ID   A1_BPSP                 Reviewed;         331 AA.
AC   P09677;
DT   01-JUL-1989, integrated into UniProtKB/Swiss-Prot.
DT   01-JUL-1989, sequence version 1.
DT   03-AUG-2022, entry version 73.
DE   RecName: Full=Minor capsid protein A1;
OS   Enterobacteria phage SP (Bacteriophage SP).
OC   Viruses; Riboviria; Orthornavirae; Lenarviricota; Leviviricetes;
OC   Levivirales; Leviviridae; Allolevivirus.
OX   NCBI_TaxID=12027;
OH   NCBI_TaxID=562; Escherichia coli.
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RX   PubMed=3399390; DOI=10.1093/nar/16.13.6205;
RA   Hirashima A., Hirose T., Inayama S., Inokuchi Y., Jacobson A.B.;
RT   "Analysis of the complete nucleotide sequence of the group IV RNA coliphage
RT   SP.";
RL   Nucleic Acids Res. 16:6205-6221(1988).
CC   -!- FUNCTION: Minor capsid protein. {ECO:0000250|UniProtKB:Q8LTE1}.
CC   -!- SUBCELLULAR LOCATION: Virion {ECO:0000250|UniProtKB:Q8LTE1}.
CC       Note=Present in 3-10 copies per virion. The readthrough extensions are
CC       probably located on the exterior of the capsid.
CC       {ECO:0000250|UniProtKB:Q8LTE1}.
CC   -!- MISCELLANEOUS: This protein is translated as a fusion protein by
CC       episodic readthrough of the termination codon at the end of the capsid
CC       protein. Readthrough of the terminator codon occurs between the codons
CC       for Tyr-132 and Trp-133, thereby producing the readthrough extension.
CC       {ECO:0000250|UniProtKB:Q8LTE1}.
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DR   EMBL; X07489; CAB37299.1; -; mRNA.
DR   PIR; S01964; S01964.
DR   SMR; P09677; -.
DR   Proteomes; UP000000728; Genome.
DR   GO; GO:0019028; C:viral capsid; IEA:UniProtKB-KW.
DR   GO; GO:0005198; F:structural molecule activity; IEA:InterPro.
DR   Gene3D; 3.30.380.10; -; 1.
DR   InterPro; IPR002703; Levivir_coat.
DR   InterPro; IPR015954; Phage_RNA-type_capsid.
DR   InterPro; IPR031819; Read-through_dom.
DR   Pfam; PF01819; Levi_coat; 1.
DR   Pfam; PF16814; Read-through; 1.
DR   SUPFAM; SSF55405; SSF55405; 1.
PE   2: Evidence at transcript level;
KW   Capsid protein; Reference proteome; RNA suppression of termination; Virion.
FT   CHAIN           1..331
FT                   /note="Minor capsid protein A1"
FT                   /id="PRO_0000003313"
SQ   SEQUENCE   331 AA;  36204 MW;  4A6642E4B52C6582 CRC64;
     MAKLNQVTLS KIGKNGDQTL TLTPRGVNPT NGVASLSEAG AVPALEKRVT VSVAQPSRNR
     KNFKVQIKLQ NPTACTRDAC DPSVTRSAFA DVTLSFTSYS TDEERALIRT ELAALLADPL
     IVDAIDNLNP AYWAALLVAS SGGGDNPSDP DVPVVPDVKP PDGTGRYKCP FACYRLGSIY
     EVGKEGSPDI YERGDEVSVT FDYALEDFLG NTNWRNWDQR LSDYDIANRR RCRGNGYIDL
     DATAMQSDDF VLSGRYGVRK VKFPGAFGSI KYLLNIQGDA WLDLSEVTAY RSYGMVIGFW
     TDSKSPQLPT DFTQFNSANC PVQTVIIIPS L