Enzymatic Polymerization of PCL-PEG Co-polymers for Biomedical Applications

• Published in: Frontiers in Molecular Biosciences
• Main Authors: Figueiredo, Pedro, Almeida, Beatriz C., Carvalho, Alexandra T. P.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Frontiers Media S.A. 2019
• Subjects: MD calculations; QM/MM MD simulations; PCL-PEG co-polymers; biodegradable polymers; ROP; Antarc*; Antarctica
• Online Access: http://hdl.handle.net/10316/106963; https://doi.org/10.3389/fmolb.2019.00109

Biodegradable polymers, obtained via chemical synthesis, are currently employed in a wide range of biomedical applications. However, enzymatic polymerization is an attractive alternative because it is more sustainable and safer. Many lipases can be employed in ring-opening polymerization (ROP) of biodegradable polymers. Nevertheless, the harsh conditions required in industrial context are not always compatible with their enzymatic activity. In this work, we have studied a thermophilic carboxylesterase and the commonly used Lipase B from Candida antarctica (CaLB) for tailored synthesis of amphiphilic polyesters for biomedical applications. We have conducted Molecular Dynamics (MD) and Quantum Mechanics/Molecular Mechanics (QM/MM) MD simulations of the synthesis of Polycaprolactone-Polyethylene Glycol (PCL-PEG) model co-polymers. Our insights about the reaction mechanisms are important for the design of customized enzymes capable to synthesize different polyesters for biomedical applications.