ID   RS4_CLOD6               Reviewed;         207 AA.
AC   Q18CI6;
DT   10-JUL-2007, integrated into UniProtKB/Swiss-Prot.
DT   25-JUL-2006, sequence version 1.
DT   04-NOV-2026, entry version 106.
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=CD630_00970;
OS   Clostridioides difficile (strain 630) (Peptoclostridium difficile).
OC   Bacteria; Bacillati; Bacillota; Clostridia; Peptostreptococcales;
OC   Peptostreptococcaceae; Clostridioides.
OX   NCBI_TaxID=272563;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=630;
RX   PubMed=16804543; DOI=10.1038/ng1830;
RA   Sebaihia M., Wren B.W., Mullany P., Fairweather N.F., Minton N.,
RA   Stabler R., Thomson N.R., Roberts A.P., Cerdeno-Tarraga A.M., Wang H.,
RA   Holden M.T.G., Wright A., Churcher C., Quail M.A., Baker S., Bason N.,
RA   Brooks K., Chillingworth T., Cronin A., Davis P., Dowd L., Fraser A.,
RA   Feltwell T., Hance Z., Holroyd S., Jagels K., Moule S., Mungall K.,
RA   Price C., Rabbinowitsch E., Sharp S., Simmonds M., Stevens K., Unwin L.,
RA   Whithead S., Dupuy B., Dougan G., Barrell B., Parkhill J.;
RT   "The multidrug-resistant human pathogen Clostridium difficile has a highly
RT   mobile, mosaic genome.";
RL   Nat. Genet. 38:779-786(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: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}.
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DR   EMBL; AM180355; CAJ66916.1; -; Genomic_DNA.
DR   RefSeq; WP_003421121.1; NC_009089.1.
DR   AlphaFoldDB; Q18CI6; -.
DR   SMR; Q18CI6; -.
DR   STRING; 272563.CD630_00970; -.
DR   EnsemblBacteria; CAJ66916; CAJ66916; CD630_00970.
DR   GeneID; 66352599; -.
DR   KEGG; cdf:CD630_00970; -.
DR   KEGG; pdc:CDIF630_00167; -.
DR   PATRIC; fig|272563.120.peg.107; -.
DR   eggNOG; COG0522; Bacteria.
DR   OMA; AAFRLYY; -.
DR   OrthoDB; 9803672at2; -.
DR   PhylomeDB; Q18CI6; -.
DR   BioCyc; PDIF272563:G12WB-155-MONOMER; -.
DR   Proteomes; UP000001978; 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; rpsD; 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..207
FT                   /note="Small ribosomal subunit protein uS4"
FT                   /id="PRO_0000293260"
FT   DOMAIN          98..164
FT                   /note="S4 RNA-binding"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01306"
SQ   SEQUENCE   207 AA;  23566 MW;  E24D5271B0C81468 CRC64;
     MARYTGASCR QCRREGMKLF LKGDRCYTDK CAIVKRNYAP GQHGQGRKKV SNYGLQLREK
     QKVKRIYGVL ETQFRNLYER AENMPGKAGE NLLSLLERRL DNVVYRMGLA SSRKEARQLV
     THGHFTLNGN KVDIPSLIVK VGDVIEVKEK SRSSAKFKNL VEVNSRIAPK WLEANVEGMT
     AKVVGVPTRE DIDLEIAEHL IIELYSK
//