Hybrid Nanoparticles Based on Organized Protein Immobilization on Fullerenes

• Published in: Bioconjugate chemistry Vol. 15; no. 1; pp. 12 - 15
• Main Authors: Nednoor, Pramod, Capaccio, Marcello, Gavalas, Vasilis G, Meier, Mark S, Anthony, John E, Bachas, Leonidas G
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 01-01-2004
• Subjects: Enzymes, Immobilized; Fullerenes - chemistry; Hydrogen-Ion Concentration; Microspheres; Nanotechnology; Protein Engineering; Proteins - chemistry; Subtilisin - chemistry; Surface Properties
• ISSN: 1043-1802; 1520-4812
• DOI: 10.1021/bc0341526

Nanoscale carbon materials (i.e., fullerenes and nanotubes) are an attractive platform for applications in biotransformations and biosensors. The interesting properties displayed by nanoparticles demand new strategies for the manipulation of these materials on the nanoscale. Controlled modification of their surface with biomolecules is required to fully realize their potential in bionanotechnology. In this work, immobilization of a fullerene derivative with a mutant subtilisin is demonstrated, and the effect of the fullerene on the protein activity is determined. The fullerene-conjugated enzyme had improved catalytic properties in comparison to subtilisin immobilized on nonporous silica. Further, the pH profile of free and fullerene-conjugated subtilisin were almost identical.