Proteolytic processing, deubiquitinase and interferon antagonist activities of Middle East respiratory syndrome coronavirus papain-like protease.
Identifieur interne : 001B14 ( Main/Exploration ); précédent : 001B13; suivant : 001B15Proteolytic processing, deubiquitinase and interferon antagonist activities of Middle East respiratory syndrome coronavirus papain-like protease.
Auteurs : Xingxing Yang [République populaire de Chine] ; Xiaojuan Chen [République populaire de Chine] ; Guangxing Bian [République populaire de Chine] ; Jian Tu [Australie] ; Yaling Xing [République populaire de Chine] ; Yayun Wang [République populaire de Chine] ; Zhongbin Chen [République populaire de Chine]Source :
- The Journal of general virology [ 1465-2099 ] ; 2014.
Descripteurs français
- KwdFr :
- Alignement de séquences, Coronaviridae (), Coronaviridae (enzymologie), Coronaviridae (génétique), Domaine catalytique, Données de séquences moléculaires, Facteur-3 de régulation d'interféron (métabolisme), Humains, Infections à Coronaviridae (métabolisme), Infections à Coronaviridae (virologie), Interféron bêta (antagonistes et inhibiteurs), Interféron bêta (métabolisme), Maturation post-traductionnelle des protéines, Papaïne (), Papaïne (génétique), Papaïne (métabolisme), Phosphorylation, Polyprotéines (génétique), Polyprotéines (métabolisme), Protéines virales (), Protéines virales (génétique), Protéines virales (métabolisme), Protéolyse, Séquence d'acides aminés, Ubiquitin-specific proteases (), Ubiquitin-specific proteases (génétique), Ubiquitin-specific proteases (métabolisme), Ubiquitine.
- MESH :
- antagonistes et inhibiteurs : Interféron bêta.
- enzymologie : Coronaviridae.
- génétique : Coronaviridae, Papaïne, Polyprotéines, Protéines virales, Ubiquitin-specific proteases.
- métabolisme : Facteur-3 de régulation d'interféron, Infections à Coronaviridae, Interféron bêta, Papaïne, Polyprotéines, Protéines virales, Ubiquitin-specific proteases.
- virologie : Infections à Coronaviridae.
- Alignement de séquences, Coronaviridae, Domaine catalytique, Données de séquences moléculaires, Humains, Maturation post-traductionnelle des protéines, Papaïne, Phosphorylation, Protéines virales, Protéolyse, Séquence d'acides aminés, Ubiquitin-specific proteases, Ubiquitine.
English descriptors
- KwdEn :
- Amino Acid Sequence, Catalytic Domain, Coronaviridae (chemistry), Coronaviridae (enzymology), Coronaviridae (genetics), Coronaviridae Infections (metabolism), Coronaviridae Infections (virology), Humans, Interferon Regulatory Factor-3 (metabolism), Interferon-beta (antagonists & inhibitors), Interferon-beta (metabolism), Molecular Sequence Data, Papain (chemistry), Papain (genetics), Papain (metabolism), Phosphorylation, Polyproteins (genetics), Polyproteins (metabolism), Protein Processing, Post-Translational, Proteolysis, Sequence Alignment, Ubiquitin, Ubiquitin-Specific Proteases (chemistry), Ubiquitin-Specific Proteases (genetics), Ubiquitin-Specific Proteases (metabolism), Viral Proteins (chemistry), Viral Proteins (genetics), Viral Proteins (metabolism).
- MESH :
- chemical , antagonists & inhibitors : Interferon-beta.
- chemical , chemistry : Papain, Ubiquitin-Specific Proteases, Viral Proteins.
- chemical , genetics : Papain, Polyproteins, Ubiquitin-Specific Proteases, Viral Proteins.
- chemical , metabolism : Interferon Regulatory Factor-3, Interferon-beta, Papain, Polyproteins, Ubiquitin-Specific Proteases, Viral Proteins.
- chemistry : Coronaviridae.
- enzymology : Coronaviridae.
- genetics : Coronaviridae.
- metabolism : Coronaviridae Infections.
- virology : Coronaviridae Infections.
- Amino Acid Sequence, Catalytic Domain, Humans, Molecular Sequence Data, Phosphorylation, Protein Processing, Post-Translational, Proteolysis, Sequence Alignment, Ubiquitin.
