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Liu Y, Chen Z, Wang Z, Lv Y. Boosted Enzyme Activity via Encapsulation within Metal-Organic Frameworks with Pores Matching Enzyme Size and Shape. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2309243. [PMID: 38576185 DOI: 10.1002/advs.202309243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 02/21/2024] [Indexed: 04/06/2024]
Abstract
A novel and versatile approach called "physical imprinting" is introduced to modulate enzyme conformation using mesoporous materials, addressing challenges in achieving improved enzyme activity and stability. Metal-organic frameworks with tailored mesopores, precisely matching enzyme size and shape, are synthesized. Remarkably, enzymes encapsulated within these customized mesopores exhibit over 1670% relative activity compared to free enzymes, maintaining outstanding efficiency even under harsh conditions such as heat, exposure to organic solvents, wide-ranging pH extremes from acidic to alkaline, and exposure to a digestion cocktail. After 18 consecutive cycles of use, the immobilized enzymes retain 80% of their initial activity. Additionally, the encapsulated enzymes exhibit a substantial increase in catalytic efficiency, with a 14.1-fold enhancement in kcat/KM compared to native enzymes. This enhancement is among the highest reported for immobilized enzymes. The improved enzyme activity and stability are corroborated by solid-state UV-vis, electron paramagnetic resonance, Fourier-transform infrared spectroscopy, and solid-state NMR spectroscopy. The findings not only offer valuable insights into the crucial role of size and shape complementarity within confined microenvironments but also establish a new pathway for developing solid carriers capable of enhancing enzyme activity and stability.
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Affiliation(s)
- Ying Liu
- State Key Laboratory of Organic-Inorganic Composites, National Energy Research and Development Center for Biorefinery, International Joint Bioenergy Laboratory of Ministry of Education, Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Ziman Chen
- State Key Laboratory of Organic-Inorganic Composites, National Energy Research and Development Center for Biorefinery, International Joint Bioenergy Laboratory of Ministry of Education, Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Zheng Wang
- State Key Laboratory of Organic-Inorganic Composites, National Energy Research and Development Center for Biorefinery, International Joint Bioenergy Laboratory of Ministry of Education, Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Yongqin Lv
- State Key Laboratory of Organic-Inorganic Composites, National Energy Research and Development Center for Biorefinery, International Joint Bioenergy Laboratory of Ministry of Education, Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, China
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2
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Yang Y, Wang Q, Li G, Guo W, Yang Z, Liu H, Deng X. Cysteine-Derived Chiral Carbon Quantum Dots: A Fibrinolytic Activity Regulator for Plasmin to Target the Human Islet Amyloid Polypeptide for Type 2 Diabetes Mellitus. ACS APPLIED MATERIALS & INTERFACES 2023; 15:2617-2629. [PMID: 36596222 DOI: 10.1021/acsami.2c17975] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The fibrillization and deposition of the human islet amyloid polypeptide (hIAPP) are the pathological hallmark of type 2 diabetes mellitus (T2DM), and these insoluble fibrotic depositions of hIAPP are considered to strongly affect insulin secretion by inducing toxicity toward pancreatic islet β-cells. The current strategy of preventing amyloid aggregation by nanoparticle-assisted inhibitors can only disassemble fibrotic amyloids into more toxic oligomers and/or protofibrils. Herein, for the first time, we propose a type of cysteine-derived chiral carbon quantum dot (CQD) that targets plasmin, a core natural fibrinolytic protease in humans. These CQDs can serve as fibrinolytic activity regulators for plasmin to cleave hIAPP into nontoxic polypeptides or into even smaller amino acid fragments, thus alleviating hIAPP's fibrotic amyloid-induced cytotoxicity. Our experiments indicate that chiral CQDs have opposing effects on plasmin activity. The l-CQDs promote the cleavage of hIAPP by enhancing plasmin activity at a promotion ratio of 23.2%, thus protecting β-cells from amyloid-induced toxicity. In contrast, the resultant d-CQDs significantly inhibit proteolysis, decreasing plasmin activity by 31.5% under the same reaction conditions. Second harmonic generation (SHG) microscopic imaging is initially used to dynamically characterize hIAPP before and after proteolysis. The l-CQD promotion of plasmin activity thus provides a promising avenue for the hIAPP-targeted treatment of T2DM to treat low fibrinolytic activity, while the d-CQDs, as inhibitors of plasmin activity, may improve patient survival for hyperfibrinolytic conditions, such as those existing during surgeries and traumas.
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Affiliation(s)
- Yongzhen Yang
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou510631, China
- Guangdong Provincial Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou510631, China
- Guangzhou Key Laboratory of Spectral Analysis and Functional Probes, College of Biophotonics, South China Normal University, Guangzhou510631, China
| | - Qin Wang
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou510631, China
- Guangdong Provincial Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou510631, China
- Guangzhou Key Laboratory of Spectral Analysis and Functional Probes, College of Biophotonics, South China Normal University, Guangzhou510631, China
| | - Gongjian Li
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou510631, China
- Guangdong Provincial Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou510631, China
- Guangzhou Key Laboratory of Spectral Analysis and Functional Probes, College of Biophotonics, South China Normal University, Guangzhou510631, China
| | - Wenjing Guo
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou510530, China
| | - Zuojun Yang
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou510631, China
- Guangdong Provincial Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou510631, China
- Guangzhou Key Laboratory of Spectral Analysis and Functional Probes, College of Biophotonics, South China Normal University, Guangzhou510631, China
| | - Hao Liu
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou510631, China
- Guangdong Provincial Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou510631, China
- Guangzhou Key Laboratory of Spectral Analysis and Functional Probes, College of Biophotonics, South China Normal University, Guangzhou510631, China
| | - Xiaoyuan Deng
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou510631, China
- Guangdong Provincial Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou510631, China
- Guangzhou Key Laboratory of Spectral Analysis and Functional Probes, College of Biophotonics, South China Normal University, Guangzhou510631, China
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Liang J, Bin Zulkifli MY, Yong J, Du Z, Ao Z, Rawal A, Scott JA, Harmer JR, Wang J, Liang K. Locking the Ultrasound-Induced Active Conformation of Metalloenzymes in Metal-Organic Frameworks. J Am Chem Soc 2022; 144:17865-17875. [PMID: 36075889 DOI: 10.1021/jacs.2c06471] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Enhancing the enzymatic activity inside metal-organic frameworks (MOFs) is a critical challenge in chemical technology and bio-technology, which, if addressed, will broaden their scope in energy, food, environmental, and pharmaceutical industries. Here, we report a simple yet versatile and effective strategy to optimize biocatalytic activity by using MOFs to rapidly "lock" the ultrasound (US)-activated but more fragile conformation of metalloenzymes. The results demonstrate that up to 5.3-fold and 9.3-fold biocatalytic activity enhancement of the free and MOF-immobilized enzymes could be achieved compared to those without US pretreatment, respectively. Using horseradish peroxidase as a model, molecular dynamics simulation demonstrates that the improved activity of the enzyme is driven by an opened gate conformation of the heme active site, which allows more efficient substrate binding to the enzyme. The intact heme active site is confirmed by solid-state UV-vis and electron paramagnetic resonance, while the US-induced enzyme conformation change is confirmed by circular dichroism spectroscopy and Fourier-transform infrared spectroscopy. In addition, the improved activity of the biocomposites does not compromise their stability upon heating or exposure to organic solvent and a digestion cocktail. This rapid locking and immobilization strategy of the US-induced active enzyme conformation in MOFs gives rise to new possibilities for the exploitation of highly efficient biocatalysts for diverse applications.
