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Wang A, Barcus K, Cohen SM. Quantifying Ligand Binding to the Surface of Metal-Organic Frameworks. J Am Chem Soc 2023. [PMID: 37487227 PMCID: PMC10401703 DOI: 10.1021/jacs.3c04892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/26/2023]
Abstract
The binding of molecules to the exterior surface of metal-organic frameworks (MOFs) is not a well-understood phenomenon. Herein, the surface chemistry of three MOFs, UiO-66, MIL-88B-NH2, and ZIF-8, is investigated using dye-displacement experiments. MOF particle surfaces were modified with ligand-appended BODIPY dyes. The ability of the coordinated dyes to be displaced by a variety of exogenous ligands was measured by ultraviolet-visible spectroscopy. This method allowed for measurement of apparent binding constants for different ligands to the MOF surface. As might be expected, ligand affinity was dependent on the nature of the underlying metal-ligand composition of the MOF. This work provides a quantitative evaluation of ligand binding to MOF surfaces and important insights for the modulation, modification, and manipulation of MOFs.
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Affiliation(s)
- Austin Wang
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Kyle Barcus
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Seth M Cohen
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
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2
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Zhang J, Li Y, Duan S, He F. Highly electrically conductive two-dimensional Ti 3C 2 Mxenes-based 16S rDNA electrochemical sensor for detecting Mycobacterium tuberculosis. Anal Chim Acta 2020; 1123:9-17. [PMID: 32507244 DOI: 10.1016/j.aca.2020.05.013] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 04/14/2020] [Accepted: 05/04/2020] [Indexed: 12/15/2022]
Abstract
Tuberculosis is one of the life-threatening infectious diseases caused by the obligate pathogenic bacterium Mycobacterium tuberculosis (M. tuberculosis). The current M. tuberculosis detection approaches cannot satisfy the requirement for early clinical diagnosis because of long detection time as well as low specificity. In our study, an electrochemical M. tuberculosis sensor was constructed by using specific fragment of 16S rDNA of M. tuberculosis H37Ra as target biomarker, peptide nucleic acid (PNA) as capture probe and highly conductive two-dimensional Ti3C2 MXenes as the signal amplified transduction material. After the hybridization between PNA and the specific fragment of 16S rDNA on the substrate of PNA-AuNPs nanogap network electrode, the target fragments were directly linked with conductive Ti3C2 MXenes by strong interactions between zirconium-cross-linked Ti3C2 MXenes and phosphate groups of the target fragments. The linking of Ti3C2 MXenes to the hybridized target fragments would bridge the gaps of the interrupted AuNPs in the nanogap network electrode and forming the conductive connection to cause the change in conductance between the electrodes. This conductance change could be used for M. tuberculosis detection. The limit of detection (LOD) of proposed method was 20 CFU mL-1, and detection time was 2 h. Proposed method would find potential application in rapid detection of M. tuberculosis.
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Affiliation(s)
- Jialin Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China; Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, 341000, PR China
| | - Yao Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China
| | - Shaoyun Duan
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China
| | - Fengjiao He
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China.
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DNA markers and nano-biosensing approaches for tuberculosis diagnosis. NANOTECHNOLOGY BASED APPROACHES FOR TUBERCULOSIS TREATMENT 2020. [PMCID: PMC7303904 DOI: 10.1016/b978-0-12-819811-7.00013-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
According to WHO 2018 report, 10 million people developed tuberculosis and 1.3 million died from it making it 1 of 10 deadliest diseases worldwide. Tuberculosis is caused by infection with the bacillus Mycobacterium tuberculosis (Mtb). WHO recommends using a specific diagnostic kit Xpert MTB/RIF developed by Cepheid (California, United States). An alarming number of new cases (ca. 558,000) of rifampicin-resistant tuberculosis was diagnosticated in 2017. In recent years, new diagnosis tools targeting the Mtb DNA biomarkers have emerged using a plethora of nanomaterials capable of delivering new technological approaches for the rapid diagnostics of TB and rifampicin-resistant TB (RR-TB). In this chapter, we summarized the state-of-the-art of the current available DNA biomarkers and the potential applications for the development of new diagnosis nanotechnology-based devices. The latter use carbonaceous nanomaterials (graphene and carbon nanotubes), noble metals (silver and gold), semi-conducting (metal oxides, magnetic beads, and quantum dots) in order to reveal and/or to amplify the signal after the recognition of target DNA biomarker. The readout techniques such as colorimetry, fluorescence, surface plasmon resonance, and electrochemical methods were also reviewed. Future is bright for point-of-care diagnostics with a sample-in answer-out approach that hampers user-error through miniaturization of biochip technology to the nanoscale range, which will enable their use by nonspecialized personnel.
