ID   DIT9_BPB03              Reviewed;         598 AA.
AC   Q37890;
DT   15-DEC-1998, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1996, sequence version 1.
DT   29-SEP-2021, entry version 58.
DE   RecName: Full=Tail knob protein gp9 {ECO:0000250|UniProtKB:P04331};
DE   AltName: Full=Distal tube protein {ECO:0000250|UniProtKB:P04331};
DE   AltName: Full=Gene product 9 {ECO:0000250|UniProtKB:P04331};
DE            Short=gp9 {ECO:0000250|UniProtKB:P04331};
DE   AltName: Full=Protein p9 {ECO:0000250|UniProtKB:P04331};
GN   Name=9;
OS   Bacillus phage B103 (Bacteriophage B103).
OC   Viruses; Duplodnaviria; Heunggongvirae; Uroviricota; Caudoviricetes;
OC   Caudovirales; Salasmaviridae; Picovirinae; Beecentumtrevirus.
OX   NCBI_TaxID=10778;
OH   NCBI_TaxID=1423; Bacillus subtilis.
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX   PubMed=9358052; DOI=10.1016/s0378-1119(97)00363-6;
RA   Pecenkova T., Benes V., Paces J., Vlcek C., Paces V.;
RT   "Bacteriophage B103: complete DNA sequence of its genome and relationship
RT   to other Bacillus phages.";
RL   Gene 199:157-163(1997).
CC   -!- FUNCTION: Distal (knob) tail protein that plugs the end of the tube
CC       before DNA ejection and forms a channel perforating the host membrane
CC       during ejection. {ECO:0000250|UniProtKB:P04331}.
CC   -!- SUBUNIT: Homohexamer; forms a hexameric tube structure with six
CC       flexible hydrophobic loops. {ECO:0000250|UniProtKB:P04331}.
CC   -!- SUBCELLULAR LOCATION: Virion {ECO:0000250|UniProtKB:P04331}.
CC       Note=Present in 6 copies in the virion. Located at the tip of the tail
CC       and constitutes most of the tail knob. {ECO:0000250|UniProtKB:P04331}.
CC   -!- SIMILARITY: Belongs to the picovirinae distal tube protein family.
CC       {ECO:0000305}.
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DR   EMBL; X99260; CAA67657.1; -; Genomic_DNA.
DR   RefSeq; NP_690643.1; NC_004165.1.
DR   SMR; Q37890; -.
DR   PRIDE; Q37890; -.
DR   GeneID; 955362; -.
DR   KEGG; vg:955362; -.
DR   Proteomes; UP000000971; Genome.
DR   GO; GO:0098026; C:virus tail, tube; IEA:UniProtKB-KW.
DR   GO; GO:0044694; P:pore-mediated entry of viral genome into host cell; IEA:UniProtKB-KW.
DR   GO; GO:0099002; P:viral genome ejection through host cell envelope, short tail mechanism; IEA:UniProtKB-KW.
DR   InterPro; IPR031772; Caud_tail_N.
DR   Pfam; PF16838; Caud_tail_N; 1.
PE   3: Inferred from homology;
KW   Late protein; Pore-mediated penetration of viral genome into host cell;
KW   Viral genome ejection through host cell envelope;
KW   Viral penetration into host cytoplasm; Viral short tail ejection system;
KW   Viral tail protein; Viral tail tube protein; Virion;
KW   Virus entry into host cell.
FT   CHAIN           1..598
FT                   /note="Tail knob protein gp9"
FT                   /id="PRO_0000106581"
SQ   SEQUENCE   598 AA;  67438 MW;  A13DBB185027E5F0 CRC64;
     MAYVPLSGTD VRIFSNVPFS NDYKSTRWFT NADAQYSYFN AKPRVHVINE CNFVGLKEGT
     PHIRVNKRID DLYNACYMIF RNTQYSNKWF YCFVTRLEYV NSGVTNLYFE IDVIQTWMFD
     FKFQPSYIVR EHQEMWDANN EPLTNTIDEG LNYGTEYDVV AVEQYKPYGD LMFMVCISKS
     KMHATAGETF KAGEIAANIN GAPQPLSYYV HPFYEDGSSP KVTIGSNEVQ VSKPTDFLKN
     MFTQEHAVNN IVSLYVTDYI GLNIHYDESA KTMSLRDTMF EHAQIADDKH PNVNTIYLKE
     VKEYEEKTID TGYKFASFAN NEQSKLLMYP YCVTTITDFK GNQIDIKNEY VNGSNLKIQV
     RGSLGVSNKV TYSVQDYNAD TTLSGDQNLT ASCNTSLINN NPNDVAIIND YLSAYLQGNK
     NSLENQKDSI LFNGVMSMLG NGIGAVGSAA TGSAVGVASS ATGMVSSAGN AVLQIQGMQA
     KQADIANTPP QLVKMGGNTA YDYGNGYRGV YVIKKQIKEE YRNILSDFSR KYGYKTNLVK
     MPNLRTRESY NYVQTKDCNI IGNLNNEDLQ KIRTIFDSGI TLWHADPVGD YTLNNEVR