The involvement of the Saccharomyces cerevisiae multidrug resistance transporters Pdr5p and Snq2p in cation resistance.
The ATP-binding cassette superfamily proteins Pdr5p and Snq2p of Saccharomyces cerevisiae are implicated in multidrug resistance. Here, we show that these transporters are also involved in cation resistance. Null mutants of PDR5 and SNQ2 genes exhibit increased sensitivity to NaCl, LiCl and MnCl2. The mutant cells grown in the presence of high concentrations of these metal salts contain higher levels of the metals than wild-type cells. The expression of PDR5 and SNQ2 is induced by the metal salts. These results provide evidence that the yeast drug transporters contribute to cation resistance by regulating cellular cation homeostasis under ionic stress conditions.
Miyahara
K
K
Department of Fermentation Technology, Faculty of Engineering, Hiroshima University, Japan.
Mizunuma
M
M
Hirata
D
D
Tsuchiya
E
E
Miyakawa
T
T
D018528:ATP-Binding Cassette Transporters / Q000235:genetics / Q000378:metabolism*; D002412:Cations; D018432:Drug Resistance, Multiple; D005656:Fungal Proteins / Q000235:genetics / Q000378:metabolism*; D006706:Homeostasis; D008565:Membrane Proteins / Q000235:genetics / Q000378:metabolism*; D012441:Saccharomyces cerevisiae / Q000378:metabolism*; D029701:Saccharomyces cerevisiae Proteins
D018528:ATP-Binding Cassette Transporters; D002412:Cations; D005656:Fungal Proteins; D008565:Membrane Proteins; C092438:PDR5 protein, S cerevisiae; C101797:SNQ2 protein, S cerevisiae; D029701:Saccharomyces cerevisiae Proteins