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Yushkova ED, Nazarova EA, Matyuhina AV, Noskova AO, Shavronskaya DO, Vinogradov VV, Skvortsova NN, Krivoshapkina EF. Application of Immobilized Enzymes in Food Industry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:11553-11567. [PMID: 31553885 DOI: 10.1021/acs.jafc.9b04385] [Citation(s) in RCA: 90] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Enzymes are macromolecular biocatalysts, widely used in food industry. In applications, enzymes are often immobilized on inert and insoluble carriers, which increase their efficiency due to multiple reusability. The properties of immobilized enzymes depend on the immobilization method and the carrier type. The choice of the carrier usually concerns the biocompatibility, chemical and thermal stability, insolubility under reaction conditions, capability of easy regeneration and reusability, as well as cost efficiency. In this review, we provide an overview of various carriers for enzyme immobilization, with the primary focus on food industry.
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Affiliation(s)
- Ekaterina D Yushkova
- ITMO University , Lomonosova Street 9 , 191002 St. Petersburg , Russian Federation
| | - Elena A Nazarova
- ITMO University , Lomonosova Street 9 , 191002 St. Petersburg , Russian Federation
| | - Anna V Matyuhina
- ITMO University , Lomonosova Street 9 , 191002 St. Petersburg , Russian Federation
| | - Alina O Noskova
- ITMO University , Lomonosova Street 9 , 191002 St. Petersburg , Russian Federation
| | - Darya O Shavronskaya
- ITMO University , Lomonosova Street 9 , 191002 St. Petersburg , Russian Federation
| | | | - Natalia N Skvortsova
- ITMO University , Lomonosova Street 9 , 191002 St. Petersburg , Russian Federation
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5
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Tang W, Chen C, Sun W, Wang P, Wei D. Low-cost mussel inspired poly(Catechol/Polyamine) modified magnetic nanoparticles as a versatile platform for enhanced activity of immobilized enzyme. Int J Biol Macromol 2019; 128:814-824. [PMID: 30708009 DOI: 10.1016/j.ijbiomac.2019.01.161] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 01/28/2019] [Accepted: 01/28/2019] [Indexed: 12/17/2022]
Abstract
Owing to dopamine's excellent adhesion ability and easy modification, it has been widely applied for enzyme immobilization, while the high cost of dopamine and low activity recovery of immobilized enzyme highly impede large-scale application of immobilized enzyme. We herein developed a low-cost and ideal activity recovery enzyme immobilization strategy based on magnetic nanoparticles by replacing dopamine with cheap Catechol/tetraethylene pentamine (CPA) binary system and introducing spacer-arms. In brief, CPA was first polymerized and deposited on the surface of magnetic nanoparticles with a modified mussel-inspired method, and the generated poly(CPA) layer was further functionalized with ethylene glycol diglycidyl ether (EGDE) molecules as spacer-arms for enzyme immobilization. Subsequently, lipases as model enzymes were firmly immobilized on the surface of such amino-epoxy functionalized magnetic materials through ion exchange and covalent attachment with 180.6 mg/g support of loading capacity and 69.2% of activity recovery under the optimized conditions. Furthermore, the immobilized lipase exhibited the improved tolerance rang of pH, temperature and storage stability as well as excellent reusability. Most strikingly, the theoretical simulation and secondary structure analysis of immobilized lipase revealed that the biocompatible microenvironment and flexible tethering at interface could effectively improve performance of the immobilized enzyme and stability. Thus, this novel immobilized enzyme strategy will open up a new perspective for the development of enzyme immobilization and lower the cost of immobilized enzyme in large-scale industrial application.
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Affiliation(s)
- Wen Tang
- State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, No. 130 Meilong Road, Shanghai 200237, People's Republic of China
| | - Chao Chen
- State Key Laboratory of Bioreactor Engineering, Biomedical Nanotechnology Center, School of Biotechnology, East China University of Science and Technology, Shanghai 200237, People's Republic of China.
| | - Wen Sun
- State Key Laboratory of Bioreactor Engineering, Biomedical Nanotechnology Center, School of Biotechnology, East China University of Science and Technology, Shanghai 200237, People's Republic of China
| | - Ping Wang
- State Key Laboratory of Bioreactor Engineering, Biomedical Nanotechnology Center, School of Biotechnology, East China University of Science and Technology, Shanghai 200237, People's Republic of China; Department of Bioproducts and Biosystems Engineering, University of Minnesota, St Paul, MN 55108, USA
| | - Dongzhi Wei
- State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, No. 130 Meilong Road, Shanghai 200237, People's Republic of China.
