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From Wikipedia, the free encyclopedia

MRPS18A
Available structures
PDBOrtholog search: PDBe RCSB
Identifiers
AliasesMRPS18A, HumanS18b, MRP-S18-3, MRPS18-3, S18bmt, mitochondrial ribosomal protein S18A, S18mt-a, MRP-S18-a
External IDsOMIM: 611981 MGI: 1915815 HomoloGene: 32391 GeneCards: MRPS18A
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_001193343
NM_018135

NM_026768

RefSeq (protein)

NP_001180272
NP_060605

NP_081044

Location (UCSC)Chr 6: 43.67 – 43.69 MbChr 17: 46.42 – 46.44 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse

28S ribosomal protein S18a, mitochondrial is a protein that in humans is encoded by the MRPS18A gene.[5][6][7]

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 28S subunit protein that belongs to the ribosomal protein S18P family. The encoded protein is one of three that has significant sequence similarity to bacterial S18 proteins. The primary sequences of the three human mitochondrial S18 proteins are no more closely related to each other than they are to the prokaryotic S18 proteins. A pseudogene corresponding to this gene is found on chromosome 3p.[7]

References

  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000096080 - Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000023967 - Ensembl, May 2017
  3. ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. ^ Cavdar Koc E, Burkhart W, Blackburn K, Moseley A, Spremulli LL (May 2001). "The small subunit of the mammalian mitochondrial ribosome. Identification of the full complement of ribosomal proteins present". J Biol Chem. 276 (22): 19363–74. CiteSeerX 10.1.1.501.8919. doi:10.1074/jbc.M100727200. PMID 11279123.
  6. ^ Kenmochi N, Suzuki T, Uechi T, Magoori M, Kuniba M, Higa S, Watanabe K, Tanaka T (Sep 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.
  7. ^ a b "Entrez Gene: MRPS18A mitochondrial ribosomal protein S18A".

Further reading


This page was last edited on 11 January 2024, at 08:19
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