Mitochondrial ribosomal protein L23

39S ribosomal protein L23, mitochondrial is a protein that in humans is encoded by the MRPL23 gene.

MRPL23
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 3J7Y, 3J9M
Identifiers
Aliases	MRPL23, L23MRP, RPL23, RPL23L, mitochondrial ribosomal protein L23
External IDs	OMIM: 600789; MGI: 1196612; HomoloGene: 7922; GeneCards: MRPL23; OMA:MRPL23 - orthologs
Gene location (Human) Chr. Chromosome 11 (human) Band 11p15.5 Start 1,947,278 bp End 1,984,522 bp
Gene location (Mouse) Chr. Chromosome 7 (mouse) Band 7 F5|7 87.95 cM Start 142,086,423 bp End 142,094,484 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in olfactory zone of nasal mucosa apex of heart right uterine tube mucosa of transverse colon anterior pituitary left adrenal cortex gastrocnemius muscle skin of abdomen minor salivary glands right lobe of liver Top expressed in yolk sac epiblast embryo quadriceps femoris muscle blastocyst embryo neural tube muscle tissue morula stomach More reference expression data BioGPS More reference expression data
Gene ontology Molecular function protein binding RNA binding structural constituent of ribosome Cellular component mitochondrial inner membrane ribosome intracellular anatomical structure mitochondrion fibrillar center mitochondrial large ribosomal subunit Biological process mitochondrial translational elongation mitochondrial translational termination protein biosynthesis mitochondrial translation Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 6150 19935 Ensembl ENSG00000214026 ENSG00000288141 ENSMUSG00000037772 UniProt Q16540 O35972 RefSeq (mRNA) NM_021134 NM_011288 RefSeq (protein) NP_066957 NP_035418 Location (UCSC) Chr 11: 1.95 – 1.98 Mb Chr 7: 142.09 – 142.09 Mb PubMed search
Wikidata
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Function

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. The gene is biallelically expressed, despite its location within a region of imprinted genes on chromosome 11.

Further reading

• Sun XX, Dai MS, Lu H (2007). "5-fluorouracil activation of p53 involves an MDM2-ribosomal protein interaction". J. Biol. Chem. 282 (11): 8052–9. doi:10.1074/jbc.M610621200. PMID 17242401.
• Zhang Z, Gerstein M (2003). "Identification and characterization of over 100 mitochondrial ribosomal protein pseudogenes in the human genome". Genomics. 81 (5): 468–80. doi:10.1016/S0888-7543(03)00004-1. PMID 12706105.
• O'Brien TW (2002). "Evolution of a protein-rich mitochondrial ribosome: implications for human genetic disease". Gene. 286 (1): 73–9. doi:10.1016/S0378-1119(01)00808-3. PMID 11943462.
• Kenmochi N, Suzuki T, Uechi T, Magoori M, Kuniba M, Higa S, Watanabe K, Tanaka T (2001). "The human mitochondrial ribosomal protein genes: mapping of 54 genes to the chromosomes and implications for human disorders". Genomics. 77 (1–2): 65–70. doi:10.1006/geno.2001.6622. PMID 11543634.
• Suzuki T, Terasaki M, Takemoto-Hori C, Hanada T, Ueda T, Wada A, Watanabe K (2001). "Structural compensation for the deficit of rRNA with proteins in the mammalian mitochondrial ribosome. Systematic analysis of protein components of the large ribosomal subunit from mammalian mitochondria". J. Biol. Chem. 276 (24): 21724–36. doi:10.1074/jbc.M100432200. PMID 11279069.

External links

• Overview of all the structural information available in the PDB for UniProt: Q16540 (39S ribosomal protein L23, mitochondrial) at the PDBe-KB.