ID   G_BPST1                 Reviewed;         103 AA.
AC   P03645;
DT   21-JUL-1986, integrated into UniProtKB/Swiss-Prot.
DT   21-JUL-1986, sequence version 1.
DT   25-MAY-2022, entry version 76.
DE   RecName: Full=Major spike protein;
DE   AltName: Full=G protein;
DE   AltName: Full=GPG;
DE   Flags: Fragment;
GN   Name=G;
OS   Escherichia phage St-1 (Bacteriophage St-1).
OC   Viruses; Monodnaviria; Sangervirae; Phixviricota; Malgrandaviricetes;
OC   Petitvirales; Microviridae; Bullavirinae; Alphatrevirus.
OX   NCBI_TaxID=10845;
OH   NCBI_TaxID=83333; Escherichia coli (strain K12).
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC RNA], AND PROTEIN SEQUENCE OF 81-103.
RX   PubMed=387790; DOI=10.1016/s0021-9258(19)86359-7;
RA   Sims J., Capon D., Dressler D.;
RT   "dnaG (primase)-dependent origins of DNA replication. Nucleotide sequences
RT   of the negative strand initiation sites of bacteriophages St-1, phi K, and
RT   alpha 3.";
RL   J. Biol. Chem. 254:12615-12628(1979).
CC   -!- FUNCTION: Major spike component. Involved in the attachment to the
CC       bacterial host. Involved in the determination of the phage host-range
CC       (By similarity). {ECO:0000250}.
CC   -!- SUBUNIT: The virion is composed of 60 copies each of the F, G, and J
CC       proteins, and 12 copies of the H protein. There are 12 spikes which are
CC       each composed of 5 G and one H proteins.
CC   -!- SUBCELLULAR LOCATION: Virion {ECO:0000305}.
CC   -!- SIMILARITY: Belongs to the microvirus G protein family. {ECO:0000305}.
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DR   EMBL; J02501; AAA32606.1; -; Genomic_RNA.
DR   PIR; A04253; ZGBPS1.
DR   GO; GO:0019028; C:viral capsid; IEA:UniProtKB-KW.
DR   GO; GO:0019048; P:modulation by virus of host process; IEA:InterPro.
DR   GO; GO:0046718; P:viral entry into host cell; IEA:UniProtKB-KW.
DR   GO; GO:0019062; P:virion attachment to host cell; IEA:UniProtKB-KW.
DR   Gene3D; 2.60.120.20; -; 1.
DR   InterPro; IPR016184; Capsid/spike_ssDNA_virus.
DR   InterPro; IPR003515; Spike_G.
DR   InterPro; IPR029053; Viral_coat.
DR   Pfam; PF02306; Phage_G; 1.
DR   SUPFAM; SSF88645; SSF88645; 1.
PE   1: Evidence at protein level;
KW   Capsid protein; Direct protein sequencing; Host-virus interaction;
KW   Viral attachment to host cell; Virion; Virus entry into host cell.
FT   CHAIN           <1..103
FT                   /note="Major spike protein"
FT                   /id="PRO_0000164897"
FT   NON_TER         1
SQ   SEQUENCE   103 AA;  11005 MW;  AC5D0BFF6616F6AC CRC64;
     VXLSFAGTSY PIVGIVRFES AFDQPTSIAG SQIEHYPIEM SVGSGGVCSA RDCATVDIHP
     RTFGNNVFVG VICSSAKWTS GRVLGTIATT QVIREYQVLQ PLK