Evolution of β-lactamases and enzyme promiscuity

Area of Science:

• Biochemistry
• Evolutionary Biology
• Microbiology

Background:

• Beta-lactamases are a primary mechanism of resistance to beta-lactam antibiotics.
• These enzymes are significant models in enzymology and evolutionary biochemistry.
• Understanding beta-lactamase evolution and diversity benefits multiple scientific disciplines.

Purpose of the Study:

• To provide a comprehensive overview of beta-lactamase evolution.
• To explore the evolutionary origins and functional diversity of beta-lactamases.
• To highlight evolutionary connections between beta-lactamases and other enzymes.

Main Methods:

• Phylogenetic analysis of beta-lactamase superfamilies.
• Comparative analysis of protein sequences and structures.
• Identification of enzyme promiscuity and evolutionary links.

Main Results:

• Beta-lactamases have evolved independently multiple times from ancient, distinct evolutionary origins.
• Enzymes belong to two major superfamilies: penicillin-binding protein-like and metallo-beta-lactamase.
• Evidence suggests evolutionary connections and functional promiscuity with other enzyme families.

Conclusions:

• The ancient and recurrent evolution of beta-lactamases contributes to their structural and functional diversity.
• Phylogenetic insights reveal deep evolutionary roots and inter-enzyme relationships.
• Understanding these evolutionary pathways is key to combating antibiotic resistance and advancing enzymology.