ID   VEMP_CVMS               Reviewed;          88 AA.
AC   P29076;
DT   01-DEC-1992, integrated into UniProtKB/Swiss-Prot.
DT   01-DEC-1992, sequence version 1.
DT   07-APR-2021, entry version 78.
DE   RecName: Full=Envelope small membrane protein {ECO:0000255|HAMAP-Rule:MF_04204};
DE            Short=E protein {ECO:0000255|HAMAP-Rule:MF_04204};
DE            Short=sM protein {ECO:0000255|HAMAP-Rule:MF_04204};
GN   Name=E {ECO:0000255|HAMAP-Rule:MF_04204}; Synonyms=sM; ORFNames=5b;
OS   Murine coronavirus (strain S) (MHV-S) (Murine hepatitis virus).
OC   Viruses; Riboviria; Orthornavirae; Pisuviricota; Pisoniviricetes;
OC   Nidovirales; Cornidovirineae; Coronaviridae; Orthocoronavirinae;
OC   Betacoronavirus; Embecovirus.
OX   NCBI_TaxID=11145;
OH   NCBI_TaxID=10090; Mus musculus (Mouse).
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC RNA].
RX   PubMed=1654456; DOI=10.1128/jvi.65.10.5605-5608.1991;
RA   Yokomori K., Lai M.M.C.;
RT   "Mouse hepatitis virus S RNA sequence reveals that nonstructural proteins
RT   ns4 and ns5a are not essential for murine coronavirus replication.";
RL   J. Virol. 65:5605-5608(1991).
CC   -!- FUNCTION: Plays a central role in virus morphogenesis and assembly.
CC       Acts as a viroporin and self-assembles in host membranes forming
CC       pentameric protein-lipid pores that allow ion transport. Also plays a
CC       role in the induction of apoptosis. {ECO:0000255|HAMAP-Rule:MF_04204}.
CC   -!- SUBUNIT: Homopentamer. Interacts with membrane protein M in the budding
CC       compartment of the host cell, which is located between endoplasmic
CC       reticulum and the Golgi complex. Interacts with Nucleoprotein.
CC       {ECO:0000255|HAMAP-Rule:MF_04204}.
CC   -!- SUBCELLULAR LOCATION: Host Golgi apparatus membrane {ECO:0000255|HAMAP-
CC       Rule:MF_04204}; Single-pass type III membrane protein
CC       {ECO:0000255|HAMAP-Rule:MF_04204}. Note=The cytoplasmic tail functions
CC       as a Golgi complex-targeting signal. {ECO:0000255|HAMAP-Rule:MF_04204}.
CC   -!- SIMILARITY: Belongs to the betacoronaviruses E protein family.
CC       {ECO:0000255|HAMAP-Rule:MF_04204}.
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DR   EMBL; M64835; -; NOT_ANNOTATED_CDS; Genomic_RNA.
DR   PIR; B40512; MNIHM5.
DR   GO; GO:0044178; C:host cell Golgi membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-UniRule.
DR   GO; GO:0044662; P:disruption by virus of host cell membrane; IEA:UniProtKB-UniRule.
DR   GO; GO:0039707; P:pore formation by virus in membrane of host cell; IEA:InterPro.
DR   GO; GO:0046760; P:viral budding from Golgi membrane; IEA:UniProtKB-UniRule.
DR   CDD; cd21532; HKU1-CoV-like_E; 1.
DR   HAMAP; MF_04204; BETA_CORONA_E; 1.
DR   InterPro; IPR043506; E_protein_bCoV.
DR   InterPro; IPR003873; E_protein_CoV.
DR   Pfam; PF02723; CoV_E; 1.
DR   PROSITE; PS51926; COV_E; 1.
PE   3: Inferred from homology;
KW   Apoptosis; Host Golgi apparatus; Host membrane; Membrane; Transmembrane;
KW   Transmembrane helix.
FT   CHAIN           1..88
FT                   /note="Envelope small membrane protein"
FT                   /id="PRO_0000106089"
FT   TOPO_DOM        1..16
FT                   /note="Virion surface"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_04204"
FT   TRANSMEM        17..37
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_04204"
FT   TOPO_DOM        38..79
FT                   /note="Intravirion"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_04204"
SQ   SEQUENCE   88 AA;  10111 MW;  BC20A6ED42BB525E CRC64;
     MFNLFLTDTV WYVGQIIFIV AVCLMVTITV VAFLASIKLC IQLCGLCNTL VLSPSIYLYD
     RSKQLYKYYN EEVRPPPLEV DDIIIQTL