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Hjelm RME, Garcia KE, Babanova S, Artyushkova K, Matanovic I, Banta S, Atanassov P. Functional interfaces for biomimetic energy harvesting: CNTs-DNA matrix for enzyme assembly. Biochim Biophys Acta 2016; 1857:612-620. [PMID: 26751397 DOI: 10.1016/j.bbabio.2015.12.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 12/04/2015] [Accepted: 12/23/2015] [Indexed: 10/22/2022]
Abstract
The development of 3D structures exploring the properties of nano-materials and biological molecules has been shown through the years as an effective path forward for the design of advanced bio-nano architectures for enzymatic fuel cells, photo-bio energy harvesting devices, nano-biosensors and bio-actuators and other bio-nano-interfacial architectures. In this study we demonstrate a scaffold design utilizing carbon nanotubes, deoxyribose nucleic acid (DNA) and a specific DNA binding transcription factor that allows for directed immobilization of a single enzyme. Functionalized carbon nanotubes were covalently bonded to a diazonium salt modified gold surface through carbodiimide chemistry creating a brush-type nanotube alignment. The aligned nanotubes created a highly ordered structure with high surface area that allowed for the attachment of a protein assembly through a designed DNA scaffold. The enzyme immobilization was controlled by a zinc finger (ZNF) protein domain that binds to a specific dsDNA sequence. ZNF 268 was genetically fused to the small laccase (SLAC) from Streptomyces coelicolor, an enzyme belonging to the family of multi-copper oxidases, and used to demonstrate the applicability of the developed approach. Analytical techniques such as X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and enzymatic activity analysis, allowed characterization at each stage of development of the bio-nano architecture. This article is part of a Special Issue entitled Biodesign for Bioenergetics--the design and engineering of electronic transfer cofactors, proteins and protein networks, edited by Ronald L. Koder and J.L. Ross Anderson.
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Affiliation(s)
- Rachel M E Hjelm
- Nanoscience and Microsystems, MSC01 1120, 1 University of New Mexico, Albuquerque, NM 87131-0001, USA.
| | - Kristen E Garcia
- Department of Chemical Engineering, Columbia University, 500 W 120(th) St, New York City, NY 10027, USA.
| | - Sofia Babanova
- Department of Chemical and Biological Engineering, Farris Engineering Center 209, MSC01 1120, 1 University of New Mexico, Albuquerque, NM 87131-0001, USA.
| | - Kateryna Artyushkova
- Department of Chemical and Biological Engineering, Farris Engineering Center 209, MSC01 1120, 1 University of New Mexico, Albuquerque, NM 87131-0001, USA.
| | - Ivana Matanovic
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, United States.
| | - Scott Banta
- Department of Chemical Engineering, Columbia University, 500 W 120(th) St, New York City, NY 10027, USA.
| | - Plamen Atanassov
- Department of Chemical and Biological Engineering, Farris Engineering Center 209, MSC01 1120, 1 University of New Mexico, Albuquerque, NM 87131-0001, USA.
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