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Affiliation(s)
- Jieying Liang
- School of Chemical Engineering and Australian Centre for NanoMedicine, The University of New South Wales, Sydney 2052, New South Wale, Australia
| | - Muhammad Yazid Bin Zulkifli
- School of Chemical Engineering and Australian Centre for NanoMedicine, The University of New South Wales, Sydney 2052, New South Wale, Australia
| | - Joel Yong
- School of Chemical Engineering and Australian Centre for NanoMedicine, The University of New South Wales, Sydney 2052, New South Wale, Australia.,Graduate School of Biomedical Engineering, The University of New South Wales, Sydney 2052, New South Wale, Australia
| | - Zeping Du
- School of Chemical Engineering and Australian Centre for NanoMedicine, The University of New South Wales, Sydney 2052, New South Wale, Australia
| | - Zhimin Ao
- Advanced Interdisciplinary Institute of Environment and Ecology, Beijing Normal University, Zhuhai, 519087, China
| | - Aditya Rawal
- Nuclear Magnetic Resonance Facility, Mark Wainwright Analytical Centre, University of New South Wales, Sydney 2052, New South Wale Australia
| | - Jason A Scott
- School of Chemical Engineering and Australian Centre for NanoMedicine, The University of New South Wales, Sydney 2052, New South Wale, Australia
| | - Jeffrey R Harmer
- Centre for Advanced Imaging, The University of Queensland, Brisbane 4072, Queensland Australia
| | - Joseph Wang
- Department of Nanoengineering, University of California San Diego, La Jolla 92093, California, United States
| | - Kang Liang
- School of Chemical Engineering and Australian Centre for NanoMedicine, The University of New South Wales, Sydney 2052, New South Wale, Australia.,Graduate School of Biomedical Engineering, The University of New South Wales, Sydney 2052, New South Wale, Australia
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4
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Immobilization of Cytochrome C by Benzoic Acid (BA)-Functional UiO-66-NO 2 and the Enzyme Activity Assay. Appl Biochem Biotechnol 2022; 194:5167-5184. [PMID: 35699801 DOI: 10.1007/s12010-022-04018-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/27/2022] [Indexed: 11/02/2022]
Abstract
Recently, metal-organic frameworks (MOFs) are considered to be the moderate hosts for the bio-enzymes owing to their unique 3D pores and controllable surface affinity to the target molecules. In this work, the benzoic acid (BA)-modulated UiO-66-NO2 was introduced, and cytochrome c (Cyt C) was chosen as the target enzyme to evaluate the immobilization efficiency of the resulting UiO-66-NO2-BA. The immobilization conditions including pH, adsorption time, and temperature and the initial concentrations of BA were optimized. The adsorption kinetics and thermodynamics were analyzed to further explore the enhanced adsorption mechanism. It is worth noted that all the UiO-66-NO2-BA exhibited evidently enhanced adsorption capacities in comparison with the unmodified UiO-66-NO2 due to the formation of the chemical bonds between the UiO-66-NO2-BA and cytochrome C, indicating the positive roles of BA modification. Finally, the activities of the immobilized cytochrome C were assessed by using the catalytic oxidation of ABTS in the presence of H2O2, which reactions were also conducted over the free cytochrome C for comparison. The evidently improved stability under definite pH range, prolonged durability against the organic solvents, and the good reusability of the immobilized cytochrome C highlight the prospect applications of functional MOF immobilized enzymes in the practical catalytic reactions.
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Chalmpes N, Patila M, Kouloumpis A, Alatzoglou C, Spyrou K, Subrati M, Polydera AC, Bourlinos AB, Stamatis H, Gournis D. Graphene Oxide-Cytochrome c Multilayered Structures for Biocatalytic Applications: Decrypting the Role of Surfactant in Langmuir-Schaefer Layer Deposition. ACS APPLIED MATERIALS & INTERFACES 2022; 14:26204-26215. [PMID: 35608556 DOI: 10.1021/acsami.2c03944] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Graphene, a two-dimensional single-layer carbon allotrope, has attracted tremendous scientific interest due to its outstanding physicochemical properties. Its monatomic thickness, high specific surface area, and chemical stability render it an ideal building block for the development of well-ordered layered nanostructures with tailored properties. Herein, biohybrid graphene-based layer-by-layer structures are prepared by means of conventional and surfactant-assisted Langmuir-Schaefer layer deposition techniques, whereby cytochrome c molecules are accommodated within ordered layers of graphene oxide. The biocatalytic activity of the as-developed nanobio-architectures toward the enzymatic oxidation of 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt and decolorization of pinacyanol chloride is tested. The results show that the multilayer structures exhibit high biocatalytic activity and stability in the absence of surfactant molecules during the deposition of the monolayers.
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Affiliation(s)
- Nikolaos Chalmpes
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Michaela Patila
- Laboratory of Biotechnology, Department of Biological Applications and Technology, University of Ioannina, 45110 Ioannina, Greece
| | - Antonios Kouloumpis
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Christina Alatzoglou
- Laboratory of Biotechnology, Department of Biological Applications and Technology, University of Ioannina, 45110 Ioannina, Greece
| | - Konstantinos Spyrou
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Mohammed Subrati
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Angeliki C Polydera
- Laboratory of Biotechnology, Department of Biological Applications and Technology, University of Ioannina, 45110 Ioannina, Greece
| | | | - Haralambos Stamatis
- Laboratory of Biotechnology, Department of Biological Applications and Technology, University of Ioannina, 45110 Ioannina, Greece
| | - Dimitrios Gournis
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece
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Devassy AM, Kamalakshan A, Jamuna NA, Ansilda R, Mandal S. Enhanced Catalytic Activity of a New Nanobiocatalytic System Formed by the Adsorption of Cytochrome c on Pluronic Triblock Copolymer Stabilized MoS 2 Nanosheets. ACS OMEGA 2022; 7:16593-16604. [PMID: 35601299 PMCID: PMC9118411 DOI: 10.1021/acsomega.2c00839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 04/15/2022] [Indexed: 06/15/2023]
Abstract
The formation of nanobiohybrids through the immobilization of enzymes on functional nanomaterials has opened up exciting research opportunities at the nanobiointerfaces. These systems hold great promise for a wide range of applications in biosensing, biocatalytic, and biomedical fields. Here, we report the formation of a hybrid nanobiocatalytic system through the adsorption of cytochrome c (Cyt c) on pluronic triblock copolymer, P123 (PEO-b-PPO-b-PEO), stabilized MoS2 nanosheets. The use of pluronic polymer has helped not only to greatly stabilize the exfoliated MoS2 nanosheets but also to allow easy adsorption of Cyt c on the nanosheets without major structural changes due to its excellent biocompatibility and soft protein-binding property. By comparing the catalytic activity of the Cyt c-MoS2 nanobiohybrid with that of the free Cyt c and as-prepared MoS2 nanosheets, we have demonstrated the active role of the nanobiointeractions in enhancing the catalytic activity of the hybrid. Slight structural perturbation at the active site of the Cyt c upon adsorption on MoS2 has primarily facilitated the peroxidase activity of the Cyt c. As the MoS2 nanosheets and the native Cyt c individually exhibit weaker intrinsic peroxidase activities, their mutual modulation at the nanobiointerface has made the Cyt c-MoS2 a novel nanobiocatalyst with superior activity.
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Affiliation(s)
| | - Adithya Kamalakshan
- Department of Chemistry, National Institute of Technology, Tiruchirappalli, Tamil Nadu 620015, India
| | - Nidhi Anilkumar Jamuna
- Department of Chemistry, National Institute of Technology, Tiruchirappalli, Tamil Nadu 620015, India
| | - Roselin Ansilda
- Department of Chemistry, National Institute of Technology, Tiruchirappalli, Tamil Nadu 620015, India
| | - Sarthak Mandal
- Department of Chemistry, National Institute of Technology, Tiruchirappalli, Tamil Nadu 620015, India
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7
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Xing C, Mei P, Mu Z, Li B, Feng X, Zhang Y, Wang B. Enhancing Enzyme Activity by the Modulation of Covalent Interactions in the Confined Channels of Covalent Organic Frameworks. Angew Chem Int Ed Engl 2022; 61:e202201378. [PMID: 35267241 DOI: 10.1002/anie.202201378] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Indexed: 01/03/2023]
Abstract
Controllable regulations on the enzyme conformation to optimize catalytic performance are highly desired for the immobilized biocatalysts yet remain challenging. Covalent organic frameworks (COFs) possess confined channels with finely tunable pore environment, offering a promising platform for enzyme encapsulation. Herein, we covalently immobilized the cytochrome c (Cyt c) in the size-matched channels of COFs with different contents of anchoring site, and significant enhancement of the stability and activity (≈600 % relative activity compared with free enzyme) can be realized by optimizing the covalent interactions. Structural analyses on the immobilized Cyt c suggest that covalent bonding could induce conformational perturbation resulting in more accessible active sites. The effectiveness of the covalent interaction modulation together with the tailorable confined channels of COFs offers promise to develop high-performance biocatalysts.
