Genetically Encoded Sensors for Monitoring Intracellular Redox Health of the Pathogenic Fungus Cryptococcus...

Area of Science:

• Mycology
• Molecular Biology
• Biochemistry

Background:

• Redox sensing and regulation are vital for pathogenic fungi like Cryptococcus neoformans to survive host immunity and establish infection.
• The specific genetic and biochemical mechanisms underlying redox regulation in fungal virulence remain largely unknown.

Purpose of the Study:

• To design and implement genetically encoded redox sensors for real-time monitoring of intracellular redox status in C. neoformans.
• To investigate the role of redox regulation in fungal survival and virulence.

Main Methods:

• Genetically encoded redox sensors were designed and optimized for expression in C. neoformans.
• Sensors were linked to cryptococcal redox proteins for real-time intracellular redox status monitoring.
• Fluorescence-based techniques were established to monitor dose-responsive changes in oxidation status under stress.

Main Results:

• Sensor responsiveness was demonstrated to peroxide stress and during different cell growth stages.
• Sensor functionality was verified in a mutant strain with known oxidative stress sensitivity.
• The developed sensors provide a framework for biosensor development in pathogenic fungi and basidiomycetes.

Conclusions:

• The study provides real-time insights into redox mechanisms governing the growth and survival of C. neoformans.
• The developed biosensor technology offers a valuable tool for future research in fungal molecular and synthetic biology.
• This work paves the way for tool development in other fungal species.