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Reference: Fox TD, et al. (1988) Plasmids can stably transform yeast mitochondria lacking endogenous mtDNA. Proc Natl Acad Sci U S A 85(19):7288-92

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Abstract


The mitochondrial gene oxi1, carried on a bacterial plasmid, has been used to transform the mitochondria of a yeast strain lacking mtDNA (rho0). The plasmid DNA behaved in a manner entirely consistent with the known properties of normal yeast rho- mtDNA after its introduction by high-velocity microprojectile bombardment. Like the mtDNA sequences retained in natural rho- strains, the plasmid DNA in the transformants was reiterated into concatemers whose size was indistinguishable from that of wild-type mtDNA. The oxi1 sequences in the transformants were surrounded by restriction sites derived from the plasmid that were not present in wild-type mtDNA. oxi1 genetic information in these "synthetic rho-" strains could be expressed in diploids either after "marker rescue" by recombination with rho+ mtDNA carrying an appropriate oxi1 point mutation or in trans during the growth of diploids heteroplasmic for both the plasmid-derived oxi1 sequences and rho+ mtDNA with oxi1 deleted. The ability to generate such "synthetic rho-" strains by transformation will allow transfer of mutations generated in vitro to wild-type rho+ mtDNA as well as examination of the function of altered genes in trans.

Reference Type
Journal Article | Research Support, U.S. Gov't, P.H.S.
Authors
Fox TD, Sanford JC, McMullin TW
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