Severe acute respiratory syndrome coronavirus protein nsp1 is a novel eukaryotic translation inhibitor that represses multiple steps of translation initiation.
Identifieur interne : 001283 ( PubMed/Checkpoint ); précédent : 001282; suivant : 001284Severe acute respiratory syndrome coronavirus protein nsp1 is a novel eukaryotic translation inhibitor that represses multiple steps of translation initiation.
Auteurs : Kumari G. Lokugamage [États-Unis] ; Krishna Narayanan ; Cheng Huang ; Shinji MakinoSource :
- Journal of virology [ 1098-5514 ] ; 2012.
Descripteurs français
- KwdFr :
- MESH :
- génétique : ARN messager, ARN viral, Virus du SRAS.
- métabolisme : Virus du SRAS.
- physiologie : Biosynthèse des protéines, Protéines virales non structurales, RNA replicase.
- Amorces ADN, Séquence nucléotidique.
English descriptors
- KwdEn :
- MESH :
- chemical , genetics : RNA, Messenger, RNA, Viral.
- chemical , physiology : RNA Replicase, Viral Nonstructural Proteins.
- chemical : DNA Primers.
- genetics : SARS Virus.
- metabolism : SARS Virus.
- physiology : Protein Biosynthesis.
- Base Sequence.
Abstract
Severe acute respiratory syndrome (SARS) coronavirus nonstructural protein 1 (nsp1) binds to the 40S ribosomal subunit and inhibits translation, and it also induces a template-dependent endonucleolytic cleavage of host mRNAs. nsp1 inhibits the translation of cap-dependent and internal ribosome entry site (IRES)-driven mRNAs, including SARS coronavirus mRNAs, hepatitis C virus (HCV), and cricket paralysis virus (CrPV) IRES-driven mRNAs that are resistant to nsp1-induced RNA cleavage. We used an nsp1 mutant, nsp1-CD, lacking the RNA cleavage function, to delineate the mechanism of nsp1-mediated translation inhibition and identify the translation step(s) targeted by nsp1. nsp1 and nsp1-CD had identical inhibitory effects on mRNA templates that are resistant to nsp1-induced RNA cleavage, implying the validity of using nsp1-CD to dissect the translation inhibition function of nsp1. We provide evidence for a novel mode of action of nsp1. nsp1 inhibited the translation initiation step by targeting at least two separate stages: 48S initiation complex formation and the steps involved in the formation of the 80S initiation complex from the 48S complex. nsp1 had a differential, mRNA template-dependent, inhibitory effect on 48S and 80S initiation complex formation. nsp1 inhibited different steps of translation initiation on CrPV and HCV IRES, both of which initiate translation via an IRES-40S binary complex intermediate; nsp1 inhibited binary complex formation on CrPV IRES and 48S complex formation on HCV IRES. Collectively, the data revealed that nsp1 inhibited translation by exerting its effect on multiple stages of translation initiation, depending on the mechanism of initiation operating on the mRNA template.
DOI: 10.1128/JVI.01958-12
PubMed: 23035226
Affiliations:
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Lokugamage</name><affiliation wicri:level="2"><nlm:affiliation>Department of Microbiology and Immunology, The University of Texas Medical Branch, Galveston, Texas, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Microbiology and Immunology, The University of Texas Medical Branch, Galveston, Texas</wicri:regionArea><placeName><region type="state">Texas</region></placeName></affiliation></author><author><name sortKey="Narayanan, Krishna" sort="Narayanan, Krishna" uniqKey="Narayanan K" first="Krishna" last="Narayanan">Krishna Narayanan</name></author><author><name sortKey="Huang, Cheng" sort="Huang, Cheng" uniqKey="Huang C" first="Cheng" last="Huang">Cheng Huang</name></author><author><name sortKey="Makino, Shinji" sort="Makino, Shinji" uniqKey="Makino S" first="Shinji" last="Makino">Shinji Makino</name></author></analytic><series><title level="j">Journal of virology</title><idno type="eISSN">1098-5514</idno><imprint><date when="2012" type="published">2012</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Base Sequence</term><term>DNA Primers</term><term>Protein Biosynthesis (physiology)</term><term>RNA Replicase (physiology)</term><term>RNA, Messenger (genetics)</term><term>RNA, Viral (genetics)</term><term>SARS Virus (genetics)</term><term>SARS Virus (metabolism)</term><term>Viral Nonstructural Proteins (physiology)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>ARN messager (génétique)</term><term>ARN viral (génétique)</term><term>Amorces ADN</term><term>Biosynthèse des protéines (physiologie)</term><term>Protéines virales non structurales (physiologie)</term><term>RNA replicase (physiologie)</term><term>Séquence nucléotidique</term><term>Virus du SRAS (génétique)</term><term>Virus du SRAS (métabolisme)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="genetics" xml:lang="en"><term>RNA, Messenger</term><term>RNA, Viral</term></keywords><keywords scheme="MESH" type="chemical" qualifier="physiology" xml:lang="en"><term>RNA Replicase</term><term>Viral Nonstructural Proteins</term></keywords><keywords scheme="MESH" type="chemical" xml:lang="en"><term>DNA Primers</term></keywords><keywords scheme="MESH" qualifier="genetics" xml:lang="en"><term>SARS Virus</term></keywords><keywords scheme="MESH" qualifier="génétique" xml:lang="fr"><term>ARN messager</term><term>ARN viral</term><term>Virus du SRAS</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>SARS Virus</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Virus du SRAS</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Biosynthèse des protéines</term><term>Protéines virales non