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• W2162783444 endingPage "56" @default.
• W2162783444 startingPage "43" @default.
• W2162783444 abstract "Using the homozygous diploid Saccharomyces deletion collection, we searched for strains with defects in K(+) homeostasis. We identified 156 (of 4653 total) strains unable to grow in the presence of hygromycin B, a phenotype previously shown to be indicative of ion defects. The most abundant group was that with deletions of genes known to encode membrane traffic regulators. Nearly 80% of these membrane traffic defective strains showed defects in uptake of the K(+) homolog, (86)Rb(+). Since Trk1, a plasma membrane protein localized to lipid microdomains, is the major K(+) influx transporter, we examined the subcellular localization and Triton-X 100 insolubility of Trk1 in 29 of the traffic mutants. However, few of these showed defects in the steady state levels of Trk1, the localization of Trk1 to the plasma membrane, or the localization of Trk1 to lipid microdomains, and most defects were mild compared to wild-type. Three inositol kinase mutants were also identified, and in contrast, loss of these genes negatively affected Trk1 protein levels. In summary, this work reveals a nexus between K(+) homeostasis and membrane traffic, which does not involve traffic of the major influx transporter, Trk1." @default.
• W2162783444 created "2016-06-24" @default.
• W2162783444 creator A5004582762 @default.
• W2162783444 creator A5024451170 @default.
• W2162783444 creator A5027726713 @default.
• W2162783444 creator A5055693877 @default.
• W2162783444 date "2011-06-01" @default.
• W2162783444 modified "2023-10-05" @default.
• W2162783444 title "Identification of Yeast Genes Involved in K⁺Homeostasis: Loss of Membrane Traffic Genes Affects K⁺Uptake" @default.
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