Lethal Interaction of Nuclear and Mitochondrial Genotypes in Drosophila melanogaster

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Salminen , T S , Cannino , G , Oliveira , M T , Lillsunde , P , Jacobs , H T & Kaguni , L S 2019 , ' Lethal Interaction of Nuclear and Mitochondrial Genotypes in Drosophila melanogaster ' , G3 - Genes genomes genetics , vol. 9 , no. 7 , pp. 2225-2234 . https://doi.org/10.1534/g3.119.400315

Title: Lethal Interaction of Nuclear and Mitochondrial Genotypes in Drosophila melanogaster
Author: Salminen, Tiina S.; Cannino, Giuseppe; Oliveira, Marcos T.; Lillsunde, Päivi; Jacobs, Howard T.; Kaguni, Laurie S.
Other contributor: University of Helsinki, Doctoral Programme in Integrative Life Science

Date: 2019-07
Language: eng
Number of pages: 10
Belongs to series: G3 - Genes genomes genetics
ISSN: 2160-1836
DOI: https://doi.org/10.1534/g3.119.400315
URI: http://hdl.handle.net/10138/305408
Abstract: Drosophila melanogaster, like most animal species, displays considerable genetic variation in both nuclear and mitochondrial DNA (mtDNA). Here we tested whether any of four natural mtDNA variants was able to modify the effect of the phenotypically mild, nuclear tko(25t) mutation, affecting mitochondrial protein synthesis. When combined with tko(25t), the mtDNA from wild strain KSA2 produced pupal lethality, accompanied by the presence of melanotic nodules in L3 larvae. KSA2 mtDNA, which carries a substitution at a conserved residue of cytochrome b that is predicted to be involved in subunit interactions within respiratory complex III, conferred drastically decreased respiratory capacity and complex III activity in the tko(25t) but not a wild-type nuclear background. The complex III inhibitor antimycin A was able to phenocopy effects of the tko(25t) mutation in the KSA2 mtDNA background. This is the first report of a lethal, nuclear-mitochondrial interaction within a metazoan species, representing a paradigm for understanding genetic interactions between nuclear and mitochondrial genotype relevant to human health and disease.
Subject: cybrid
respiration
cytochrome b
mtDNA copy number
melanotic nodules
CYTOPLASMIC MALE-STERILITY
INCOMPATIBILITY
PHENOTYPE
MUTATION
DNA
RESISTANCE
DISEASE
LOCUS
MODEL
REPLACEMENT
1184 Genetics, developmental biology, physiology
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