediating ribosome stalling. Furthermore, comparison with other stalling mechanisms, such as those induced by antibiotics or natural nascent peptides, elucidates the unique features of eRAP-induced stalling. Overall, our findings provide a comprehensive understanding of ribosome stalling by arrest peptides, shedding light on the fundamental processes of translation and offering potential avenues for therapeutic interventions targeting translation regulation. |
リンク | Nucleic Acids Res / PubMed:41099701 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.59 - 2.76 Å |
| 構造データ | EMDB-66121, PDB-9wnq: EMDB-66122, PDB-9wnr: |
| 化合物 | ![]() ChemComp-ZN: ![]() ChemComp-PRO: |
| 由来 |
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キーワード | RIBOSOME / Ribosomal nascent chain / ribosomal arrest peptide / ribosomal translation / ribosome stalling / 70S Ribosome |
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