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Affiliation(s)
- Chunyan Xing
- Frontiers Science Center for High Energy Material, Advanced Technology Research Institute (Jinan), Key Laboratory of Cluster Science (Ministry of Education), Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Advanced Research Institute of Multidisciplinary Science, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Pei Mei
- Frontiers Science Center for High Energy Material, Advanced Technology Research Institute (Jinan), Key Laboratory of Cluster Science (Ministry of Education), Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Advanced Research Institute of Multidisciplinary Science, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Zhenjie Mu
- Frontiers Science Center for High Energy Material, Advanced Technology Research Institute (Jinan), Key Laboratory of Cluster Science (Ministry of Education), Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Advanced Research Institute of Multidisciplinary Science, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Bixiao Li
- Frontiers Science Center for High Energy Material, Advanced Technology Research Institute (Jinan), Key Laboratory of Cluster Science (Ministry of Education), Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Advanced Research Institute of Multidisciplinary Science, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Xiao Feng
- Frontiers Science Center for High Energy Material, Advanced Technology Research Institute (Jinan), Key Laboratory of Cluster Science (Ministry of Education), Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Advanced Research Institute of Multidisciplinary Science, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Yuanyuan Zhang
- Frontiers Science Center for High Energy Material, Advanced Technology Research Institute (Jinan), Key Laboratory of Cluster Science (Ministry of Education), Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Advanced Research Institute of Multidisciplinary Science, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Bo Wang
- Frontiers Science Center for High Energy Material, Advanced Technology Research Institute (Jinan), Key Laboratory of Cluster Science (Ministry of Education), Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Advanced Research Institute of Multidisciplinary Science, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
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8
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Xing C, Mei P, Mu Z, Li B, Feng X, Zhang Y, Wang B. Enhancing Enzyme Activity by the Modulation of Covalent Interactions in the Confined Channels of Covalent Organic Frameworks. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201378] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Chunyan Xing
- Beijing Institute of Technology School of Chemistry and Chemical Engineering CHINA
| | - Pei Mei
- Beijing Institute of Technology School of Chemistry and Chemical Engineering CHINA
| | - Zhenjie Mu
- Beijing Institute of Technology School of Chemistry and Chemical Engineering CHINA
| | - Bixiao Li
- Beijing Institute of Technology School of Chemistry and Chemical Engineering CHINA
| | - Xiao Feng
- Beijing Institute of Technology School of Chemistry and Chemical Engineering CHINA
| | - Yuanyuan Zhang
- Beijing Institute of Technology Advanced Research Institute of Multidisciplinary Science CHINA
| | - Bo Wang
- Beijing Institute of Technology Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials 5 S. Zhongguancun Ave,Central Building Rm. 108 100081 Beijing CHINA
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Behrouzifar F, Shahidi SA, Chekin F, Hosseini S, Ghorbani-HasanSaraei A. Colorimetric assay based on horseradish peroxidase/reduced graphene oxide hybrid for sensitive detection of hydrogen peroxide in beverages. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 257:119761. [PMID: 33845390 DOI: 10.1016/j.saa.2021.119761] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 03/22/2021] [Accepted: 03/27/2021] [Indexed: 06/12/2023]
Abstract
We reported a simple and sensitive colorimetric assay for detection of hydrogen peroxide (H2O2) based on the oxidation of 2,2׳-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) by UV-Vis spectroscopy method. The reduced graphene oxide (rGO) was prepared using green tea extract as bio-reducing and stabilizer agent and decorated by horseradish peroxidase (HRP). The surface of Au interface was modified with HRP-rGO hybrid. The formation of HRP-rGO hybrid was confirmed by cyclic voltammetry, scanning electron microscopy (SEM), energy-dispersive X-ray Spectroscopy (EDX) and Raman spectroscopy·H2O2 can be catalysed by HRP-rGO hybrid and converted into water and oxygen. The ABTS substrate takes up oxygen to form a green coloured product that has absorption peaks at 421, 655 nm and 737 nm. The colour development is linearly dependent on HRP in the range of 4-50 µg/L. The color of the green product solution is stable for 20 min. The absorption intensity is strongly related to the hydrogen peroxide concentration. The absorption intensity of the formed product scaled linearly with the hydrogen peroxide concentration in the ranges of 0.3-20 µM and 20-8000 µM with a detection limit of ≈15 nM could be achieved. The biosensor with excellent limit detection and wide linear ranges was adapted to monitor H2O2 in different beverages.
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Affiliation(s)
- Fatemeh Behrouzifar
- Department of Food Science and Technology, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran
| | - Seyed-Ahmad Shahidi
- Department of Food Science and Technology, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran
| | - Fereshteh Chekin
- Department of Chemistry, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran.
| | - Shabnam Hosseini
- Department of Material Science and Engineering, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran
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10
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Barros MR, da Silva LP, Menezes TM, Garcia YS, Neves JL. Efficient tyrosinase nano-inhibitor based on carbon dots behaving as a gathering of hydrophobic cores and key chemical group. Colloids Surf B Biointerfaces 2021; 207:112006. [PMID: 34343910 DOI: 10.1016/j.colsurfb.2021.112006] [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] [Received: 04/09/2021] [Revised: 07/19/2021] [Accepted: 07/22/2021] [Indexed: 10/20/2022]
Abstract
Small organic molecules have been extensively applied to achieve enzymatic inhibition. Although numerous efforts have been made to deliver efficient inhibitors, small inhibitors applications are hindered by many drawbacks. Moreover, reporters comprising nanoparticle inhibitory activity against enzymes are very scarce in the literature. In this scenario, carbon nanodots (CDs) emerge as promising candidates for efficient enzyme inhibition due to their unique properties. Here, CDs specific molecular characteristics (core composition and chemical surface groups) have been investigated to produce a more potent enzyme inhibition. Mushroom tyrosinase (mTyr) has been adopted as an enzymatic prototype. The CDs revealed a high affinity to mTyr (Ka ≈ 106 M-1), mainly through hydrophobic forces and followed by slight mTyr structural alteration. CDs competitively inhibit mTyr, with low inhibition constant (KI = 517.7 ± 17.0 nM), which is up 70 fold smaller then the commercial inhibitor (kojic acid) and the starch nanoparticles previously reported. The results expose that the CDs act as a hydrophobic agglomerate with carboxyl groups on its surface, mimicking characteristics found on small molecule inhibitors (but with superior performance). All these results highlight the CD excellent potential as an efficient low toxic Tyr inhibitor, opening the prospect of using these nanoparticles in the cosmetic and food industries.
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Affiliation(s)
- Marcela Rodrigues Barros
- Departamento de Química Fundamental, CCEN, Universidade Federal de Pernambuco, Recife 50670-901, PE, Brazil.
| | - Lucas Pereira da Silva
- Departamento de Química Fundamental, CCEN, Universidade Federal de Pernambuco, Recife 50670-901, PE, Brazil.
| | - Thais Meira Menezes
- Departamento de Química Fundamental, CCEN, Universidade Federal de Pernambuco, Recife 50670-901, PE, Brazil.
| | - Yarima Sanchez Garcia
- Departamento de Química Fundamental, CCEN, Universidade Federal de Pernambuco, Recife 50670-901, PE, Brazil; Centro de estudos avanzados de Cuba, CEA, Valle Grande, La Lisa 17100, La Habana, Cuba.
| | - Jorge Luiz Neves
- Departamento de Química Fundamental, CCEN, Universidade Federal de Pernambuco, Recife 50670-901, PE, Brazil.
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11
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Yu T, Ma H, Zhang H, Xiong M, Liu Y, Li F. Fabrication and characterization of purified esterase-embedded zeolitic imidazolate frameworks for the removal and remediation of herbicide pollution from soil. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 288:112450. [PMID: 33823448 DOI: 10.1016/j.jenvman.2021.112450] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Revised: 03/09/2021] [Accepted: 03/17/2021] [Indexed: 05/19/2023]
Abstract
The fragility and high cost of enzymes represent critical challenges limiting their practical application in the removal of pesticides. Herein, an aryloxyphenoxypropionate herbicide-hydrolyzing enzyme, QpeH, was purified via one-step affinity chromatography and embedded into two types of zeolitic imidazolate frameworks (ZIFs) through biomimetic mineralization. The catalytic activity towards the herbicide quizalofop-P-ethyl, the loading capacity and efficiency of the resulting two composites, QpeH@ZIF-10 with cruciate flower-like morphology and QpeH@ZIF-8 with rhombic dodecahedral morphology, were compared. Both composites had excellent stability and reusability after 10 reuse cycles, with QpeH@ZIF-10 having a better performance. More importantly, when applied for the removal of quizalofop-P-ethyl pollution in the watermelon field, QpeH@ZIF-10 (88%) showed a remarkably improved degradation efficiency compared to QpeH@ZIF-8 (84%) despite the latter having a greater loading capacity. Finally, the use of QpeH@ZIF composites was shown to recover the bacterial community in soil. This work provides a new insight into the low-cost synthesis of nanobiocatalysts combining simple purified enzymes and metal-organic frameworks (MOFs) for the remediation of pesticide-contaminated soils.
