ID   RL21_POLNS              Reviewed;         103 AA.
AC   B1XT33;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   20-MAY-2008, sequence version 1.
DT   03-AUG-2022, entry version 68.
DE   RecName: Full=50S ribosomal protein L21 {ECO:0000255|HAMAP-Rule:MF_01363};
GN   Name=rplU {ECO:0000255|HAMAP-Rule:MF_01363}; OrderedLocusNames=Pnec_0212;
OS   Polynucleobacter necessarius subsp. necessarius (strain STIR1).
OC   Bacteria; Proteobacteria; Betaproteobacteria; Burkholderiales;
OC   Burkholderiaceae; Polynucleobacter.
OX   NCBI_TaxID=452638;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=STIR1;
RX   PubMed=24167248; DOI=10.1073/pnas.1316687110;
RA   Boscaro V., Felletti M., Vannini C., Ackerman M.S., Chain P.S.,
RA   Malfatti S., Vergez L.M., Shin M., Doak T.G., Lynch M., Petroni G.;
RT   "Polynucleobacter necessarius, a model for genome reduction in both free-
RT   living and symbiotic bacteria.";
RL   Proc. Natl. Acad. Sci. U.S.A. 110:18590-18595(2013).
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; CP001010; ACB43510.1; -; Genomic_DNA.
DR   RefSeq; WP_012357277.1; NC_010531.1.
DR   AlphaFoldDB; B1XT33; -.
DR   SMR; B1XT33; -.
DR   STRING; 452638.Pnec_0212; -.
DR   EnsemblBacteria; ACB43510; ACB43510; Pnec_0212.
DR   KEGG; pne:Pnec_0212; -.
DR   eggNOG; COG0261; Bacteria.
DR   HOGENOM; CLU_061463_3_2_4; -.
DR   OMA; HRQEITR; -.
DR   OrthoDB; 1949059at2; -.
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..103
FT                   /note="50S ribosomal protein L21"
FT                   /id="PRO_1000143832"
SQ   SEQUENCE   103 AA;  11370 MW;  12E5697F218832E8 CRC64;
     MYAVIKTGGK QYKVAAGEKL KIEQIPAEIG SEITLDQVLA VGESASLKLG DPLVNGAAVM
     ATVVSQGRHD KVTIFKMRRR KHYQKHQGHR QNFTEILINT IKA