ID   PORTL_BPHA1             Reviewed;         518 AA.
AC   B0ZSF2;
DT   01-APR-2015, integrated into UniProtKB/Swiss-Prot.
DT   08-APR-2008, sequence version 1.
DT   02-JUN-2021, entry version 27.
DE   RecName: Full=Probable portal protein;
GN   ORFNames=HAPgp04 {ECO:0000312|EMBL:ABY90372.1};
OS   Halomonas phage phiHAP-1 (isolate -/Gulf of Mexico/-/2001) (Bacteriophage
OS   phiHAP-1).
OC   Viruses; Duplodnaviria; Heunggongvirae; Uroviricota; Caudoviricetes;
OC   Caudovirales; Myoviridae; Hapunavirus.
OX   NCBI_TaxID=1283337;
OH   NCBI_TaxID=77097; Halomonas aquamarina.
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=18448537; DOI=10.1128/jvi.00140-08;
RA   Mobberley J.M., Authement R.N., Segall A.M., Paul J.H.;
RT   "The temperate marine phage PhiHAP-1 of Halomonas aquamarina possesses a
RT   linear plasmid-like prophage genome.";
RL   J. Virol. 82:6618-6630(2008).
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:P03710}.
CC   -!- SUBUNIT: Homododecamer. Interacts with the terminase complex composed
CC       of two small and one large terminase subunits.
CC       {ECO:0000250|UniProtKB:P03710}.
CC   -!- SUBCELLULAR LOCATION: Virion {ECO:0000250|UniProtKB:P03710}.
CC   -!- SIMILARITY: Belongs to the siphoviridae portal protein family.
CC       {ECO:0000305}.
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DR   EMBL; EU399241; ABY90372.1; -; Genomic_DNA.
DR   RefSeq; YP_001686740.1; NC_010342.1.
DR   GeneID; 5912339; -.
DR   KEGG; vg:5912339; -.
DR   Proteomes; UP000001179; Genome.
DR   GO; GO:0019028; C:viral capsid; IEA:UniProtKB-KW.
DR   GO; GO:0003677; F:DNA binding; IEA:UniProtKB-KW.
DR   GO; GO:0005198; F:structural molecule activity; IEA:InterPro.
DR   GO; GO:0099000; P:viral genome ejection through host cell envelope, contractile tail mechanism; IEA:UniProtKB-KW.
DR   GO; GO:0019068; P:virion assembly; IEA:InterPro.
DR   InterPro; IPR006429; Phage_lambda_portal.
DR   Pfam; PF05136; Phage_portal_2; 1.
DR   TIGRFAMs; TIGR01539; portal_lambda; 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..518
FT                   /note="Probable portal protein"
FT                   /id="PRO_0000432541"
FT   REGION          492..518
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        503..518
FT                   /note="Acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   518 AA;  59388 MW;  18B70B4C38DBAFBE CRC64;
     MGLLKRAARA WKLAGQADSP PAQPARKEPT LTRTFKMARQ TRLNNSWTGR SNAGDADHVI
     YKDHETLRQR AREQSINSGY AKRFYRLLRQ NVIGPHGITM RSKALKADGY ADDDMRRVIE
     QEFKKWSKRG NCDVTGRYSF VTFMWLWIDT LARDGEVMVR ILRNWPNRWG FALQIIESDL
     LDTTLNTWLS NGNRVRMGVE IDEWEKPIAY WLKRSHPGDN FERPAEQEYQ RIPADELRLT
     FDPWRPHQSR GFTWTHAGAN DLHHVEEYAG AELIAAEQGA KLTGFYEQDA EWVDPPGDED
     SDDADQGVII EEIEAGSARL LPYGVTFKPY DNKHPSTNFA PFTKAAVRRI AGAFGPSYNR
     LAHDLEGVSF SSLRSGEIDE RDFYKCIQQF AISELLEWVG EVWMECSMLK GVLKIPPRAW
     DRLTPIEWLP RGWDWVDPKK DSDAAKTGIE TLTDSVSDIM RRKGRDPDDV YNQISEDIRR
     FKRLGIPNPY GKALQANGVT HVEPDEEDDD EPNATGTD