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Affiliation(s)
- Ting Yu
- College of Life Sciences, Huaibei Normal University, Huaibei, 235000, China
| | - Hengyan Ma
- College of Life Sciences, Huaibei Normal University, Huaibei, 235000, China
| | - Hui Zhang
- College of Life Sciences, Huaibei Normal University, Huaibei, 235000, China.
| | - Minghua Xiong
- College of Life Sciences, Huaibei Normal University, Huaibei, 235000, China
| | - Yuan Liu
- College of Life Sciences, Huaibei Normal University, Huaibei, 235000, China
| | - Feng Li
- College of Life Sciences, Huaibei Normal University, Huaibei, 235000, China.
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12
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Zhang Q, Zhang J, Song J, Liu Y, Ren X, Zhao Y. Protein-Based Nanomedicine for Therapeutic Benefits of Cancer. ACS NANO 2021; 15:8001-8038. [PMID: 33900074 DOI: 10.1021/acsnano.1c00476] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Proteins, a type of natural biopolymer that possess many prominent merits, have been widely utilized to engineer nanomedicine for fighting against cancer. Motivated by their ever-increasing attention in the scientific community, this review aims to provide a comprehensive showcase on the current landscape of protein-based nanomedicine for cancer therapy. On the basis of role differences of proteins in nanomedicine, protein-based nanomedicine engineered with protein therapeutics, protein carriers, enzymes, and composite proteins is introduced. The cancer therapeutic benefits of the protein-based nanomedicine are also discussed, including small-molecular therapeutics-mediated therapy, macromolecular therapeutics-mediated therapy, radiation-mediated therapy, reactive oxygen species-mediated therapy, and thermal effect-mediated therapy. Lastly, future developments and potential challenges of protein-based nanomedicine are elucidated toward clinical translation. It is believed that protein-based nanomedicine will play a vital role in the battle against cancer. We hope that this review will inspire extensive research interests from diverse disciplines to further push the developments of protein-based nanomedicine in the biomedical frontier, contributing to ever-greater medical advances.
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Affiliation(s)
- Qiuhong Zhang
- International Joint Research Center for Molecular Science, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
- College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Junmin Zhang
- International Joint Research Center for Molecular Science, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Jun Song
- College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Yizhen Liu
- International Joint Research Center for Molecular Science, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Xiangzhong Ren
- International Joint Research Center for Molecular Science, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Yanli Zhao
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
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13
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Chaudhary K, Kumar K, Venkatesu P, Masram DT. Protein immobilization on graphene oxide or reduced graphene oxide surface and their applications: Influence over activity, structural and thermal stability of protein. Adv Colloid Interface Sci 2021; 289:102367. [PMID: 33545443 DOI: 10.1016/j.cis.2021.102367] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 01/06/2021] [Accepted: 01/20/2021] [Indexed: 12/20/2022]
Abstract
Due to the essential role of biological macromolecules in our daily life; it is important to control the stability and activity of such macromolecules. Therefore, the most promising route for enhancement in stability and activity is immobilizing proteins on different support materials. Furthermore, large surface area and surface functional groups are the important features that are required for a better support system. These features of graphene oxide (GO) and reduced graphene oxide (RGO) makes them ideal support materials for protein immobilization. Studies show the successful formation of GO/RGO-protein complexes with enhancement in structural/thermal stability due to various interactions at the nano-bio interface and their utilization in various functional applications. The present review focuses on protein immobilization using GO/RGO as solid support materials. Moreover, we also emphasized on basic underlying mechanism and interactions (hydrophilic, hydrophobic, electrostatic, local protein-protein, hydrogen bonding and van der Walls) between protein and GO/RGO which influences structural stability and activity of enzymes/proteins. Furthermore, GO/RGO-protein complexes are utilized in various applications such as biosensors, bioimaging and theranostic agent, targeted drug delivery agents, and nanovectors for drug and protein delivery.
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14
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Osella S. Artificial Photosynthesis: Is Computation Ready for the Challenge Ahead? NANOMATERIALS 2021; 11:nano11020299. [PMID: 33498961 PMCID: PMC7911014 DOI: 10.3390/nano11020299] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 01/19/2021] [Accepted: 01/20/2021] [Indexed: 12/13/2022]
Abstract
A tremendous effort is currently devoted to the generation of novel hybrid materials with enhanced electronic properties for the creation of artificial photosynthetic systems. This compelling and challenging problem is well-defined from an experimental point of view, as the design of such materials relies on combining organic materials or metals with biological systems like light harvesting and redox-active proteins. Such hybrid systems can be used, e.g., as bio-sensors, bio-fuel cells, biohybrid photoelectrochemical cells, and nanostructured photoelectronic devices. Despite these efforts, the main bottleneck is the formation of efficient interfaces between the biological and the organic/metal counterparts for efficient electron transfer (ET). It is within this aspect that computation can make the difference and improve the current understanding of the mechanisms underneath the interface formation and the charge transfer efficiency. Yet, the systems considered (i.e., light harvesting protein, self-assembly monolayer and surface assembly) are more and more complex, reaching (and often passing) the limit of current computation power. In this review, recent developments in computational methods for studying complex interfaces for artificial photosynthesis will be provided and selected cases discussed, to assess the inherent ability of computation to leave a mark in this field of research.
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Affiliation(s)
- Silvio Osella
- Chemical and Biological Systems Simulation Lab, Center of New Technologies, University of Warsaw, Banacha 2C, 02-097 Warsaw, Poland
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15
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Yang S, Yang J, Wang T, Li L, Yu S, Jia R, Chen P. Construction of a combined enzyme system of graphene oxide and manganese peroxidase for efficient oxidation of aromatic compounds. NANOSCALE 2020; 12:7976-7985. [PMID: 32232306 DOI: 10.1039/d0nr00408a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Manganese peroxidase (MnP) from Irpex lacteus F17 has potential use as a biocatalyst in the field of environmental biotechnology because of its unique properties and ability to decompose harmful aromatic compounds. However, its requirement of harsh acidic reaction conditions and its insufficient catalytic activity restrict its practical applications. Here, we combine graphene oxide (GO) and MnP to construct an efficient enzyme system (GO-MnP) with improved catalytic efficiencies and a wide pH range for the oxidation of aromatic substances and dye decolorization. We found that the Michaelis constant (Km) of GO-MnP for Mn2+ was 2.8 times lower and the catalytic efficiency (kcat/Km) of GO-MnP was 4.5 times higher than those of MnP, and that the decolorization of various dyes by GO-MnP was significantly improved over the pH range of 4.5-5.5. A comparison of the midpoint redox potentials also reflects the strong oxidation ability of GO-MnP. Furthermore, we demonstrated that, in the GO-MnP system, the MnP activity is mainly determined by the amounts of epoxy and carboxyl groups in GO, based on an analysis of the functional group changes in GO and reduced GO associated with different reduction degrees as shown by X-ray photoelectron spectroscopy.
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Affiliation(s)
- Shichao Yang
- School of Life Science, Anhui University, Hefei, Anhui Province, China.
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16
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Lin P, Zhang Y, Yao G, Huo H, Ren H, Wang Y, Wang S, Fang B. Immobilization of formate dehydrogenase on polyethylenimine-grafted graphene oxide with kinetics and stability study. Eng Life Sci 2020; 20:104-111. [PMID: 32874174 PMCID: PMC7447899 DOI: 10.1002/elsc.201900134] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 09/29/2019] [Accepted: 11/03/2019] [Indexed: 12/28/2022] Open
Abstract
Graphene oxide-based nanomaterials are promising for enzyme immobilization due to the possibilities of functionalizing surface. Polyethylenimine-grafted graphene oxide was constructed as a novel scaffold for immobilization of formate dehydrogenase. Compared with free formate dehydrogenase and graphene oxide adsorbed formate dehydrogenase, thermostability, storage stability, and reusability of polyethylenimine-grafted graphene oxide-formate dehydrogenase were enhanced. Typically, polyethylenimine-grafted graphene oxide-formate dehydrogenase remained 47.4% activity after eight times' repeat reaction. The immobilized capacity of the polyethylenimine-grafted graphene oxide was 2.4-folds of that of graphene oxide. Morphological and functional analysis of polyethylenimine-grafted graphene oxide-formate dehydrogenase was performed and the assembling mechanism based on multi-level interactions was studied. Consequently, this practical and facile strategy will likely find applications in biosynthesis, biosensing, and biomedical engineering.