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6
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Hu X, Fagone P, Dong C, Su R, Xu Q, Dinu CZ. Biological Self-Assembly and Recognition Used to Synthesize and Surface Guide Next Generation of Hybrid Materials. ACS APPLIED MATERIALS & INTERFACES 2018; 10:28372-28381. [PMID: 29939708 DOI: 10.1021/acsami.8b09421] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Free-standing, high aspect ratio sulfur-doped carbon nanodot-based hybrid nanowires with a microtubular aspect were synthesized using self-recognition and self-assembly processes of tubulin, a biological molecule precursor of the cytoskeletal microtubule. Physicochemical characterizations (e.g., morphology, diameter, spectral characteristics, etc.) of such user-synthesized hybrid bionanowires were performed using classical atomic and spectroscopic techniques, whereas bioactivity and functionality testing was demonstrated by mimicking cellular transport based on kinesin, a motor protein capable to recognize, and move on the microtubules. Our results indicate that user-synthesized hybrid nanowires could be manipulated in vitro under constant chemical energy of adenosine triphosphate and have the potential to be implemented in the next generation of synthetic applications from drug delivery to diagnosis systems, and photocatalytic to optical devices.
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Affiliation(s)
| | | | | | - Rigu Su
- State Key Laboratory of Heavy Oil Processing , China University of Petroleum (Beijing) , Beijing 102249 , China
| | - Quan Xu
- State Key Laboratory of Heavy Oil Processing , China University of Petroleum (Beijing) , Beijing 102249 , China
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7
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Electrochemistry and electrocatalysis of myoglobin on electrodeposited ZrO2 and graphene-modified carbon ionic liquid electrode. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2015. [DOI: 10.1007/s13738-015-0740-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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8
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Kumar S, Kumar S, Tiwari S, Srivastava S, Srivastava M, Yadav BK, Kumar S, Tran TT, Dewan AK, Mulchandani A, Sharma JG, Maji S, Malhotra BD. Biofunctionalized Nanostructured Zirconia for Biomedical Application: A Smart Approach for Oral Cancer Detection. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2015; 2:1500048. [PMID: 27980963 PMCID: PMC5115417 DOI: 10.1002/advs.201500048] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 05/01/2015] [Indexed: 05/18/2023]
Abstract
Results of the studies are reported relating to application of the silanized nanostructured zirconia, electrophoretically deposited onto indium tin oxide (ITO) coated glass for covalent immobilization of the monoclonal antibodies (anti-CYFRA-21-1). This biosensing platform has been utilized for a simple, efficient, noninvasive, and label-free detection of oral cancer via cyclic voltammetry technique. The results of electrochemical response studies conducted on bovine serum albumin (BSA)/anti-CYFRA-21-1/3-aminopropyl triethoxy silane (APTES)/ZrO2/ITO immunoelectrode reveal that this immunoelectrode can be used to measure CYFRA-21-1 (oral cancer biomarker) concentration in saliva samples, with a high sensitivity of 2.2 mA mL ng-1, a linear detection range of 2-16 ng mL-1, and stability of six weeks. The results of these studies have been validated via enzyme-linked immunosorbent assay.
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Affiliation(s)
- Suveen Kumar
- Nanobioelectronics Laboratory Department of Biotechnology Delhi Technological University New Delhi 110042 India
| | - Saurabh Kumar
- Nanobioelectronics Laboratory Department of Biotechnology Delhi Technological University New Delhi 110042 India
| | - Sachchidanand Tiwari
- Nanobioelectronics Laboratory Department of Biotechnology Delhi Technological University New Delhi 110042 India
| | - Saurabh Srivastava
- Nanobioelectronics Laboratory Department of Biotechnology Delhi Technological University New Delhi 110042 India
| | - Manish Srivastava
- Department of Physics and Astrophysics University of Delhi New Delhi 110007 India
| | | | - Saroj Kumar
- Nanobioelectronics Laboratory Department of Biotechnology Delhi Technological University New Delhi 110042 India
| | - Thien Toan Tran
- Department of Chemical and Environmental Engineering University of California Riverside CA 92521 USA
| | - Ajay Kumar Dewan
- Rajiv Gandhi Cancer Institute and Research Centre Rohini New Delhi 110085 India
| | - Ashok Mulchandani
- Department of Chemical and Environmental Engineering University of California Riverside CA 92521 USA
| | - Jai Gopal Sharma
- Nanobioelectronics Laboratory Department of Biotechnology Delhi Technological University New Delhi 110042 India
| | - Sagar Maji
- Nanobioelectronics Laboratory Department of Biotechnology Delhi Technological University New Delhi 110042 India
| | - Bansi Dhar Malhotra
- Nanobioelectronics Laboratory Department of Biotechnology Delhi Technological University New Delhi 110042 India
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9
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10
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Treccani L, Yvonne Klein T, Meder F, Pardun K, Rezwan K. Functionalized ceramics for biomedical, biotechnological and environmental applications. Acta Biomater 2013; 9:7115-50. [PMID: 23567940 DOI: 10.1016/j.actbio.2013.03.036] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Revised: 03/21/2013] [Accepted: 03/23/2013] [Indexed: 12/12/2022]
Abstract
Surface functionalization has become of paramount importance and is considered a fundamental tool for the development and design of countless devices and engineered systems for key technological areas in biomedical, biotechnological and environmental applications. In this review, surface functionalization strategies for alumina, zirconia, titania, silica, iron oxide and calcium phosphate are presented and discussed. These materials have become particularly important concerning the aforementioned applications, being not only of great academic, but also of steadily increasing human and commercial, interest. In this review, special emphasis is given to their use as biomaterials, biosensors, biological targets, drug delivery systems, implants, chromatographic supports for biomolecule purification and analysis, and adsorbents for toxic substances and pollutants. The objective of this review is to provide a broad picture of the enormous possibilities offered by surface functionalization and to identify particular challenges regarding surface analysis and characterization.
