ID   CAPSD_BPZJ2             Reviewed;          50 AA.
AC   P03618;
DT   21-JUL-1986, integrated into UniProtKB/Swiss-Prot.
DT   21-JUL-1986, sequence version 1.
DT   02-DEC-2020, entry version 78.
DE   RecName: Full=Capsid protein G8P;
DE   AltName: Full=Coat protein B;
DE   AltName: Full=Gene 8 protein;
DE            Short=G8P;
DE   AltName: Full=Major coat protein;
GN   Name=VIII;
OS   Enterobacteria phage ZJ/2 (Bacteriophage ZJ-2).
OC   Viruses; Monodnaviria; Loebvirae; Hofneiviricota; Faserviricetes;
OC   Tubulavirales; Inoviridae; unclassified Inoviridae.
OX   NCBI_TaxID=10866;
OH   NCBI_TaxID=562; Escherichia coli.
RN   [1]
RP   PROTEIN SEQUENCE.
RX   PubMed=5073740; DOI=10.1042/bj1270167;
RA   Snell D.T., Offord R.E.;
RT   "The amino acid sequence of the B-protein of bacteriophage ZJ-2.";
RL   Biochem. J. 127:167-178(1972).
CC   -!- FUNCTION: Self assembles to form a helical capsid wrapping up the viral
CC       genomic DNA. The capsid displays a filamentous structure with a length
CC       of 760-1950 nm and a width of 6-8 nm. The virion assembly and budding
CC       take place at the host inner membrane (By similarity). {ECO:0000250}.
CC   -!- SUBUNIT: Homomultimerizes. There are several thousands of this protein
CC       in the phage capsid (By similarity). {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Virion {ECO:0000305}. Host membrane; Single-pass
CC       type I membrane protein. Note=prior to assembly, the major capsid
CC       protein is found associated with the bacterial host inner membrane.
CC       {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the inovirus capsid protein family.
CC       {ECO:0000305}.
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DR   PIR; H04226; VCBPZ2.
DR   BMRB; P03618; -.
DR   SMR; P03618; -.
DR   GO; GO:0019029; C:helical viral capsid; IEA:UniProtKB-KW.
DR   GO; GO:0033644; C:host cell membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   Gene3D; 1.20.5.80; -; 1.
DR   InterPro; IPR008020; G8P.
DR   InterPro; IPR023390; Phage_M13_G8P_capsid_dom_sf.
DR   Pfam; PF19199; Phage_coatGP8; 1.
DR   PIRSF; PIRSF004117; Phage_coat_B; 1.
PE   1: Evidence at protein level;
KW   Capsid protein; Direct protein sequencing; Helical capsid protein;
KW   Host membrane; Membrane; Transmembrane; Transmembrane helix; Virion.
FT   CHAIN           1..50
FT                   /note="Capsid protein G8P"
FT                   /id="PRO_0000098188"
FT   TOPO_DOM        1..21
FT                   /note="Periplasmic"
FT   TRANSMEM        22..42
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        43..50
FT                   /note="Cytoplasmic"
FT   NON_TER         1
SQ   SEQUENCE   50 AA;  5209 MW;  B0AA31F1B5460C27 CRC64;
     AEGDDPAKAA FDSLQASATE YIGYAWAMVV VIVGATIGIK LFKKFASKAS