ID   IF3C_PORPU              Reviewed;         182 AA.
AC   P51231;
DT   01-OCT-1996, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-1996, sequence version 1.
DT   25-MAY-2022, entry version 77.
DE   RecName: Full=Translation initiation factor IF-3, chloroplastic {ECO:0000255|HAMAP-Rule:MF_00080};
GN   Name=infC {ECO:0000255|HAMAP-Rule:MF_00080};
OS   Porphyra purpurea (Red seaweed) (Ulva purpurea).
OG   Plastid; Chloroplast.
OC   Eukaryota; Rhodophyta; Bangiophyceae; Bangiales; Bangiaceae; Porphyra.
OX   NCBI_TaxID=2787;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Avonport;
RA   Reith M.E., Munholland J.;
RT   "Complete nucleotide sequence of the Porphyra purpurea chloroplast
RT   genome.";
RL   Plant Mol. Biol. Rep. 13:333-335(1995).
CC   -!- FUNCTION: IF-3 binds to the 30S ribosomal subunit and shifts the
CC       equilibrum between 70S ribosomes and their 50S and 30S subunits in
CC       favor of the free subunits, thus enhancing the availability of 30S
CC       subunits on which protein synthesis initiation begins.
CC       {ECO:0000255|HAMAP-Rule:MF_00080}.
CC   -!- SUBUNIT: Monomer. {ECO:0000255|HAMAP-Rule:MF_00080}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast.
CC   -!- SIMILARITY: Belongs to the IF-3 family. {ECO:0000255|HAMAP-
CC       Rule:MF_00080}.
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DR   EMBL; U38804; AAC08117.1; -; Genomic_DNA.
DR   PIR; S73152; S73152.
DR   RefSeq; NP_053841.1; NC_000925.1.
DR   AlphaFoldDB; P51231; -.
DR   SMR; P51231; -.
DR   GeneID; 809859; -.
DR   GO; GO:0009507; C:chloroplast; IEA:UniProtKB-SubCell.
DR   GO; GO:0003743; F:translation initiation factor activity; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.10.20.80; -; 1.
DR   Gene3D; 3.30.110.10; -; 1.
DR   HAMAP; MF_00080; IF_3; 1.
DR   InterPro; IPR036788; T_IF-3_C_sf.
DR   InterPro; IPR036787; T_IF-3_N_sf.
DR   InterPro; IPR019813; Translation_initiation_fac3_CS.
DR   InterPro; IPR001288; Translation_initiation_fac_3.
DR   InterPro; IPR019815; Translation_initiation_fac_3_C.
DR   InterPro; IPR019814; Translation_initiation_fac_3_N.
DR   PANTHER; PTHR10938; PTHR10938; 1.
DR   Pfam; PF00707; IF3_C; 1.
DR   Pfam; PF05198; IF3_N; 1.
DR   SUPFAM; SSF54364; SSF54364; 1.
DR   SUPFAM; SSF55200; SSF55200; 1.
DR   TIGRFAMs; TIGR00168; infC; 1.
DR   PROSITE; PS00938; IF3; 1.
PE   3: Inferred from homology;
KW   Chloroplast; Initiation factor; Plastid; Protein biosynthesis.
FT   CHAIN           1..182
FT                   /note="Translation initiation factor IF-3, chloroplastic"
FT                   /id="PRO_0000177618"
SQ   SEQUENCE   182 AA;  20862 MW;  3240C4C366E68E9D CRC64;
     MLEKYKNSKK LSRDLPQIND RIKFPKVRVI DDEGEQLGIF APEAAIQLAT KQGLDLVLVS
     DKSDPPVCRI LDYGKYKFTQ EKRAREAKKK QHNSSIKEVK MRYKIEEHDY KVRINQASKF
     LQSGDKVKAT ITFRGREIQH SNLAINLLNK MAADLVTIAE IQQAPSRDGR NVIMLLSPKK
     VN