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Affiliation(s)
- Laura Treccani
- University of Bremen, Advanced Ceramics, Am Biologischen Garten 2, 28359 Bremen, Germany.
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11
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Liu X, Chen X, Li Y, Wang X, Peng X, Zhu W. Preparation of superparamagnetic Fe3O4@alginate/chitosan nanospheres for Candida rugosa lipase immobilization and utilization of layer-by-layer assembly to enhance the stability of immobilized lipase. ACS APPLIED MATERIALS & INTERFACES 2012; 4:5169-5178. [PMID: 22985256 DOI: 10.1021/am301104c] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Superparamagnetic alginate nanospheres with diameter of 50 nm were prepared by self-assembly of alginate in the Ca(2+) solution; and then superparamagnetic alginate/chitosan nanospheres, which have positive charge and could adsorb lipase directly, were obtained with a following assembly of chitosan based on the electrostatic interaction between alginate and chitosan. Subsequently, oxidic poly (ethylene glycol) was used to functionalize the magnetic alginate/chitosan nanospheres. Thus, the magnetic nanospheres with aldehyde groups and a brushlike structure were formed. With various characterizations, it was verified that the magnetic alginate/chitosan nanospheres held small diameters (around 60 nm) and displayed superparamagnetism with high saturation magnetization. The Candida rugosa lipase (CRL), meanwhile, was immobilized onto the magnetic alginate/chitosan nanospheres by electrostatic adsorption and covalent bonding, respectively. Afterward, a layer-by-layer (LBL) assembly process was utilized to coat the immobilized CRL (ICRL) with covering layers made up of alginate and chitosan. After studying the properties of ICRL such as activity, kinetic behaviors, stability and reusability, it was proved that the ICRL prepared with two methods displayed more excellent properties than that prepared with electrostatic adsorption only. Additionally, coating ICRL with covering layers showed good effect on improving the stability of ICRL.
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Affiliation(s)
- Xiao Liu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Institute of Biochemical Engineering & Environmental Technology, Lanzhou University, Lanzhou 730000, China
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12
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Bellezza F, Alberani A, Posati T, Tarpani L, Latterini L, Cipiciani A. Protein interactions with nanosized hydrotalcites of different composition. J Inorg Biochem 2011; 106:134-42. [PMID: 22115829 DOI: 10.1016/j.jinorgbio.2011.10.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2011] [Revised: 09/09/2011] [Accepted: 10/03/2011] [Indexed: 11/29/2022]
Abstract
Nanosized hydrotalcite-like compounds (HTlc) with different chemical composition were prepared and used to study protein adsorption. Two soft proteins, myoglobin (Mb) and bovine serum albumin (BSA), were chosen to investigate the nature of the forces controlling the adsorption and how these depend on the chemical composition of the support. Both proteins strongly interact with HTlc exhibiting in most cases a Langmuir-type adsorption. Mb showed a higher affinity for Nickel Chromium (NiCr-HTlc) than for Nickel Aluminum (NiAl-HTlc), while for BSA no significant differences between supports were found. Adsorption experiments in the presence of additives showed that proteins exhibited different types of interactions onto the same HTlc surface and that the adsorption was strongly suppressed by the addition of disodium hydrogen phosphate (Na(2)HPO(4)). Atomic force microscopy images showed that the adsorption of both proteins onto nanoparticles was followed by the aggregation of biocomposites, with a more disordered structure for BSA. Fluorescence measurements for adsorbed Mb showed that the inorganic nanoparticles induced conformational changes in the biomolecules; in particular, the interactions with HTlc surface quenched the tryptophan fluorescence and this process was particularly efficient for NiCr-HTlc. The adsorption of BSA onto the HTlc nanoparticles induced a selective quenching of the exposed fluorescent residues, as indicated by the blue-shift of the emission spectra of tryptophan residues and by the shortening of the fluorescence decay times.
