Submitted Successfully!
Thank you for your contribution! You can also upload a video entry or images related to this topic.
Ver. Summary Created by Modification Content Size Created at Operation
1 + 407 word(s) 407 2020-12-15 08:12:39

Video Upload Options

Do you have a full video?

Confirm

Are you sure to Delete?
Cite
If you have any further questions, please contact Encyclopedia Editorial Office.
Liu, R. TMEM70 Gene. Encyclopedia. Available online: https://encyclopedia.pub/entry/5768 (accessed on 05 December 2023).
Liu R. TMEM70 Gene. Encyclopedia. Available at: https://encyclopedia.pub/entry/5768. Accessed December 05, 2023.
Liu, Rui. "TMEM70 Gene" Encyclopedia, https://encyclopedia.pub/entry/5768 (accessed December 05, 2023).
Liu, R.(2020, December 25). TMEM70 Gene. In Encyclopedia. https://encyclopedia.pub/entry/5768
Liu, Rui. "TMEM70 Gene." Encyclopedia. Web. 25 December, 2020.
TMEM70 Gene
Edit

Transmembrane protein 70: The TMEM70 gene provides instructions for making a protein called transmembrane protein 70.

genes

1. Normal Function

The TMEM70 gene provides instructions for making a protein called transmembrane protein 70. This protein is found in cell structures called mitochondria, which convert the energy from food into a form that cells can use. Transmembrane protein 70 is thought to play an important role in assembling and stabilizing a group of proteins called complex V. Complex V is the last of five complexes that carry out a multistep process called oxidative phosphorylation, through which cells derive much of their energy. Complex V is involved in the final step of oxidative phosphorylation. Specifically, one segment of complex V allows positively charged particles, called protons, to flow across a specialized membrane inside mitochondria. Another segment of complex V uses the energy created by this proton flow to convert a molecule called adenosine diphosphate (ADP) to adenosine triphosphate (ATP), which is used by the cell as energy.

Transmembrane protein 70 is also thought to be involved in the assembly of complex I, which is the first mitochondrial complex involved in oxidative phosphorylation.

2. Health Conditions Related to Genetic Changes

2.1. Mitochondrial complex V deficiency

At least 12 mutations in the TMEM70 gene have been identified in people who have mitochondrial complex V deficiency, a disorder with a wide variety of signs and symptoms. A few of these gene mutations are particular to people of Roma or Arab descent, and account for the majority of mitochondrial complex V deficiency cases caused by TMEM70 gene mutations. This disorder can also be caused by mutations in other genes.

The signs and symptoms of mitochondrial complex V deficiency are most prominent in organs and tissues that require a large amount of energy, such as the brain and heart. Abnormal brain function (encephalopathy) and other neurological problems can occur. Another common feature of mitochondrial complex V deficiency, especially when caused by TMEM70 gene mutations, is hypertrophic cardiomyopathy. This condition is characterized by thickening (hypertrophy) of the heart (cardiac) muscle that can lead to heart failure. TMEM70 gene mutations alter transmembrane protein 70 and impair its ability to perform its function in complex V assembly. As a result, the amount of complex V in cells is reduced. The resulting impairment of oxidative phosphorylation and energy production leads to the signs and symptoms of mitochondrial complex V deficiency.

3. Other Names for This Gene

  • FLJ20533
  • MC5DN2
  • transmembrane protein 70, mitochondrial isoform a
  • transmembrane protein 70, mitochondrial isoform b

References

  1. Diodato D, Invernizzi F, Lamantea E, Fagiolari G, Parini R, Menni F, ParentiG, Bollani L, Pasquini E, Donati MA, Cassandrini D, Santorelli FM, Haack TB,Prokisch H, Ghezzi D, Lamperti C, Zeviani M. Common and Novel TMEM70 Mutations ina Cohort of Italian Patients with Mitochondrial Encephalocardiomyopathy. JIMDRep. 2015;15:71-8. doi: 10.1007/8904_2014_300.
  2. Guerrero-Castillo S, Baertling F, Kownatzki D, Wessels HJ, Arnold S, Brandt U,Nijtmans L. The Assembly Pathway of Mitochondrial Respiratory Chain Complex I.Cell Metab. 2017 Jan 10;25(1):128-139. doi: 10.1016/j.cmet.2016.09.002.
  3. Hejzlarová K, Mráček T, Vrbacký M, Kaplanová V, Karbanová V, Nůsková H, PecinaP, Houštěk J. Nuclear genetic defects of mitochondrial ATP synthase. Physiol Res.2014;63(Suppl 1):S57-71. Review.
  4. Magner M, Dvorakova V, Tesarova M, Mazurova S, Hansikova H, Zahorec M,Brennerova K, Bzduch V, Spiegel R, Horovitz Y, Mandel H, Eminoğlu FT, Mayr JA,Koch J, Martinelli D, Bertini E, Konstantopoulou V, Smet J, Rahman S, Broomfield A, Stojanović V, Dionisi-Vici C, van Coster R, Morava E, Sperl W, Zeman J, HonzikT. TMEM70 deficiency: long-term outcome of 48 patients. J Inherit Metab Dis. 2015May;38(3):417-26. doi: 10.1007/s10545-014-9774-8.Inherit Metab Dis. 2015 May;38(3):583-4. Morava-Kozicz, Eva [corrected to Morava,Eva].
  5. Spiegel R, Khayat M, Shalev SA, Horovitz Y, Mandel H, Hershkovitz E, Barghuti F, Shaag A, Saada A, Korman SH, Elpeleg O, Yatsiv I. TMEM70 mutations are acommon cause of nuclear encoded ATP synthase assembly defect: further delineationof a new syndrome. J Med Genet. 2011 Mar;48(3):177-82. doi:10.1136/jmg.2010.084608.
  6. Torraco A, Verrigni D, Rizza T, Meschini MC, Vazquez-Memije ME, Martinelli D, Bianchi M, Piemonte F, Dionisi-Vici C, Santorelli FM, Bertini E, Carrozzo R.TMEM70: a mutational hot spot in nuclear ATP synthase deficiency with a pivotalrole in complex V biogenesis. Neurogenetics. 2012 Nov;13(4):375-86. doi:10.1007/s10048-012-0343-8.
More
Information
Contributor MDPI registered users' name will be linked to their SciProfiles pages. To register with us, please refer to https://encyclopedia.pub/register :
View Times: 236
Entry Collection: MedlinePlus
Revision: 1 time (View History)
Update Date: 25 Dec 2020
1000/1000