Binding of the Methyl Donor S-Adenosyl-l-Methionine to Middle East Respiratory Syndrome Coronavirus 2'-O-Methyltransferase nsp16 Promotes Recruitment of the Allosteric Activator nsp10.
Identifieur interne : 000E34 ( PubMed/Curation ); précédent : 000E33; suivant : 000E35Binding of the Methyl Donor S-Adenosyl-l-Methionine to Middle East Respiratory Syndrome Coronavirus 2'-O-Methyltransferase nsp16 Promotes Recruitment of the Allosteric Activator nsp10.
Auteurs : Wahiba Aouadi [France] ; Alexandre Blanjoie [France] ; Jean-Jacques Vasseur [France] ; Françoise Debart [France] ; Bruno Canard [France] ; Etienne Decroly [France]Source :
- Journal of virology [ 1098-5514 ] ; 2017.
Descripteurs français
- KwdFr :
- ARN viral (), Adémétionine (), Adénosine (), Adénosine (analogues et dérivés), Cinétique, Coronavirus du syndrome respiratoire du Moyen-Orient (enzymologie), Liaison aux protéines, Methyltransferases (), Methyltransferases (antagonistes et inhibiteurs), Multimérisation de protéines, Méthylation, Protéines virales non structurales (), Protéines virales non structurales (antagonistes et inhibiteurs), Régulation allostérique, Séquence nucléotidique.
- MESH :
- analogues et dérivés : Adénosine.
- antagonistes et inhibiteurs : Methyltransferases, Protéines virales non structurales.
- enzymologie : Coronavirus du syndrome respiratoire du Moyen-Orient.
- ARN viral, Adémétionine, Adénosine, Cinétique, Liaison aux protéines, Methyltransferases, Multimérisation de protéines, Méthylation, Protéines virales non structurales, Régulation allostérique, Séquence nucléotidique.
English descriptors
- KwdEn :
- Adenosine (analogs & derivatives), Adenosine (chemistry), Allosteric Regulation, Base Sequence, Kinetics, Methylation, Methyltransferases (antagonists & inhibitors), Methyltransferases (chemistry), Middle East Respiratory Syndrome Coronavirus (enzymology), Protein Binding, Protein Multimerization, RNA, Viral (chemistry), S-Adenosylmethionine (chemistry), Viral Nonstructural Proteins (antagonists & inhibitors), Viral Nonstructural Proteins (chemistry).
- MESH :
- chemical , analogs & derivatives : Adenosine.
- chemical , antagonists & inhibitors : Methyltransferases, Viral Nonstructural Proteins.
- chemical , chemistry : Adenosine, Methyltransferases, RNA, Viral, S-Adenosylmethionine, Viral Nonstructural Proteins.
- enzymology : Middle East Respiratory Syndrome Coronavirus.
- Allosteric Regulation, Base Sequence, Kinetics, Methylation, Protein Binding, Protein Multimerization.
Abstract
The Middle East respiratory syndrome coronavirus (MERS-CoV) nonstructural protein 16 (nsp16) is an S-adenosyl-l-methionine (SAM)-dependent 2'-O-methyltransferase (2'-O-MTase) that is thought to methylate the ribose 2'-OH of the first transcribed nucleotide (N1) of viral RNA cap structures. This 2'-O-MTase activity is regulated by nsp10. The 2'-O methylation prevents virus detection by cell innate immunity mechanisms and viral translation inhibition by the interferon-stimulated IFIT-1 protein. To unravel the regulation of nsp10/nsp16 2'-O-MTase activity, we used purified MERS-CoV nsp16 and nsp10. First, we showed that nsp16 recruited N7-methylated capped RNA and SAM. The SAM binding promotes the assembly of the enzymatically active nsp10/nsp16 complex that converted 7mGpppG (cap-0) into 7mGpppG2'Om (cap-1) RNA by 2'-OH methylation of N1 in a SAM-dependent manner. The subsequent release of SAH speeds up nsp10/nsp16 dissociation that stimulates the reaction turnover. Alanine mutagenesis and RNA binding assays allowed the identification of the nsp16 residues involved in RNA recognition forming the RNA binding groove (K46, K170, E203, D133, R38, Y47, and Y181) and the cap-0 binding site (Y30, Y132, and H174). Finally, we found that nsp10/nsp16 2'-O-MTase activity is sensitive to known MTase inhibitors, such as sinefungin and cap analogues. This characterization of the MERS-CoV 2'-O-MTase is a preliminary step toward the development of molecules to inhibit cap 2'-O methylation and to restore the host antiviral response. IMPORTANCE MERS-CoV codes for a cap 2'-O-methyltransferase that converts cap-0 into cap-1 structure in order to prevent virus detection by cell innate immunity mechanisms. We report the biochemical properties of MERS-CoV 2'O-methyltransferase, which is stimulated by nsp10 acting as an allosteric activator of the nsp16 2'-O-methyltransferase possibly through enhanced RNA binding affinity. In addition, we show that SAM promotes the formation of the active nsp10/nsp16 complex. Conversely, after cap methylation, the reaction turnover is speeded up by cap-1 RNA release and nsp10/nsp16 complex dissociation, at the low intracellular SAH concentration. These results suggest that SAM/SAH balance is a regulator of the 2'-O-methyltransferase activity and raises the possibility that SAH hydrolase inhibitors might interfere with CoV replication cycle. The enzymatic and RNA binding assays developed in this work were also used to identify nsp16 residues involved in cap-0 RNA recognition and to understand the action mode of known methyltransferase inhibitors.
