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
    • Institut für Mikrobiologie der J.W. Goethe-Universität
  • Eckard Haase
    • Institut für Mikrobiologie der J.W. Goethe-Universität
  • Martin Brendel
    • Institut für Mikrobiologie der J.W. Goethe-Universität
Original Articles

DOI: 10.1007/BF00312733

Cite this article as:
Hertle, K., Haase, E. & Brendel, M. Curr Genet (1991) 19: 429. doi:10.1007/BF00312733


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-resistanceYeastBase sequenceGene disruption

Copyright information

© Springer-Verlag 1991