Abstract
None of the studied eukaryotic species has a natural system for homologous recombination of the mitochondrial genome. We propose an integrated genetic construct pQ-SRUS, which allows introduction of the recA gene from Bacillus subtilis into the nuclear genome of an extremophilic yeast, Yarrowia lipolytica. The targeting of recombinant RecA to the yeast mitochondria is provided by leader sequences (5′-UTR and 3′-UTR) derived from the SOD2 gene mRNA, which exhibits affinity to the outer mitochondrial membrane and thus provides cotranslational transport of RecA to the inner space of the mitochondria. The Y. lipolytica strain bearing the pQ-SRUS construct has the unique ability to integrate DNA constructs into the mitochondrial genome. This fact was confirmed using a tester construct, pQ-NIHN, intended for the introduction of the EYFP gene into the translation initiation region of the Y. lipolytica ND1 mitochondrial gene. The Y. lipolytica strain bearing pQ-SRUS makes it possible to engineer recombinant producers based on Y. lipolytica bearing transgenes in the mitochondrial genome. They are promising for the construction of a genetic system for in vivo replication and modification of the human mitochondrial genome. These strains may be used as a tool for the treatment of human mitochondrial diseases (including genetically inherited ones).
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Original Russian Text © E.P. Isakova, E.Yu. Epova, V.Yu. Sekova, E.V. Trubnikova, Yu.K. Kudykina, M.V. Zylkova, M.A. Guseva, Yu.I. Deryabina, 2015, published in Prikladnaya Biokhimiya i Mikrobiologiya, 2015, Vol. 51, No. 3, pp. 319–325.
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Isakova, E.P., Epova, E.Y., Sekova, V.Y. et al. The engineering of a Yarrowia lipolytica yeast strain capable of homologous recombination of the mitochondrial genome. Appl Biochem Microbiol 51, 336–341 (2015). https://doi.org/10.1134/S0003683815030096
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DOI: https://doi.org/10.1134/S0003683815030096