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-Structure paper
| タイトル | Structural insights into dynamics of the BMV TLS aminoacylation. |
|---|---|
| ジャーナル・号・ページ | Nat Commun, Vol. 16, Issue 1, Page 1276, Year 2025 |
| 掲載日 | 2025年2月3日 |
著者 | Wen Yang / Ran Yi / Jing Yao / Yongxiang Gao / Shanshan Li / Qingguo Gong / Kaiming Zhang / ![]() |
| PubMed 要旨 | Brome Mosaic Virus (BMV) utilizes a tRNA-like structure (TLS) within its 3' untranslated region to mimic host tRNA functions, aiding aminoacylation and viral replication. This study explores the ...Brome Mosaic Virus (BMV) utilizes a tRNA-like structure (TLS) within its 3' untranslated region to mimic host tRNA functions, aiding aminoacylation and viral replication. This study explores the structural dynamics of BMV TLS interacting with tyrosyl-tRNA synthetase (TyrRS) during aminoacylation. Using cryo-EM, we capture multiple states of the TLS-TyrRS complex, including unbound TLS, pre-1a, post-1a, and catalysis states, with resolutions of 4.6 Å, 3.5 Å, 3.7 Å, and 3.85 Å, respectively. These structural comparisons indicate dynamic changes in both TLS and TyrRS. Upon binding, TLS undergoes dynamic rearrangements, particularly with helices B3 and E pivoting, mediated by the unpaired A36 residue, ensuring effective recognition by TyrRS. The dynamic changes also include a more compact arrangement in the catalytic center of TyrRS and the insertion of 3' CCA end into the enzyme's active site, facilitating two-steps aminoacylation. Enzymatic assays further demonstrated the functional importance of TLS-TyrRS interactions, with mutations in key residues significantly impacting aminoacylation efficiency. Furthermore, Electrophoretic Mobility Shift Assay (EMSA) demonstrated that BMV TLS binds elongation factors EF1α and EF2, suggesting a multifaceted strategy to exploit host translational machinery. These findings not only enhance our knowledge of virus-host interactions but also offer potential targets for antiviral drug development. |
リンク | Nat Commun / PubMed:39900568 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 3.49 - 4.6 Å |
| 構造データ | EMDB-60247, PDB-8zmh: EMDB-60248, PDB-8zmi: EMDB-60249, PDB-8zmj: EMDB-60250, PDB-8zmk: |
| 化合物 | ![]() ChemComp-ATP: |
| 由来 |
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キーワード | RNA / Brome Mosaic Virus / tRNA-like structure / aminoacylation / tyrosyl-tRNA synthetase / LIGASE/RNA / Brome osaic Virus / LIGASE-RNA complex |
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brome mosaic virus (ウイルス)
phaseolus vulgaris (インゲン)
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