The ubiquitin-proteasome system plays an important role during various stages of the coronavirus infection cycle.
Identifieur interne : 002416 ( Main/Exploration ); précédent : 002415; suivant : 002417The ubiquitin-proteasome system plays an important role during various stages of the coronavirus infection cycle.
Auteurs : Matthijs Raaben [Pays-Bas] ; Clara C. Posthuma ; Monique H. Verheije ; Eddie G. Te Lintelo ; Marjolein Kikkert ; Jan W. Drijfhout ; Eric J. Snijder ; Peter J M. Rottier ; Cornelis A M. De HaanSource :
- Journal of virology [ 1098-5514 ] ; 2010.
Descripteurs français
- KwdFr :
- Acides boroniques (pharmacologie), Animaux, Bortézomib, Chats, Coronavirus félin (pathogénicité), Infections à coronavirus (virologie), Inhibiteurs de protéases (pharmacologie), Inhibiteurs du protéasome, Leupeptines (pharmacologie), Libération de particules virales, Lignée cellulaire, Oligopeptides (pharmacologie), Proteasome endopeptidase complex (métabolisme), Pyrazines (pharmacologie), Pénétration virale, Réplication virale, Souris, Ubiquitine (métabolisme), Virus de l'hépatite murine (pathogénicité), Virus du SRAS (pathogénicité).
- MESH :
- métabolisme : Proteasome endopeptidase complex, Ubiquitine.
- pathogénicité : Coronavirus félin, Virus de l'hépatite murine, Virus du SRAS.
- pharmacologie : Acides boroniques, Inhibiteurs de protéases, Leupeptines, Oligopeptides, Pyrazines.
- virologie : Infections à coronavirus.
- Animaux, Bortézomib, Chats, Inhibiteurs du protéasome, Libération de particules virales, Lignée cellulaire, Pénétration virale, Réplication virale, Souris.
English descriptors
- KwdEn :
- Animals, Boronic Acids (pharmacology), Bortezomib, Cats, Cell Line, Chlorocebus aethiops, Coronavirus Infections (virology), Coronavirus, Feline (pathogenicity), Leupeptins (pharmacology), Mice, Murine hepatitis virus (pathogenicity), Oligopeptides (pharmacology), Protease Inhibitors (pharmacology), Proteasome Endopeptidase Complex (metabolism), Proteasome Inhibitors, Pyrazines (pharmacology), SARS Virus (pathogenicity), Ubiquitin (metabolism), Virus Internalization, Virus Release, Virus Replication.
- MESH :
- chemical , metabolism : Proteasome Endopeptidase Complex, Ubiquitin.
- chemical , pharmacology : Boronic Acids, Leupeptins, Oligopeptides, Protease Inhibitors, Pyrazines.
- pathogenicity : Coronavirus, Feline, Murine hepatitis virus, SARS Virus.
- virology : Coronavirus Infections.
- Animals, Bortezomib, Cats, Cell Line, Chlorocebus aethiops, Mice, Proteasome Inhibitors, Virus Internalization, Virus Release, Virus Replication.
Abstract
The ubiquitin-proteasome system (UPS) is a key player in regulating the intracellular sorting and degradation of proteins. In this study we investigated the role of the UPS in different steps of the coronavirus (CoV) infection cycle. Inhibition of the proteasome by different chemical compounds (i.e., MG132, epoxomicin, and Velcade) appeared to not only impair entry but also RNA synthesis and subsequent protein expression of different CoVs (i.e., mouse hepatitis virus [MHV], feline infectious peritonitis virus, and severe acute respiratory syndrome CoV). MHV assembly and release were, however, not appreciably affected by these compounds. The inhibitory effect on CoV protein expression did not appear to result from a general inhibition of translation due to induction of a cellular stress response by the inhibitors. Stress-induced phosphorylation of eukaryotic translation initiation factor 2alpha (eIF2alpha) generally results in impaired initiation of protein synthesis, but the sensitivity of MHV infection to proteasome inhibitors was unchanged in cells lacking a phosphorylatable eIF2alpha. MHV infection was affected not only by inhibition of the proteasome but also by interfering with protein ubiquitination. Viral protein expression was reduced in cells expressing a temperature-sensitive ubiquitin-activating enzyme E1 at the restrictive temperature, as well as in cells in which ubiquitin was depleted by using small interfering RNAs. Under these conditions, the susceptibility of the cells to virus infection was, however, not affected, excluding an important role of ubiquitination in virus entry. Our observations reveal an important role of the UPS in multiple steps of the CoV infection cycle and identify the UPS as a potential drug target to modulate the impact of CoV infection.
