Current Genetics

, Volume 19, Issue 6, pp 429–433

The SNQ3 gene of Saccharomyces cerevisiae confers hyper-resistance to several functionally unrelated chemicals

  • Karin Hertle
  • Eckard Haase
  • Martin Brendel
Original Articles


A multi-copy plasmid containing the SNQ3 gene confers hyper-resistance to 4-nitroquinoline-N-oxide (4NQO), Trenimon, MNNG, cycloheximide, and to sulfometuron methyl in yeast transformants. Restriction analysis, subcloning, and DNA sequencing revealed an open reading frame of 1950 bp on the SNQ3-containing insert DNA. Gene disruption and transplacement into chromosomal DNA yielded 4NQO-sensitive null mutants which were also more sensitive than the wild-type to Trenimon, cycloheximide, sulfometuron methyl, and MNNG. Hydropathic analysis showed that the SNQ3-encoded protein is most likely not membrane-bound, while the codon bias index points to low expression of the gene.

Key words

Mutagen hyper-resistance Yeast Base sequence Gene disruption 


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Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • Karin Hertle
    • 1
  • Eckard Haase
    • 1
  • Martin Brendel
    • 1
  1. 1.Institut für Mikrobiologie der J.W. Goethe-UniversitätFrankfurt am MainGermany

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