Journal: Nat Commun / Year: 2018 Title: Implication for alphavirus host-cell entry and assembly indicated by a 3.5Å resolution cryo-EM structure. Authors: Lihong Chen / Ming Wang / Dongjie Zhu / Zhenzhao Sun / Jun Ma / Jinglin Wang / Lingfei Kong / Shida Wang / Zaisi Liu / Lili Wei / Yuwen He / Jingfei Wang / Xinzheng Zhang / Abstract: Alphaviruses are enveloped RNA viruses that contain several human pathogens. Due to intrinsic heterogeneity of alphavirus particles, a high resolution structure of the virion is currently lacking. ...Alphaviruses are enveloped RNA viruses that contain several human pathogens. Due to intrinsic heterogeneity of alphavirus particles, a high resolution structure of the virion is currently lacking. Here we provide a 3.5 Å cryo-EM structure of Sindbis virus, using block based reconstruction method that overcomes the heterogeneity problem. Our structural analysis identifies a number of conserved residues that play pivotal roles in the virus life cycle. We identify a hydrophobic pocket in the subdomain D of E2 protein that is stabilized by an unknown pocket factor near the viral membrane. Residues in the pocket are conserved in different alphaviruses. The pocket strengthens the interactions of the E1/E2 heterodimer and may facilitate virus assembly. Our study provides structural insights into alphaviruses that may inform the design of drugs and vaccines.
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Oct 23, 2018
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Mar 13, 2019
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Mar 13, 2019
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Mar 13, 2019
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Mar 13, 2019
Processing site: PDBj / Status: Released
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