MRPL21

Mammalian mitochondrial ribosomal proteins are encoded by nuclear genes and help in 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 39S subunit protein. Multiple transcript variants encoding different isoforms were identified through sequence analysis although some may be subject to nonsense-mediated decay (NMD). [provided by RefSeq, Jul 2008]

Description

Mitochondrial ribosomal protein L21

Tissue specificity

Low tissue specificity

Subcell location

Nucleoplasm, Mitochondria

Predicted location

Intracellular

Protein family

Mapped to neXtProt
Mapped to UniProt SWISS-PROT
Predicted intracellular proteins
Protein evidence (Ezkurdia et al 2014)
Protein evidence (Kim et al 2014)
Ribosomal proteins

Chromosome

11 (68891276 - 68903835)

Ensembl ID

ENSG00000197345  (ver. 103.38)

Orthologs

Mouse Mrpl21: ENSMUSG00000024829

UniProt

Q7Z2W9

neXtProt

NX_Q7Z2W9

Human splice variants
Mouse splice variants

Protein structure