1
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Pu S, Hadinoto K. Salting-Out crystallization of glycopeptide Vancomycin: Phase behavior study to control the crystal habit. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.118057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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2
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Link F, Heng JYY. Unraveling the Impact of pH on the Crystallization of Pharmaceutical Proteins: A Case Study of Human Insulin. CRYSTAL GROWTH & DESIGN 2022; 22:3024-3033. [PMID: 35529069 PMCID: PMC9073949 DOI: 10.1021/acs.cgd.1c01463] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 03/15/2022] [Indexed: 05/23/2023]
Abstract
One of the most crucial parameters in protein crystallization is pH, as it governs the protein's electrostatic interactions. However, the fundamental role of pH on crystallization still remains unknown. Here, we systematically investigated the crystallization of human insulin (isoelectric point 5.3) at various pHs between 6.0 and 6.7 at different supersaturation ratios, up to 20.9. Our results demonstrate that the pH has an opposing effect on solubility and nucleation rate as a shift in pH toward a more basic milieu increases the solubility by 5-fold while the onset of nucleation was accelerated by a maximum of 8.6-fold. To shed light on this opposing effect, we evaluated the protein-protein interactions as a function of pH by measuring the second virial coefficient and hydrodynamic radius and showed that a change in pH of less than one unit has no significant impact on the protein-protein interactions. As it is widely understood that the increase in protein solubility as a function of pH is due to the increase in the repulsive electrostatic interactions, we have demonstrated that the increase in insulin solubility and decrease in the onset of nucleation are independent of the protein-protein interactions. We hypothesize that it is the electrostatic interactions between both ions and solvent molecules and the protein residues that are governing the crystallization of human insulin. The findings of this study will be of crucial importance for the design of novel crystallization pathways.
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Affiliation(s)
- Frederik
J. Link
- Department
of Chemical Engineering, Imperial College
London, South Kensington Campus, London SW7 2AZ, U.K.
| | - Jerry Y. Y. Heng
- Department
of Chemical Engineering, Imperial College
London, South Kensington Campus, London SW7 2AZ, U.K.
- Institute
for Molecular Science and Engineering, Imperial
College London, South Kensington Campus, London SW7 2AZ, U.K.
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3
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Link FJ, Heng JYY. Enhancing the crystallisation of insulin using amino acids as soft-templates to control nucleation. CrystEngComm 2021. [DOI: 10.1039/d1ce00026h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Amino acid as soft templates in promoting nucleation of insulin.
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Affiliation(s)
- Frederik J. Link
- Department of Chemical Engineering
- Imperial College London, South Kensington Campus
- London SW7 2AZ
- UK
| | - Jerry Y. Y. Heng
- Department of Chemical Engineering
- Imperial College London, South Kensington Campus
- London SW7 2AZ
- UK
- Institute for Molecular Science and Engineering
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4
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Sala BM, Le Marchand T, Pintacuda G, Camilloni C, Natalello A, Ricagno S. Conformational Stability and Dynamics in Crystals Recapitulate Protein Behavior in Solution. Biophys J 2020; 119:978-988. [PMID: 32758421 DOI: 10.1016/j.bpj.2020.07.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 07/08/2020] [Accepted: 07/20/2020] [Indexed: 11/29/2022] Open
Abstract
A growing body of evidences has established that in many cases proteins may preserve most of their function and flexibility in a crystalline environment, and several techniques are today capable to characterize molecular properties of proteins in tightly packed lattices. Intriguingly, in the case of amyloidogenic precursors, the presence of transiently populated states (hidden to conventional crystallographic studies) can be correlated to the pathological fate of the native fold; the low fold stability of the native state is a hallmark of aggregation propensity. It remains unclear, however, to which extent biophysical properties of proteins such as the presence of transient conformations or protein stability characterized in crystallo reflect the protein behavior that is more commonly studied in solution. Here, we address this question by investigating some biophysical properties of a prototypical amyloidogenic system, β2-microglobulin in solution and in microcrystalline state. By combining NMR chemical shifts with molecular dynamics simulations, we confirmed that conformational dynamics of β2-microglobulin native state in the crystal lattice is in keeping with what observed in solution. A comparative study of protein stability in solution and in crystallo is then carried out, monitoring the change in protein secondary structure at increasing temperature by Fourier transform infrared spectroscopy. The increased structural order of the crystalline state contributes to provide better resolved spectral components compared to those collected in solution and crucially, the crystalline samples display thermal stabilities in good agreement with the trend observed in solution. Overall, this work shows that protein stability and occurrence of pathological hidden states in crystals parallel their solution counterpart, confirming the interest of crystals as a platform for the biophysical characterization of processes such as unfolding and aggregation.
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Affiliation(s)
| | - Tanguy Le Marchand
- Centre de Résonance Magnétique Nucléaire à Très Hauts Champs (FRE 2034 CNRS, UCBL, ENS Lyon), Université de Lyon, Villeurbanne, France
| | - Guido Pintacuda
- Centre de Résonance Magnétique Nucléaire à Très Hauts Champs (FRE 2034 CNRS, UCBL, ENS Lyon), Université de Lyon, Villeurbanne, France
| | - Carlo Camilloni
- Dipartimento di Bioscienze, Università degli Studi di Milano, Milano, Italy.
| | - Antonino Natalello
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milano, Italy.
| | - Stefano Ricagno
- Dipartimento di Bioscienze, Università degli Studi di Milano, Milano, Italy.
