ID   RR4_HELSJ               Reviewed;         173 AA.
AC   Q2EEX1;
DT   10-JUL-2007, integrated into UniProtKB/Swiss-Prot.
DT   21-MAR-2006, sequence version 1.
DT   25-MAY-2022, entry version 55.
DE   RecName: Full=Plastid 30S ribosomal protein S4;
GN   Name=rps4;
OS   Helicosporidium sp. subsp. Simulium jonesii (Green alga).
OG   Plastid; Non-photosynthetic plastid.
OC   Eukaryota; Viridiplantae; Chlorophyta; core chlorophytes; Trebouxiophyceae;
OC   Chlorellales; Chlorellaceae; Helicosporidium; unclassified Helicosporidium.
OX   NCBI_TaxID=145475;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX   PubMed=16630350; DOI=10.1186/1741-7007-4-12;
RA   de Koning A.P., Keeling P.J.;
RT   "The complete plastid genome sequence of the parasitic green alga,
RT   Helicosporidium sp. is highly reduced and structured.";
RL   BMC Biol. 4:12-12(2006).
CC   -!- FUNCTION: One of the primary rRNA binding proteins, it binds directly
CC       to 16S rRNA where it nucleates assembly of the body of the 30S subunit.
CC       {ECO:0000250}.
CC   -!- FUNCTION: With S5 and S12 plays an important role in translational
CC       accuracy. {ECO:0000250}.
CC   -!- SUBUNIT: Part of the 30S ribosomal subunit. Contacts protein S5. The
CC       interaction surface between S4 and S5 is involved in control of
CC       translational fidelity (By similarity). {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Plastid.
CC   -!- SIMILARITY: Belongs to the universal ribosomal protein uS4 family.
CC       {ECO:0000305}.
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DR   EMBL; DQ398104; ABD33971.1; -; Genomic_DNA.
DR   RefSeq; YP_635923.1; NC_008100.1.
DR   AlphaFoldDB; Q2EEX1; -.
DR   SMR; Q2EEX1; -.
DR   GeneID; 4100443; -.
DR   GO; GO:0009536; C:plastid; IEA:UniProtKB-SubCell.
DR   GO; GO:0005840; C:ribosome; IEA:UniProtKB-KW.
DR   GO; GO:0019843; F:rRNA binding; IEA:UniProtKB-KW.
DR   CDD; cd00165; S4; 1.
DR   Gene3D; 3.10.290.10; -; 1.
DR   InterPro; IPR022801; Ribosomal_S4/S9.
DR   InterPro; IPR001912; Ribosomal_S4/S9_N.
DR   InterPro; IPR018079; Ribosomal_S4_CS.
DR   InterPro; IPR002942; S4_RNA-bd.
DR   InterPro; IPR036986; S4_RNA-bd_sf.
DR   PANTHER; PTHR11831; PTHR11831; 1.
DR   Pfam; PF00163; Ribosomal_S4; 1.
DR   Pfam; PF01479; S4; 1.
DR   SMART; SM01390; Ribosomal_S4; 1.
DR   SMART; SM00363; S4; 1.
DR   PROSITE; PS00632; RIBOSOMAL_S4; 1.
DR   PROSITE; PS50889; S4; 1.
PE   3: Inferred from homology;
KW   Plastid; Ribonucleoprotein; Ribosomal protein; RNA-binding; rRNA-binding.
FT   CHAIN           1..173
FT                   /note="Plastid 30S ribosomal protein S4"
FT                   /id="PRO_0000293427"
FT   DOMAIN          94..155
FT                   /note="S4 RNA-binding"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00182"
SQ   SEQUENCE   173 AA;  20132 MW;  8473B2A20FED184A CRC64;
     MGRYRGPRLR IIRRLGDLPL FTKKKPHIAS KRLPLGHPVR KIKRRPSIYG LRLLAKQRCC
     YSYGLRDYQL KNYIKKARNA QGDPIKNLIF LLESRLDSKI YRSGIVSTMA AARQLITHGH
     VLVDNIKITI PSYSCNESQI LDYKNTKLTS ELIEKIKLSF NPIYVLEYYA IKL