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Article
Block copolymer-quantum dot micelles for multienzyme colocalization
Langmuir
  • Feng Jia, Iowa State University
  • Yanjie Zhang, Iowa State University
  • Balaji Narasimhan, Iowa State University
  • Surya K. Mallapragada, Iowa State University
Document Type
Article
Publication Date
1-1-2012
DOI
10.1021/la303115t
Abstract

To mimic the structure and functionality of multienzyme complexes, which are widely present in Nature, Pluronic-based micelles were designed to colocalize multiple enzymes. To stabilize the micelles as well as to enable characterization of single enzyme immobilization and multienzyme colocalization by Förster resonance energy transfer (FRET), quantum dots (QDs) were incorporated into the micelles to form Pluronic-QD micelles using a novel microreactor. Model enzymes glucose oxidase (GOX) and horseradish peroxidase (HRP) were respectively labeled with fluorescent dyes. The results indicated that FRET occurred between the QDs and dyes that labeled each type of enzyme in single enzyme immobilization studies as well as between the dyes in colocalization studies. These observations were consistent with increases in micelle size after adsorption of dye-enzymes as verified by dynamic light scattering. In addition, the activity of single enzymes was retained after immobilization. An optimized colocalization process improved the overall conversion rate by approximately 100% compared to equivalent concentrations of free enzymes in solution. This study demonstrates a versatile platform for multienzyme colocalization and an effective strategy to characterize multienzyme immobilization and colocalization, which can be applicable to many other multienzyme systems.

Comments

Reprinted (adapted) with permission from Langmuir, 28 (2012), pp.17389-17395, doi: 10.1021/la303115t .Copyright 2012 American Chemical Society.

Copyright Owner
American Chemical Society
Language
en
Date Available
2014-12-08
File Format
application/pdf
Citation Information
Feng Jia, Yanjie Zhang, Balaji Narasimhan and Surya K. Mallapragada. "Block copolymer-quantum dot micelles for multienzyme colocalization" Langmuir Vol. 28 Iss. 50 (2012) p. 17389 - 17395
Available at: http://works.bepress.com/balaji_narasimhan/8/