ID   RS21_XENTR              Reviewed;          83 AA.
AC   Q6DDC6; Q28E89;
DT   20-DEC-2005, integrated into UniProtKB/Swiss-Prot.
DT   16-AUG-2004, sequence version 1.
DT   03-AUG-2022, entry version 96.
DE   RecName: Full=40S ribosomal protein S21;
GN   Name=rps21; ORFNames=TNeu092k20.1;
OS   Xenopus tropicalis (Western clawed frog) (Silurana tropicalis).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Amphibia;
OC   Batrachia; Anura; Pipoidea; Pipidae; Xenopodinae; Xenopus; Silurana.
OX   NCBI_TaxID=8364;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
RC   TISSUE=Neurula;
RG   Sanger Xenopus tropicalis EST/cDNA project;
RL   Submitted (MAR-2006) to the EMBL/GenBank/DDBJ databases.
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
RC   TISSUE=Embryo;
RG   NIH - Xenopus Gene Collection (XGC) project;
RL   Submitted (JUL-2004) to the EMBL/GenBank/DDBJ databases.
CC   -!- SUBUNIT: Component of the 40S small ribosomal subunit.
CC       {ECO:0000250|UniProtKB:P63220}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm, cytosol
CC       {ECO:0000250|UniProtKB:P63220}. Cytoplasm
CC       {ECO:0000250|UniProtKB:P63220}. Rough endoplasmic reticulum
CC       {ECO:0000250|UniProtKB:P63221}. Note=Detected on cytosolic polysomes
CC       (By similarity). Detected in ribosomes that are associated with the
CC       rough endoplasmic reticulum (By similarity).
CC       {ECO:0000250|UniProtKB:P63220, ECO:0000250|UniProtKB:P63221}.
CC   -!- SIMILARITY: Belongs to the eukaryotic ribosomal protein eS21 family.
CC       {ECO:0000305}.
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DR   EMBL; CR848394; CAJ82836.1; -; mRNA.
DR   EMBL; BC077662; AAH77662.1; -; mRNA.
DR   RefSeq; NP_001005126.1; NM_001005126.2.
DR   RefSeq; XP_017953199.1; XM_018097710.1.
DR   RefSeq; XP_017953200.1; XM_018097711.1.
DR   AlphaFoldDB; Q6DDC6; -.
DR   SMR; Q6DDC6; -.
DR   PaxDb; Q6DDC6; -.
DR   Ensembl; ENSXETT00000102641; ENSXETP00000065965; ENSXETG00000002012.
DR   GeneID; 448708; -.
DR   KEGG; xtr:448708; -.
DR   CTD; 6227; -.
DR   Xenbase; XB-GENE-1007930; rps21.
DR   eggNOG; KOG3486; Eukaryota.
DR   HOGENOM; CLU_167122_2_0_1; -.
DR   InParanoid; Q6DDC6; -.
DR   OMA; ALCGYIR; -.
DR   OrthoDB; 1571849at2759; -.
DR   PhylomeDB; Q6DDC6; -.
DR   TreeFam; TF300167; -.
DR   Reactome; R-XTR-156827; L13a-mediated translational silencing of Ceruloplasmin expression.
DR   Reactome; R-XTR-72649; Translation initiation complex formation.
DR   Reactome; R-XTR-72689; Formation of a pool of free 40S subunits.
DR   Reactome; R-XTR-72702; Ribosomal scanning and start codon recognition.
DR   Reactome; R-XTR-975957; Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC).
DR   Proteomes; UP000008143; Chromosome 10.
DR   Proteomes; UP000790000; Unplaced.
DR   Bgee; ENSXETG00000002012; Expressed in neurula embryo and 12 other tissues.
DR   GO; GO:0022627; C:cytosolic small ribosomal subunit; ISS:UniProtKB.
DR   GO; GO:0042788; C:polysomal ribosome; ISS:UniProtKB.
DR   GO; GO:0005791; C:rough endoplasmic reticulum; IEA:UniProtKB-SubCell.
DR   GO; GO:0003735; F:structural constituent of ribosome; IBA:GO_Central.
DR   GO; GO:0002181; P:cytoplasmic translation; ISS:UniProtKB.
DR   GO; GO:0000447; P:endonucleolytic cleavage in ITS1 to separate SSU-rRNA from 5.8S rRNA and LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA); IBA:GO_Central.
DR   GO; GO:0000461; P:endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA); IBA:GO_Central.
DR   Gene3D; 3.30.1230.20; -; 1.
DR   InterPro; IPR001931; Ribosomal_S21e.
DR   InterPro; IPR018279; Ribosomal_S21e_CS.
DR   InterPro; IPR038579; Ribosomal_S21e_sf.
DR   PANTHER; PTHR10442; PTHR10442; 1.
DR   Pfam; PF01249; Ribosomal_S21e; 1.
DR   PIRSF; PIRSF002148; Ribosomal_S21e; 1.
DR   PROSITE; PS00996; RIBOSOMAL_S21E; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Endoplasmic reticulum; Reference proteome; Ribonucleoprotein;
KW   Ribosomal protein.
FT   CHAIN           1..83
FT                   /note="40S ribosomal protein S21"
FT                   /id="PRO_0000194737"
SQ   SEQUENCE   83 AA;  9243 MW;  501EAE88AEA1AD0A CRC64;
     MQNDAGEFVD LYVPRKCSAS NRIIGAKDHA SIQINIAEVD KVTGRFNSQY KTYAICGAIR
     RMGESDDSIL RLAKNDCIVS KNF