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TAO W, YANG L, XU G, QIAO Y, WU J. Immobilization of Lipase on Zirconium Nucleotide and Its Catalytic Performance. CHINESE JOURNAL OF CATALYSIS 2011. [DOI: 10.3724/sp.j.1088.2011.01129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Feichtenschlager B, Lomoschitz CJ, Kickelbick G. Tuning the self-assembled monolayer formation on nanoparticle surfaces with different curvatures: investigations on spherical silica particles and plane-crystal-shaped zirconia particles. J Colloid Interface Sci 2011; 360:15-25. [PMID: 21549385 PMCID: PMC3115058 DOI: 10.1016/j.jcis.2011.03.035] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2010] [Revised: 02/04/2011] [Accepted: 03/09/2011] [Indexed: 11/15/2022]
Abstract
The ordering of dodecyl-chain self-assembled monolayers (SAM) on different nanoscopic surfaces was investigated by FT-IR studies. As model systems plane-crystal-shaped ZrO(2) nanoparticles and spherical SiO(2) nanoparticles were examined. The type of capping agent was chosen dependent on the substrate, therefore dodecylphosphonic acid and octadecylphosphonic acid were used for ZrO(2) and dodecyltrimethoxysilane for SiO(2) samples. The plane ZrO(2) nanocrystals yielded more ordered alkyl-chain structures whereas spherical SiO(2) nanoparticles showed significantly lower alkyl-chain ordering. Submicron-sized silica spheres revealed a significantly higher alkyl chain ordering, comparable to an analogously prepared SAM on a non-curved plane oxidized Si-wafer. In the case of ZrO(2) nanocrystals an intense alkyl-chain alignment could be disturbed by decreasing the grafting density from the maximum of 2.1 molecules/nm(2) through the variation of coupling agent concentration to lower values. Furthermore, the co-adsorption of a different coupling agent, such as phenylphosphonic acid for ZrO(2) and phenyltrimethoxysilane for SiO(2), resulted in a significantly lower alkyl-chain ordering for ZrO(2) plane crystals and for large SiO(2) spherical particles at high grafting density. An increasing amount of order-disturbing molecules leads to a gradual decrease in alkyl-chain alignment on the surface of the inorganic nanoparticles. In the case of the ZrO(2) nanoparticle system it is shown via dynamic light scattering (DLS) that the mixed monolayer formation on the particle surface impacts the dispersion quality in organic solvents such as n-hexane.
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15
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Zhou F, Yuan L, Wang H, Li D, Chen H. Gold nanoparticle layer: a promising platform for ultra-sensitive cancer detection. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:2155-2158. [PMID: 21319767 DOI: 10.1021/la1049937] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Developing new technologies applicable to the sensitive detection of cancer in its early stages has always been attractive in diagnosis. A stable gold nanoparticle layer (GNPL)-modified high-binding ELISA plate was obtained via chemical plating and was proven to be more efficient in binding proteins while maintaining their activity. GNPL-based ELISA for the representative biomarker carcinoembryonic antigen (CEA) demonstrated that GNPL markedly amplified the ELISA signal and significantly improved the limit of detection (LOD). Antithrombin detection further confirms the effectiveness and universality of this GNPL-based platform. The entire assay procedure is simple and low in cost and does not require special facilities. All these virtues indicate that this GNPL platform holds great promise in clinical applications for the early diagnosis of cancer.
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Affiliation(s)
- Feng Zhou
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University , 199# Ren'ai Road, Suzhou 215123, P. R. China
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16
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Das M, Dhand C, Sumana G, Srivastava AK, Nagarajan R, Nain L, Iwamoto M, Manaka T, Malhotra BD. Electrophoretic fabrication of chitosan-zirconium-oxide nanobiocomposite platform for nucleic acid detection. Biomacromolecules 2011; 12:540-7. [PMID: 21218766 DOI: 10.1021/bm1013074] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The present work describes electrophoretic fabrication of nanostructured chitosan-zirconium-oxide composite (CHIT-NanoZrO(2)) film (180 nm) onto indium-tin-oxide (ITO)-coated glass plate. This nanobiocomposite film has been explored as immobilization platform for probe DNA specific to M. Tuberculosis as model biomolecule to investigate its sensing characteristics. It is revealed that pH-responsive behavior of CHIT and its cationic skeleton is responsible for the movement of CHIT-NanoZrO(2) colloids toward cathode during electrophoretic deposition. The FT-IR, SEM, TEM, and EDX techniques have been employed for the structural, morphological, and composition analysis of the fabricated electrodes. The morphological studies clearly reveal uniform inter-linking and dispersion of hexagonal nanograins of ZrO(2) (30-50 nm) into the chitosan matrix, resulting in homogeneous nanobiocomposite formation. Electrochemical response measurements of DNA/CHIT-NanoZrO(2)/ITO bioelectrode, carried out using cyclic voltammetry and differential pulse voltammetry, reveal that this bioelectrode can specifically detect complementary target DNA up to 0.00078 μM with sensitivity of 6.38 × 10(-6) AμM(-1).