structurales</term><term>RNA replicase</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Protein Biosynthesis</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Base Sequence</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Amorces ADN</term><term>Séquence nucléotidique</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Severe acute respiratory syndrome (SARS) coronavirus nonstructural protein 1 (nsp1) binds to the 40S ribosomal subunit and inhibits translation, and it also induces a template-dependent endonucleolytic cleavage of host mRNAs. nsp1 inhibits the translation of cap-dependent and internal ribosome entry site (IRES)-driven mRNAs, including SARS coronavirus mRNAs, hepatitis C virus (HCV), and cricket paralysis virus (CrPV) IRES-driven mRNAs that are resistant to nsp1-induced RNA cleavage. We used an nsp1 mutant, nsp1-CD, lacking the RNA cleavage function, to delineate the mechanism of nsp1-mediated translation inhibition and identify the translation step(s) targeted by nsp1. nsp1 and nsp1-CD had identical inhibitory effects on mRNA templates that are resistant to nsp1-induced RNA cleavage, implying the validity of using nsp1-CD to dissect the translation inhibition function of nsp1. We provide evidence for a novel mode of action of nsp1. nsp1 inhibited the translation initiation step by targeting at least two separate stages: 48S initiation complex formation and the steps involved in the formation of the 80S initiation complex from the 48S complex. nsp1 had a differential, mRNA template-dependent, inhibitory effect on 48S and 80S initiation complex formation. nsp1 inhibited different steps of translation initiation on CrPV and HCV IRES, both of which initiate translation via an IRES-40S binary complex intermediate; nsp1 inhibited binary complex formation on CrPV IRES and 48S complex formation on HCV IRES. Collectively, the data revealed that nsp1 inhibited translation by exerting its effect on multiple stages of translation initiation, depending on the mechanism of initiation operating on the mRNA template.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">23035226</PMID><DateCompleted><Year>2013</Year><Month>01</Month><Day>28</Day></DateCompleted><DateRevised><Year>2018</Year><Month>11</Month><Day>13</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1098-5514</ISSN><JournalIssue CitedMedium="Internet"><Volume>86</Volume><Issue>24</Issue><PubDate><Year>2012</Year><Month>Dec</Month></PubDate></JournalIssue><Title>Journal of virology</Title><ISOAbbreviation>J. Virol.</ISOAbbreviation></Journal><ArticleTitle>Severe acute respiratory syndrome coronavirus protein nsp1 is a novel eukaryotic translation inhibitor that represses multiple steps of translation initiation.</ArticleTitle><Pagination><MedlinePgn>13598-608</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1128/JVI.01958-12</ELocationID><Abstract><AbstractText>Severe acute respiratory syndrome (SARS) coronavirus nonstructural protein 1 (nsp1) binds to the 40S ribosomal subunit and inhibits translation, and it also induces a template-dependent endonucleolytic cleavage of host mRNAs. nsp1 inhibits the translation of cap-dependent and internal ribosome entry site (IRES)-driven mRNAs, including SARS coronavirus mRNAs, hepatitis C virus (HCV), and cricket paralysis virus (CrPV) IRES-driven mRNAs that are resistant to nsp1-induced RNA cleavage. We used an nsp1 mutant, nsp1-CD, lacking the RNA cleavage function, to delineate the mechanism of nsp1-mediated translation inhibition and identify the translation step(s) targeted by nsp1. nsp1 and nsp1-CD had identical inhibitory effects on mRNA templates that are resistant to nsp1-induced RNA cleavage, implying the validity of using nsp1-CD to dissect the translation inhibition function of nsp1. We provide evidence for a novel mode of action of nsp1. nsp1 inhibited the translation initiation step by targeting at least two separate stages: 48S initiation complex formation and the steps involved in the formation of the 80S initiation complex from the 48S complex. nsp1 had a differential, mRNA template-dependent, inhibitory effect on 48S and 80S initiation complex formation. nsp1 inhibited different steps of translation initiation on CrPV and HCV IRES, both of which initiate translation via an IRES-40S binary complex intermediate; nsp1 inhibited binary complex formation on CrPV IRES and 48S complex formation on HCV IRES. Collectively, the data revealed that nsp1 inhibited translation by exerting its effect on multiple stages of translation initiation, depending on the mechanism of initiation operating on the mRNA template.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Lokugamage</LastName><ForeName>Kumari G</ForeName><Initials>KG</Initials><AffiliationInfo><Affiliation>Department of Microbiology and Immunology, The University of Texas Medical Branch, Galveston, Texas, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Narayanan</LastName><ForeName>Krishna</ForeName><Initials>K</Initials></Author><Author ValidYN="Y"><LastName>Huang</LastName><ForeName>Cheng</ForeName><Initials>C</Initials></Author><Author ValidYN="Y"><LastName>Makino</LastName><ForeName>Shinji</ForeName><Initials>S</Initials></Author></AuthorList><Language>eng</Language><GrantList CompleteYN="Y"><Grant><GrantID>R01 AI072493</GrantID><Acronym>AI</Acronym><Agency>NIAID NIH 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Kumari G" sort="Lokugamage, Kumari G" uniqKey="Lokugamage K" first="Kumari G" last="Lokugamage">Kumari G. 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