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-Structure paper
| タイトル | New rhinovirus uncoating intermediate reveals how sodium versus potassium ions influence RNA release. |
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| ジャーナル・号・ページ | Sci Rep, Vol. 15, Issue 1, Page 36768, Year 2025 |
| 掲載日 | 2025年10月21日 |
著者 | Antonio Real-Hohn / Dieter Blaas / ![]() |
| PubMed 要旨 | Electron microscopy (EM) of rhinovirus A2 (RV-A2) incubated in Na phosphate buffer (pH 7.6) for 12 h at 25 °C revealed partial fragmentation, whereas upon incubation in K phosphate buffer, RV-A2 ...Electron microscopy (EM) of rhinovirus A2 (RV-A2) incubated in Na phosphate buffer (pH 7.6) for 12 h at 25 °C revealed partial fragmentation, whereas upon incubation in K phosphate buffer, RV-A2 appeared intact. In buffers adjusted to pH 5.8, these differences became more pronounced; acidic Na phosphate buffer promoted disintegration of the particles, whereas in acidic K phosphate buffer, the virus appeared like native. Incubation in the acidic buffers for one hour at 4 °C followed by neutralisation resulted in the respective formation of non-infectious A particles (in Na) and a non-infectious novel uncoating intermediate (in K), which we termed 'E0 particle'. Negative staining EM revealed phosphotungstate penetration into A particles, but not into E0 particles. Cryo-EM image reconstruction of the E0 particle showed clear differences between A and E0 particles; like native virus, E0 contained VP4 and a pocket factor. Native RV-A2 RNA cores, obtained by gentle proteinase-K digestion in K and Na phosphate buffer, respectively, differed in accessibility of dsRNA regions, detected by PaSTRy. Variance in RNA compactness observed in K versus Na phosphate buffer was confirmed by rotary shadowing EM; in K phosphate buffer, the RNA remained condensed while, in Na phosphate buffer, distinct unfolding stages were apparent. |
リンク | Sci Rep / PubMed:41120457 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 3.2 Å |
| 構造データ | EMDB-50930, PDB-9g0b: |
| 化合物 | ![]() ChemComp-DAO: |
| 由来 |
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キーワード | VIRUS / Uncoating Intermediate / Pocket Factor / Lauric Acid |
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rhinovirus a2 (ライノウイルス)
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