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Affiliation(s)
- Maumita Das
- Department of Science & Technology Centre on Biomolecular Electronics, Biomedical Instrumentation Section, Materials Physics & Engineering Division, National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi-110012, India
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17
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Zirconia electrodeposited on a self-assembled monolayer on a gold electrode for sensitive determination of parathion. Mikrochim Acta 2010. [DOI: 10.1007/s00604-010-0483-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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18
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Bellezza F, Cipiciani A, Latterini L, Posati T, Sassi P. Structure and catalytic behavior of myoglobin adsorbed onto nanosized hydrotalcites. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:10918-10924. [PMID: 19735144 DOI: 10.1021/la901448a] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The adsorption of myoglobin (Mb) onto nanosized nickel aluminum hydrotalcite (NiAl-HTlc) surface was studied, and the structural properties of the resulting protein layer were analyzed by using FT-IR, Raman, and fluorescence spectroscopies. Upon adsorption onto the nanoparticle surface, the protein molecules maintained their secondary structure, while the tertiary structure was altered. The fluorescence spectra and anisotropy values of adsorbed Mb revealed that the emitting amino acid residues are affected by different microenvironments when compared to the native protein behavior. Moreover, the decrease of fluorescence decay times of tryptophan indicated the occurrence of interactions among the fluorophores and the constituents of the nanoparticles, such as the metal cations, which can take place when conformational changes of Mb occur. Raman spectra indicated that the interaction of Mb molecules with NiAl-HTlc nanoparticles modified the porphyrin core, changing the spin state of the heme iron from high spin (HS) to low spin (LS). The enzymatic activity of the nanostructured biocomposite was evaluated in the oxidation of 2-methoxyphenol by hydrogen peroxide and discussed on the basis of structural properties of adsorbed myoglobin.
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Affiliation(s)
- Francesca Bellezza
- Dipartimento di Chimica, Università di Perugia, via Elce di Sotto, 8, 06123 Perugia, Italy
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Sima V, Cristea C, Lăpăduş F, Marian I, Marian A, Săndulescu R. Electroanalytical properties of a novel biosensor modified with zirconium alcoxide porous gels for the detection of acetaminophen. J Pharm Biomed Anal 2008; 48:1195-200. [DOI: 10.1016/j.jpba.2008.08.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2008] [Revised: 07/28/2008] [Accepted: 08/03/2008] [Indexed: 10/21/2022]
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20
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Chen YZ, Yang CT, Ching CB, Xu R. Immobilization of lipases on hydrophobilized zirconia nanoparticles: highly enantioselective and reusable biocatalysts. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:8877-84. [PMID: 18656972 DOI: 10.1021/la801384c] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Our study has demonstrated for the first time that zirconia nanoparticles modified by a simple carboxylic surfactant of a very long alkyl chain can significantly enhance the activity of the immobilized lipases for asymmetric synthesis in organic media. Zirconia nanoparticles of ca. 20 nm diameter were grafted with carboxylic surfactant modifiers from Tween 85 and erucic acid. The surface of nanoparticles was successfully changed from hydrophilic to hydrophobic. Lipases from Candida rugosa and Pseudomonas cepacia were immobilized on the modified zirconia nanoparticles by adsorption in aqueous solution. The immobilized lipases were used for the resolution of ( R, S)-ibuprofen and ( R, S)-1-phenylethanol through esterification and acylation, respectively, in isooctane organic solvent. When immobilized on erucic acid-modified zirconia, both lipases gave significantly higher activity and enantioselectivity compared with those from their corresponding crude lipase powders. The nanohybrid biocatalysts are stable and can be reused for eight cycles without loss in activity and selectivity. The interaction between the hydrophobic surface of zirconia support and lipases probably induces the conformational rearrangement of lipases into an active, stable form.
