Yeast ATP-binding cassette transporters: cellular cleaning pumps
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Updated: Aug 13, 2026

Applications of pHluorin for Quantitative, Kinetic and High-throughput Analysis of Endocytosis in Budding Yeast
Published on: October 23, 2016
Robert Ernst1, Robin Klemm, Lutz Schmitt
1Institute of Biochemistry, Membrane Transport Group, Heinrich-Heine University of Düsseldorf, Germany.
Abstract:
Numerous ATP-binding cassette (ABC) proteins have been implicated in multidrug resistance, and some are also intimately connected to genetic diseases. For example, mammalian ABC proteins such as P-glycoproteins or multidrug resistance-associated proteins are associated with multidrug resistance phenomena (MDR), thus hampering anticancer therapy. Likewise, homologues in bacteria, fungi, or parasites are tightly associated with multidrug and antibiotic resistance. Several orthologues of mammalian MDR genes operate in the unicellular eukaryote Saccharomyces cerevisiae. Their functions have been linked to stress response, cellular detoxification, and drug resistance. This chapter discusses those yeast ABC transporters implicated in pleiotropic drug resistance and cellular detoxification. We describe strategies for their overexpression, biochemical purification, functional analysis, and a reconstitution in phospholipid vesicles, all of which are instrumental to better understanding their mechanisms of action and perhaps their physiological function.
Insights
ATP-binding cassette (ABC) proteins are crucial for multidrug resistance and genetic diseases. This chapter explores yeast ABC transporters involved in drug resistance and detoxification, detailing methods for their study.
Area of Science:
- Biochemistry
- Molecular Biology
- Genetics
Background:
- ATP-binding cassette (ABC) proteins are implicated in multidrug resistance (MDR) and genetic disorders.
- Mammalian ABC proteins like P-glycoproteins contribute to MDR, hindering cancer therapy.
- Homologous ABC proteins in microbes and parasites are linked to multidrug and antibiotic resistance.
Purpose of the Study:
- To discuss yeast ABC transporters involved in pleiotropic drug resistance and cellular detoxification.
- To provide insights into the mechanisms of action and physiological functions of these yeast ABC transporters.
Main Methods:
- Overexpression strategies for yeast ABC transporters.
- Biochemical purification techniques.
- Functional analysis and reconstitution in phospholipid vesicles.
Main Results:
- Identification of yeast ABC transporters linked to pleiotropic drug resistance.
- Elucidation of their roles in cellular detoxification processes.
- Understanding of their mechanisms of action through functional studies.
Conclusions:
- Yeast ABC transporters play significant roles in drug resistance and detoxification.
- The described methodologies are essential for advancing the understanding of these proteins.
- Further research can leverage these techniques to explore physiological functions and potential therapeutic targets.
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