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Solubilization and characterization of the overexpressed PDR5 multidrug resistance nucleotide triphosphatase of yeast.

A 160-kDa plasma membrane protein of the yeast Saccharomyces cerevisiae was overexpressed by mutating the PDR1 or the PDR3 transcription factor gene. The protein is the membrane-bound ATP binding cassette transporter PDR5 (Balzi, E., Wang, M., Leterme, S., Van Dyck, L., and Goffeau, A. (1994) J. Biol. Chem. 269, 2206-2214). PDR5 was solubilized with n-dodecyl-beta-D-malto-side and separated from the PMA1 plasma membrane H(+)-ATPase by glycerol gradient centrifugation. The PDR5 protein hydrolyzes nucleoside diphosphates and triphosphates. This activity is sensitive to low concentrations of vanadate, of oligomycin, and of a variety of hydrophobic compounds. Many of these properties liken PDR5 to the purified mammalian P-glycoprotein responsible for multidrug resistance.[1]

References

  1. Solubilization and characterization of the overexpressed PDR5 multidrug resistance nucleotide triphosphatase of yeast. Decottignies, A., Kolaczkowski, M., Balzi, E., Goffeau, A. J. Biol. Chem. (1994) [Pubmed]
 
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