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Zeynaloo E, Zahran EM, Yang YP, Dikici E, Head T, Bachas LG, Daunert S. Reagentless electrochemical biosensors through incorporation of unnatural amino acids on the protein structure. Biosens Bioelectron 2022; 200:113861. [PMID: 34986438 PMCID: PMC9404255 DOI: 10.1016/j.bios.2021.113861] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 11/19/2021] [Accepted: 12/01/2021] [Indexed: 11/19/2022]
Abstract
Typical protein biosensors employ chemical or genetic labeling of the protein, thus introducing an extraneous molecule to the wild-type parent protein, often changing the overall structure and properties of the protein. While these labeling methods have proven successful in many cases, they also have a series of disadvantages associated with their preparation and function. An alternative route for labeling proteins is the incorporation of unnatural amino acid (UAA) analogues, capable of acting as a label, into the structure of a protein. Such an approach, while changing the local microenvironment, poses less of a burden on the overall structure of the protein. L-DOPA is an analog of phenylalanine and contains a catechol moiety that participates in a quasi-reversible, two-electron redox process, thus making it suitable as an electrochemical label/reporter. The periplasmic glucose/galactose binding protein (GBP) was chosen to demonstrate this detection principle. Upon glucose binding, GBP undergoes a significant conformational change that is manifested as a change in the electrochemistry of L-DOPA. The electroactive GBP was immobilized onto gold nanoparticle-modified, polymerized caffeic acid, screen-printed carbon electrodes (GBP-LDOPA/AuNP/PCA/SPCE) for the purpose of direct measurement of glucose levels and serves as a proof-of-concept of the use of electrochemically-active unnatural amino acids as the label. The resulting reagentless GBP biosensors exhibited a highly selective and sensitive binding affinity for glucose in the micromolar range, laying the foundation for a new biosensing methodology based on global incorporation of an electroactive amino acid into the protein's primary sequence for highly selective electrochemical detection of compounds of interest.
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Affiliation(s)
- Elnaz Zeynaloo
- Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, Miami, FL, 33136, United States; Department of Chemistry, University of Miami, Miami, FL, 33134, United States
| | - Elsayed M Zahran
- Department of Chemistry, Ball State University, Muncie, IN, 47306, United States
| | - Yu-Ping Yang
- Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, Miami, FL, 33136, United States; Dr. JT Macdonald Foundation Biomedical Nanotechnology Institute, University of Miami, Miami, FL, 33136, United States
| | - Emre Dikici
- Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, Miami, FL, 33136, United States; Dr. JT Macdonald Foundation Biomedical Nanotechnology Institute, University of Miami, Miami, FL, 33136, United States; Clinical and Translational Science Institute, University of Miami, Miami, FL, 33136, United States
| | - Trajen Head
- Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, Miami, FL, 33136, United States; Dr. JT Macdonald Foundation Biomedical Nanotechnology Institute, University of Miami, Miami, FL, 33136, United States
| | - Leonidas G Bachas
- Department of Chemistry, University of Miami, Miami, FL, 33134, United States; Dr. JT Macdonald Foundation Biomedical Nanotechnology Institute, University of Miami, Miami, FL, 33136, United States
| | - Sylvia Daunert
- Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, Miami, FL, 33136, United States; Dr. JT Macdonald Foundation Biomedical Nanotechnology Institute, University of Miami, Miami, FL, 33136, United States; Clinical and Translational Science Institute, University of Miami, Miami, FL, 33136, United States.
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Permana D, Minamihata K, Goto M, Kamiya N. Strategies for Making Multimeric and Polymeric Bifunctional Protein Conjugates and Their Applications as Bioanalytical Tools. ANAL SCI 2021; 37:425-437. [PMID: 33455962 DOI: 10.2116/analsci.20scr07] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Enzymes play a central role in the detection of target molecules in biotechnological fields. Most probes used in detection are bifunctional proteins comprising enzymes and binding proteins conjugated by chemical reactions. To create a highly sensitive detection probe, it is essential to increase the enzyme-to-binding protein ratio in the probe. However, if the chemical reactions required to prepare the probe are insufficiently site-specific, the detection probe may lose functionality. Genetic modifications and enzyme-mediated post-translational modifications (PTMs) can ensure the site-specific conjugation of proteins. They are therefore promising strategies for the production of detection probes with high enzyme contents, i.e., polymeric bifunctional proteins. Herein, we review recent advances in the preparation of bifunctional protein conjugates and polymeric bifunctional protein conjugates for detection. We have summarized research on genetically fused proteins and enzymatically prepared polymeric bifunctional proteins, and will discuss the potential use of protein polymers in various detection applications.
