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Org Biomol Chem. 2010 Feb 21;8(4):782-7. doi: 10.1039/b916773k. Epub 2009 Dec 23.

Site-selective immobilisation of functional enzymes on to polystyrene nanoparticles.

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School of Chemistry and Manchester Interdisciplinary Biocentre, The University of Manchester, 131 Princess Street, Manchester, UKM1 7DN.


The immobilisation of proteins on to nanoparticles has a number of applications ranging from biocatalysis through to cellular delivery of biopharmaceuticals. Here we describe a phosphopantetheinyl transferase (Sfp)-catalysed method for immobilising proteins bearing a small 12-mer "ybbR" tag on to nanoparticles functionalised with coenzyme A. The Sfp-catalysed immobilisation of proteins on to nanoparticles is a highly efficient, single step reaction that proceeds under mild conditions and results in a homogeneous population of proteins that are covalently and site-specifically attached to the surface of the nanoparticles. Several enzymes of interest for biocatalysis, including an arylmalonate decarboxylase (AMDase) and a glutamate racemase (GluR), were immobilised on to nanoparticles using this approach. These enzymes retained their activity and showed high operational stability upon immobilisation.

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