ID   IPI3_BPT4               Reviewed;         193 AA.
AC   P13302;
DT   01-JAN-1990, integrated into UniProtKB/Swiss-Prot.
DT   01-JAN-1990, sequence version 1.
DT   29-SEP-2021, entry version 67.
DE   RecName: Full=Internal protein III;
DE            Short=IpIII;
DE   Flags: Precursor;
GN   Name=ipi3;
OS   Enterobacteria phage T4 (Bacteriophage T4).
OC   Viruses; Duplodnaviria; Heunggongvirae; Uroviricota; Caudoviricetes;
OC   Caudovirales; Myoviridae; Tevenvirinae; Tequatrovirus.
OX   NCBI_TaxID=10665;
OH   NCBI_TaxID=562; Escherichia coli.
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=3024113; DOI=10.1093/nar/14.21.8637;
RA   Valerie K., Stevens J., Lynch M., Henderson E.E., de Riel J.K.;
RT   "Nucleotide sequence and analysis of the 58.3 to 65.5-kb early region of
RT   bacteriophage T4.";
RL   Nucleic Acids Res. 14:8637-8654(1986).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX   PubMed=12626685; DOI=10.1128/mmbr.67.1.86-156.2003;
RA   Miller E.S., Kutter E., Mosig G., Arisaka F., Kunisawa T., Ruger W.;
RT   "Bacteriophage T4 genome.";
RL   Microbiol. Mol. Biol. Rev. 67:86-156(2003).
RN   [3]
RP   PRELIMINARY PROTEIN SEQUENCE OF 1-20.
RX   PubMed=1069310; DOI=10.1073/pnas.73.11.4205;
RA   Isobe T., Black L.W., Tsugita A.;
RT   "Protein cleavage during virus assembly: a novel specificity of assembly
RT   dependent cleavage in bacteriophage T4.";
RL   Proc. Natl. Acad. Sci. U.S.A. 73:4205-4209(1976).
CC   -!- FUNCTION: Internal protein III is one of four proteins in a complex
CC       that functions in bacteriophage head maturation.
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DR   EMBL; X04567; CAA28213.1; -; Genomic_DNA.
DR   EMBL; AF158101; AAD42587.1; -; Genomic_DNA.
DR   PIR; A36780; HIBPA4.
DR   RefSeq; NP_049735.1; NC_000866.4.
DR   GeneID; 1258595; -.
DR   KEGG; vg:1258595; -.
DR   Proteomes; UP000009087; Genome.
PE   1: Evidence at protein level;
KW   Direct protein sequencing; Reference proteome.
FT   PROPEP          1..10
FT                   /id="PRO_0000003342"
FT   CHAIN           11..193
FT                   /note="Internal protein III"
FT                   /id="PRO_0000003343"
FT   SITE            10..11
FT                   /note="Cleavage; by prohead core protease GP21"
SQ   SEQUENCE   193 AA;  21687 MW;  FFF0D90C6536E262 CRC64;
     MKTYQEFIAE ASVVKAKGIN KDEWTYRSGN GFDPKTAPIE RYLATKASDF KAFAWEGLRW
     RTDLNIEVDG LKFAHIEDVV ASNLDSEFVK ADADLRRWNL KLFSKQKGPK FVPKAGKWVI
     DNKLAKAVNF AGLEFAKHKS SWKGLDAMAF RKEFADVMTK GGFKAEIDTS KGKFKDANIQ
     YAYAVANAAR GNS