ID   PORTL_BPAPS             Reviewed;         720 AA.
AC   Q9T1S9;
DT   01-DEC-2000, integrated into UniProtKB/Swiss-Prot.
DT   01-MAY-2000, sequence version 1.
DT   25-MAY-2022, entry version 51.
DE   RecName: Full=Portal protein;
DE   AltName: Full=Gene product 19 {ECO:0000305};
DE            Short=Gp19;
DE   AltName: Full=Head-to-tail connector;
GN   Name=19;
OS   Acyrthosiphon pisum secondary endosymbiont phage 1 (Bacteriophage APSE-1).
OC   Viruses; Duplodnaviria; Heunggongvirae; Uroviricota; Caudoviricetes;
OC   Caudovirales; Podoviridae; Sendosyvirus.
OX   NCBI_TaxID=2682836;
OH   NCBI_TaxID=562; Escherichia coli.
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX   PubMed=10489345; DOI=10.1006/viro.1999.9902;
RA   van der Wilk F., Dullemans A.M., Verbeek M., van den Heuvel J.F.J.M.;
RT   "Isolation and characterization of APSE-1, a bacteriophage infecting the
RT   secondary endosymbiont of acyrthosiphon pisum.";
RL   Virology 262:104-113(1999).
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. Procapsid assembly may initiate with a
CC       nucleation complex composed of portal and scaffolding proteins (By
CC       similarity). The portal protein multimerizes as a single ring-shaped
CC       homododecamer arranged around a central channel.
CC       {ECO:0000250|UniProtKB:P26744}.
CC   -!- SUBUNIT: Homododecamer. {ECO:0000250|UniProtKB:P26744}.
CC   -!- SUBCELLULAR LOCATION: Virion {ECO:0000250|UniProtKB:P26744}.
CC   -!- SIMILARITY: Belongs to the p22likevirus portal protein family.
CC       {ECO:0000305}.
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DR   EMBL; AF157835; AAF03962.1; -; Genomic_DNA.
DR   RefSeq; NP_050980.1; NC_000935.1.
DR   SMR; Q9T1S9; -.
DR   GeneID; 1262313; -.
DR   KEGG; vg:1262313; -.
DR   Proteomes; UP000000853; Genome.
DR   GO; GO:0019028; C:viral capsid; IEA:UniProtKB-KW.
DR   GO; GO:0099002; P:viral genome ejection through host cell envelope, short tail mechanism; IEA:UniProtKB-KW.
DR   InterPro; IPR032427; P22_portal.
DR   Pfam; PF16510; P22_portal; 1.
PE   3: Inferred from homology;
KW   Capsid protein; Late protein; Reference proteome; Viral capsid assembly;
KW   Viral genome ejection through host cell envelope; Viral genome packaging;
KW   Viral penetration into host cytoplasm; Viral release from host cell;
KW   Viral short tail ejection system; Virion; Virus entry into host cell.
FT   CHAIN           1..720
FT                   /note="Portal protein"
FT                   /id="PRO_0000077748"
SQ   SEQUENCE   720 AA;  80934 MW;  F6178E7B3B02AD56 CRC64;
     MAETLQKRHE QIMRKFDRAH SPQEAVREKC LEATRFARVP GGQWEGATAA GSELGKHFEK
     YPKFEINKIS TELNRIISEY RHNRITVKFR PGDKTASEAL ANKLNGLFRA DYEETDGGEA
     CDNAFDDGST GGFGCFRLTT NLVNALDPMD ERQRICLEPI YDPARSVWFD PDAKKYDKSD
     AEWAFCMYSL SAEKYKAEYN KDPATLMSGI ERSWDYDWYD VDVVYIAKYY EVKKESVDVV
     SFQNPLTSET VTYDSDQLEL VEDELADIGF IEAARRTIKR RRVYVSVVDG EGFLEKAQRI
     PGEHIPLIPV YGKRWFIDDI ERVEGHIAKA MDAQRLYNLQ VSMLADSATQ DTGSIPIVGK
     SQIKTLEKYW ANRNKNRPAF LPLNEIVDKQ GNIIAPPTPV GYTQPQPLNQ AMAALLQQTG
     ADIQEVTGSS QAMQPMPSNI AKETVNHLMH RSDMSSFIYL DNMAKSLKRA GEVWLSMARE
     VYGSDRQVRI VNADGTDDIA LMSVVINDNQ TGQVVAMNDL SSGRYDVTVD VGPSYTARRD
     ATVSVLTNLL AGMLPQDPMR QVLQGIILDN MEGEGLDEFK EYNRKQLLTQ GVVKPRNTEE
     EQMVAQMIQQ AQQPNAELVA AQGVLMQGQA EVQKAKNEEL AIQVKAFQAQ TEARVAEAKM
     VQILASADSA KRAEIREALK MLHQFQKEQG DASRADAELI LKATDTQHKQ NRDAAKNHSI