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-Structure paper
| タイトル | DMSO might impact ligand binding, capsid stability, and RNA interaction in viral preparations. |
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| ジャーナル・号・ページ | Sci Rep, Vol. 14, Issue 1, Page 30408, Year 2024 |
| 掲載日 | 2024年12月6日 |
著者 | Jiri Wald / Nikolaus Goessweiner-Mohr / Antonio Real-Hohn / Dieter Blaas / Thomas C Marlovits / ![]() |
| PubMed 要旨 | Dimethyl sulfoxide (DMSO) is a widely used solvent in drug research. However, recent studies indicate that even at low concentration DMSO might cause structural changes of proteins and RNA. The ...Dimethyl sulfoxide (DMSO) is a widely used solvent in drug research. However, recent studies indicate that even at low concentration DMSO might cause structural changes of proteins and RNA. The pyrazolopyrimidine antiviral OBR-5-340 dissolved in DMSO inhibits rhinovirus-B5 infection yet is inactive against RV-A89. This is consistent with our structural observation that OBR-5-340 is only visible at the pocket factor site in rhinovirus-B5 and not in RV-A89, where the hydrophobic pocket is collapsed. Here, we analyze the impact of DMSO in RV-A89 by high-resolution cryo-electron microscopy. Our 1.76 Å cryo-EM reconstruction of RV-A89 in plain buffer, without DMSO, reveals that the pocket-factor binding site is occupied by myristate and that the previously observed local heterogeneity at protein-RNA interfaces is absent. These findings suggest that DMSO elutes the pocket factor, leading to a collapse of the hydrophobic pocket of RV-A89. Consequently, the conformational heterogeneity observed at the RNA-protein interface in the presence of DMSO likely results from increased capsid flexibility due to the absence of the pocket factor and DMSO-induced affinity modifications. This local asymmetry may promote a directional release of the RNA genome during infection. |
リンク | Sci Rep / PubMed:39639094 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 1.76 - 1.96 Å |
| 構造データ | EMDB-50840, PDB-9fx1: EMDB-50844, PDB-9fx9: |
| 化合物 | ![]() ChemComp-DAO: ![]() ChemComp-HOH: |
| 由来 |
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キーワード | VIRUS / RV-A89 / rhinovirus |
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human rhinovirus 89 atcc vr-1199 (ライノウイルス)
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