ID   RS18_PROM9              Reviewed;          73 AA.
AC   Q31AV3;
DT   15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT   06-DEC-2005, sequence version 1.
DT   25-MAY-2022, entry version 87.
DE   RecName: Full=30S ribosomal protein S18 {ECO:0000255|HAMAP-Rule:MF_00270};
GN   Name=rpsR {ECO:0000255|HAMAP-Rule:MF_00270};
GN   Synonyms=rps18 {ECO:0000255|HAMAP-Rule:MF_00270};
GN   OrderedLocusNames=PMT9312_0932;
OS   Prochlorococcus marinus (strain MIT 9312).
OC   Bacteria; Cyanobacteria; Synechococcales; Prochlorococcaceae;
OC   Prochlorococcus.
OX   NCBI_TaxID=74546;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=MIT 9312;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C., Glavina T.,
RA   Hammon N., Israni S., Pitluck S., Thiel J., Schmutz J., Larimer F.,
RA   Land M., Kyrpides N., Lykidis A., Richardson P.;
RT   "Complete sequence of Prochlorococcus marinus str. MIT 9312.";
RL   Submitted (JUL-2005) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Binds as a heterodimer with protein S6 to the central domain
CC       of the 16S rRNA, where it helps stabilize the platform of the 30S
CC       subunit. {ECO:0000255|HAMAP-Rule:MF_00270}.
CC   -!- SUBUNIT: Part of the 30S ribosomal subunit. Forms a tight heterodimer
CC       with protein S6. {ECO:0000255|HAMAP-Rule:MF_00270}.
CC   -!- SIMILARITY: Belongs to the bacterial ribosomal protein bS18 family.
CC       {ECO:0000255|HAMAP-Rule:MF_00270}.
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DR   EMBL; CP000111; ABB49992.1; -; Genomic_DNA.
DR   RefSeq; WP_002806014.1; NC_007577.1.
DR   AlphaFoldDB; Q31AV3; -.
DR   SMR; Q31AV3; -.
DR   STRING; 74546.PMT9312_0932; -.
DR   EnsemblBacteria; ABB49992; ABB49992; PMT9312_0932.
DR   KEGG; pmi:PMT9312_0932; -.
DR   eggNOG; COG0238; Bacteria.
DR   HOGENOM; CLU_148710_2_3_3; -.
DR   OMA; QKKYCRF; -.
DR   OrthoDB; 1940575at2; -.
DR   Proteomes; UP000002715; Chromosome.
DR   GO; GO:0005840; C:ribosome; IEA:UniProtKB-KW.
DR   GO; GO:0019843; F:rRNA binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0003735; F:structural constituent of ribosome; IEA:InterPro.
DR   GO; GO:0006412; P:translation; IEA:UniProtKB-UniRule.
DR   Gene3D; 4.10.640.10; -; 1.
DR   HAMAP; MF_00270; Ribosomal_S18; 1.
DR   InterPro; IPR001648; Ribosomal_S18.
DR   InterPro; IPR018275; Ribosomal_S18_CS.
DR   InterPro; IPR036870; Ribosomal_S18_sf.
DR   PANTHER; PTHR13479; PTHR13479; 1.
DR   Pfam; PF01084; Ribosomal_S18; 1.
DR   PRINTS; PR00974; RIBOSOMALS18.
DR   SUPFAM; SSF46911; SSF46911; 1.
DR   TIGRFAMs; TIGR00165; S18; 1.
DR   PROSITE; PS00057; RIBOSOMAL_S18; 1.
PE   3: Inferred from homology;
KW   Ribonucleoprotein; Ribosomal protein; RNA-binding; rRNA-binding.
FT   CHAIN           1..73
FT                   /note="30S ribosomal protein S18"
FT                   /id="PRO_1000003561"
SQ   SEQUENCE   73 AA;  8317 MW;  3342A45AADB43285 CRC64;
     MPNSIFKKQL SPIKPGDPID YKDVELLKKF ITERGKILPR RMTGLTSKQQ RDLTLAVKRA
     RIVALLPFVN PEG