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Affiliation(s)
- Yi Zhao Chen
- Division of Chemical & Biomolecular Engineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore
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21
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Baldrian P, Merhautová V, Cajthaml T, Nerud F, Stopka P, Gorbacheva O, Hrubý M, Benes MJ. Synthesis of zirconia-immobilized copper chelates for catalytic decomposition of hydrogen peroxide and the oxidation of polycyclic aromatic hydrocarbons. CHEMOSPHERE 2008; 72:1721-1726. [PMID: 18555507 DOI: 10.1016/j.chemosphere.2008.04.068] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2007] [Revised: 04/23/2008] [Accepted: 04/24/2008] [Indexed: 05/26/2023]
Abstract
Chelating sorbents with diethylenetriaminepenta(methylene-phosphonic acid) (DTPMPA) and ethylenediaminetetraacetic acid ligands immobilized on zirconia matrix were prepared and subsequently saturated with Cu(II). All the Cu chelates catalyzed decomposition of H(2)O(2) yielding highly reactive hydroxyl radicals. All of them were also able to catalyze degradation of polycyclic aromatic hydrocarbons (anthracene, benzo[a]pyrene and benzo[b]fluoranthene). The most effective DTPMPA-based catalysts G-32 and G-35 (10 mg ml(-1) with 100 mmol H(2)O(2)) caused almost complete decomposition of 15 ppm anthracene and benzo[a]pyrene during a five day catalytic cycle at 30 degrees C. Anthracene-1,4-dione was the main product of anthracene oxidation by all catalysts. The catalysts were active in several cycles without regeneration.
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Affiliation(s)
- Petr Baldrian
- Institute of Microbiology of the ASCR, v.v.i., Vídenská 1083, 14220 Prague 4, Czech Republic.
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22
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Rahal R, Daniele S, Hubert-Pfalzgraf LG, Guyot-Ferréol V, Tranchant JF. Synthesis ofpara-Amino Benzoic Acid–TiO2 Hybrid Nanostructures of Controlled Functionality by an Aqueous One-Step Process. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200700971] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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23
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Bellezza F, Cipiciani A, Quotadamo MA, Cinelli S, Onori G, Tacchi S. Structure, stability, and activity of myoglobin adsorbed onto phosphate-grafted zirconia nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:13007-13012. [PMID: 18020378 DOI: 10.1021/la7015269] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The adsorption of myoglobin (Mb) onto phosphate grafted-zirconia (ZrO2-P) nanoparticles was studied in terms of conformational studies and thermal stability, determined by circular dichroism (CD), differential scanning calorimetry (DSC), and atomic force microscopy (AFM). The changes in protein structure have been correlated with the catalytic activity of free and adsorbed Mb. CD and DSC studies indicate marked rearrangements in Mb structure upon adsorption onto phosphate-grafted zirconia nanoparticles. These structural rearrangements of Mb could be responsible for the loss of catalytic activity observed for the adsorbed Mb. In particular, the conformational changes due to the adsorption process induced a reduction of kcat and KM. AFM measurements indicate that the interaction with the grafted-zirconia nanoparticles also affects the morphology of the bound protein, inducing the nucleation of prefibrillar-like aggregates.
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Affiliation(s)
- Francesca Bellezza
- Centro di Eccellenza Materiali Innovativi Nanostrutturati (CEMIN), Dipartimento di Chimica, Università di Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
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24
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Shi X, Liu J, Li C, Yang Q. Pore-Size Tunable Mesoporous Zirconium Organophosphonates with Chiral l-Proline for Enzyme Adsorption. Inorg Chem 2007; 46:7944-52. [PMID: 17696427 DOI: 10.1021/ic700892z] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Mesoporous zirconium organophosphonates with a tunable mesopore (pore diameter: from 4.8 to 16.3 nm) were synthesized through co-condensation of ZrCl4 and 1-phosphomethylproline (H3PMP) with the aid of organic additives in the presence of an anionic surfactant (sodium dodecyl sulfate) under weak acidic conditions. The organic additives, tetrahydrofuran, can effectively strengthen the assembly of ZrCl4 and H3PMP around the surfactant micelles through decreasing the hydrolysis and condensation rate of ZrCl4. The results of the N2 sorption isotherm and SEM image show that zirconium phosphate with a bimodal structure is formed by calcination of mesoporous zirconium organophosphonate. Mesoporous zirconium organophosphonates can effectively adsorb lysozyme (Lz) and papain, and the adsorption equilibrium for Lz can be reached within 30 min. The adsorption capacity for Lz and papain can reach as high as 438 and 297 mg/g, respectively. Furthermore, Lz adsorbed on mesoporous zirconium organophosphonates can retain its structural conformation as in its free state, and no leaching of Lz from the solid was observed when shaking the Lz-loaded solid in a buffer solution. Also, the existence of L-proline in the mesopore could help the adsorption of papain at a pH value lower than the pI of papain.