DOI: 10.1128/JVI.00485-10
PubMed: 20484504
Affiliations:
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Posthuma</name></author><author><name sortKey="Verheije, Monique H" sort="Verheije, Monique H" uniqKey="Verheije M" first="Monique H" last="Verheije">Monique H. Verheije</name></author><author><name sortKey="Te Lintelo, Eddie G" sort="Te Lintelo, Eddie G" uniqKey="Te Lintelo E" first="Eddie G" last="Te Lintelo">Eddie G. Te Lintelo</name></author><author><name sortKey="Kikkert, Marjolein" sort="Kikkert, Marjolein" uniqKey="Kikkert M" first="Marjolein" last="Kikkert">Marjolein Kikkert</name></author><author><name sortKey="Drijfhout, Jan W" sort="Drijfhout, Jan W" uniqKey="Drijfhout J" first="Jan W" last="Drijfhout">Jan W. Drijfhout</name></author><author><name sortKey="Snijder, Eric J" sort="Snijder, Eric J" uniqKey="Snijder E" first="Eric J" last="Snijder">Eric J. Snijder</name></author><author><name sortKey="Rottier, Peter J M" sort="Rottier, Peter J M" uniqKey="Rottier P" first="Peter J M" last="Rottier">Peter J M. Rottier</name></author><author><name sortKey="De Haan, Cornelis A M" sort="De Haan, Cornelis A M" uniqKey="De Haan C" first="Cornelis A M" last="De Haan">Cornelis A M. 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In this study we investigated the role of the UPS in different steps of the coronavirus (CoV) infection cycle. Inhibition of the proteasome by different chemical compounds (i.e., MG132, epoxomicin, and Velcade) appeared to not only impair entry but also RNA synthesis and subsequent protein expression of different CoVs (i.e., mouse hepatitis virus [MHV], feline infectious peritonitis virus, and severe acute respiratory syndrome CoV). MHV assembly and release were, however, not appreciably affected by these compounds. The inhibitory effect on CoV protein expression did not appear to result from a general inhibition of translation due to induction of a cellular stress response by the inhibitors. Stress-induced phosphorylation of eukaryotic translation initiation factor 2alpha (eIF2alpha) generally results in impaired initiation of protein synthesis, but the sensitivity of MHV infection to proteasome inhibitors was unchanged in cells lacking a phosphorylatable eIF2alpha. MHV infection was affected not only by inhibition of the proteasome but also by interfering with protein ubiquitination. Viral protein expression was reduced in cells expressing a temperature-sensitive ubiquitin-activating enzyme E1 at the restrictive temperature, as well as in cells in which ubiquitin was depleted by using small interfering RNAs. Under these conditions, the susceptibility of the cells to virus infection was, however, not affected, excluding an important role of ubiquitination in virus entry. Our observations reveal an important role of the UPS in multiple steps of the CoV infection cycle and identify the UPS as a potential drug target to modulate the impact of CoV infection.</div></front></TEI><affiliations><list><country><li>Pays-Bas</li></country><region><li>Utrecht (province)</li></region><settlement><li>Utrecht</li></settlement><orgName><li>Université d'Utrecht</li></orgName></list><tree><noCountry><name sortKey="De Haan, Cornelis A M" sort="De Haan, Cornelis A M" uniqKey="De Haan C" first="Cornelis A M" last="De Haan">Cornelis A M. De Haan</name><name sortKey="Drijfhout, Jan W" sort="Drijfhout, Jan W" uniqKey="Drijfhout J" first="Jan W" last="Drijfhout">Jan W. Drijfhout</name><name sortKey="Kikkert, Marjolein" sort="Kikkert, Marjolein" uniqKey="Kikkert M" first="Marjolein" last="Kikkert">Marjolein Kikkert</name><name sortKey="Posthuma, Clara C" sort="Posthuma, Clara C" uniqKey="Posthuma C" first="Clara C" last="Posthuma">Clara C. Posthuma</name><name sortKey="Rottier, Peter J M" sort="Rottier, Peter J M" uniqKey="Rottier P" first="Peter J M" last="Rottier">Peter J M. Rottier</name><name sortKey="Snijder, Eric J" sort="Snijder, Eric J" uniqKey="Snijder E" first="Eric J" last="Snijder">Eric J. Snijder</name><name sortKey="Te Lintelo, Eddie G" sort="Te Lintelo, Eddie G" uniqKey="Te Lintelo E" first="Eddie G" last="Te Lintelo">Eddie G. Te Lintelo</name><name sortKey="Verheije, Monique H" sort="Verheije, Monique H" uniqKey="Verheije M" first="Monique H" last="Verheije">Monique H. Verheije</name></noCountry><country name="Pays-Bas"><region name="Utrecht (province)"><name sortKey="Raaben, Matthijs" sort="Raaben, Matthijs" uniqKey="Raaben M" first="Matthijs" last="Raaben">Matthijs Raaben</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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