Biology:TOMM40

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Short description: Protein-coding gene in the species Homo sapiens


A representation of the 3D structure of the protein myoglobin showing turquoise α-helices.
Generic protein structure example


Translocase of outer mitochondrial membrane 40 homolog (yeast), also known as TOMM40, is a protein which in humans is encoded by the TOMM40 gene.[1][2]

Function

TOMM40 codes for a protein that is embedded into outer membranes of mitochondria and is required for the movement of proteins into mitochondria. More precisely, TOMM40 is the channel-forming subunit of a translocase of the mitochondrial outer membrane (TOM) that is essential for protein transport into mitochondria.[3]

Clinical significance

In humans, certain alleles of this gene have been statistically associated with an increased risk of developing late-onset Alzheimer's disease.[4][5] One study has found that TOMM40 risk alleles appears twice as often in people with Alzheimer's disease than those without it.[6] Because TOMM40 is located on chromosome 19, and is closely adjacent to APOE,[2] another gene known to be associated with Alzheimer's, another study has suggested that the statistically significant correlation of TOMM40 with Alzheimer's is due to linkage disequilibrium.[7][8]

See also

References

  1. "Entrez Gene: TOMM40 translocase of outer mitochondrial membrane 40 homolog (yeast)". https://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=10452. 
  2. 2.0 2.1 "Sequencing of 42kb of the APO E-C2 gene cluster reveals a new gene: PEREC1". DNA Seq. 9 (2): 89–100. 1998. doi:10.3109/10425179809086433. PMID 10520737. 
  3. "Dissection of the mitochondrial import and assembly pathway for human Tom40". J. Biol. Chem. 280 (12): 11535–43. March 2005. doi:10.1074/jbc.M413816200. PMID 15644312. 
  4. "Accumulation of amyloid precursor protein in the mitochondrial import channels of human Alzheimer's disease brain is associated with mitochondrial dysfunction". J. Neurosci. 26 (35): 9057–68. August 2006. doi:10.1523/JNEUROSCI.1469-06.2006. PMID 16943564. 
  5. "Apoe-3 And Tomm-40 Haplotypes Determine Inheritance Of Alzheimer's Disease Independently Of Apoe-4 Risk". Alzheimer's Association 2009 International Conference on Alzheimer's Disease. Alzheimer's Association. 2009-07-12. http://www.abstractsonline.com/plan/ViewAbstract.aspx?sKey=044f000c-6554-4b15-9b4c-c75b0d2cec2b&cKey=067409c6-abb8-4523-9a42-b71fa4f969c4. ; Cortez MF (2009-07-12). "Alzheimer's Gene Discovery May Help Predict Age Disease Hits". Bloomberg.com. https://www.bloomberg.com/apps/news?pid=20601087&sid=a0kkLHdYJCU4. 
  6. Domschke, Katharina, ed (2009). "Hippocampal Atrophy as a Quantitative Trait in a Genome-Wide Association Study Identifying Novel Susceptibility Genes for Alzheimer's Disease". PLOS ONE 4 (8): e6501. doi:10.1371/journal.pone.0006501. PMID 19668339. Bibcode2009PLoSO...4.6501P. 
  7. "Comprehensive Analysis of APOE and Selected Proximate Markers for Late-onset Alzheimer Disease: Pattern of Linkage Disequilibrium and Disease/Marker Association". Genomics 89 (6): 655–65. June 2007. doi:10.1016/j.ygeno.2007.02.002. PMID 17434289. 
  8. Bu G (May 2009). "Apolipoprotein E and its receptors in Alzheimer's disease: pathways, pathogenesis and therapy". Nat. Rev. Neurosci. 10 (5): 333–44. doi:10.1038/nrn2620. PMID 19339974. 

Further reading