ID   HCP2_BPLSK              Reviewed;          56 AA.
AC   O21877;
DT   02-NOV-2016, integrated into UniProtKB/Swiss-Prot.
DT   01-JAN-1998, sequence version 1.
DT   23-FEB-2022, entry version 44.
DE   RecName: Full=Probable head completion protein 2 {ECO:0000250|UniProtKB:D3WAC8};
DE   AltName: Full=Connector protein gp9;
DE   AltName: Full=Gene product 9 {ECO:0000305};
DE            Short=gp9 {ECO:0000305};
DE   AltName: Full=Putative stopper protein gp9 {ECO:0000250|UniProtKB:D3WAC8};
DE   AltName: Full=Stopper protein gp9;
OS   Lactococcus phage SK1 (Lactococcus lactis bacteriophage SK1).
OC   Viruses; Duplodnaviria; Heunggongvirae; Uroviricota; Caudoviricetes;
OC   Caudovirales; Siphoviridae; Skunavirus.
OX   NCBI_TaxID=31532;
OH   NCBI_TaxID=1358; Lactococcus lactis.
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX   PubMed=9383189; DOI=10.1046/j.1365-2958.1997.5491926.x;
RA   Chandry P.S., Moore S.C., Boyce J.D., Davidson B.E., Hillier A.J.;
RT   "Analysis of the DNA sequence, gene expression, origin of replication and
RT   modular structure of the Lactococcus lactis lytic bacteriophage sk1.";
RL   Mol. Microbiol. 26:49-64(1997).
CC   -!- FUNCTION: Probably functions as a stopper that is part of the head-tail
CC       connector and that locks the viral DNA in the capsid. During assembly,
CC       functions as a docking platform which the preassembled tail can bind
CC       to. Plays a role in morphogenesis of the virion capsid after genome
CC       packaging. {ECO:0000250|UniProtKB:D3WAC8}.
CC   -!- SUBCELLULAR LOCATION: Virion {ECO:0000250|UniProtKB:D3WAC8}. Note=Part
CC       of the connector between the portal and the tail.
CC       {ECO:0000250|UniProtKB:D3WAC8}.
CC   -!- SIMILARITY: Belongs to the skunalikevirus head completion protein 2
CC       family. {ECO:0000305}.
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DR   EMBL; AF011378; AAB70048.1; -; Genomic_DNA.
DR   RefSeq; NP_044955.1; NC_001835.1.
DR   SMR; O21877; -.
DR   GeneID; 1261275; -.
DR   KEGG; vg:1261275; -.
DR   Proteomes; UP000000839; Genome.
DR   GO; GO:0099001; P:viral genome ejection through host cell envelope, long flexible tail mechanism; IEA:UniProtKB-KW.
PE   3: Inferred from homology;
KW   Reference proteome; Viral capsid assembly;
KW   Viral genome ejection through host cell envelope;
KW   Viral long flexible tail ejection system;
KW   Viral penetration into host cytoplasm; Viral release from host cell;
KW   Virion; Virus entry into host cell.
FT   CHAIN           1..56
FT                   /note="Probable head completion protein 2"
FT                   /id="PRO_0000438261"
SQ   SEQUENCE   56 AA;  6550 MW;  1455CA99F6D87CB8 CRC64;
     MEFDSYIDWY NNLLTMPLND VILGVKDTIE DKTVYLSLSD SKVIKMDNTS FVMGYY