ID   GP16_BPLSK              Reviewed;         375 AA.
AC   O21884;
DT   02-NOV-2016, integrated into UniProtKB/Swiss-Prot.
DT   01-JAN-1998, sequence version 1.
DT   29-SEP-2021, entry version 45.
DE   RecName: Full=Baseplate protein gp16 {ECO:0000305};
DE   AltName: Full=Exolysin {ECO:0000305};
DE   AltName: Full=Gene product 16 {ECO:0000305};
DE            Short=Gp16 {ECO:0000305};
DE   AltName: Full=Tail lysozyme-like {ECO:0000250|UniProtKB:D3WAD4};
DE   AltName: Full=Tail-associated lysine-like protein;
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: Forms a dome thereby closing the central channel at the end
CC       of the baseplate. Changes its conformation upon activation by calcium
CC       allowing the channel to open at the bottom of the baseplate for DNA
CC       ejection. {ECO:0000250|UniProtKB:D3WAD4}.
CC   -!- SUBUNIT: Homotrimer. {ECO:0000250|UniProtKB:D3WAD4}.
CC   -!- SUBCELLULAR LOCATION: Virion {ECO:0000250|UniProtKB:D3WAD4}. Note=Part
CC       of the baseplate. {ECO:0000250|UniProtKB:D3WAD4}.
CC   -!- SIMILARITY: Belongs to the skunalikevirus baseplate protein gp16
CC       family. {ECO:0000305}.
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DR   EMBL; AF011378; AAB70055.1; -; Genomic_DNA.
DR   RefSeq; NP_044962.1; NC_001835.1.
DR   SMR; O21884; -.
DR   GeneID; 1261276; -.
DR   KEGG; vg:1261276; -.
DR   Proteomes; UP000000839; Genome.
DR   GO; GO:0098025; C:virus tail, baseplate; IEA:UniProtKB-KW.
DR   GO; GO:0099001; P:viral genome ejection through host cell envelope, long flexible tail mechanism; IEA:UniProtKB-KW.
DR   Gene3D; 2.30.300.20; -; 1.
DR   Gene3D; 3.55.50.50; -; 1.
DR   InterPro; IPR031861; Caudo_ORF16.
DR   InterPro; IPR043075; Gp16_dom1_2.
DR   InterPro; IPR043073; Gp16_domD4.
DR   Pfam; PF16792; Caudo_bapla16; 1.
PE   3: Inferred from homology;
KW   Reference proteome; Viral baseplate protein;
KW   Viral genome ejection through host cell envelope;
KW   Viral long flexible tail ejection system;
KW   Viral penetration into host cytoplasm; Viral tail protein; Virion;
KW   Virus entry into host cell.
FT   CHAIN           1..375
FT                   /note="Baseplate protein gp16"
FT                   /id="PRO_0000438266"
SQ   SEQUENCE   375 AA;  42738 MW;  5F9616E02A04D34E CRC64;
     MLEANVYDNF NPNYYNVSDF SMPNGKKEKR GLPIPKARCQ VINYELWETG YLYTSSATLT
     VSVEVGDIVQ ILFPEVVPIE EALGKKKKLN LDMVYLVTDV DESNKATLKN YFWAMIESLD
     VPNAITKTTN FAIIDYLIDP SKNNLMSYGY FFNSSIFAGK ATINRKAETS SAHDVAKRIF
     SKVQFQPTTT IQHAPSETDP RNLLFINFAS RNWNRKRITT RVDIKQSVTM DTETIVERSA
     YNFAVVFVKN KATDDYTDPP KMYIAKNNGD VIDYSTYHGD GTDLPDVRTA KTLFYDRDDH
     GNPPALSTIK VEISPSTIVT RLIFNQNELL PLYVNDLVDI WYEGKLYSGY IADRVKTEFN
     DRLIFVESGD KPNVI