Analysis of Zika virus capsid-Aedes aegypti mosquito interactome reveals pro-viral host factors critical for establishing infection

Rommel J. Gestuveo (), Jamie Royle, Claire L. Donald, Douglas J. Lamont, Edward C. Hutchinson, Andres Merits, Alain Kohl () and Margus Varjak ()
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Rommel J. Gestuveo: MRC-University of Glasgow Centre for Virus Research
Jamie Royle: MRC-University of Glasgow Centre for Virus Research
Claire L. Donald: MRC-University of Glasgow Centre for Virus Research
Douglas J. Lamont: University of Dundee
Edward C. Hutchinson: MRC-University of Glasgow Centre for Virus Research
Andres Merits: University of Tartu
Alain Kohl: MRC-University of Glasgow Centre for Virus Research
Margus Varjak: MRC-University of Glasgow Centre for Virus Research

Nature Communications, 2021, vol. 12, issue 1, 1-16

Abstract: Abstract The escalating global prevalence of arboviral diseases emphasizes the need to improve our understanding of their biology. Research in this area has been hindered by the lack of molecular tools for studying virus-mosquito interactions. Here, we develop an Aedes aegypti cell line which stably expresses Zika virus (ZIKV) capsid proteins in order to study virus-vector protein-protein interactions through quantitative label-free proteomics. We identify 157 interactors and show that eight have potentially pro-viral activity during ZIKV infection in mosquito cells. Notably, silencing of transitional endoplasmic reticulum protein TER94 prevents ZIKV capsid degradation and significantly reduces viral replication. Similar results are observed if the TER94 ortholog (VCP) functioning is blocked with inhibitors in human cells. In addition, we show that an E3 ubiquitin-protein ligase, UBR5, mediates the interaction between TER94 and ZIKV capsid. Our study demonstrates a pro-viral function for TER94/VCP during ZIKV infection that is conserved between human and mosquito cells.

Date: 2021
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DOI: 10.1038/s41467-021-22966-8

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