Abstract
The emerging Middle East respiratory syndrome coronavirus (MERS-CoV) causes severe pulmonary disease in humans and represents the second example of a highly pathogenic coronavirus (CoV) following severe acute respiratory syndrome coronavirus (SARS-CoV). Genomic studies revealed that two viral proteases, papain-like protease (PLpro) and 3C-like protease (3CLpro), process the polyproteins encoded by the MERS-CoV genomic RNA. We previously reported that SARS-CoV PLpro acts as both deubiquitinase (DUB) and IFN antagonist, but the function of the MERS-CoV PLpro was poorly understood. In this study, we characterized MERS-CoV PLpro, which is a protease and can recognize and process the cleavage sites (CS) of nsp1-2, nsp2-3 and nsp3-4. The LXGG consensus cleavage sites in the N terminus of pp1a/1ab, which is generally essential for CoV PLpro-mediated processing, were also characterized in MERS-CoV. MERS-CoV PLpro, like human SARS-CoV PLpro and NL63-CoV PLP2, is a viral deubiquitinating enzyme. It acts on both K48- and K63-linked ubiquitination and ISG15-linked ISGylation. We confirmed that MERS-CoV PLpro acts as an IFN antagonist through blocking the phosphorylation and nuclear translocation of IFN regulatory factor 3 (IRF3). These findings indicate that MERS-CoV PLpro acts as a viral DUB and suppresses production of IFN-β by an interfering IRF3-mediated signalling pathway, in addition to recognizing and processing the CS at the N terminus of replicase polyprotein to release the non-structural proteins. The characterization of proteolytic processing, DUB and IFN antagonist activities of MERS-CoV PLpro would reveal the interactions between MERS-CoV and its host, and be applicable to develop strategies targeting PLpro for the effective control of MERS-CoV infection.
DOI: 10.1099/vir.0.059014-0
PubMed: 24362959
Affiliations:
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Amino Acid Sequence</term>
<term>Catalytic Domain</term>
<term>Coronaviridae (chemistry)</term>
<term>Coronaviridae (enzymology)</term>
<term>Coronaviridae (genetics)</term>
<term>Coronaviridae Infections (metabolism)</term>
<term>Coronaviridae Infections (virology)</term>
<term>Humans</term>
<term>Interferon Regulatory Factor-3 (metabolism)</term>
<term>Interferon-beta (antagonists & inhibitors)</term>
<term>Interferon-beta (metabolism)</term>
<term>Molecular Sequence Data</term>
<term>Papain (chemistry)</term>
<term>Papain (genetics)</term>
<term>Papain (metabolism)</term>
<term>Phosphorylation</term>
<term>Polyproteins (genetics)</term>
<term>Polyproteins (metabolism)</term>
<term>Protein Processing, Post-Translational</term>
<term>Proteolysis</term>
<term>Sequence Alignment</term>
<term>Ubiquitin</term>
<term>Ubiquitin-Specific Proteases (chemistry)</term>
<term>Ubiquitin-Specific Proteases (genetics)</term>
<term>Ubiquitin-Specific Proteases (metabolism)</term>
<term>Viral Proteins (chemistry)</term>
<term>Viral Proteins (genetics)</term>
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<term>Coronaviridae (enzymologie)</term>
<term>Coronaviridae (génétique)</term>
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<term>Viral Proteins</term>
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<term>Ubiquitin-specific proteases</term>
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<term>Humains</term>
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<term>Papaïne</term>
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<term>Protéines virales</term>
<term>Protéolyse</term>
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<front><div type="abstract" xml:lang="en">The emerging Middle East respiratory syndrome coronavirus (MERS-CoV) causes severe pulmonary disease in humans and represents the second example of a highly pathogenic coronavirus (CoV) following severe acute respiratory syndrome coronavirus (SARS-CoV). Genomic studies revealed that two viral proteases, papain-like protease (PLpro) and 3C-like protease (3CLpro), process the polyproteins encoded by the MERS-CoV genomic RNA. We previously reported that SARS-CoV PLpro acts as both deubiquitinase (DUB) and IFN antagonist, but the function of the MERS-CoV PLpro was poorly understood. In this study, we characterized MERS-CoV PLpro, which is a protease and can recognize and process the cleavage sites (CS) of nsp1-2, nsp2-3 and nsp3-4. The LXGG consensus cleavage sites in the N terminus of pp1a/1ab, which is generally essential for CoV PLpro-mediated processing, were also characterized in MERS-CoV. MERS-CoV PLpro, like human SARS-CoV PLpro and NL63-CoV PLP2, is a viral deubiquitinating enzyme. It acts on both K48- and K63-linked ubiquitination and ISG15-linked ISGylation. We confirmed that MERS-CoV PLpro acts as an IFN antagonist through blocking the phosphorylation and nuclear translocation of IFN regulatory factor 3 (IRF3). These findings indicate that MERS-CoV PLpro acts as a viral DUB and suppresses production of IFN-β by an interfering IRF3-mediated signalling pathway, in addition to recognizing and processing the CS at the N terminus of replicase polyprotein to release the non-structural proteins. The characterization of proteolytic processing, DUB and IFN antagonist activities of MERS-CoV PLpro would reveal the interactions between MERS-CoV and its host, and be applicable to develop strategies targeting PLpro for the effective control of MERS-CoV infection. </div>
</front>
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