title: Facile co-assembly process to generate core-shell nanoparticles with functional protein corona.
abstract: A simple and robust protocol to maintain the structural feature of polymer-protein core-shell nanoparticles (PPCS-NPs) is developed based on the synergistic interactions between proteins and functional polymers. Using the self-assembly method, a broad range of proteins can be assembled to the selective water-insoluble polymers containing pyridine groups. The detailed analysis of the PPCS-NPs structure was conducted using FESEM and thin-sectioned TEM. The results illustrated that the protein molecules are located on the corona of the PPCS-NPs. While proteins are displacing between water and polymer to minimize the interfacial energy, the polymer offers a unique microenvironment to maintain protein structure and conformation. The proposed mechanism is based on a fine balance between hydrophobicity and hydrophilicity, as well as hydrogen bonding between proteins and polymer. The PPCS-NPs can serve as a scaffold to incorporate both glucose oxidase (GOX) and horseradish peroxidase (HRP) onto a single particle. Such a GOX-HRP bienzymatic system showed a ~20% increase in activity in comparison to the mixed free enzymes. Our method therefore provides a unique platform to preserve protein structure and conformation and can be extended to a number of biomolecules.
authors: Department of Chemistry and Biochemistry, University of South Carolina , Columbia, South Carolina 29208, United States.
authors: Nisaraporn
authors: N
authors: Suthiwangcharoen
authors: Tao
authors: T
authors: Li
authors: Laying
authors: L
authors: Wu
authors: Heidi B
authors: HB
authors: Reno
authors: Preston
authors: P
authors: Thompson
authors: Qian
authors: Q
authors: Wang
mesh_terms: D005949:Glucose Oxidase / Q000737:chemistry; D006735:Horseradish Peroxidase / Q000737:chemistry; D006860:Hydrogen Bonding; D057927:Hydrophobic and Hydrophilic Interactions; D008968:Molecular Conformation; D053758:Nanoparticles / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D011506:Proteins / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D011108:Polymers; D011506:Proteins; D014867:Water; D005949:Glucose Oxidase; D006735:Horseradish Peroxidase