DOI: 10.1128/JVI.02217-16
PubMed: 28031370
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pubmed:28031370Le document en format XML
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-Methyltransferase nsp16 Promotes Recruitment of the Allosteric Activator nsp10.</title>
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-Methyltransferase nsp16 Promotes Recruitment of the Allosteric Activator nsp10.</title>
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<term>Adenosine (chemistry)</term>
<term>Allosteric Regulation</term>
<term>Base Sequence</term>
<term>Kinetics</term>
<term>Methylation</term>
<term>Methyltransferases (antagonists & inhibitors)</term>
<term>Methyltransferases (chemistry)</term>
<term>Middle East Respiratory Syndrome Coronavirus (enzymology)</term>
<term>Protein Binding</term>
<term>Protein Multimerization</term>
<term>RNA, Viral (chemistry)</term>
<term>S-Adenosylmethionine (chemistry)</term>
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<term>Adémétionine ()</term>
<term>Adénosine ()</term>
<term>Adénosine (analogues et dérivés)</term>
<term>Cinétique</term>
<term>Coronavirus du syndrome respiratoire du Moyen-Orient (enzymologie)</term>
<term>Liaison aux protéines</term>
<term>Methyltransferases ()</term>
<term>Methyltransferases (antagonistes et inhibiteurs)</term>
<term>Multimérisation de protéines</term>
<term>Méthylation</term>
<term>Protéines virales non structurales ()</term>
<term>Protéines virales non structurales (antagonistes et inhibiteurs)</term>
<term>Régulation allostérique</term>
<term>Séquence nucléotidique</term>
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<term>Viral Nonstructural Proteins</term>
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<term>Methyltransferases</term>
<term>RNA, Viral</term>
<term>S-Adenosylmethionine</term>
<term>Viral Nonstructural Proteins</term>
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<term>Base Sequence</term>
<term>Kinetics</term>
<term>Methylation</term>
<term>Protein Binding</term>
<term>Protein Multimerization</term>
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<front><div type="abstract" xml:lang="en">The Middle East respiratory syndrome coronavirus (MERS-CoV) nonstructural protein 16 (nsp16) is an <i>S</i>
-adenosyl-l-methionine (SAM)-dependent 2'-<i>O</i>
-methyltransferase (2'-O-MTase) that is thought to methylate the ribose 2'-OH of the first transcribed nucleotide (N<sub>1</sub>
) of viral RNA cap structures. This 2'-O-MTase activity is regulated by nsp10. The 2'-<i>O</i>
methylation prevents virus detection by cell innate immunity mechanisms and viral translation inhibition by the interferon-stimulated IFIT-1 protein. To unravel the regulation of nsp10/nsp16 2'-O-MTase activity, we used purified MERS-CoV nsp16 and nsp10. First, we showed that nsp16 recruited N7-methylated capped RNA and SAM. The SAM binding promotes the assembly of the enzymatically active nsp10/nsp16 complex that converted <sup>7m</sup>
GpppG (cap-0) into <sup>7m</sup>
GpppG<sub>2'Om</sub>
(cap-1) RNA by 2'-OH methylation of N<sub>1</sub>
in a SAM-dependent manner. The subsequent release of SAH speeds up nsp10/nsp16 dissociation that stimulates the reaction turnover. Alanine mutagenesis and RNA binding assays allowed the identification of the nsp16 residues involved in RNA recognition forming the RNA binding groove (K46, K170, E203, D133, R38, Y47, and Y181) and the cap-0 binding site (Y30, Y132, and H174). Finally, we found that nsp10/nsp16 2'-O-MTase activity is sensitive to known MTase inhibitors, such as sinefungin and cap analogues. This characterization of the MERS-CoV 2'-O-MTase is a preliminary step toward the development of molecules to inhibit cap 2'-O methylation and to restore the host antiviral response. <b>IMPORTANCE</b>