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Affiliation(s)
- Peng Lin
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical EngineeringXiamen UniversityXiamenP. R. China
| | - Yonghui Zhang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical EngineeringXiamen UniversityXiamenP. R. China
- College of Food and Biology EngineeringJimei UniversityXiamenP. R. China
| | - Guangxiao Yao
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical EngineeringXiamen UniversityXiamenP. R. China
| | - Heyu Huo
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical EngineeringXiamen UniversityXiamenP. R. China
| | - Hong Ren
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical EngineeringXiamen UniversityXiamenP. R. China
| | - Yixuan Wang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical EngineeringXiamen UniversityXiamenP. R. China
| | - Shizhen Wang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical EngineeringXiamen UniversityXiamenP. R. China
- The Key Lab for Synthetic Biotechnology of Xiamen CityXiamen UniversityXiamenFujianP. R. China
| | - Baishan Fang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical EngineeringXiamen UniversityXiamenP. R. China
- The Key Lab for Synthetic Biotechnology of Xiamen CityXiamen UniversityXiamenFujianP. R. China
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17
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Wu L, Jiang X. Enhancing Peroxidase Activity of Cytochrome c by Modulating Interfacial Interaction Forces with Graphene Oxide. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:1094-1102. [PMID: 31951423 DOI: 10.1021/acs.langmuir.9b03151] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Graphene oxide (GO) has drawn worldwide attention in various biomedical fields because of its unique properties, and great progress has been made in the past years. Probing the interaction between GO and proteins, understanding and evaluating potential impact of GO on the protein structure and function, is of significant importance for design and optimization of functional interfaces and revealing the bioeffect of GO materials. Cytochrome c (cyt c), one of the key components of respiratory chain, has played important roles in energy generation/consumption and many cellular processes including growth, proliferation, differentiation, and apoptosis. In this study, by combination of solution chemistry and spectroscopy, we systematically studied the interfacial interaction between GO and cyt c. Results suggest that GO could slightly perturb the active site of cyt c, enhancing its peroxidase activity. Structure of the active site is obviously changed with elapsed time, which in turn reduces peroxidase activity. Further study suggests that adsorption of cyt c on GO and the resulted structure change is a complex process resulting from the cooperation of various interaction forces. Hydrophobic interaction and π-π stacking, as well as electrostatic attraction, only slightly perturb the microenvironment of the active site of cyt c while hydrogen-bonding interaction is the main driving force for the structural change of the active site. Furthermore, long range electrostatic attraction between GO and cyt c may facilitate the short range hydrogen-bonding interaction, which intensifies the hydrogen-bonding-induced structural change. In addition, cyt c is partially reduced by GO in an alkaline environment. Based on the understanding of interfacial interaction mechanism between GO and cyt c, stable nanocomposites with enhanced peroxidase activity are successfully constructed by modulating the interfacial interaction forces. This work not only deepens the understanding of interaction between GO and functional protein, but also is of great importance for designing and applying of GO-based biomaterials.
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Affiliation(s)
- Lie Wu
- State Key Lab of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , Jilin , China
| | - Xiue Jiang
- State Key Lab of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , Jilin , China
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18
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Zhang C, Kong C, Liu Q, Chen Z. Ultrasensitive colorimetric detection of Hg2+ ions based on enhanced catalytic performance of gold amalgam dispersed in channels of rose petals. Analyst 2019; 144:1205-1209. [DOI: 10.1039/c8an02075b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We herein present a simple, low-cost, and ultrasensitive colorimetric sensing strategy for the detection of mercury ions (Hg2+) that takes advantage of the natural pore structure in rose petals to encapsulate gold nanoparticles (AuNPs).
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Affiliation(s)
- Chi Zhang
- Department of Chemistry
- Capital Normal University
- Beijing
- P. R. China
| | - Caiyun Kong
- Department of Chemistry
- Capital Normal University
- Beijing
- P. R. China
| | - Qingyun Liu
- College of Chemical and Environmental Engineering
- Shandong University of Science and Technology
- Qingdao
- P. R. China
| | - Zhengbo Chen
- Department of Chemistry
- Capital Normal University
- Beijing
- P. R. China
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19
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Tomaszewski M, Cema G, Ziembińska-Buczyńska A. Short-term effects of reduced graphene oxide on the anammox biomass activity at low temperatures. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 646:206-211. [PMID: 30056228 DOI: 10.1016/j.scitotenv.2018.07.283] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Revised: 07/20/2018] [Accepted: 07/20/2018] [Indexed: 06/08/2023]
Abstract
Anaerobic ammonium oxidation (anammox) is an efficient process for nitrogen removal from wastewater, but its common use is limited by its relatively high optimal temperature (30 °C). One of the major bottlenecks of the implementation of mainstream PN/A process is the low activity of the anammox bacteria at low temperature. Due to this reason over the past years, numerous researchers have attempted to overcome this limitation. Recently it was shown that the reduced graphene oxide (RGO) can accelerate the anammox bacteria activity. However all these studies were performed at high temperatures (over 30 °C). Thus, in this study, supporting the anammox process at low temperatures (10-30 °C) by the RGO was investigated for the first time. The statistical analysis confirmed that RGO significantly affects the anammox activity. The stimulation effect of RGO on the anammox bacteria activity is of particular importance at low temperatures, when drastic decrease in process activity is observed at temperatures below 15 °C. The short-term experimental results demonstrated stimulation of the anammox activity at 13 °C, up to 28% by 15 mg RGO/L, but concentrations above 40 mg RGO/L caused the process inhibition, up to 30% with 50 mg RGO/L. However, the effect of RGO probably depends on the nanomaterial dose per biomass unit and the optimal range of this value was evaluated as 20 to 45 mg RGO/g VSS (volatile suspended solids).
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Affiliation(s)
- Mariusz Tomaszewski
- Silesian University of Technology, Environmental Biotechnology Department, Akademicka 2, 44-100 Gliwice, Poland.
| | - Grzegorz Cema
- Silesian University of Technology, Environmental Biotechnology Department, Akademicka 2, 44-100 Gliwice, Poland
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20
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Palladium-mediated hybrid biocatalysts with enhanced enzymatic catalytic performance via allosteric effects. J Colloid Interface Sci 2019; 533:1-8. [DOI: 10.1016/j.jcis.2018.08.052] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 08/16/2018] [Accepted: 08/17/2018] [Indexed: 01/08/2023]
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21
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Zhu Q, Zhuang W, Chen Y, Wang Z, Villacorta Hernandez B, Wu J, Yang P, Liu D, Zhu C, Ying H, Zhu Z. Nano-Biocatalysts of Cyt c@ZIF-8/GO Composites with High Recyclability via a de Novo Approach. ACS APPLIED MATERIALS & INTERFACES 2018; 10:16066-16076. [PMID: 29687711 DOI: 10.1021/acsami.8b00072] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
To improve the stability and recyclability of enzymes immobilized on metal-organic frameworks (MOFs), graphene oxide (GO) with surface oxygen-rich functional groups was selected to form ZIF-8/GO nanocomposites with the zeolitic imidazolate framework (ZIF-8) for cytochrome c (Cyt c) immobilization. It was found that the functional groups on the GO surface were involved in the growth of ZIF-8 without affecting the crystal structure but their particle size was reduced to about 200 nm. The storage stability and resistance to organic solvents of Cyt c were obviously improved after the immobilization on the ZIF-8/GO nanocomposite. On one hand, compared with Cyt c@ZIF-8 and Cyt c@GO with 30 and 60% protein leakage, Cyt c@ZIF-8/GO displayed little protein leakage after 60 h of storage. On the other hand, Cyt c@ZIF-8/GO retained a residual activity of approximately 100% after being stored in ethanol and acetone for 2 h, whereas the free enzyme, Cyt c@ZIF-8, and Cyt c@GO retained only about 10, 50, and 40%, respectively. In addition, the Cyt c@ZIF-8/GO nanocomposites can be utilized up to four cycles with virtually no loss of activity and may be further applied on H2O2 biosensing systems. The synergistic effect between MOFs and GO in ZIF-8/GO nanocomposites provides infinite possibilities as immobilized enzyme carriers.
