ID   BPX_BPP2                Reviewed;          67 AA.
AC   P51772;
DT   01-OCT-1996, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-1996, sequence version 1.
DT   29-SEP-2021, entry version 74.
DE   RecName: Full=Baseplate protein X {ECO:0000305};
DE   AltName: Full=Gene X protein {ECO:0000305};
DE            Short=GpX;
GN   Name=X;
OS   Escherichia phage P2 (Bacteriophage P2).
OC   Viruses; Duplodnaviria; Heunggongvirae; Uroviricota; Caudoviricetes;
OC   Caudovirales; Myoviridae; Peduovirinae; Peduovirus.
OX   NCBI_TaxID=10679;
OH   NCBI_TaxID=543; Enterobacteriaceae.
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=8051010; DOI=10.1128/jb.176.16.4974-4984.1994;
RA   Ziermann R., Bartlett B., Calendar R., Christie G.E.;
RT   "Functions involved in bacteriophage P2-induced host cell lysis and
RT   identification of a new tail gene.";
RL   J. Bacteriol. 176:4974-4984(1994).
RN   [2] {ECO:0007744|PDB:2LTF}
RP   STRUCTURE BY NMR, FUNCTION, AND SUBCELLULAR LOCATION.
RX   PubMed=24097944; DOI=10.1128/jb.00805-13;
RA   Maxwell K.L., Fatehi Hassanabad M., Chang T., Pirani N., Bona D.,
RA   Edwards A.M., Davidson A.R.;
RT   "Structural and functional studies of gpX of Escherichia coli phage P2
RT   reveal a widespread role for LysM domains in the baseplates of contractile-
RT   tailed phages.";
RL   J. Bacteriol. 195:5461-5468(2013).
CC   -!- FUNCTION: Might be involved in the peptidoglycan digestion during virus
CC       entry into the host cell. {ECO:0000269|PubMed:24097944}.
CC   -!- SUBCELLULAR LOCATION: Virion {ECO:0000305}. Note=Localizes to the
CC       baseplate at the junction of the tail tube.
CC       {ECO:0000269|PubMed:24097944}.
CC   -!- INDUCTION: Expressed in the late phase of the viral replicative cycle.
CC       {ECO:0000305}.
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DR   EMBL; AF063097; AAD03274.1; -; Genomic_DNA.
DR   PIR; B55855; B55855.
DR   RefSeq; NP_046763.1; NC_001895.1.
DR   PDB; 2LTF; NMR; -; A=1-67.
DR   PDBsum; 2LTF; -.
DR   BMRB; P51772; -.
DR   SMR; P51772; -.
DR   GeneID; 1261545; -.
DR   KEGG; vg:1261545; -.
DR   Proteomes; UP000009092; Genome.
DR   GO; GO:0098025; C:virus tail, baseplate; IDA:CACAO.
DR   InterPro; IPR008861; GpX-like.
DR   Pfam; PF05489; Phage_tail_X; 1.
PE   1: Evidence at protein level;
KW   3D-structure; Late protein; Reference proteome; Viral baseplate protein;
KW   Viral tail protein; Virion.
FT   CHAIN           1..67
FT                   /note="Baseplate protein X"
FT                   /id="PRO_0000165265"
FT   STRAND          2..5
FT                   /evidence="ECO:0007829|PDB:2LTF"
FT   HELIX           11..17
FT                   /evidence="ECO:0007829|PDB:2LTF"
FT   TURN            23..25
FT                   /evidence="ECO:0007829|PDB:2LTF"
FT   HELIX           26..32
FT                   /evidence="ECO:0007829|PDB:2LTF"
FT   TURN            34..39
FT                   /evidence="ECO:0007829|PDB:2LTF"
FT   STRAND          47..50
FT                   /evidence="ECO:0007829|PDB:2LTF"
SQ   SEQUENCE   67 AA;  7083 MW;  0FF573070A44AF21 CRC64;
     MKTFALQGDT LDAICVRYYG RTEGVVETVL AANPGLAELG AVLPHGTAVE LPDVQTAPVA
     ETVNLWE