ID   TGB3_POPMV              Reviewed;          71 AA.
AC   Q02122; Q629I7;
DT   01-OCT-1993, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-1993, sequence version 1.
DT   23-FEB-2022, entry version 55.
DE   RecName: Full=Movement protein TGBp3;
DE   AltName: Full=7 kDa protein;
DE   AltName: Full=Triple gene block 3 protein;
DE            Short=TGBp3;
GN   ORFNames=ORF4;
OS   Poplar mosaic virus (isolate ATCC Pv275) (PMV).
OC   Viruses; Riboviria; Orthornavirae; Kitrinoviricota; Alsuviricetes;
OC   Tymovirales; Betaflexiviridae; Quinvirinae; Carlavirus.
OX   NCBI_TaxID=31709;
OH   NCBI_TaxID=73824; Populus balsamifera (Balsam poplar).
OH   NCBI_TaxID=3696; Populus deltoides (Eastern poplar) (Eastern cottonwood).
OH   NCBI_TaxID=75703; Populus maximowiczii (Japanese poplar).
OH   NCBI_TaxID=3691; Populus nigra (Lombardy poplar).
OH   NCBI_TaxID=3694; Populus trichocarpa (Western balsam poplar) (Populus balsamifera subsp. trichocarpa).
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC RNA].
RX   PubMed=1629709; DOI=10.1099/0022-1317-73-7-1887;
RA   Henderson J., Gibbs M.J., Edwards M.-L., Clarke V.A., Gardner K.A.,
RA   Cooper J.I.;
RT   "Partial nucleotide sequence of poplar mosaic virus RNA confirms its
RT   classification as a carlavirus.";
RL   J. Gen. Virol. 73:1887-1890(1992).
RN   [2]
RP   SEQUENCE REVISION.
RX   PubMed=15664047; DOI=10.1016/j.jviromet.2004.10.007;
RA   Naylor M., Reeves J., Cooper J.I., Edwards M.-L., Wang H.;
RT   "Construction and properties of a gene-silencing vector based on Poplar
RT   mosaic virus (genus Carlavirus).";
RL   J. Virol. Methods 124:27-36(2005).
CC   -!- FUNCTION: Plays a role in viral cell-to-cell propagation, by
CC       facilitating genome transport to neighboring plant cells through
CC       plasmosdesmata. May induce the formation of granular vesicles derived
CC       from the Endoplasmic reticulum, which align on actin filaments (By
CC       similarity). {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Host endoplasmic reticulum membrane
CC       {ECO:0000250}.
CC   -!- MISCELLANEOUS: TGBp1, TGBp2 and TGBp3 seem to act together for cell-to-
CC       cell propagation. TGBp1 is the main movement protein that physically
CC       cross the plasmodesma with the viral genome. TGBp2 and TGBp3 would
CC       facilitate TGBp1 function.
CC   -!- SIMILARITY: Belongs to the Tymovirales TGBp3 protein family.
CC       {ECO:0000305}.
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DR   EMBL; X65102; CAH55776.1; -; Genomic_RNA.
DR   SMR; Q02122; -.
DR   GO; GO:0044167; C:host cell endoplasmic reticulum membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0046740; P:transport of virus in host, cell to cell; IEA:UniProtKB-KW.
DR   InterPro; IPR003411; TGBp3.
DR   Pfam; PF02495; TGBp3; 1.
PE   3: Inferred from homology;
KW   Host endoplasmic reticulum; Host membrane; Membrane; Transmembrane;
KW   Transmembrane helix; Transport; Viral movement protein.
FT   CHAIN           1..71
FT                   /note="Movement protein TGBp3"
FT                   /id="PRO_0000222615"
FT   TOPO_DOM        1..4
FT                   /note="Lumenal"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        5..27
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        28..71
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   71 AA;  7968 MW;  27D38744151EE660 CRC64;
     MWSDSLVSRI CVPIIVVCTS IALLNVVSFR SECSCVVHIS GAAIDIRGCS FTPDFIEYAK
     TLRVFNHRYQ E