Active export proteins mediating drug resistance in staphylococci

Area of Science:

• Microbiology
• Molecular Biology
• Biochemistry

Background:

• Integral membrane transporters are crucial for cellular resistance to cytotoxic agents in all organisms.
• Gram-positive bacteria, lacking an outer membrane, rely on drug efflux systems to manage intracellular antimicrobial concentrations.
• Staphylococcal species, including Staphylococcus aureus, possess numerous drug exporters from five major bacterial transporter families.

Purpose of the Study:

• To provide a comprehensive review of active drug transporters in staphylococci.
• To highlight the role of these transporters in conferring resistance to various antimicrobial agents.
• To emphasize the importance of understanding transporter genetics and molecular properties for developing new treatments.

Main Methods:

• Review of existing literature on staphylococcal drug transporters.
• Analysis of transporter families and their mechanisms of action.
• Examination of genetic and molecular properties influencing drug resistance.

Main Results:

• Staphylococci encode a wide array of drug efflux transporters.
• Chromosomal and plasmid-encoded transporters contribute to significant drug resistance.
• These transporters confer resistance to antibiotics (macrolides, quinolones, tetracyclines, streptogramins) and biocides (quaternary ammonium compounds, biguanidines, diamidines).

Conclusions:

• Staphylococcal drug transporters are key mediators of resistance to diverse antimicrobial compounds.
• Understanding the genetic and molecular basis of these transporters is essential for combating staphylococcal infections.
• Targeting these efflux systems may offer novel therapeutic strategies against resistant strains.