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Affiliation(s)
| | - Wei Zhuang
- State Key Laboratory of Materials-Oriented Chemical Engineering , Nanjing Tech University , No. 5 Xinmofan Road , Nanjing 210009 , China
- School of Chemical Engineering , The University of Queensland , St. Lucia , Queensland 4072 , Australia
| | - Yong Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering , Nanjing Tech University , No. 5 Xinmofan Road , Nanjing 210009 , China
| | - Zhanke Wang
- School of Chemical Engineering , The University of Queensland , St. Lucia , Queensland 4072 , Australia
| | | | - Jinglan Wu
- State Key Laboratory of Materials-Oriented Chemical Engineering , Nanjing Tech University , No. 5 Xinmofan Road , Nanjing 210009 , China
| | - Pengpeng Yang
- State Key Laboratory of Materials-Oriented Chemical Engineering , Nanjing Tech University , No. 5 Xinmofan Road , Nanjing 210009 , China
| | - Dong Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering , Nanjing Tech University , No. 5 Xinmofan Road , Nanjing 210009 , China
| | - Chenjie Zhu
- State Key Laboratory of Materials-Oriented Chemical Engineering , Nanjing Tech University , No. 5 Xinmofan Road , Nanjing 210009 , China
| | - Hanjie Ying
- State Key Laboratory of Materials-Oriented Chemical Engineering , Nanjing Tech University , No. 5 Xinmofan Road , Nanjing 210009 , China
| | - Zhonghua Zhu
- School of Chemical Engineering , The University of Queensland , St. Lucia , Queensland 4072 , Australia
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22
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Zhou Y, Huang X, Zhang W, Ji Y, Chen R, Xiong Y. Multi-branched gold nanoflower-embedded iron porphyrin for colorimetric immunosensor. Biosens Bioelectron 2018; 102:9-16. [DOI: 10.1016/j.bios.2017.10.046] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2017] [Revised: 10/07/2017] [Accepted: 10/25/2017] [Indexed: 12/27/2022]
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23
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Kempahanumakkagari S, Kumar V, Samaddar P, Kumar P, Ramakrishnappa T, Kim KH. Biomolecule-embedded metal-organic frameworks as an innovative sensing platform. Biotechnol Adv 2018; 36:467-481. [DOI: 10.1016/j.biotechadv.2018.01.014] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2017] [Revised: 12/31/2017] [Accepted: 01/22/2018] [Indexed: 11/29/2022]
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24
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Lin P, Zhang Y, Ren H, Wang Y, Wang S, Fang B. Assembly of graphene oxide-formate dehydrogenase composites by nickel-coordination with enhanced stability and reusability. Eng Life Sci 2018; 18:326-333. [PMID: 32624912 DOI: 10.1002/elsc.201700137] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 01/09/2018] [Accepted: 01/25/2018] [Indexed: 12/17/2022] Open
Abstract
Featuring unique planar structure, large surface area and biocompatibility, graphene oxide (GO) has been widely taken as an ideal scaffold for the immobilization of various enzymes. In this regard, nickel-coordinated graphene oxide composites (GO-Ni) were prepared as novel supporters for the immobilization of formate dehydrogenase. The catalytic activity, stability and morphology were studied. Compared with GO, the enzyme loading capacity of GO-Ni was enhanced by 5.2-fold, besides the immobilized enzyme GO-Ni-FDH exhibited better thermostability, storage stability and reuse stability than GO-FDH. GO-Ni-FDH retained 40.9% of its initial activity after 3 h at 60°C, and retained 31.4% of its initial relative activity after 20 days' storage at 4°C. After eight times usages, GO-Ni-FDH maintained 63.8% of its initial activity. Mechanism insights of the multiple interactions of enzyme with the GO-Ni were studied, considering coordination bonds, hydrogen bonds, electrostatic forces, coordination bonds, and etc. A practical and simple immobilization strategy by metal ions coordination for multimeric dehydrogenase was developed.
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Affiliation(s)
- Peng Lin
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian P. R. China
| | - Yonghui Zhang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian P. R. China
| | - Hong Ren
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian P. R. China
| | - Yixuan Wang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian P. R. China
| | - Shizhen Wang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian P. R. China.,The Key Lab for Synthetic Biotechnology of Xiamen City Xiamen University Xiamen Fujian P. R. China
| | - Baishan Fang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian P. R. China.,The Key Lab for Synthetic Biotechnology of Xiamen City Xiamen University Xiamen Fujian P. R. China
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25
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Hu L, Li H, Liu C, Song Y, Zhang M, Huang H, Liu Y, Kang Z. Chiral evolution of carbon dots and the tuning of laccase activity. NANOSCALE 2018; 10:2333-2340. [PMID: 29327752 DOI: 10.1039/c7nr08335a] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Chirality has attracted extensive attention in many fields ranging from chemistry to life sciences. Carbon dots (CDs) with good biocompatibility and unique photochemical properties have become a new star in the nanocarbon family. Endowed with chirality, CDs will exhibit more marvellous properties and bridge the fields of material chemistry and life sciences tightly. Herein, we report a facile one-step alkali-assisted electrochemical method to fabricate chiral CDs from cysteine (cys). We showed the chiral evolution of CDs with highly symmetrical circular dichroism (CD) signals in the range from 205 to 350 nm. These chiral CDs have been further demonstrated to be capable of tuning the activity of laccase: the l-CDs can improve the activity of the enzyme up to 20.2%, whereas the d-CDs decrease the activity to 10.4%. A series of experiments confirm that it is the synergistic effect of nanosize and chirality of CDs that induces the change in the structure of laccase and thus leads to the tuning of the laccase activity.
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Affiliation(s)
- Lulu Hu
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China.
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26
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Ramakrishna TRB, Nalder TD, Yang W, Marshall SN, Barrow CJ. Controlling enzyme function through immobilisation on graphene, graphene derivatives and other two dimensional nanomaterials. J Mater Chem B 2018; 6:3200-3218. [DOI: 10.1039/c8tb00313k] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Controlling enzyme function through immobilisation on graphene, graphene derivatives and other two dimensional nanomaterials.
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Affiliation(s)
- Tejaswini R. B. Ramakrishna
- School of Life and Environmental Sciences
- Deakin University
- Australia
- Seafood Unit
- The New Zealand Institute for Plant & Food Research Limited
| | - Tim D. Nalder
- School of Life and Environmental Sciences
- Deakin University
- Australia
- Seafood Unit
- The New Zealand Institute for Plant & Food Research Limited
| | - Wenrong Yang
- School of Life and Environmental Sciences
- Deakin University
- Australia
| | - Susan N. Marshall
- Seafood Unit
- The New Zealand Institute for Plant & Food Research Limited
- Nelson 7010
- New Zealand
| | - Colin J. Barrow
- School of Life and Environmental Sciences
- Deakin University
- Australia
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27
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Zhang S, Zhang D, Zhang X, Shang D, Xue Z, Shan D, Lu X. Ultratrace Naked-Eye Colorimetric Detection of Hg2+ in Wastewater and Serum Utilizing Mercury-Stimulated Peroxidase Mimetic Activity of Reduced Graphene Oxide-PEI-Pd Nanohybrids. Anal Chem 2017; 89:3538-3544. [DOI: 10.1021/acs.analchem.6b04805] [Citation(s) in RCA: 156] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Shouting Zhang
- Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, P. R. China
- Department
of Chemistry, Tianjin University, Tianjin 300072, P. R. China
| | - Dongxu Zhang
- Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, P. R. China
| | - Xuehong Zhang
- Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, P. R. China
| | - Denghui Shang
- Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, P. R. China
| | - Zhonghua Xue
- Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, P. R. China
| | - Duoliang Shan
- Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, P. R. China
| | - Xiaoquan Lu
- Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, P. R. China
- Department
of Chemistry, Tianjin University, Tianjin 300072, P. R. China
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Xiaoyan Z, Yuanyuan J, Zaijun L, Zhiguo G, Guangli W. Improved activity and thermo-stability of the horse radish peroxidase with graphene quantum dots and its application in fluorometric detection of hydrogen peroxide. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 165:106-113. [PMID: 27116472 DOI: 10.1016/j.saa.2016.03.049] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Revised: 03/19/2016] [Accepted: 03/29/2016] [Indexed: 06/05/2023]
Abstract
Graphene quantum dots (GQDs) have received extensive concern in many fields such as optical probe, bioimaging and biosensor. However, few reports refer on the influence of GQDs on enzyme performance. The paper reports two kinds of graphene quantum dots (termed as GO-GQDs and N,S-GQDs) that were prepared by cutting of graphene oxide and pyrolysis of citric acid and l-cysteine, and their use for the horse radish peroxidase (HRP) modification. The study reveals that GO-GQDs and N,S-GQDs exhibit an opposite effect on the HRP performance. Only HRP modified with GO-GQDs offers an enhanced activity (more than 1.9 times of pristine enzyme) and thermo-stability. This is because GO-GQDs offer a larger conjugate rigid plane and fewer hydrophilic groups compared to N,S-GQDs. The characteristics can make GO-GQDs induce a proper conformational change in the HRP for the catalytic performance, improving the enzyme activity and thermo-stability. The HRP modified with green luminescent GO-GQDs was also employed as a biocatalyst for sensing of H2O2 by a fluorometric sensor. The colorless tetramethylbenzidine (TMB) is oxidized into blue oxidized TMB in the presence of H2O2 by the assistance of HRP/GO-GQDs, leading to an obvious fluorescence quenching. The fluorescence intensity linearly decreases with the increase of H2O2 concentration in the range from 2×10-9 to 2×10-4M with the detection limit of 6.8×10-10M. The analytical method provides the advantage of sensitivity, stability and accuracy compared with present H2O2 sensors based on the pristine HRP. It has been successfully applied in the determination of H2O2 in real water samples. The study also opens a new avenue for modification of enzyme activity and stability that offers great promise in applications such as biological catalysis, biosensing and enzyme engineering.
