The AP-1 adaptor complex is essential for intracellular trafficking of the ORF2 capsid protein and assembly of Hepatitis E virus.

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State: Public
Version: Final published version
License: CC BY-NC-ND 4.0
Serval ID
serval:BIB_39808203A410
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
The AP-1 adaptor complex is essential for intracellular trafficking of the ORF2 capsid protein and assembly of Hepatitis E virus.
Journal
Cellular and molecular life sciences
Author(s)
Ferrié M., Alexandre V., Montpellier C., Bouquet P., Tubiana T., Mézière L., Ankavay M., Bentaleb C., Dubuisson J., Bressanelli S., Aliouat-Denis C.M., Rouillé Y., Cocquerel L.
ISSN
1420-9071 (Electronic)
ISSN-L
1420-682X
Publication state
Published
Issued date
09/08/2024
Peer-reviewed
Oui
Volume
81
Number
1
Pages
335
Language
english
Notes
Publication types: Journal Article
Publication Status: epublish
Abstract
Although the Hepatitis E virus (HEV) is an emerging global health burden, little is known about its interaction with the host cell. HEV genome encodes three proteins including the ORF2 capsid protein that is produced in different forms, the ORF2i protein which is the structural component of viral particles, and the ORF2g/c proteins which are massively secreted but are not associated with infectious material. We recently demonstrated that the endocytic recycling compartment (ERC) is hijacked by HEV to serve as a viral factory. However, host determinants involved in the subcellular shuttling of viral proteins to viral factories are unknown. Here, we demonstrate that the AP-1 adaptor complex plays a pivotal role in the targeting of ORF2i protein to viral factories. This complex belongs to the family of adaptor proteins that are involved in vesicular transport between the trans-Golgi network and early/recycling endosomes. An interplay between the AP-1 complex and viral protein(s) has been described for several viral lifecycles. In the present study, we demonstrated that the ORF2i protein colocalizes and interacts with the AP-1 adaptor complex in HEV-producing or infected cells. We showed that silencing or drug-inhibition of the AP-1 complex prevents ORF2i protein localization in viral factories and reduces viral production in hepatocytes. Modeling of the ORF2i/AP-1 complex also revealed that the S domain of ORF2i likely interacts with the σ1 subunit of AP-1 complex. Hence, our study identified for the first time a host factor involved in addressing HEV proteins (i.e. ORF2i protein) to viral factories.
Keywords
Hepatitis E virus/metabolism, Hepatitis E virus/physiology, Hepatitis E virus/genetics, Humans, Adaptor Protein Complex 1/metabolism, Adaptor Protein Complex 1/genetics, Capsid Proteins/metabolism, Capsid Proteins/genetics, Protein Transport, Viral Proteins/metabolism, Viral Proteins/genetics, Virus Assembly, Hepatitis E/metabolism, Hepatitis E/virology, A5 membrane traffic inhibitor, AlphaFold2, P1H1 antibody, P3H2 antibody, PLC3 cells, Primary human hepatocytes, Proximity ligation assay, Replication
Pubmed
Web of science
Open Access
Yes
Create date
19/08/2024 7:47
Last modification date
20/08/2024 6:27
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