A conserved glutathione binding site in poliovirus is a target for antivirals and vaccine stabilisation.

A conserved glutathione binding site in poliovirus is a target for antivirals and vaccine stabilisation.
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DOI:
10.1038/s42003-022-04252-5
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发表时间:
2022-11-25
影响因子:
5.9
通讯作者:
--
中科院分区:
生物学2区
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预防脊髓灰质炎病毒(PV)根除后复发的策略可利用非感染性重组病毒样颗粒(VLP)疫苗。尽管与灭活或减毒病毒疫苗相比具有明显的优势,但VLP的不稳定性可能损害其免疫原性。谷胱甘肽(GSH)是一种重要的细胞还原剂,是包括PV在内的肠道病毒形态发生的重要辅助因子。我们报告了GSH与PV血清型3 VLP结合的冷冻电镜结构,表明它可以增强颗粒稳定性。谷胱甘肽结合带正电荷的口袋在interprotomer接口最近显示结合谷胱甘肽在肠道病毒F3和推定的抗病毒苯磺酰胺化合物在其他肠道病毒。我们显示,使用高分辨率冷冻EM,苯磺酰胺化合物与PV血清型2 VLP的结合,通过过度稳定的蛋白体间口袋,防止病毒感染所需的衣壳重排,与抗病毒活性一致。总的来说,这些结果表明GSH或类似的紧密结合的抗病毒药物提供了稳定VLP疫苗的潜力。Cryo-EM结构揭示了谷胱甘肽(GSH)在脊髓灰质炎病毒(PV)血清型3病毒样颗粒(VLP)稳定性中的作用,表明GSH或类似的紧密结合抗病毒剂提供了稳定抗PV VLP疫苗的潜力。
Strategies to prevent the recurrence of poliovirus (PV) after eradication may utilise non-infectious, recombinant virus-like particle (VLP) vaccines. Despite clear advantages over inactivated or attenuated virus vaccines, instability of VLPs can compromise their immunogenicity. Glutathione (GSH), an important cellular reducing agent, is a crucial co-factor for the morphogenesis of enteroviruses, including PV. We report cryo-EM structures of GSH bound to PV serotype 3 VLPs showing that it can enhance particle stability. GSH binds the positively charged pocket at the interprotomer interface shown recently to bind GSH in enterovirus F3 and putative antiviral benzene sulphonamide compounds in other enteroviruses. We show, using high-resolution cryo-EM, the binding of a benzene sulphonamide compound with a PV serotype 2 VLP, consistent with antiviral activity through over-stabilizing the interprotomer pocket, preventing the capsid rearrangements necessary for viral infection. Collectively, these results suggest GSH or an analogous tight-binding antiviral offers the potential for stabilizing VLP vaccines. Cryo-EM structures reveal the role of glutathione (GSH) in poliovirus (PV) serotype 3 virus-like particle (VLP) stability, suggesting GSH or an analogous tight-binding antiviral offers potential for stabilizing VLP vaccines against PV.
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发表时间: 1986-07-01
影响因子: 4.9
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