ID   RL21_SYNE7              Reviewed;         127 AA.
AC   Q9Z3H5; Q31NX0; Q79PF7;
DT   30-MAY-2000, integrated into UniProtKB/Swiss-Prot.
DT   01-MAY-1999, sequence version 1.
DT   03-AUG-2022, entry version 97.
DE   RecName: Full=50S ribosomal protein L21 {ECO:0000255|HAMAP-Rule:MF_01363};
GN   Name=rplU {ECO:0000255|HAMAP-Rule:MF_01363};
GN   Synonyms=rpl21 {ECO:0000255|HAMAP-Rule:MF_01363};
GN   OrderedLocusNames=Synpcc7942_1219; ORFNames=sef0008;
OS   Synechococcus elongatus (strain PCC 7942 / FACHB-805) (Anacystis nidulans
OS   R2).
OC   Bacteria; Cyanobacteria; Synechococcales; Synechococcaceae; Synechococcus.
OX   NCBI_TaxID=1140;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=9727980; DOI=10.1126/science.281.5382.1519;
RA   Ishiura M., Kutsuna S., Aoki S., Iwasaki H., Andersson C.R., Tanabe A.,
RA   Golden S.S., Johnson C.H., Kondo T.;
RT   "Expression of a gene cluster kaiABC as a circadian feedback process in
RT   cyanobacteria.";
RL   Science 281:1519-1523(1998).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RA   Holtman C.K., Sandoval P., Chen Y., Socias T., Mohler B.J., McMurtry S.,
RA   Gonzalez A., Salinas I., Golden S.S., Youderian P.;
RT   "Synechococcus elongatus PCC7942 cosmid 7G3.";
RL   Submitted (JUN-2002) to the EMBL/GenBank/DDBJ databases.
RN   [3]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=PCC 7942 / FACHB-805;
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., Schmutz J., Larimer F., Land M.,
RA   Kyrpides N., Lykidis A., Richardson P.;
RT   "Complete sequence of chromosome 1 of Synechococcus elongatus PCC 7942.";
RL   Submitted (AUG-2005) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: This protein binds to 23S rRNA in the presence of protein
CC       L20. {ECO:0000255|HAMAP-Rule:MF_01363}.
CC   -!- SUBUNIT: Part of the 50S ribosomal subunit. Contacts protein L20.
CC       {ECO:0000255|HAMAP-Rule:MF_01363}.
CC   -!- SIMILARITY: Belongs to the bacterial ribosomal protein bL21 family.
CC       {ECO:0000255|HAMAP-Rule:MF_01363}.
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DR   EMBL; AB010691; BAA37100.1; -; Genomic_DNA.
DR   EMBL; AY120853; AAM82683.1; -; Genomic_DNA.
DR   EMBL; CP000100; ABB57249.1; -; Genomic_DNA.
DR   PIR; T44266; T44266.
DR   RefSeq; WP_011377922.1; NC_007604.1.
DR   AlphaFoldDB; Q9Z3H5; -.
DR   SMR; Q9Z3H5; -.
DR   STRING; 1140.Synpcc7942_1219; -.
DR   PRIDE; Q9Z3H5; -.
DR   EnsemblBacteria; ABB57249; ABB57249; Synpcc7942_1219.
DR   KEGG; syf:Synpcc7942_1219; -.
DR   eggNOG; COG0261; Bacteria.
DR   HOGENOM; CLU_061463_1_2_3; -.
DR   OMA; HRQEITR; -.
DR   OrthoDB; 1949059at2; -.
DR   BioCyc; SYNEL:SYNPCC7942_1219-MON; -.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProt.
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   HAMAP; MF_01363; Ribosomal_L21; 1.
DR   InterPro; IPR036164; L21-like_sf.
DR   InterPro; IPR028909; L21p-like.
DR   InterPro; IPR001787; Ribosomal_L21.
DR   InterPro; IPR018258; Ribosomal_L21_CS.
DR   PANTHER; PTHR21349; PTHR21349; 1.
DR   Pfam; PF00829; Ribosomal_L21p; 1.
DR   SUPFAM; SSF141091; SSF141091; 1.
DR   TIGRFAMs; TIGR00061; L21; 1.
DR   PROSITE; PS01169; RIBOSOMAL_L21; 1.
PE   3: Inferred from homology;
KW   Ribonucleoprotein; Ribosomal protein; RNA-binding; rRNA-binding.
FT   CHAIN           1..127
FT                   /note="50S ribosomal protein L21"
FT                   /id="PRO_0000181015"
SQ   SEQUENCE   127 AA;  13870 MW;  3B77CE1198EF4BC0 CRC64;
     MAYAIIEASG KQLWVEPGRF YDLDRLDADL DQSLTLDKVL LVQDEGAPQI GQPYVAGATV
     QVTVLSHPRG RKVTVYKMKP KKKTRKKQGH RQDLTRVLVE SITVGGKVLT ANAADLPKSE
     ADIDAAG