Oliver, M. R. , Toon, K. , Lewis, C. B., Devlin, S., Gifford, R. J. and Grove, J. (2023) Structures of the Hepaci-, Pegi-, and Pestiviruses envelope proteins suggest a novel membrane fusion mechanism. PLoS Biology, 21(7), e3002174. (doi: 10.1371/journal.pbio.3002174) (PMID:37432947) (PMCID:PMC10335668)
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Abstract
Enveloped viruses encode specialised glycoproteins that mediate fusion of viral and host membranes. Discovery and understanding of the molecular mechanisms of fusion have been achieved through structural analyses of glycoproteins from many different viruses, and yet the fusion mechanisms of some viral genera remain unknown. We have employed systematic genome annotation and AlphaFold modelling to predict the structures of the E1E2 glycoproteins from 60 viral species in the Hepacivirus, Pegivirus, and Pestivirus genera. While the predicted structure of E2 varied widely, E1 exhibited a very consistent fold across genera, despite little or no similarity at the sequence level. Critically, the structure of E1 is unlike any other known viral glycoprotein. This suggests that the Hepaci-, Pegi-, and Pestiviruses may possess a common and novel membrane fusion mechanism. Comparison of E1E2 models from various species reveals recurrent features that are likely to be mechanistically important and sheds light on the evolution of membrane fusion in these viral genera. These findings provide new fundamental understanding of viral membrane fusion and are relevant to structure-guided vaccinology.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Grove, Dr Joe and Oliver, Mr Michael and Gifford, Dr Robert and Lewis, Miss Charlotte and Toon, Dr Kamilla and Devlin, Stephen |
| Creator Roles: | Oliver, M. R.Data curation, Formal analysis, Investigation Toon, K.Investigation, Methodology Lewis, C. B.Investigation Devlin, S.Investigation Gifford, R. J.Data curation, Investigation, Methodology Grove, J.Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Supervision, Visualization, Writing – original draft |
| Authors: | Oliver, M. R., Toon, K., Lewis, C. B., Devlin, S., Gifford, R. J., and Grove, J. |
| College/School: | College of Medical Veterinary and Life Sciences > School of Infection & Immunity > Centre for Virus Research |
| Journal Name: | PLoS Biology |
| Publisher: | Public Library of Science |
| ISSN: | 1544-9173 |
| ISSN (Online): | 1545-7885 |
| Published Online: | 11 July 2023 |
| Copyright Holders: | Copyright © 2023 Oliver et al. |
| First Published: | First published in PLoS Biology 21(7): e3002174 |
| Publisher Policy: | Reproduced under a Creative Commons License |
| Data DOI: | 10.5281/zenodo.7221315 |
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