Reference: Gracheva LM, et al. (1988) [Mutagenesis on cloned yeast genes. The mutation of the yeast gene comprising the plasmid and chromosome]. Genetika 24(7):1178-86

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Abstract


The cells of Saccharomyces cerevisiae were transformed by plasmid pYG-007 treated in vitro with o-methylhydroxylamine. The plasmid consists of a portion of the bacterial plasmid with genes of resistance to ampicillin, chloramphenicol and tetracycline, 2 mkm yeast DNA and yeast genes ADE2 and LEU2. The collection of mutants containing a mutant allele of ADE2 gene within the plasmid was obtained. Interallelic complementation and that induced by suppression were studied in these ade 2 mutants. It was shown that all these induced ade 2 mutations were base-pair substitutions. Using the mechanism of conversion we managed to transfer the plasmid ade 2 mutations into the chromosome. Three pairs of strains carrying similar mutation in plasmid and chromosome were created. Analysis of frequency of reversions induced by UV-light and hydroxylaminopurine in the mutant ade2 locus comprised in the plasmid and chromosome showed that the former induced reversions in plasmid alleles less effectively than the latter.

Reference Type
Journal Article
Authors
Gracheva LM, Kasinova GV, Korolev VG, Fedorova IV
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