PDR-like ABC systems in pathogenic fungi.

Area of Science:

• Biochemistry
• Molecular Biology
• Mycology

Background:

• Pleiotropic Drug Resistance (PDR) transporters are critical for antifungal resistance in pathogenic fungi.
• The exact transport mechanism of PDR transporters remains poorly understood.
• PDR transporters exhibit asymmetry, featuring one catalytic and one non-catalytic nucleotide-binding site.

Purpose of the Study:

• To elucidate the role of the non-catalytic nucleotide-binding site in PDR transporter function.
• To investigate the mechanism of drug transport mediated by PDR transporters.
• To address the mystery surrounding the existence and function of non-catalytic binding sites in PDR transporters.

Main Methods:

• Review of recent publications on PDR transporter structure and function.
• Analysis of biochemical data related to nucleotide-binding sites.
• Comparative studies of catalytic and non-catalytic site involvement in drug transport.

Main Results:

• The so-called "deviant" or non-catalytic site plays a crucial role in drug transport.
• Evidence suggests this site is essential for the overall function of PDR transporters.
• Findings contribute to understanding the asymmetry and functional mechanisms of PDR transporters.

Conclusions:

• The non-catalytic nucleotide-binding site is not merely structural but functionally significant for drug transport.
• Understanding this site is a key step in unraveling the complete transport mechanism of PDR transporters.
• This research opens new avenues for targeting PDR transporters to combat antifungal resistance.