Infectious bronchitis virus generates spherules from zippered endoplasmic reticulum membranes.
Identifieur interne : 002769 ( Ncbi/Curation ); précédent : 002768; suivant : 002770Infectious bronchitis virus generates spherules from zippered endoplasmic reticulum membranes.
Auteurs : Helena J. Maier [Royaume-Uni] ; Philippa C. Hawes ; Eleanor M. Cottam ; Judith Mantell ; Paul Verkade ; Paul Monaghan ; Tom Wileman ; Paul BrittonSource :
- mBio [ 2150-7511 ] ; 2013.
Descripteurs français
- KwdFr :
- Animaux, Humains, Infections à coronavirus (médecine vétérinaire), Infections à coronavirus (virologie), Lignée cellulaire, Maladies de la volaille (virologie), Membranes intracellulaires (), Membranes intracellulaires (ultrastructure), Membranes intracellulaires (virologie), Poulets, Réplication virale, Réticulum endoplasmique (), Réticulum endoplasmique (ultrastructure), Réticulum endoplasmique (virologie), Virus de la bronchite infectieuse (génétique), Virus de la bronchite infectieuse (physiologie).
- MESH :
- génétique : Virus de la bronchite infectieuse.
- médecine vétérinaire : Infections à coronavirus.
- physiologie : Virus de la bronchite infectieuse.
- virologie : Infections à coronavirus, Maladies de la volaille, Membranes intracellulaires, Réticulum endoplasmique.
- Animaux, Humains, Lignée cellulaire, Membranes intracellulaires, Poulets, Réplication virale, Réticulum endoplasmique.
English descriptors
- KwdEn :
- Animals, Cell Line, Chickens, Coronavirus Infections (veterinary), Coronavirus Infections (virology), Endoplasmic Reticulum (chemistry), Endoplasmic Reticulum (ultrastructure), Endoplasmic Reticulum (virology), Humans, Infectious bronchitis virus (genetics), Infectious bronchitis virus (physiology), Intracellular Membranes (chemistry), Intracellular Membranes (ultrastructure), Intracellular Membranes (virology), Poultry Diseases (virology), Virus Replication.
- MESH :
- chemistry : Endoplasmic Reticulum, Intracellular Membranes.
- genetics : Infectious bronchitis virus.
- physiology : Infectious bronchitis virus.
- ultrastructure : Endoplasmic Reticulum, Intracellular Membranes.
- veterinary : Coronavirus Infections.
- virology : Coronavirus Infections, Endoplasmic Reticulum, Intracellular Membranes, Poultry Diseases.
- Animals, Cell Line, Chickens, Humans, Virus Replication.
Abstract
Replication of positive-sense RNA viruses is associated with the rearrangement of cellular membranes. Previous work on the infection of tissue culture cell lines with the betacoronaviruses mouse hepatitis virus and severe acute respiratory syndrome coronavirus (SARS-CoV) showed that they generate double-membrane vesicles (DMVs) and convoluted membranes as part of a reticular membrane network. Here we describe a detailed study of the membrane rearrangements induced by the avian gammacoronavirus infectious bronchitis virus (IBV) in a mammalian cell line but also in primary avian cells and in epithelial cells of ex vivo tracheal organ cultures. In all cell types, structures novel to IBV infection were identified that we have termed zippered endoplasmic reticulum (ER) and spherules. Zippered ER lacked luminal space, suggesting zippering of ER cisternae, while spherules appeared as uniform invaginations of zippered ER. Electron tomography showed that IBV-induced spherules are tethered to the zippered ER and that there is a channel connecting the interior of the spherule with the cytoplasm, a feature thought to be necessary for sites of RNA synthesis but not seen previously for membrane rearrangements induced by coronaviruses. We also identified DMVs in IBV-infected cells that were observed as single individual DMVs or were connected to the ER via their outer membrane but not to the zippered ER. Interestingly, IBV-induced spherules strongly resemble confirmed sites of RNA synthesis for alphaviruses, nodaviruses, and bromoviruses, which may indicate similar strategies of IBV and these diverse viruses for the assembly of RNA replication complexes.
DOI: 10.1128/mBio.00801-13
PubMed: 24149513
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pubmed:24149513Le document en format XML
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<term>Cell Line</term>
<term>Chickens</term>
<term>Coronavirus Infections (veterinary)</term>
<term>Coronavirus Infections (virology)</term>
<term>Endoplasmic Reticulum (chemistry)</term>
<term>Endoplasmic Reticulum (ultrastructure)</term>
<term>Endoplasmic Reticulum (virology)</term>
<term>Humans</term>
<term>Infectious bronchitis virus (genetics)</term>
<term>Infectious bronchitis virus (physiology)</term>
<term>Intracellular Membranes (chemistry)</term>
<term>Intracellular Membranes (ultrastructure)</term>
<term>Intracellular Membranes (virology)</term>
<term>Poultry Diseases (virology)</term>
<term>Virus Replication</term>
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<term>Humains</term>
<term>Infections à coronavirus (médecine vétérinaire)</term>
<term>Infections à coronavirus (virologie)</term>
<term>Lignée cellulaire</term>
<term>Maladies de la volaille (virologie)</term>
<term>Membranes intracellulaires ()</term>
<term>Membranes intracellulaires (ultrastructure)</term>
<term>Membranes intracellulaires (virologie)</term>
<term>Poulets</term>
<term>Réplication virale</term>
<term>Réticulum endoplasmique ()</term>
<term>Réticulum endoplasmique (ultrastructure)</term>
<term>Réticulum endoplasmique (virologie)</term>
<term>Virus de la bronchite infectieuse (génétique)</term>
<term>Virus de la bronchite infectieuse (physiologie)</term>
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<term>Intracellular Membranes</term>
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<term>Lignée cellulaire</term>
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<front><div type="abstract" xml:lang="en">Replication of positive-sense RNA viruses is associated with the rearrangement of cellular membranes. Previous work on the infection of tissue culture cell lines with the betacoronaviruses mouse hepatitis virus and severe acute respiratory syndrome coronavirus (SARS-CoV) showed that they generate double-membrane vesicles (DMVs) and convoluted membranes as part of a reticular membrane network. Here we describe a detailed study of the membrane rearrangements induced by the avian gammacoronavirus infectious bronchitis virus (IBV) in a mammalian cell line but also in primary avian cells and in epithelial cells of ex vivo tracheal organ cultures. In all cell types, structures novel to IBV infection were identified that we have termed zippered endoplasmic reticulum (ER) and spherules. Zippered ER lacked luminal space, suggesting zippering of ER cisternae, while spherules appeared as uniform invaginations of zippered ER. Electron tomography showed that IBV-induced spherules are tethered to the zippered ER and that there is a channel connecting the interior of the spherule with the cytoplasm, a feature thought to be necessary for sites of RNA synthesis but not seen previously for membrane rearrangements induced by coronaviruses. We also identified DMVs in IBV-infected cells that were observed as single individual DMVs or were connected to the ER via their outer membrane but not to the zippered ER. Interestingly, IBV-induced spherules strongly resemble confirmed sites of RNA synthesis for alphaviruses, nodaviruses, and bromoviruses, which may indicate similar strategies of IBV and these diverse viruses for the assembly of RNA replication complexes.</div>
</front>
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