MERS-CoV codes for a cap 2'-<i>O</i>
-methyltransferase that converts cap-0 into cap-1 structure in order to prevent virus detection by cell innate immunity mechanisms. We report the biochemical properties of MERS-CoV 2'O-methyltransferase, which is stimulated by nsp10 acting as an allosteric activator of the nsp16 2'-<i>O</i>
-methyltransferase possibly through enhanced RNA binding affinity. In addition, we show that SAM promotes the formation of the active nsp10/nsp16 complex. Conversely, after cap methylation, the reaction turnover is speeded up by cap-1 RNA release and nsp10/nsp16 complex dissociation, at the low intracellular SAH concentration. These results suggest that SAM/SAH balance is a regulator of the 2'-<i>O</i>
-methyltransferase activity and raises the possibility that SAH hydrolase inhibitors might interfere with CoV replication cycle. The enzymatic and RNA binding assays developed in this work were also used to identify nsp16 residues involved in cap-0 RNA recognition and to understand the action mode of known methyltransferase inhibitors.</div>
</front>
</TEI>
<pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">28031370</PMID>
<DateCompleted><Year>2017</Year>
<Month>05</Month>
<Day>29</Day>
</DateCompleted>
<DateRevised><Year>2019</Year>
<Month>03</Month>
<Day>29</Day>
</DateRevised>
<Article PubModel="Electronic-Print"><Journal><ISSN IssnType="Electronic">1098-5514</ISSN>
<JournalIssue CitedMedium="Internet"><Volume>91</Volume>
<Issue>5</Issue>
<PubDate><Year>2017</Year>
<Month>03</Month>
<Day>01</Day>
</PubDate>
</JournalIssue>
<Title>Journal of virology</Title>
<ISOAbbreviation>J. Virol.</ISOAbbreviation>
</Journal>
<ArticleTitle>Binding of the Methyl Donor <i>S</i>
-Adenosyl-l-Methionine to Middle East Respiratory Syndrome Coronavirus 2'-<i>O</i>
-Methyltransferase nsp16 Promotes Recruitment of the Allosteric Activator nsp10.</ArticleTitle>
<ELocationID EIdType="pii" ValidYN="Y">e02217-16</ELocationID>
<ELocationID EIdType="doi" ValidYN="Y">10.1128/JVI.02217-16</ELocationID>
<Abstract><AbstractText>The Middle East respiratory syndrome coronavirus (MERS-CoV) nonstructural protein 16 (nsp16) is an <i>S</i>
-adenosyl-l-methionine (SAM)-dependent 2'-<i>O</i>
-methyltransferase (2'-O-MTase) that is thought to methylate the ribose 2'-OH of the first transcribed nucleotide (N<sub>1</sub>
) of viral RNA cap structures. This 2'-O-MTase activity is regulated by nsp10. The 2'-<i>O</i>
methylation prevents virus detection by cell innate immunity mechanisms and viral translation inhibition by the interferon-stimulated IFIT-1 protein. To unravel the regulation of nsp10/nsp16 2'-O-MTase activity, we used purified MERS-CoV nsp16 and nsp10. First, we showed that nsp16 recruited N7-methylated capped RNA and SAM. The SAM binding promotes the assembly of the enzymatically active nsp10/nsp16 complex that converted <sup>7m</sup>
GpppG (cap-0) into <sup>7m</sup>
GpppG<sub>2'Om</sub>
(cap-1) RNA by 2'-OH methylation of N<sub>1</sub>
in a SAM-dependent manner. The subsequent release of SAH speeds up nsp10/nsp16 dissociation that stimulates the reaction turnover. Alanine mutagenesis and RNA binding assays allowed the identification of the nsp16 residues involved in RNA recognition forming the RNA binding groove (K46, K170, E203, D133, R38, Y47, and Y181) and the cap-0 binding site (Y30, Y132, and H174). Finally, we found that nsp10/nsp16 2'-O-MTase activity is sensitive to known MTase inhibitors, such as sinefungin and cap analogues. This characterization of the MERS-CoV 2'-O-MTase is a preliminary step toward the development of molecules to inhibit cap 2'-O methylation and to restore the host antiviral response. <b>IMPORTANCE</b>
