ID   G6P_BPIF1               Reviewed;         113 AA.
AC   O80298;
DT   15-JUL-1999, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1998, sequence version 1.
DT   29-SEP-2021, entry version 61.
DE   RecName: Full=Head virion protein G6P;
DE   AltName: Full=Coat protein D;
DE   AltName: Full=G6P;
GN   Name=VI;
OS   Escherichia phage If1 (Bacteriophage If1).
OC   Viruses; Monodnaviria; Loebvirae; Hofneiviricota; Faserviricetes;
OC   Tubulavirales; Inoviridae; Infulavirus.
OX   NCBI_TaxID=10868;
OH   NCBI_TaxID=562; Escherichia coli.
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RA   Hill D.F., Hughes G., McNaughton J.C., Stockwell P.A., Petersen G.B.;
RT   "DNA sequence of the filamentous coliphage If1.";
RL   Submitted (OCT-1993) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Plays essential roles both in the entry of the viral genome
CC       into the bacterial host and in budding process. The formation of the
CC       G3P-G6P complex termed adsorption complex is essential for correct
CC       termination of filamentous phage assembly (By similarity).
CC       {ECO:0000250}.
CC   -!- SUBUNIT: Interacts with G3P; this interaction is required for proper
CC       integration of G3P and G6P into the virion. {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Virion {ECO:0000305}. Host membrane
CC       {ECO:0000305}; Multi-pass membrane protein {ECO:0000305}. Note=Prior to
CC       assembly, G6P is found associated with the bacterial host inner
CC       membrane. There are about five copies of G6P in the mature virion. They
CC       are located together with G3P at the head side of the filamentous
CC       virion (By similarity). {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the inovirus G6P protein family. {ECO:0000305}.
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DR   EMBL; U02303; AAC62156.1; -; Genomic_DNA.
DR   RefSeq; NP_047357.1; NC_001954.1.
DR   GeneID; 1261856; -.
DR   KEGG; vg:1261856; -.
DR   Proteomes; UP000001833; Genome.
DR   GO; GO:0033644; C:host cell membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0039667; P:viral entry into host cell via pilus retraction; IEA:UniProtKB-KW.
DR   InterPro; IPR035210; DUF5455.
DR   Pfam; PF17537; DUF5455; 1.
PE   3: Inferred from homology;
KW   Host membrane; Membrane; Reference proteome; Transmembrane;
KW   Transmembrane helix; Viral penetration into host cytoplasm;
KW   Viral penetration into host cytoplasm via pilus retraction; Virion;
KW   Virus entry into host cell.
FT   CHAIN           1..113
FT                   /note="Head virion protein G6P"
FT                   /id="PRO_0000098192"
FT   TRANSMEM        13..33
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        36..56
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        69..89
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   113 AA;  12106 MW;  9180D3F810273CB9 CRC64;
     MPVFLGLPVL ARFIGWLAGA LIAYVAKFFT LGIARIALAI SLFLGLIIGL NGLLVSYLSD
     LTSVLPPEIA SAVSYVVPAN AAPCLYAIFS LKAAVFIFDV KDRIIGYLDW NKS