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Affiliation(s)
- Zhou Xiaoyan
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Jiang Yuanyuan
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Li Zaijun
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China; The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, Wuxi 214122, China.
| | - Gu Zhiguo
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
| | - Wang Guangli
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
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29
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Vlasova II, Kapralov AA, Michael ZP, Burkert SC, Shurin MR, Star A, Shvedova AA, Kagan VE. Enzymatic oxidative biodegradation of nanoparticles: Mechanisms, significance and applications. Toxicol Appl Pharmacol 2016; 299:58-69. [PMID: 26768553 PMCID: PMC4811710 DOI: 10.1016/j.taap.2016.01.002] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 01/01/2016] [Accepted: 01/02/2016] [Indexed: 12/22/2022]
Abstract
Biopersistence of carbon nanotubes, graphene oxide (GO) and several other types of carbonaceous nanomaterials is an essential determinant of their health effects. Successful biodegradation is one of the major factors defining the life span and biological responses to nanoparticles. Here, we review the role and contribution of different oxidative enzymes of inflammatory cells - myeloperoxidase, eosinophil peroxidase, lactoperoxidase, hemoglobin, and xanthine oxidase - to the reactions of nanoparticle biodegradation. We further focus on interactions of nanomaterials with hemoproteins dependent on the specific features of their physico-chemical and structural characteristics. Mechanistically, we highlight the significance of immobilized peroxidase reactive intermediates vs diffusible small molecule oxidants (hypochlorous and hypobromous acids) for the overall oxidative biodegradation process in neutrophils and eosinophils. We also accentuate the importance of peroxynitrite-driven pathways realized in macrophages via the engagement of NADPH oxidase- and NO synthase-triggered oxidative mechanisms. We consider possible involvement of oxidative machinery of other professional phagocytes such as microglial cells, myeloid-derived suppressor cells, in the context of biodegradation relevant to targeted drug delivery. We evaluate the importance of genetic factors and their manipulations for the enzymatic biodegradation in vivo. Finally, we emphasize a novel type of biodegradation realized via the activation of the "dormant" peroxidase activity of hemoproteins by the nano-surface. This is exemplified by the binding of GO to cyt c causing the unfolding and 'unmasking' of the peroxidase activity of the latter. We conclude with the strategies leading to safe by design carbonaceous nanoparticles with optimized characteristics for mechanism-based targeted delivery and regulatable life-span of drugs in circulation.
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Affiliation(s)
- Irina I Vlasova
- Department of Environmental and Occupational Health, Center for Free Radical and Antioxidant Health, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA 15219, United States; Research Institute for Physico-Chemical Medicine, Federal Medico-Biological Agency, Moscow 119453, Russia
| | - Alexandr A Kapralov
- Department of Environmental and Occupational Health, Center for Free Radical and Antioxidant Health, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA 15219, United States
| | - Zachary P Michael
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, United States
| | - Seth C Burkert
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, United States
| | - Michael R Shurin
- Department of Pathology, University of Pittsburgh Medical Center, Pittsburgh, PA 15261, United States; Department of Immunology, University of Pittsburgh Medical Center, Pittsburgh, PA 15261, United States
| | - Alexander Star
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, United States
| | - Anna A Shvedova
- Pathology and Physiology Research Branch, Health Effects Laboratory Division (HELD), National Institute for Occupational Safety and Health (NIOSH) and Department of Physiology and Pharmacology, West Virginia University, Morgantown, WV 26505, United States.
| | - Valerian E Kagan
- Department of Environmental and Occupational Health, Center for Free Radical and Antioxidant Health, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA 15219, United States; Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, United States; Departments of Pharmacology and Chemical Biology and Radiation Oncology, University of Pittsburgh, Pittsburgh, PA 15260, United States.
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30
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Essner JB, McCay RN, Smith Ii CJ, Cobb SM, Laber CH, Baker GA. A switchable peroxidase mimic derived from the reversible co-assembly of cytochrome c and carbon dots. J Mater Chem B 2016; 4:2163-2170. [PMID: 32263183 DOI: 10.1039/c6tb00052e] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We describe a straightforward tactic to boost the inherently low peroxidase-like activity of the heme-protein equine cytochrome c (cyt c) following its electrostatic assembly onto the carbon nanodot surface. This represents the first time that carbon nanodot interaction has been demonstrated to switch a protein into a high-performance enzyme for speeding up a reaction it was not evolved to catalyze. The dramatic enhancement in peroxidase-like activity stems in part from favorable local perturbations within the heme microenvironment of cyt c which are influenced by the chemistry presented at the carbon dot surface. That is, the observed peroxidase activity is clearly moderated by the choice of molecular precursors used to prepare the carbon dots, a choice which ultimately determines the surface charges present. An exceptional catalytic efficiency (kcat/KM) of 8.04 (±1.74) × 107 M-1 s-1 was determined for carbon dot/cyt c co-assemblies, close to the theoretical diffusion-controlled limit. Notably, the activity of the carbon dot/cyt c assembly can be switched off simply by increasing the ionic strength which results in dissociation into non-catalytic components.
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Affiliation(s)
- Jeremy B Essner
- Department of Chemistry, University of Missouri-Columbia, Columbia, MO 65211, USA.
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31
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Graphene oxide derivatives with variable alkyl chain length and terminal functional groups as supports for stabilization of cytochrome c. Int J Biol Macromol 2016; 84:227-35. [DOI: 10.1016/j.ijbiomac.2015.12.023] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Revised: 12/08/2015] [Accepted: 12/10/2015] [Indexed: 11/20/2022]
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32
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Chen J, Jiang Z, Ackerman JD, Yazdani M, Hou S, Nugen SR, Rotello VM. Electrochemical nanoparticle-enzyme sensors for screening bacterial contamination in drinking water. Analyst 2016; 140:4991-6. [PMID: 26042607 DOI: 10.1039/c5an00637f] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Traditional plating and culturing methods used to quantify bacteria commonly require hours to days from sampling to results. We present here a simple, sensitive and rapid electrochemical method for bacterial detection in drinking water based on gold nanoparticle-enzyme complexes. The gold nanoparticles were functionalized with positively charged quaternary amine headgroups that could bind to enzymes through electrostatic interactions, resulting in inhibition of enzymatic activity. In the presence of bacteria, the nanoparticles were released from the enzymes and preferentially bound to the bacteria, resulting in an increase in enzyme activity, releasing a redox-active phenol from the substrate. We employed this strategy for the electrochemical sensing of Escherichia coli and Staphylococcus aureus, resulting in a rapid detection (<1 h) with high sensitivity (10(2) CFU mL(-1)).