MERS-CoV codes for a cap 2'-<i>O</i>
-methyltransferase that converts cap-0 into cap-1 structure in order to prevent virus detection by cell innate immunity mechanisms. We report the biochemical properties of MERS-CoV 2'O-methyltransferase, which is stimulated by nsp10 acting as an allosteric activator of the nsp16 2'-<i>O</i>
-methyltransferase possibly through enhanced RNA binding affinity. In addition, we show that SAM promotes the formation of the active nsp10/nsp16 complex. Conversely, after cap methylation, the reaction turnover is speeded up by cap-1 RNA release and nsp10/nsp16 complex dissociation, at the low intracellular SAH concentration. These results suggest that SAM/SAH balance is a regulator of the 2'-<i>O</i>
-methyltransferase activity and raises the possibility that SAH hydrolase inhibitors might interfere with CoV replication cycle. The enzymatic and RNA binding assays developed in this work were also used to identify nsp16 residues involved in cap-0 RNA recognition and to understand the action mode of known methyltransferase inhibitors.</AbstractText>
<CopyrightInformation>Copyright © 2017 American Society for Microbiology.</CopyrightInformation>
</Abstract>
<AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Aouadi</LastName>
<ForeName>Wahiba</ForeName>
<Initials>W</Initials>
<AffiliationInfo><Affiliation>Aix-Marseille Université, AFMB UMR 7257, Marseille, France.</Affiliation>
</AffiliationInfo>
<AffiliationInfo><Affiliation>CNRS, AFMB UMR 7257, Marseille, France.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Blanjoie</LastName>
<ForeName>Alexandre</ForeName>
<Initials>A</Initials>
<AffiliationInfo><Affiliation>IBMM, UMR 5247 CNRS, UM, ENSCM, Department of Nucleic Acids, Montpellier University, Montpellier, France.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Vasseur</LastName>
<ForeName>Jean-Jacques</ForeName>
<Initials>JJ</Initials>
<AffiliationInfo><Affiliation>IBMM, UMR 5247 CNRS, UM, ENSCM, Department of Nucleic Acids, Montpellier University, Montpellier, France.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Debart</LastName>
<ForeName>Françoise</ForeName>
<Initials>F</Initials>
<AffiliationInfo><Affiliation>IBMM, UMR 5247 CNRS, UM, ENSCM, Department of Nucleic Acids, Montpellier University, Montpellier, France.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Canard</LastName>
<ForeName>Bruno</ForeName>
<Initials>B</Initials>
<AffiliationInfo><Affiliation>Aix-Marseille Université, AFMB UMR 7257, Marseille, France.</Affiliation>
</AffiliationInfo>
<AffiliationInfo><Affiliation>CNRS, AFMB UMR 7257, Marseille, France.</Affiliation>
</AffiliationInfo>
</Author>
<Author ValidYN="Y"><LastName>Decroly</LastName>
<ForeName>Etienne</ForeName>
<Initials>E</Initials>
<AffiliationInfo><Affiliation>Aix-Marseille Université, AFMB UMR 7257, Marseille, France etienne.decroly@afmb.univ-mrs.fr.</Affiliation>
</AffiliationInfo>
<AffiliationInfo><Affiliation>CNRS, AFMB UMR 7257, Marseille, France.</Affiliation>
</AffiliationInfo>
</Author>
</AuthorList>
<Language>eng</Language>
<PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType>
<PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType>
</PublicationTypeList>
<ArticleDate DateType="Electronic"><Year>2017</Year>
<Month>02</Month>
<Day>14</Day>
</ArticleDate>
</Article>
<MedlineJournalInfo><Country>United States</Country>
<MedlineTA>J Virol</MedlineTA>
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<ISSNLinking>0022-538X</ISSNLinking>
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