ID   RS4_ECO45               Reviewed;         206 AA.
AC   B7MCR2;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   24-MAR-2009, sequence version 1.
DT   10-JUN-2026, entry version 83.
DE   RecName: Full=Small ribosomal subunit protein uS4 {ECO:0000255|HAMAP-Rule:MF_01306};
DE   AltName: Full=30S ribosomal protein S4 {ECO:0000305};
GN   Name=rpsD {ECO:0000255|HAMAP-Rule:MF_01306};
GN   OrderedLocusNames=ECS88_3684;
OS   Escherichia coli O45:K1 (strain S88 / ExPEC).
OC   Bacteria; Pseudomonadati; Pseudomonadota; Gammaproteobacteria;
OC   Enterobacterales; Enterobacteriaceae; Escherichia.
OX   NCBI_TaxID=585035;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=S88 / ExPEC;
RX   PubMed=19165319; DOI=10.1371/journal.pgen.1000344;
RA   Touchon M., Hoede C., Tenaillon O., Barbe V., Baeriswyl S., Bidet P.,
RA   Bingen E., Bonacorsi S., Bouchier C., Bouvet O., Calteau A., Chiapello H.,
RA   Clermont O., Cruveiller S., Danchin A., Diard M., Dossat C., Karoui M.E.,
RA   Frapy E., Garry L., Ghigo J.M., Gilles A.M., Johnson J., Le Bouguenec C.,
RA   Lescat M., Mangenot S., Martinez-Jehanne V., Matic I., Nassif X., Oztas S.,
RA   Petit M.A., Pichon C., Rouy Z., Ruf C.S., Schneider D., Tourret J.,
RA   Vacherie B., Vallenet D., Medigue C., Rocha E.P.C., Denamur E.;
RT   "Organised genome dynamics in the Escherichia coli species results in
RT   highly diverse adaptive paths.";
RL   PLoS Genet. 5:E1000344-E1000344(2009).
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:0000255|HAMAP-Rule:MF_01306}.
CC   -!- FUNCTION: With S5 and S12 plays an important role in translational
CC       accuracy. {ECO:0000255|HAMAP-Rule:MF_01306}.
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. {ECO:0000255|HAMAP-Rule:MF_01306}.
CC   -!- SIMILARITY: Belongs to the universal ribosomal protein uS4 family.
CC       {ECO:0000255|HAMAP-Rule:MF_01306}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; CU928161; CAR04901.1; -; Genomic_DNA.
DR   RefSeq; WP_000135224.1; NC_011742.1.
DR   AlphaFoldDB; B7MCR2; -.
DR   EMDB; EMD-7014; -.
DR   EMDB; EMD-7015; -.
DR   EMDB; EMD-7016; -.
DR   EMDB; EMD-7970; -.
DR   EMDB; EMD-8621; -.
DR   EMDB; EMD-8826; -.
DR   EMDB; EMD-8829; -.
DR   SMR; B7MCR2; -.
DR   IntAct; B7MCR2; 1.
DR   GeneID; 67174229; -.
DR   GeneID; 93778691; -.
DR   KEGG; ecz:ECS88_3684; -.
DR   HOGENOM; CLU_092403_0_2_6; -.
DR   Proteomes; UP000000747; Chromosome.
DR   GO; GO:0015935; C:small ribosomal subunit; IEA:InterPro.
DR   GO; GO:0019843; F:rRNA binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0003735; F:structural constituent of ribosome; IEA:InterPro.
DR   GO; GO:0042274; P:ribosomal small subunit biogenesis; IEA:TreeGrafter.
DR   GO; GO:0006412; P:translation; IEA:UniProtKB-UniRule.
DR   CDD; cd00165; S4; 1.
DR   FunFam; 1.10.1050.10:FF:000001; 30S ribosomal protein S4; 1.
DR   FunFam; 3.10.290.10:FF:000001; 30S ribosomal protein S4; 1.
DR   Gene3D; 1.10.1050.10; Ribosomal Protein S4 Delta 41, Chain A, domain 1; 1.
DR   Gene3D; 3.10.290.10; RNA-binding S4 domain; 1.
DR   HAMAP; MF_01306_B; Ribosomal_uS4_B; 1.
DR   InterPro; IPR022801; Ribosomal_uS4.
DR   InterPro; IPR005709; Ribosomal_uS4_bact.
DR   InterPro; IPR018079; Ribosomal_uS4_CS.
DR   InterPro; IPR001912; Ribosomal_uS4_N.
DR   InterPro; IPR002942; S4_RNA-bd.
DR   InterPro; IPR036986; S4_RNA-bd_sf.
DR   NCBIfam; NF003717; PRK05327.1; 1.
DR   NCBIfam; TIGR01017; rpsD_bact; 1.
DR   PANTHER; PTHR11831; 30S 40S RIBOSOMAL PROTEIN; 1.
DR   PANTHER; PTHR11831:SF4; SMALL RIBOSOMAL SUBUNIT PROTEIN US4M; 1.
DR   Pfam; PF00163; Ribosomal_S4; 1.
DR   Pfam; PF01479; S4; 1.
DR   SMART; SM01390; Ribosomal_S4; 1.
DR   SMART; SM00363; S4; 1.
DR   SUPFAM; SSF55174; Alpha-L RNA-binding motif; 1.
DR   PROSITE; PS00632; RIBOSOMAL_S4; 1.
DR   PROSITE; PS50889; S4; 1.
PE   3: Inferred from homology;
KW   Reference proteome; Ribonucleoprotein; Ribosomal protein; RNA-binding;
KW   rRNA-binding.
FT   CHAIN           1..206
FT                   /note="Small ribosomal subunit protein uS4"
FT                   /id="PRO_1000140724"
FT   DOMAIN          96..156
FT                   /note="S4 RNA-binding"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01306"
SQ   SEQUENCE   206 AA;  23469 MW;  4015969DF8E582BB CRC64;
     MARYLGPKLK LSRREGTDLF LKSGVRAIDT KCKIEQAPGQ HGARKPRLSD YGVQLREKQK
     VRRIYGVLER QFRNYYKEAA RLKGNTGENL LALLEGRLDN VVYRMGFGAT RAEARQLVSH
     KAIMVNGRVV NIASYQVSPN DVVSIREKAK KQSRVKAALE LAEQREKPTW LEVDAGKMEG
     TFKRKPERSD LSADINEHLI VELYSK
//