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Affiliation(s)
- Xin Shi
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
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25
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Hong J, Xu D, Gong P, Ma H, Dong L, Yao S. Conjugation of enzyme on superparamagnetic nanogels covered with carboxyl groups. J Chromatogr B Analyt Technol Biomed Life Sci 2007; 850:499-506. [PMID: 17241826 DOI: 10.1016/j.jchromb.2006.12.035] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2006] [Revised: 12/19/2006] [Accepted: 12/20/2006] [Indexed: 10/23/2022]
Abstract
Alpha-chymotrypsin (CT) as model enzyme was conjugated onto the novel carboxyl-functionalized superparamagnetic nanogels, prepared via facile photochemical in situ polymerization, by using 1-ethyl-3-(3-dimethylaminepropyl) carbodiimide (EDC) as coupling reagent. The obtained magnetic immobilized enzyme was characterized by use of photo correlation spectroscopy (PCS), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) measurement, thermogravimetric (TG) analysis and vibrating sample magnetometer (VSM) measurement. PCS result showed that the immobilized enzyme was 68 nm in diameter while the magnetic nanogels with carboxyl groups were only 38 nm; enzyme immobilization led to pronounced change in size. Superparamagnetic properties were retained for Fe3O4 after enzyme immobilization while slightly reducing its value of saturation magnetization. Immobilization and surface coating did not induce phase change of Fe3O4 by XRD analysis. The binding capacity was 30 mg enzyme/g and 37.5 mg enzyme/g nanogel determined by TG analysis and BCA protein assay, respectively. Specific activity of the immobilized CT was calculated to be 0.77 U/(mg min), 82.7% as that of the free form.
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Affiliation(s)
- Jun Hong
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, PR China
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27
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Fan Y, Chen X, Kong J, Tung CH, Gao Z. Direct Detection of Nucleic Acids by Tagging Phosphates on Their Backbones with Conductive Nanoparticles. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200603605] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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28
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Fan Y, Chen X, Kong J, Tung CH, Gao Z. Direct Detection of Nucleic Acids by Tagging Phosphates on Their Backbones with Conductive Nanoparticles. Angew Chem Int Ed Engl 2007; 46:2051-4. [PMID: 17290474 DOI: 10.1002/anie.200603605] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yi Fan
- Institute of Microelectronics, 11 Science Park Road, Singapore 117685, Singapore
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29
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Tong Z, Yuan R, Chai Y, Chen S, Xie Y. Direct electrochemistry of horseradish peroxidase immobilized on DNA/electrodeposited zirconium dioxide modified, gold disk electrode. Biotechnol Lett 2007; 29:791-5. [PMID: 17295085 DOI: 10.1007/s10529-007-9319-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2006] [Revised: 12/22/2006] [Accepted: 01/02/2007] [Indexed: 02/06/2023]
Abstract
A novel H(2)O(2) biosensor is described which is based on immobilization of horseradish peroxidase (HRP) on DNA/electrodeposited, ZrO(2)/modified, gold electrode. The DNA is attached via its 5' end to ZrO(2) and this provides a microenvironment for the immobilization of various biomolecules and promotes electron transfer between HRP and the electrode surface. Under optimized conditions, the biosensor reduced H(2)O(2) linearly between 3.5 microM and 10 mM with a detection limit of 0.8 microM at a signal-to-noise ratio of 3. In addition, the developed biosensor shows an acceptable stability and repeatability. Importantly, the analytical methodology could be further developed for the immobilization of other proteins and biocompounds.
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Affiliation(s)
- Zhongqiang Tong
- Chongqing Key Laboratory of Analytical Chemistry, College of Chemistry and Engineering, Southwest University, Chongqing, 400715, PR China
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Bellezza F, Cipiciani A, Costantino U, Marmottini F. Adsorption of myoglobin onto porous zirconium phosphate and zirconium benzenephosphonate obtained with template synthesis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:5064-9. [PMID: 16700595 DOI: 10.1021/la0531897] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Porous zirconium phosphate (P-ZrP) and zirconium benzenephosphonate (P-ZrBP) were prepared in the presence of an anionic surfactant acting as a template. Poorly crystalline materials with a P/Zr molar ratio equal to 2 and having a relatively high surface area and micro/mesoporosity have been obtained. The interaction of myoglobin with the two types of surfaces, the hydrophobic P-ZrBP and the hydrophilic P-ZrP, was investigated, and the adsorption isotherms were determined at different pH and temperature values. A model was proposed for the mechanism of the interaction of the protein with the surface based on the shape of the adsorption isotherm and the physical-chemical properties of myoglobin. The pH has been found to be an important parameter for determining the maximum adsorption capacity of P-ZrBP and P-ZrP for myoglobin molecules because of the changes that occur in the type and net charge of the protein surface as the pH of the medium changes. Protein binding affinity and capacity increase when the temperature is increased. This phenomenon occurs because myoglobin varies its conformation at high temperature with an increase in the exposed hydrophobic region. This process causes a stronger hydrophobic interaction between the protein and the adsorbent and reduces the repulsion between the adsorbed molecules. Studies on the activities of the obtained biocomposites are in progress.
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Affiliation(s)
- Francesca Bellezza
- Dipartimento di Chimica and Centro di Eccellenza Materiali Innovativi Nanostrutturati (CEMIN), Università di Perugia, via Elce di Sotto 8, 06123 Perugia, Italy
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