title: Gene SNQ2 of Saccharomyces cerevisiae, which confers resistance to 4-nitroquinoline-N-oxide and other chemicals, encodes a 169 kDa protein homologous to ATP-dependent permeases.
abstract: The yeast gene SNQ2 confers hyper-resistance to the mutagens 4-nitroquinoline-N-oxide (4-NQO) and Triaziquone, as well as to the chemicals sulphomethuron methyl and phenanthroline when present in multiple copies in transformants of Saccharomyces cerevisiae. Subcloning and sequencing of a 5.5 kb yeast DNA fragment revealed that SNQ2 has an open reading frame of 4.5 kb. The putative encoded polypeptide of 1501 amino acids has a predicted molecular weight of 169 kDa and has several hydrophobic regions. Northern analysis showed a transcript of 5.5 kb. Haploid cells with a disrupted SNQ2 reading frame are viable. The SNQ2-encoded protein has domains believed to be involved in ATP binding and is likely to be membrane associated. It most probably serves as an ATP-dependent permease.
authors.affiliation: Institut für Mikrobiologie, J.W. Goethe-Universität, Frankfurt/Main, FRG.
authors.forename: J
authors.initials: J
authors.lastname: Servos
authors.forename: E
authors.initials: E
authors.lastname: Haase
authors.forename: M
authors.initials: M
authors.lastname: Brendel
mesh_terms: D015112:4-Nitroquinoline-1-oxide / Q000494:pharmacology*; D018528:ATP-Binding Cassette Transporters / Q000235:genetics*; D000255:Adenosine Triphosphate / Q000494:pharmacology*; D000595:Amino Acid Sequence; D003001:Cloning, Molecular; D004352:Drug Resistance, Microbial; D005800:Genes, Fungal / Q000235:genetics*; D026901:Membrane Transport Proteins / Q000187:drug effects / Q000235:genetics*; D008969:Molecular Sequence Data; D011487:Protein Conformation; D012441:Saccharomyces cerevisiae / Q000235:genetics*; D029701:Saccharomyces cerevisiae Proteins; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D012995:Solubility; D014170:Transformation, Genetic
chemical_list: D018528:ATP-Binding Cassette Transporters; D026901:Membrane Transport Proteins; C101797:SNQ2 protein, S cerevisiae; D029701:Saccharomyces cerevisiae Proteins; D015112:4-Nitroquinoline-1-oxide; D000255:Adenosine Triphosphate