ID   PORTL_BPTWO             Reviewed;         576 AA.
AC   Q4Z9G3;
DT   01-APR-2015, integrated into UniProtKB/Swiss-Prot.
DT   07-JUN-2005, sequence version 1.
DT   03-AUG-2022, entry version 33.
DE   RecName: Full=Probable portal protein;
OS   Staphylococcus phage Twort (strain DSM 17442 / HER 48) (Bacteriophage
OS   Twort).
OC   Viruses; Duplodnaviria; Heunggongvirae; Uroviricota; Caudoviricetes;
OC   Caudovirales; Herelleviridae; Twortvirinae; Twortvirus.
OX   NCBI_TaxID=1283338;
OH   NCBI_TaxID=55510; Staphylococcus virus Twort.
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=15788529; DOI=10.1073/pnas.0501140102;
RA   Kwan T., Liu J., DuBow M., Gros P., Pelletier J.;
RT   "The complete genomes and proteomes of 27 Staphylococcus aureus
RT   bacteriophages.";
RL   Proc. Natl. Acad. Sci. U.S.A. 102:5174-5179(2005).
CC   -!- FUNCTION: Forms the portal vertex of the capsid. This portal plays
CC       critical roles in head assembly, genome packaging, neck/tail
CC       attachment, and genome ejection. The portal protein multimerizes as a
CC       single ring-shaped homododecamer arranged around a central channel.
CC       Binds to the terminase subunits to form the packaging machine.
CC       {ECO:0000250|UniProtKB:P25480}.
CC   -!- SUBUNIT: Homododecamer. {ECO:0000250|UniProtKB:P25480}.
CC   -!- SUBCELLULAR LOCATION: Virion {ECO:0000250|UniProtKB:P25480}.
CC   -!- SIMILARITY: Belongs to the phage portal family. {ECO:0000305}.
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DR   EMBL; AY954970; AAX92308.1; -; Genomic_DNA.
DR   RefSeq; YP_238542.1; NC_007021.1.
DR   GeneID; 5130361; -.
DR   KEGG; vg:5130361; -.
DR   Proteomes; UP000001466; Genome.
DR   GO; GO:0019028; C:viral capsid; IEA:UniProtKB-KW.
DR   GO; GO:0003677; F:DNA binding; IEA:UniProtKB-KW.
DR   GO; GO:0099000; P:viral genome ejection through host cell envelope, contractile tail mechanism; IEA:UniProtKB-KW.
DR   InterPro; IPR006944; Phage/GTA_portal.
DR   Pfam; PF04860; Phage_portal; 1.
PE   3: Inferred from homology;
KW   Capsid protein; DNA-binding; Reference proteome; Viral capsid assembly;
KW   Viral contractile tail ejection system;
KW   Viral genome ejection through host cell envelope; Viral genome packaging;
KW   Viral penetration into host cytoplasm; Viral release from host cell;
KW   Virion; Virus entry into host cell.
FT   CHAIN           1..576
FT                   /note="Probable portal protein"
FT                   /id="PRO_0000432538"
FT   REGION          374..399
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   REGION          506..576
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   576 AA;  65673 MW;  68AB09516975CE7B CRC64;
     MVTRLADIFK RLRLGRDYED IIDTVPIDDG LQANIRNIEE KSKELNKSLY GKQQAYAEPF
     LEVMDTNPEF RTKRSYMKNS DNLHDVLKQF GNNPILNAII LTRSNQVAMY CQPSRYNERG
     LGFEVRMRDL DAEPGKKEKE EIKRIENFIL NTGRDKDIDR DSFQSFCRKI VRDTYTYDQV
     NFEKVFNKKN ATTMDKFIAV DPSTIFYATD KNGKIIKGGK RFVQVINKKV VASFTSREMA
     MGIRNPRTEL SSSGYGLSEV EIAMKQFIAY NNTETFNDRF FSHGGTTRGI LQIKSEQQQS
     QRALENFKRE WKSSFSGING SWQVPVVMAD DIKFVNMTPT ANDMQFEKWL TYLINIISAL
     YGIDPAEIGF PNRGGATGGK GGNTLNEADP GKKQQQSQNK GLQPLLRFIE DLINTHIISE
     YSDKYVFQFV GGDTKSELDK IKILQEEVKT YKTVNEARKE KGLKPIEGGD VLLDGSFIQS
     MSLNTQKEQY EDTKQKERFD MIQQFLNSPD DEEPQQESTE DKVDGRESND PTKIDSPVGT
     DGQLKDQDNV KSQEGSNKGQ GTKGKGNEKP SDFKNN