English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Complementation between polymerase- and exonuclease-deficient mitochondrial DNA polymerase mutants in genomically engineered flies

Bratic, A., Kauppila, T. E. S., Macao, B., Grönke, S., Siibak, T., Stewart, J. B., et al. (2015). Complementation between polymerase- and exonuclease-deficient mitochondrial DNA polymerase mutants in genomically engineered flies. Nat Commun, 6, 8808. doi:10.1038/ncomms9808.

Item is

Files

show Files

Locators

show
hide
Description:
-
OA-Status:
Not specified

Creators

show
hide
 Creators:
Bratic, A.1, Author           
Kauppila, T. E. S.1, Author           
Macao , B., Author
Grönke, S.2, Author           
Siibak, T., Author
Stewart, J. B.3, Author           
Baggio, F.1, Author           
Dols, J.2, Author           
Partridge, L.2, Author           
Falkenberg, M.1, Author           
Wredenberg, A.1, Author           
Larsson, N.G.1, Author           
Affiliations:
1Department Larsson - Mitochondrial Biology, Max Planck Institute for Biology of Ageing, Max Planck Society, ou_1942286              
2Department Partridge - Biological Mechanisms of Ageing, Max Planck Institute for Biology of Ageing, Max Planck Society, ou_1942287              
3Stewart – Mitochondrial Mutations and Genome Co-evolution, Research Groups, Max Planck Institute for Biology of Ageing, Max Planck Society, ou_1942301              

Content

show
hide
Free keywords: Animals DNA, Mitochondrial/*genetics DNA-Directed DNA Polymerase/genetics/*metabolism Drosophila/*genetics Exodeoxyribonucleases/genetics/*metabolism *Genetic Engineering Mutagenesis, Site-Directed Mutation Protein Subunits
 Abstract: Replication errors are the main cause of mitochondrial DNA (mtDNA) mutations and a compelling approach to decrease mutation levels would therefore be to increase the fidelity of the catalytic subunit (POLgammaA) of the mtDNA polymerase. Here we genomically engineer the tamas locus, encoding fly POLgammaA, and introduce alleles expressing exonuclease- (exo(-)) and polymerase-deficient (pol(-)) POLgammaA versions. The exo(-) mutant leads to accumulation of point mutations and linear deletions of mtDNA, whereas pol(-) mutants cause mtDNA depletion. The mutant tamas alleles are developmentally lethal but can complement each other in trans resulting in viable flies with clonally expanded mtDNA mutations. Reconstitution of human mtDNA replication in vitro confirms that replication is a highly dynamic process where POLgammaA goes on and off the template to allow complementation during proofreading and elongation. The created fly models are valuable tools to study germ line transmission of mtDNA and the pathophysiology of POLgammaA mutation disease.

Details

show
hide
Language(s):
 Dates: 2015
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1038/ncomms9808
ISSN: 2041-1723 (Electronic)2041-1723 (Linking)
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Nat Commun
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 6 Sequence Number: - Start / End Page: 8808 Identifier: -