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Genetics Home Reference: your guide to understanding genetic conditions
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MPV17

Reviewed January 2013

What is the official name of the MPV17 gene?

The official name of this gene is “MpV17 mitochondrial inner membrane protein.”

MPV17 is the gene's official symbol. The MPV17 gene is also known by other names, listed below.

What is the normal function of the MPV17 gene?

The MPV17 gene provides instructions for making a protein whose function is largely unknown. The MPV17 protein is located in the inner membrane of cell structures called mitochondria. Mitochondria are involved in a wide variety of cellular activities, including energy production, chemical signaling, and regulation of cell growth and division. Mitochondria contain their own DNA, known as mitochondrial DNA (mtDNA), which is essential for the normal function of these structures. It is likely that the MPV17 protein is involved in the maintenance of mtDNA. Having an adequate amount of mtDNA is essential for normal energy production within cells.

How are changes in the MPV17 gene related to health conditions?

MPV17-related hepatocerebral mitochondrial DNA depletion syndrome - caused by mutations in the MPV17 gene

More than 30 mutations in the MPV17 gene have been found to cause MPV17-related hepatocerebral mitochondrial DNA depletion syndrome, a condition characterized by liver disease and neurological problems that begin in infancy. Most of the mutations that cause this condition change single protein building blocks (amino acids) in the MPV17 protein. One mutation that almost exclusively affects the Navajo population of the southwestern United States replaces the amino acid arginine with the amino acid glutamine at position 50 in the protein (written as R50Q). This mutation results in the production of an unstable MPV17 protein that is quickly broken down. When the condition occurs in people of Navajo ancestry, it is called Navajo neurohepatopathy.

The changes in the MPV17 protein that cause MPV17-related hepatocerebral mitochondrial DNA depletion syndrome, including the R50Q mutation, impair protein function and reduce the amount of protein that is available. A dysfunctional or absent MPV17 protein leads to problems with the maintenance of mtDNA, which can cause a reduction in the amount of mtDNA (known as mitochondrial DNA depletion). Mitochondrial DNA depletion impairs mitochondrial function in many of the body's cells and tissues, particularly the brain, liver, and other tissues that have high energy requirements. Reduced mitochondrial function in the liver and brain lead to the liver failure and neurological dysfunction associated with MPV17-related hepatocerebral mitochondrial DNA depletion syndrome. Researchers suggest that the less mtDNA that is available in cells, the more severe the features of Navajo neurohepatopathy.

Where is the MPV17 gene located?

Cytogenetic Location: 2p23.3

Molecular Location on chromosome 2: base pairs 27,309,489 to 27,325,679

The MPV17 gene is located on the short (p) arm of chromosome 2 at position 23.3.

The MPV17 gene is located on the short (p) arm of chromosome 2 at position 23.3.

More precisely, the MPV17 gene is located from base pair 27,309,489 to base pair 27,325,679 on chromosome 2.

See How do geneticists indicate the location of a gene? (http://ghr.nlm.nih.gov/handbook/howgeneswork/genelocation) in the Handbook.

Where can I find additional information about MPV17?

You and your healthcare professional may find the following resources about MPV17 helpful.

You may also be interested in these resources, which are designed for genetics professionals and researchers.

What other names do people use for the MPV17 gene or gene products?

  • MPV17_HUMAN
  • MTDPS6
  • SYM1

See How are genetic conditions and genes named? (http://ghr.nlm.nih.gov/handbook/mutationsanddisorders/naming) in the Handbook.

What glossary definitions help with understanding MPV17?

acids ; amino acid ; arginine ; cell ; deletion ; depletion ; DNA ; gene ; glutamine ; liver failure ; mitochondria ; mutation ; neurological ; oxidative phosphorylation ; phosphorylation ; population ; protein ; syndrome

You may find definitions for these and many other terms in the Genetics Home Reference Glossary (http://ghr.nlm.nih.gov/glossary).

References

  • El-Hattab AW, Li FY, Schmitt E, Zhang S, Craigen WJ, Wong LJ. MPV17-associated hepatocerebral mitochondrial DNA depletion syndrome: new patients and novel mutations. Mol Genet Metab. 2010 Mar;99(3):300-8. doi: 10.1016/j.ymgme.2009.10.003. Epub 2009 Oct 13. (http://www.ncbi.nlm.nih.gov/pubmed/20074988?dopt=Abstract)
  • Karadimas CL, Vu TH, Holve SA, Chronopoulou P, Quinzii C, Johnsen SD, Kurth J, Eggers E, Palenzuela L, Tanji K, Bonilla E, De Vivo DC, DiMauro S, Hirano M. Navajo neurohepatopathy is caused by a mutation in the MPV17 gene. Am J Hum Genet. 2006 Sep;79(3):544-8. Epub 2006 Jun 28. (http://www.ncbi.nlm.nih.gov/pubmed/16909392?dopt=Abstract)
  • OMIM: MPV17, MOUSE, HOMOLOG OF (http://omim.org/entry/137960)
  • NCBI Gene (http://www.ncbi.nlm.nih.gov/gene/4358)
  • Spinazzola A, Santer R, Akman OH, Tsiakas K, Schaefer H, Ding X, Karadimas CL, Shanske S, Ganesh J, Di Mauro S, Zeviani M. Hepatocerebral form of mitochondrial DNA depletion syndrome: novel MPV17 mutations. Arch Neurol. 2008 Aug;65(8):1108-13. doi: 10.1001/archneur.65.8.1108. (http://www.ncbi.nlm.nih.gov/pubmed/18695062?dopt=Abstract)
  • Spinazzola A, Viscomi C, Fernandez-Vizarra E, Carrara F, D'Adamo P, Calvo S, Marsano RM, Donnini C, Weiher H, Strisciuglio P, Parini R, Sarzi E, Chan A, DiMauro S, Rötig A, Gasparini P, Ferrero I, Mootha VK, Tiranti V, Zeviani M. MPV17 encodes an inner mitochondrial membrane protein and is mutated in infantile hepatic mitochondrial DNA depletion. Nat Genet. 2006 May;38(5):570-5. Epub 2006 Apr 2. (http://www.ncbi.nlm.nih.gov/pubmed/16582910?dopt=Abstract)
  • Wong LJ, Brunetti-Pierri N, Zhang Q, Yazigi N, Bove KE, Dahms BB, Puchowicz MA, Gonzalez-Gomez I, Schmitt ES, Truong CK, Hoppel CL, Chou PC, Wang J, Baldwin EE, Adams D, Leslie N, Boles RG, Kerr DS, Craigen WJ. Mutations in the MPV17 gene are responsible for rapidly progressive liver failure in infancy. Hepatology. 2007 Oct;46(4):1218-27. Erratum in: Hepatology. 2008 Feb;47(2):768. (http://www.ncbi.nlm.nih.gov/pubmed/17694548?dopt=Abstract)

 

The resources on this site should not be used as a substitute for professional medical care or advice. Users seeking information about a personal genetic disease, syndrome, or condition should consult with a qualified healthcare professional. See How can I find a genetics professional in my area? (http://ghr.nlm.nih.gov/handbook/consult/findingprofessional) in the Handbook.

 
Reviewed: January 2013
Published: March 23, 2015