ID   CAPSD_BPI22             Reviewed;          84 AA.
AC   P15416;
DT   01-APR-1990, integrated into UniProtKB/Swiss-Prot.
DT   01-APR-1990, sequence version 1.
DT   02-DEC-2020, entry version 94.
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;
DE   Flags: Precursor;
GN   Name=VIII;
OS   Enterobacteria phage I2-2 (Bacteriophage I2-2).
OC   Viruses; Monodnaviria; Loebvirae; Hofneiviricota; Faserviricetes;
OC   Tubulavirales; Inoviridae; Lineavirus.
OX   NCBI_TaxID=10869;
OH   NCBI_TaxID=562; Escherichia coli.
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=1556749; DOI=10.1007/bf00182391;
RA   Stassen A.P., Schonmakers E.F., Yu M., Schoenmakers J.G., Konings R.N.H.;
RT   "Nucleotide sequence of the genome of the filamentous bacteriophage I2-2:
RT   module evolution of the filamentous phage genome.";
RL   J. Mol. Evol. 34:141-152(1992).
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   EMBL; X14336; CAA32517.1; -; Genomic_DNA.
DR   PIR; S08090; S08090.
DR   RefSeq; NP_039620.1; NC_001332.1.
DR   SMR; P15416; -.
DR   GeneID; 1260722; -.
DR   KEGG; vg:1260722; -.
DR   Proteomes; UP000000373; Genome.
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   3: Inferred from homology;
KW   Capsid protein; Helical capsid protein; Host membrane; Membrane;
KW   Reference proteome; Signal; Transmembrane; Transmembrane helix; Virion.
FT   SIGNAL          1..29
FT   CHAIN           30..84
FT                   /note="Capsid protein G8P"
FT                   /id="PRO_0000003299"
FT   TOPO_DOM        30..58
FT                   /note="Periplasmic"
FT   TRANSMEM        59..76
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        77..84
FT                   /note="Cytoplasmic"
SQ   SEQUENCE   84 AA;  8551 MW;  409884A4E186A2EC CRC64;
     MSVITKVAAA KNKIVVGAGL LMASAGAFAA DDGTSTATSY ATEAMNSLKT QATDLIDQTW
     PVVTSVAVAG LAIRLFKKFS SKAV