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Affiliation(s)
- Dani Permana
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University.,Research Unit for Clean Technology, Indonesian Institute of Sciences (LIPI), Kampus LIPI Bandung
| | - Kosuke Minamihata
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University
| | - Masahiro Goto
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University.,Division of Biotechnology, Center for Future Chemistry, Kyushu University
| | - Noriho Kamiya
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University.,Division of Biotechnology, Center for Future Chemistry, Kyushu University
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Wu R, Song H, Wang Y, Wang L, Zhu Z. Multienzyme co-immobilization-based bioelectrode: Design of principles and bioelectrochemical applications. Chin J Chem Eng 2020. [DOI: 10.1016/j.cjche.2020.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Liu H, Du Y, Gao J, Zhou L, He Y, Ma L, Liu G, Huang Z, Jiang Y. Compartmentalization of Biocatalysts by Immobilizing Bienzyme in Hollow ZIF-8 for Colorimetric Detection of Glucose and Phenol. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b04391] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Tintoré M, Mazzini S, Polito L, Marelli M, Latorre A, Somoza Á, Aviñó A, Fàbrega C, Eritja R. Gold-Coated Superparamagnetic Nanoparticles for Single Methyl Discrimination in DNA Aptamers. Int J Mol Sci 2015; 16:27625-39. [PMID: 26593913 PMCID: PMC4661904 DOI: 10.3390/ijms161126046] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 11/05/2015] [Accepted: 11/06/2015] [Indexed: 12/16/2022] Open
Abstract
Au- and iron-based magnetic nanoparticles (NPs) are promising NPs for biomedical applications due to their unique properties. The combination of a gold coating over a magnetic core puts together the benefits from adding the magnetic properties to the robust chemistry provided by the thiol functionalization of gold. Here, the use of Au-coated magnetic NPs for molecular detection of a single methylation in DNA aptamer is described. Binding of α-thrombin to two aptamers conjugated to these NPs causes aggregation, a phenomenon that can be observed by UV, DLS and MRI. These techniques discriminate a single methylation in one of the aptamers, preventing aggregation due to the inability of α-thrombin to recognize it. A parallel study with gold and ferromagnetic NPs is detailed, concluding that the Au coating of FexOy NP does not affect their performance and that they are suitable as complex biosensors. These results prove the high detection potency of Au-coated SPIONs for biomedical applications especially for DNA repair detection.
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Affiliation(s)
- Maria Tintoré
- Department of Chemical and Biomolecular Nanotechnology, IQAC-CSIC, CIBER-BBN Networking Centre on Bioengineering, Biomaterials and Nanomedicine, C/Jordi Girona 18-26, 08034 Barcelona, Spain.
| | - Stefania Mazzini
- Department of Food, Environmental and Nutritional Sciences (DEFENS), Division of Chemistry and Molecular Biology, University of Milan, Via Celoria 2, 20133 Milan, Italy.
| | - Laura Polito
- Department Institute of Molecular Science and Technologies, ISTM-CNR, Via G. Fantoli 16/15, 20138 Milan, Italy.
| | - Marcello Marelli
- Department Institute of Molecular Science and Technologies, ISTM-CNR, Via G. Fantoli 16/15, 20138 Milan, Italy.
| | - Alfonso Latorre
- IMDEA Nanociencia & Nanobiotecnología (IMDEA-Nanociencia), Asociada al Centro Nacional de Biotecnología (CSIC), C/Faraday 9, 28049 Madrid, Spain.
| | - Álvaro Somoza
- IMDEA Nanociencia & Nanobiotecnología (IMDEA-Nanociencia), Asociada al Centro Nacional de Biotecnología (CSIC), C/Faraday 9, 28049 Madrid, Spain.
| | - Anna Aviñó
- Department of Chemical and Biomolecular Nanotechnology, IQAC-CSIC, CIBER-BBN Networking Centre on Bioengineering, Biomaterials and Nanomedicine, C/Jordi Girona 18-26, 08034 Barcelona, Spain.
| | - Carme Fàbrega
- Department of Chemical and Biomolecular Nanotechnology, IQAC-CSIC, CIBER-BBN Networking Centre on Bioengineering, Biomaterials and Nanomedicine, C/Jordi Girona 18-26, 08034 Barcelona, Spain.
| | - Ramon Eritja
- Department of Chemical and Biomolecular Nanotechnology, IQAC-CSIC, CIBER-BBN Networking Centre on Bioengineering, Biomaterials and Nanomedicine, C/Jordi Girona 18-26, 08034 Barcelona, Spain.
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Sun QQ, Yu YN, Li JJ, Bao SJ. In situ growth of metallic silver on glucose oxidase for a highly sensitive glucose sensor. RSC Adv 2015. [DOI: 10.1039/c5ra00134j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A bio-composite was assembled by in situ reducing Ag+ to Ag in glucose oxidase solution and used to detect glucose.
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Affiliation(s)
- Qiang-Qiang Sun
- Institute for Clean Energy & Advanced Materials
- Faculty of Material & Energy
- Southwest University
- , P. R. China
| | - Ya-Nan Yu
- Institute for Clean Energy & Advanced Materials
- Faculty of Material & Energy
- Southwest University
- , P. R. China
| | - Jin-Jin Li
- Institute for Clean Energy & Advanced Materials
- Faculty of Material & Energy
- Southwest University
- , P. R. China
| | - Shu-Juan Bao
- Institute for Clean Energy & Advanced Materials
- Faculty of Material & Energy
- Southwest University
- , P. R. China
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