Use of a yeast-based membrane protein expression technology to overexpress drug resistance efflux pumps

Area of Science:

• Biochemistry
• Molecular Biology
• Mycology

Background:

• Azole antifungal drugs are crucial for treating oral fungal infections.
• Fungal resistance to azoles is a growing clinical challenge.
• Mechanisms of resistance include alterations in cytochrome P450 14alpha-lanosterol demethylase (CYP51) and multidrug efflux pumps.

Purpose of the Study:

• To establish a heterologous expression system for studying fungal membrane proteins.
• To investigate the structure and function of drug efflux pumps involved in azole resistance.
• To describe techniques for expressing the Candida albicans multidrug efflux pump Cdr1p in Saccharomyces cerevisiae.

Main Methods:

• Development of a heterologous membrane protein expression system.
• Utilizing Saccharomyces cerevisiae as a model organism.
• Cloning and expression of the Candida albicans Cdr1p efflux pump.

Main Results:

• Successfully established a system for expressing Cdr1p in Saccharomyces cerevisiae.
• Demonstrated the feasibility of studying fungal efflux pump function in a heterologous host.
• Provided detailed techniques for this expression system.

Conclusions:

• The developed heterologous expression system in Saccharomyces cerevisiae is effective for studying fungal efflux pumps like Cdr1p.
• This system facilitates research into mechanisms of azole antifungal drug resistance.
• Further studies can utilize this platform to explore structure-function relationships and develop new therapeutic strategies.