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Affiliation(s)
- Juhong Chen
- Department of Food Science, University of Massachusetts, 102 Holdsworth Way, Amherst, Massachusetts 01003, USA.
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33
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Hu P, Yang B. Cleavable DNA-protein hybrid molecular beacon: A novel efficient signal translator for sensitive fluorescence anisotropy bioassay. Talanta 2015; 147:276-81. [PMID: 26592607 DOI: 10.1016/j.talanta.2015.10.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Revised: 09/30/2015] [Accepted: 10/01/2015] [Indexed: 11/27/2022]
Abstract
Due to its unique features such as high sensitivity, homogeneous format, and independence on fluorescent intensity, fluorescence anisotropy (FA) assay has become a hotspot of study in oligonucleotide-based bioassays. However, until now most FA probes require carefully customized structure designs, and thus are neither generalizable for different sensing systems nor effective to obtain sufficient signal response. To address this issue, a cleavable DNA-protein hybrid molecular beacon was successfully engineered for signal amplified FA bioassay, via combining the unique stable structure of molecular beacon and the large molecular mass of streptavidin. Compared with single DNA strand probe or conventional molecular beacon, the DNA-protein hybrid molecular beacon exhibited a much higher FA value, which was potential to obtain high signal-background ratio in sensing process. As proof-of-principle, this novel DNA-protein hybrid molecular beacon was further applied for FA bioassay using DNAzyme-Pb(2+) as a model sensing system. This FA assay approach could selectively detect as low as 0.5nM Pb(2+) in buffer solution, and also be successful for real samples analysis with good recovery values. Compatible with most of oligonucleotide probes' designs and enzyme-based signal amplification strategies, the molecular beacon can serve as a novel signal translator to expand the application prospect of FA technology in various bioassays.
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Affiliation(s)
- Pan Hu
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 410005, PR China
| | - Bin Yang
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 410005, PR China.
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Guo S, Li H, Liu J, Yang Y, Kong W, Qiao S, Huang H, Liu Y, Kang Z. Visible-Light-Induced Effects of Au Nanoparticle on Laccase Catalytic Activity. ACS APPLIED MATERIALS & INTERFACES 2015; 7:20937-20944. [PMID: 26322738 DOI: 10.1021/acsami.5b06472] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A deep understanding of the interaction between the nanoparticle and enzyme is important for biocatalyst design. Here, we report the in situ synthesis of laccase-Au NP (laccase-Au) hybrids and its catalytic activity modulation by visible light. In the present hybrid system, the activity of laccase was significantly improved (increased by 91.2% vs free laccase) by Au NPs. With a short time visible light illumination (λ > 420 nm, within 3 min), the activity of laccase-Au hybrids decreased by 8.1% (vs laccase-Au hybrid without light), which can be restored to its initial one when the illumination is removed. However, after a long time illumination (λ > 420 nm, over 10 min), the catalytic activity of laccase-Au hybrids consecutively decreases and is not reversible even after removing the illumination. Our experiments also suggested that the local surface plasma resonance effect of Au NPs causes the structure change of laccase and local high temperature near the Au NPs. Those changes eventually affect the transportation of electrons in laccase, which further results in the declined activity of laccase.
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Affiliation(s)
- Sijie Guo
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University , 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China
| | - Hao Li
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University , 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China
| | - Juan Liu
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University , 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China
| | - Yanmei Yang
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University , 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China
| | - Weiqian Kong
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University , 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China
| | - Shi Qiao
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University , 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China
| | - Hui Huang
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University , 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China
| | - Yang Liu
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University , 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China
| | - Zhenhui Kang
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University , 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China
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35
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Lyu F, Zhang Y, Zare RN, Ge J, Liu Z. One-pot synthesis of protein-embedded metal-organic frameworks with enhanced biological activities. NANO LETTERS 2014; 14:5761-5. [PMID: 25211437 DOI: 10.1021/nl5026419] [Citation(s) in RCA: 597] [Impact Index Per Article: 59.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Protein molecules were directly embedded in metal-organic frameworks (MOFs) by a coprecipitation method. The protein molecules majorly embedded on the surface region of MOFs display high biological activities. As a demonstration of the power of such materials, the resulting Cyt c embedded in ZIF-8 showed a 10-fold increase in peroxidase activity compared to free Cyt c in solution and thus gave convenient, fast, and highly sensitive detection of trace amounts of explosive organic peroxides in solution.
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Affiliation(s)
- Fengjiao Lyu
- Key Lab for Industrial Biocatalysis, Ministry of Education, Department of Chemical Engineering, Tsinghua University , Beijing 100084, China
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36
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Qu Z, Zhang M, Zhou T, Shi G. A Single‐Wavelength‐Emitting Ratiometric Probe Based on Phototriggered Fluorescence Switching of Graphene Quantum Dots. Chemistry 2014; 20:13777-82. [DOI: 10.1002/chem.201404160] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2014] [Indexed: 11/06/2022]
Affiliation(s)
- Zhi‐bei Qu
- Department of Chemistry, East China Normal University, Dongchuan RD 500, Shanghai, 200241 (P. R. China), Fax: (+86) 21‐54340043
| | - Min Zhang
- Department of Chemistry, East China Normal University, Dongchuan RD 500, Shanghai, 200241 (P. R. China), Fax: (+86) 21‐54340043
| | - Tianshu Zhou
- Department of Environmental Science, East China Normal University, Dongchuan RD 500, Shanghai, 200241 (P. R. China)
| | - Guoyue Shi
- Department of Chemistry, East China Normal University, Dongchuan RD 500, Shanghai, 200241 (P. R. China), Fax: (+86) 21‐54340043
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37
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Pang R, Li M, Zhang C. Degradation of phenolic compounds by laccase immobilized on carbon nanomaterials: diffusional limitation investigation. Talanta 2014; 131:38-45. [PMID: 25281070 DOI: 10.1016/j.talanta.2014.07.045] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2014] [Revised: 07/11/2014] [Accepted: 07/16/2014] [Indexed: 11/25/2022]
Abstract
Carbon nanoparticles are promising candidates for enzyme immobilization. We investigated enzyme loading and laccase activity on various carbon nanoparticles, fullerene (C60), multi-walled carbon nanotubes (MWNTs), oxidized-MWNTs (O-MWNTs), and graphene oxide (GO). The loading capacity was highest for O-MWNTs and lowest for C60. The activity of laccase on various nanomatrices using 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTs) as a substrate decreased in the following order: GO>MWNTs>O-MWNTs>C60. We speculated that aggregation of the nanoparticles influenced enzyme loading and activity by reducing the available adsorption space and substrate accessibility. The nanoparticle-immobilized laccase was then used for removal of bisphenol and catechol substrates. Compared to free laccase, the immobilized enzymes had significantly reduced reaction rates. For example, the reaction rate of GO-laccase conjugated with bisphenol or catechol substrates was only 10.28% or 12.33%, respectively, of that of the free enzyme. Considering that there was no obvious structural change observed after enzyme immobilization, nanomatrix-induced diffusional limitation most likely caused the low reaction rates. These results demonstrate that the diffusional limitation induced by the aggregation of carbon nanoparticles cannot be ignored because it can lead to increased reaction times, low efficiency, and high economic costs. Furthermore, this problem is exacerbated when low concentrations of environmental contaminants are used.
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Affiliation(s)
- Ran Pang
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300071, China
| | - Mingzhu Li
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300071, China
| | - Chengdong Zhang
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300071, China.
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38
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Graphene-based nanobiocatalytic systems: recent advances and future prospects. Trends Biotechnol 2014; 32:312-20. [PMID: 24794165 DOI: 10.1016/j.tibtech.2014.04.004] [Citation(s) in RCA: 138] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 03/29/2014] [Accepted: 04/02/2014] [Indexed: 01/06/2023]
Abstract
Graphene-based nanomaterials are particularly useful nanostructured materials that show great promise in biotechnology and biomedicine. Owing to their unique structural features, exceptional chemical, electrical, and mechanical properties, and their ability to affect the microenvironment of biomolecules, graphene-based nanomaterials are suitable for use in various applications, such as immobilization of enzymes. We present the current advances in research on graphene-based nanomaterials used as novel scaffolds to build robust nanobiocatalytic systems. Their catalytic behavior is affected by the nature of enzyme-nanomaterial interactions and, thus, the availability of methods to couple enzymes with nanomaterials is an important issue. We discuss the implications of such interactions along with future prospects and possible challenges in this rapidly developing area.
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