Exploring the substrate spectrum of phylogenetically distinct bacterial polyesterases

Area of Science:

• Biotechnology
• Environmental Science
• Microbiology

Background:

• Plastic waste accumulation is a global environmental crisis.
• Enzymatic degradation using microbial hydrolases offers a sustainable solution.
• Mixed plastic waste complicates recycling efforts.

Purpose of the Study:

• Investigate four bacterial polyesterases for plastic degradation.
• Characterize and structurally analyze enzymes for their degradation abilities.
• Identify enzymes with broad substrate specificity for mixed plastic waste.

Main Methods:

• Biochemical characterization of four bacterial polyesterases.
• Structural analysis of the enzymes.
• Assessing degradation of various synthetic polyesters.

Main Results:

• All four enzymes demonstrated synthetic plastic degradation.
• Se1JFR showed significant degradation of PBS, PLA, and polyether PU.
• Se1JFR exhibited comparable performance to IsPETase in degrading PCL and PET.

Conclusions:

• Bacterial hydrolases possess a wide substrate spectrum for polyester degradation.
• PETase-like enzymes hold significant potential for addressing plastic pollution.
• Enzyme-based solutions can enhance plastic recyclability.