MRPS21

MRPS21
Available structures
PDB	Ortholog search: PDBe RCSB
List of PDB id codes
	3J9M
Identifiers
Aliases	MRPS21, MRP-S21, RPMS21, MDS016, mitochondrial ribosomal protein S21, 28S ribosomal protein S21, mitochondrial
External IDs	OMIM: 611984; MGI: 1913542; HomoloGene: 45365; GeneCards: MRPS21; OMA:MRPS21 - orthologs
Gene location (Human)
Chr.	Chromosome 1 (human)
End	150,308,979 bp
Gene location (Mouse)
Chr.	Chromosome 3 (mouse)
End	95,778,831 bp
RNA expression pattern
	Top expressed in
	cardiac muscle tissue of right atrium; ; myocardium of left ventricle; ; lateral nuclear group of thalamus; ; Pons; ; sperm; ; pancreatic ductal cell; ; skin of arm; ; Brodmann area 23; ; renal medulla; ; external globus pallidus;
	Top expressed in
	right kidney; ; interventricular septum; ; muscle of thigh; ; plantaris muscle; ; cardiac muscle tissue of left ventricle; ; extensor digitorum longus muscle; ; skeletal muscle tissue; ; extraocular muscle; ; yolk sac; ; dentate gyrus of hippocampal formation granule cell;
	More reference expression data
	n/a
Gene ontology
Molecular function	structural constituent of ribosome; RNA binding;
Cellular component	mitochondrial inner membrane; ribosome; mitochondrion; mitochondrial small ribosomal subunit;
Biological process	mitochondrial translational elongation; mitochondrial translational termination; mitochondrial translation; protein biosynthesis;
	Sources:Amigo / QuickGO
Orthologs
	54460
	66292
	ENSG00000266472
	ENSMUSG00000054312
	P82921
	P58059
	NM_031901; NM_018997
	NM_078479; NM_001355759
	NP_061870; NP_114107
	NP_510964; NP_001342688
	Wikidata
View/Edit Human	View/Edit Mouse

28S ribosomal protein S21, mitochondrial is a protein that in humans is encoded by the MRPS21 gene.

Mammalian mitochondrial ribosomal proteins are encoded by nuclear genes and assist protein synthesis within the mitochondrion. Mitochondrial ribosomes (mitoribosomes) consist of a small 28S subunit and a large 39S subunit. They have an estimated 75% protein to rRNA composition compared to prokaryotic ribosomes, where this ratio is reversed. Another difference between mammalian mitoribosomes and prokaryotic ribosomes is that the latter contain a 5S rRNA. Among different species, the proteins comprising the mitoribosome differ greatly in sequence, and sometimes in biochemical properties, which prevents easy recognition by sequence homology. This gene encodes a 28S subunit protein that belongs to the ribosomal protein S21P family. Pseudogenes corresponding to this gene are found on chromosomes 1p, 1q, 9p, 10p, 10q, 16q, and 17q. Available sequence data analyses identified splice variants that differ in the 5' UTR; both transcripts encode the same protein.