The mitochondrial genomes of spontaneous orir petite mutants of yeast have rearranged repeat units organized as inverted tandem dimers |
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Authors: | G Faugeron-Fonty M Mangin A Huyard G Bernardi |
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Institution: | Laboratoire de Génétique Moléculaire, Institut Jacques Monod, 2 Place Jussieu, 75005 ParisFrance Tel. (1) 329-58-24 or (1) 336-25-25, ext. 41.01 |
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Abstract: | We have investigated the structure and organization of the mitochondrial genomes of two related orir (ori-rearranged) spontaneous petite mutants of Saccharomyces cerevisiae. In these mutant genomes every repeat unit contains an inverted terminal duplication harboring a second (inverted) ori sequence, and tandem pairs of repeat units alternate with tandem pairs in inverted orientation. We have shown that orir genomes are organized as the genomes with inverted repeat units of ethidium bromide (EtBr)-induced petites, and we have clarified the mechanism by which such mutant mitochondrial genomes arise. |
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Keywords: | excision sequences recombination genome rearrangements bp base pairs EtBr ethidium bromide on origin of replication see INTRODUCTION |
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