A nanocompartment system (Synthosome) designed for biotechnological applications

Area of Science:

• Biotechnology
• Materials Science
• Protein Engineering

Background:

• The FhuA protein, a large channel protein, possesses unique structural features making it suitable for biotechnological applications.
• Its monomeric structure, large pore diameter (39-46 Å), and solved crystallographic structure facilitate rapid compound flux.
• Developing advanced nanocompartment systems is crucial for enhancing biotechnological processes.

Purpose of the Study:

• To engineer a novel nanocompartment system for biotechnological applications.
• To demonstrate the feasibility of selective product recovery within these nanocompartments.
• To showcase enzymatic conversion capabilities within the developed system.

Main Methods:

• Utilized two deletion mutants of the FhuA protein (FhuA Δ1-129 and FhuA Δ1-160).
• Incorporated an ABA triblock copolymer (PMOXA-PDMS-PMOXA) to form the nanocompartment structure.
• Employed positively charged polylysine for selective recovery of negatively charged compounds (sulforhodamine B).
• Used horseradish peroxidase (HRP) for enzymatic conversion of 3,3',5,5'-tetramethylbenzidine.

Main Results:

• Successfully developed a nanocompartment system based on FhuA mutants and a triblock copolymer.
• Achieved selective recovery of negatively charged sulforhodamine B using polylysine as an internal trap.
• Demonstrated enzymatic conversion via horseradish peroxidase-catalyzed oxidation of 3,3',5,5'-tetramethylbenzidine within the nanocompartments.

Conclusions:

• The developed FhuA-based nanocompartment system shows significant potential for biotechnological applications.
• The system enables efficient and selective recovery of target compounds.
• The nanocompartments can host enzymatic reactions, broadening their utility in biocatalysis and bioprocessing.