+検索条件
-Structure paper
| タイトル | Pseudouridine increases ribosome stability in a thermophilic eukaryote. |
|---|---|
| ジャーナル・号・ページ | Nucleic Acids Res, Vol. 53, Issue 22, Year 2025 |
| 掲載日 | 2025年11月26日 |
著者 | Klemens Wild / Marius Klein / Alicia Burkard / Virginie Marchand / Nikola Kellner / Antonio Paez / Stefan Pastore / Tamer Butto / Yuri Motorin / Mark Helm / Irmgard Sinning / ![]() |
| PubMed 要旨 | RNA modifications alter stability, folding space, and interaction network of RNA molecules. Ribosomal RNA (rRNA) modifications stabilize the structure of ribosomes and cluster around functionally ...RNA modifications alter stability, folding space, and interaction network of RNA molecules. Ribosomal RNA (rRNA) modifications stabilize the structure of ribosomes and cluster around functionally important sites such as the peptidyl transferase center, ribosomal subunit bridges, and the polypeptide tunnel. Here, we investigate the rRNA modifications of the thermophilic fungus Chaetomium thermophilum (ct), a model organism for eukaryotic thermophily and structural stability. Using LC-MS/MS, orthogonal second and third generation RNA-sequencing and high-resolution cryo-electron microscopy, we describe a cross-correlating method to assign and quantify all ct rRNA modifications. Overall, a doubling of rRNA modifications to 4% explains ribosomal thermostability with an extended distribution towards peripheral functional sites. The 2.4 Å structure of the idle ct60S ribosome, retaining nascent chains and including metal ions, polyamines, and water molecules, allows for a comprehensive structure-function analysis. Comparison with mesophilic ribosomes from Chaetomium globosum, yeast, and human highlights the significant increase of pseudouridines (Ψs). The number of Ψs linearly correlates with growth temperature, suggesting statistical modification. A ct-specific Ψ substitution forming a 'Ψ-turn' at the polypeptide tunnel exit close to the third constriction exemplifies mechanistic adaptations of the ribosome at elevated temperatures. |
リンク | Nucleic Acids Res / PubMed:41432034 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.38 Å |
| 構造データ | EMDB-52576, PDB-9i1w: |
| 化合物 | ![]() ChemComp-SPD: ![]() ChemComp-SPM: ![]() ChemComp-MG: ![]() ChemComp-K: ![]() ChemComp-ZN: ![]() ChemComp-HOH: |
| 由来 |
|
キーワード | RIBOSOME / 60S ribosomal subunit thermophilic eukaryote RNA modification pseudouridine |
ムービー
コントローラー
構造ビューア
万見文献について



著者
リンク







Thermochaetoides thermophila (菌類)
キーワード