ID   CAPSD_BPXF              Reviewed;          44 AA.
AC   P03622;
DT   21-JUL-1986, integrated into UniProtKB/Swiss-Prot.
DT   21-JUL-1986, sequence version 1.
DT   02-JUN-2021, entry version 83.
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   Xanthomonas phage Xf (Bacteriophage Xf).
OC   Viruses; Monodnaviria; Loebvirae; Hofneiviricota; Faserviricetes;
OC   Tubulavirales; Inoviridae; unclassified Inoviridae.
OX   NCBI_TaxID=356629;
OH   NCBI_TaxID=314227; Xanthomonas campestris pv. oryzae.
RN   [1]
RP   PROTEIN SEQUENCE, AND ACETYLATION AT SER-1.
RX   PubMed=729805; DOI=10.1016/0014-5793(78)80442-6;
RA   Frangione B., Nakashima Y., Konigsberg W., Wiseman R.L.;
RT   "The amino acid sequence of the major coat protein subunit of the
RT   filamentous virus Xf.";
RL   FEBS Lett. 96:381-384(1978).
RN   [2]
RP   3D-STRUCTURE MODELING.
RX   PubMed=2078529; DOI=10.1016/0141-8130(90)90064-h;
RA   Marvin D.A.;
RT   "Model-building studies of Inovirus: genetic variations on a geometric
RT   theme.";
RL   Int. J. Biol. Macromol. 12:125-138(1990).
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       membrane protein. Note=prior to assembly, the major capsid protein is
CC       found associated with the bacterial host inner membrane. {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the inovirus capsid protein family.
CC       {ECO:0000305}.
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DR   PIR; A04230; VCBPXF.
DR   PDB; 2IFO; Fiber; -; A=5-44.
DR   PDBsum; 2IFO; -.
DR   SMR; P03622; -.
DR   iPTMnet; P03622; -.
DR   EvolutionaryTrace; P03622; -.
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   InterPro; IPR008020; G8P.
DR   Pfam; PF05356; Phage_Coat_B; 1.
PE   1: Evidence at protein level;
KW   3D-structure; Acetylation; Capsid protein; Direct protein sequencing;
KW   Helical capsid protein; Host membrane; Membrane; Transmembrane;
KW   Transmembrane helix; Virion.
FT   CHAIN           1..44
FT                   /note="Capsid protein G8P"
FT                   /id="PRO_0000098187"
FT   TOPO_DOM        1..19
FT                   /note="Periplasmic"
FT   TRANSMEM        20..37
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TOPO_DOM        38..44
FT                   /note="Cytoplasmic"
FT   MOD_RES         1
FT                   /note="N-acetylserine; by host"
FT                   /evidence="ECO:0000269|PubMed:729805"
FT   NON_TER         1
FT   HELIX           6..42
FT                   /evidence="ECO:0007829|PDB:2IFO"
SQ   SEQUENCE   44 AA;  4342 MW;  ACC9223F5DE63D28 CRC64;
     SGVGDGVDVV SAIEGAAGPI AAIGGAVLTV MVGIKVYKWV RRAM