ID   TGB3_PVXHB              Reviewed;          71 AA.
AC   Q07631;
DT   01-OCT-1996, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-1996, sequence version 1.
DT   29-SEP-2021, entry version 65.
DE   RecName: Full=Movement protein TGBp3;
DE   AltName: Full=9.7 kDa protein;
DE   AltName: Full=Triple gene block 3 protein;
DE            Short=TGBp3;
GN   ORFNames=ORF4;
OS   Potato virus X (strain HB) (PVX).
OC   Viruses; Riboviria; Orthornavirae; Kitrinoviricota; Alsuviricetes;
OC   Tymovirales; Alphaflexiviridae; Potexvirus.
OX   NCBI_TaxID=73488;
OH   NCBI_TaxID=3711; Brassica campestris (Field mustard).
OH   NCBI_TaxID=4113; Solanum tuberosum (Potato).
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC RNA].
RX   PubMed=8409947; DOI=10.1099/0022-1317-74-10-2251;
RA   Querci M., van der Vlugt R., Goldbach R., Salazar L.F.;
RT   "RNA sequence of potato virus X strain HB.";
RL   J. Gen. Virol. 74:2251-2255(1993).
RN   [2]
RP   REVIEW.
RX   PubMed=15828680; DOI=10.1094/mpmi-18-0283;
RA   Verchot-Lubicz J.;
RT   "A new cell-to-cell transport model for Potexviruses.";
RL   Mol. Plant Microbe Interact. 18:283-290(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; X72214; CAA51015.1; -; Genomic_RNA.
DR   PIR; JQ2297; JQ2297.
DR   Proteomes; UP000006842; Genome.
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; Reference proteome;
KW   Transmembrane; Transmembrane helix; Transport; Viral movement protein.
FT   CHAIN           1..71
FT                   /note="Movement protein TGBp3"
FT                   /id="PRO_0000222606"
FT   TOPO_DOM        1..3
FT                   /note="Lumenal"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        4..26
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        27..71
FT                   /note="Cytoplasmic"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   71 AA;  7635 MW;  6627D7F7D33DD9A3 CRC64;
     MEAGAYLNAI IFVLVATIIA VISVGLTQTE PCTIRITGES ITVHACHLDS ETIKALATLK
     PLSLERLSFH Q