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The cytoplasmic tail of the severe acute respiratory syndrome coronavirus spike protein contains a novel endoplasmic reticulum retrieval signal that binds COPI and promotes interaction with membrane protein

Identifieur interne : 000589 ( PascalFrancis/Curation ); précédent : 000588; suivant : 000590

The cytoplasmic tail of the severe acute respiratory syndrome coronavirus spike protein contains a novel endoplasmic reticulum retrieval signal that binds COPI and promotes interaction with membrane protein

Auteurs : Corrin E. Mcbride [États-Unis] ; JIE LI [États-Unis] ; Carolyn E. Machamer [États-Unis]

Source :

RBID : Pascal:07-0143955

Descripteurs français

English descriptors

Abstract

Like other coronaviruses, severe acute respiratory syndrome coronavirus (SARS CoV) assembles at and buds into the lumen of the endoplasmic reticulum (ER)-Golgi intermediate compartment (ERGIC). Accumulation of the viral envelope proteins at this compartment is a prerequisite for virus assembly. Previously, we reported the identification of a dibasic motif (KxHxx) in the cytoplasmic tail of the SARS CoV spike (S) protein that was similar to a canonical dilysine ER retrieval signal. Here we demonstrate that this motif is a novel and functional ER retrieval signal which reduced the rate of traffic of the full-length S protein through the Golgi complex. The KxHxx motif also partially retained two different reporter proteins in the ERGIC region and reduced their rates of trafficking, although the motif was less potent than the canonical dilysine signal. The dibasic motif bound the coatomer complex I (COPI) in an in vitro binding assay, suggesting that ER retrieval may contribute to the accumulation of SARS CoV S protein near the virus assembly site for interaction with other viral structural proteins. In support of this, we found that the dibasic motif on the SARS S protein was required for its localization to the ERGIC/Golgi region when coexpressed with SARS membrane (M) protein. Thus, the cycling of SARS S through the ER-Golgi system may be required for its incorporation into assembling virions in the ERGIC.
pA  
A01 01  1    @0 0022-538X
A03   1    @0 J. virol.
A05       @2 81
A06       @2 5
A08 01  1  ENG  @1 The cytoplasmic tail of the severe acute respiratory syndrome coronavirus spike protein contains a novel endoplasmic reticulum retrieval signal that binds COPI and promotes interaction with membrane protein
A11 01  1    @1 MCBRIDE (Corrin E.)
A11 02  1    @1 JIE LI
A11 03  1    @1 MACHAMER (Carolyn E.)
A14 01      @1 Department of Cell Biology, The Johns Hopkins University School of Medicine @2 Baltimore, Maryland 21205 @3 USA @Z 1 aut. @Z 2 aut. @Z 3 aut.
A20       @1 2418-2428
A21       @1 2007
A23 01      @0 ENG
A43 01      @1 INIST @2 13592 @5 354000143268060320
A44       @0 0000 @1 © 2007 INIST-CNRS. All rights reserved.
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A47 01  1    @0 07-0143955
A60       @1 P
A61       @0 A
A64 01  1    @0 Journal of virology
A66 01      @0 USA
C01 01    ENG  @0 Like other coronaviruses, severe acute respiratory syndrome coronavirus (SARS CoV) assembles at and buds into the lumen of the endoplasmic reticulum (ER)-Golgi intermediate compartment (ERGIC). Accumulation of the viral envelope proteins at this compartment is a prerequisite for virus assembly. Previously, we reported the identification of a dibasic motif (KxHxx) in the cytoplasmic tail of the SARS CoV spike (S) protein that was similar to a canonical dilysine ER retrieval signal. Here we demonstrate that this motif is a novel and functional ER retrieval signal which reduced the rate of traffic of the full-length S protein through the Golgi complex. The KxHxx motif also partially retained two different reporter proteins in the ERGIC region and reduced their rates of trafficking, although the motif was less potent than the canonical dilysine signal. The dibasic motif bound the coatomer complex I (COPI) in an in vitro binding assay, suggesting that ER retrieval may contribute to the accumulation of SARS CoV S protein near the virus assembly site for interaction with other viral structural proteins. In support of this, we found that the dibasic motif on the SARS S protein was required for its localization to the ERGIC/Golgi region when coexpressed with SARS membrane (M) protein. Thus, the cycling of SARS S through the ER-Golgi system may be required for its incorporation into assembling virions in the ERGIC.
C02 01  X    @0 002A05C10
C03 01  X  FRE  @0 Coronavirus @2 NW @5 01
C03 01  X  ENG  @0 Coronavirus @2 NW @5 01
C03 01  X  SPA  @0 Coronavirus @2 NW @5 01
C03 02  X  FRE  @0 Protéine membranaire @5 05
C03 02  X  ENG  @0 Membrane protein @5 05
C03 02  X  SPA  @0 Proteína membranar @5 05
C03 03  X  FRE  @0 Réticulum endoplasmique @5 06
C03 03  X  ENG  @0 Endoplasmic reticulum @5 06
C03 03  X  SPA  @0 Retículo endoplásmico @5 06
C03 04  X  FRE  @0 Virologie @5 07
C03 04  X  ENG  @0 Virology @5 07
C03 04  X  SPA  @0 Virología @5 07
C03 05  X  FRE  @0 Syndrome respiratoire aigu sévère @2 NM @5 14
C03 05  X  ENG  @0 Severe acute respiratory syndrome @2 NM @5 14
C03 05  X  SPA  @0 Síndrome respiratorio agudo severo @2 NM @5 14
C07 01  X  FRE  @0 Coronaviridae @2 NW
C07 01  X  ENG  @0 Coronaviridae @2 NW
C07 01  X  SPA  @0 Coronaviridae @2 NW
C07 02  X  FRE  @0 Nidovirales @2 NW
C07 02  X  ENG  @0 Nidovirales @2 NW
C07 02  X  SPA  @0 Nidovirales @2 NW
C07 03  X  FRE  @0 Virus @2 NW
C07 03  X  ENG  @0 Virus @2 NW
C07 03  X  SPA  @0 Virus @2 NW
C07 04  X  FRE  @0 Appareil respiratoire pathologie @5 13
C07 04  X  ENG  @0 Respiratory disease @5 13
C07 04  X  SPA  @0 Aparato respiratorio patología @5 13
C07 05  X  FRE  @0 Virose
C07 05  X  ENG  @0 Viral disease
C07 05  X  SPA  @0 Virosis
C07 06  X  FRE  @0 Infection
C07 06  X  ENG  @0 Infection
C07 06  X  SPA  @0 Infección
C07 07  X  FRE  @0 Poumon pathologie @5 16
C07 07  X  ENG  @0 Lung disease @5 16
C07 07  X  SPA  @0 Pulmón patología @5 16
N21       @1 092
N44 01      @1 OTO
N82       @1 OTO

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Pascal:07-0143955

Le document en format XML

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