MRPL12

Mitochondrial ribosomal protein L12
PDB rendering based on 2ftc.
Available structures PDB Ortholog search: PDBe, RCSB List of PDB id codes 2ftc​
Identifiers
Symbols	MRPL12 ; 5c5-2; L12mt; MRP-L31/34; MRPL7; MRPL7/L12; RPML12
External IDs	OMIM: 602375 MGI: 1926273 HomoloGene: 2212 GeneCards: MRPL12 Gene
Gene ontology Molecular function • RNA binding • structural constituent of ribosome • protein binding Cellular component • mitochondrion • mitochondrial inner membrane • mitochondrial large ribosomal subunit Biological process • transcription from mitochondrial promoter • translation • organelle organization • mitochondrial translation • positive regulation of transcription, DNA-templated • mitochondrial translational initiation • mitochondrial translational elongation • mitochondrial translational termination Sources: Amigo / QuickGO
RNA expression pattern
More reference expression data
Orthologs
Species	Human	Mouse
Entrez	6182	56282
Ensembl	ENSG00000262814	ENSMUSG00000039640
UniProt	P52815	Q9DB15
RefSeq (mRNA)	NM_002949	NM_027204
RefSeq (protein)	NP_002940	NP_081480
Location (UCSC)	Chr 17: 81.7 – 81.71 Mb	Chr 11: 120.48 – 120.49 Mb
PubMed search

39S ribosomal protein L12, mitochondrial is a protein that in humans is encoded by the MRPL12 gene.^[1][2][3]

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 which forms homodimers. In prokaryotic ribosomes, two L7/L12 dimers and one L10 protein form the L8 protein complex.^[3]

References

1. Marty L, Fort P (Jun 1996). "A delayed-early response nuclear gene encoding MRPL12, the mitochondrial homologue to the bacterial translational regulator L7/L12 protein". J Biol Chem 271 (19): 11468–76. doi:10.1074/jbc.271.19.11468. PMID 8626705.
2. Marty L, Taviaux S, Fort P (Jul 1997). "Expression and human chromosomal localization to 17q25 of the growth-regulated gene encoding the mitochondrial ribosomal protein MRPL12". Genomics 41 (3): 453–7. doi:10.1006/geno.1997.4691. PMID 9169145.
3. "Entrez Gene: MRPL12 mitochondrial ribosomal protein L12".

Further reading

• Graack HR, Bryant ML, O'Brien TW (2000). "Identification of mammalian mitochondrial ribosomal proteins (MRPs) by N-terminal sequencing of purified bovine MRPs and comparison to data bank sequences: the large subribosomal particle.". Biochemistry 38 (50): 16569–77. doi:10.1021/bi991543s. PMID 10600119.
• Kenmochi N, Suzuki T, Uechi T, et al. (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.
• Koc EC, Burkhart W, Blackburn K, et al. (2001). "The large subunit of the mammalian mitochondrial ribosome. Analysis of the complement of ribosomal proteins present.". J. Biol. Chem. 276 (47): 43958–69. doi:10.1074/jbc.M106510200. PMID 11551941.
• Strausberg RL, Feingold EA, Grouse LH, et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences.". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
• 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.
• Gerhard DS, Wagner L, Feingold EA, et al. (2004). "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).". Genome Res. 14 (10B): 2121–7. doi:10.1101/gr.2596504. PMC 528928. PMID 15489334.
• Andersen JS, Lam YW, Leung AK, et al. (2005). "Nucleolar proteome dynamics.". Nature 433 (7021): 77–83. doi:10.1038/nature03207. PMID 15635413.
• Stelzl U, Worm U, Lalowski M, et al. (2005). "A human protein-protein interaction network: a resource for annotating the proteome.". Cell 122 (6): 957–68. doi:10.1016/j.cell.2005.08.029. PMID 16169070.
• Wang Z, Cotney J, Shadel GS (2007). "Human mitochondrial ribosomal protein MRPL12 interacts directly with mitochondrial RNA polymerase to modulate mitochondrial gene expression.". J. Biol. Chem. 282 (17): 12610–8. doi:10.1074/jbc.M700461200. PMC 2606046. PMID 17337445.