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Published on: January 12, 2024
Reprogramming Cascade Catalysis via Protein-Directed Interfacial Assembly of Spatially Ordered Clusterzymes for
Fengjie Hao1, Juntao Hu1, Ziyu Kuai1
1Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University, Changchun 130012, China.
Researchers developed protein-based nanoparticles (proteinosomes) with precisely arranged gold clusterzymes for enhanced cascade catalysis. These nanoparticles effectively scavenge reactive oxygen species (ROS) in vivo, offering potential for treating ROS-related diseases.
Area of Science:
- Biomaterials Science
- Catalysis
- Nanotechnology
Background:
- Efficient enzymatic cascades require precise spatial arrangement of catalytic centers.
- Natural enzymes often face limitations in stability and tunability for industrial applications.
Purpose of the Study:
- To develop a protein-mediated self-assembly strategy for constructing proteinosomes with spatially arranged gold clusterzymes (AuNEs).
- To enhance multienzyme cascade catalysis and reactive oxygen species (ROS) scavenging capabilities.
Main Methods:
- Synthesized AuNEs within a cyclic SP1 protein scaffold engineered with a CCY peptide for controlled nucleation and growth.
- Utilized metal doping (Cu, Cd) to create distinct Au-CuNEs and Au-CdNEs with superoxide dismutase (SOD), glutathione peroxidase (GPx), and catalase (CAT)-like activities.
- Coassembled clusterzymes into size-tunable proteinosomes using electrostatic interactions with cetyltrimethylammonium bromide.
Main Results:
- Achieved dense catalytic packing and proximity-enhanced reactions within ordered proteinosomes.
- Demonstrated efficient cellular uptake of the proteinosomes.
- Observed significantly improved ROS scavenging in *Caenorhabditis elegans*.
Conclusions:
- Presented a spatially programmable platform for synergistic catalysis using proteinosome-based clusterzymes.
- Highlighted the potential of this approach for developing novel therapeutics for ROS-related diseases.
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