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5
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Mao Y, Li F, Wang T, Cheng X, Li G, Li D, Zhang X, Hao H. Enhancement of lysozyme crystallization under ultrasound field. ULTRASONICS SONOCHEMISTRY 2020; 63:104975. [PMID: 31986330 DOI: 10.1016/j.ultsonch.2020.104975] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 01/14/2020] [Accepted: 01/14/2020] [Indexed: 06/10/2023]
Abstract
With the increasing demand for biopharmaceuticals, a method to crystallize biomolecule products with high quality, high yield and uniform size distribution as well as regular crystal habit is needed. In this work, ultrasound was used as a nucleation accelerator to decrease the energy barrier for lysozyme crystal formation. Crystallization experiments on egg-white lysozyme were carried out with and without ultrasound. The effect of ultrasound on induction time, metastable zone width, crystal size and morphology and process yield was investigated in detail. The nucleation-promoting effect produced by ultrasound is illustrated by the reduction of metastable zone width and induction time. By inducing faster nucleation, ultrasound leads to protein crystals grow at lower supersaturation levels with shorter induction time. It was found that ultrasound could result in uniform size distribution of the product due to the preventing of aggregation. However, long time continuous application of ultrasound could result in smaller particle size. Hence, ultrasonic-stop method was found to be a more appropriate strategy to enhance the crystallization process of proteins such as lysozyme.
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Affiliation(s)
- Yafei Mao
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Fei Li
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Ting Wang
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Xiaowei Cheng
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Guiping Li
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Danning Li
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Xiunan Zhang
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Hongxun Hao
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China.
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6
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Zhang CY, Liu Y, Tian XH, Liu WJ, Li XY, Yang LX, Jiang HJ, Han C, Chen KA, Yin DC. Effect of real-world sounds on protein crystallization. Int J Biol Macromol 2018; 112:841-851. [PMID: 29425866 DOI: 10.1016/j.ijbiomac.2018.02.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Revised: 01/31/2018] [Accepted: 02/06/2018] [Indexed: 11/24/2022]
Abstract
Protein crystallization is sensitive to the environment, while audible sound, as a physical and environmental factor during the entire process, is always ignored. We have previously reported that protein crystallization can be affected by a computer-generated monotonous sound with fixed frequency and amplitude. However, real-world sounds are not so simple but are complicated by parameters (frequency, amplitude, timbre, etc.) that vary over time. In this work, from three sound categories (music, speech, and environmental sound), we selected 26 different sounds and evaluated their effects on protein crystallization. The correlation between the sound parameters and the crystallization success rate was studied mathematically. The results showed that the real-world sounds, similar to the artificial monotonous sounds, could not only affect protein crystallization, but also improve crystal quality. Crystallization was dependent not only on the frequency, amplitude, volume, irradiation time, and overall energy of the sounds but also on their spectral characteristics. Based on these results, we suggest that intentionally applying environmental sound may be a simple and useful tool to promote protein crystallization.
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Affiliation(s)
- Chen-Yan Zhang
- Institute for Special Environmental Biophysics, Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China
| | - Yue Liu
- Institute for Special Environmental Biophysics, Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China
| | - Xu-Hua Tian
- School of Marine Sciences and Technology, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China
| | - Wen-Jing Liu
- Institute for Special Environmental Biophysics, Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China
| | - Xiao-Yu Li
- The College of Life Sciences, Northwest University, Xi'an 710069, Shaanxi, PR China
| | - Li-Xue Yang
- School of Marine Sciences and Technology, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China
| | - Han-Jun Jiang
- Institute for Special Environmental Biophysics, Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China
| | - Chong Han
- Institute for Special Environmental Biophysics, Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China
| | - Ke-An Chen
- School of Marine Sciences and Technology, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China.
| | - Da-Chuan Yin
- Institute for Special Environmental Biophysics, Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, PR China.
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7
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Yan EK, Lu QQ, Zhang CY, Liu YL, He J, Chen D, Wang B, Zhou RB, Wu P, Yin DC. Preparation of cross-linked hen-egg white lysozyme crystals free of cracks. Sci Rep 2016; 6:34770. [PMID: 27703210 PMCID: PMC5050519 DOI: 10.1038/srep34770] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 09/19/2016] [Indexed: 11/29/2022] Open
Abstract
Cross-linked protein crystals (CLPCs) are very useful materials in applications such as biosensors, catalysis, and X-ray crystallography. Hence, preparation of CLPCs is an important research direction. During the preparation of CLPCs, an often encountered problem is that cracks may appear in the crystals, which may finally lead to shattering of the crystals into small pieces and cause problem in practical applications. To avoid cross-link induced cracking, it is necessary to study the cracking phenomenon in the preparation process. In this paper, we present an investigation on how to avoid cracking during preparation of CLPCs. An orthogonal experiment was designed to study the phenomenon of cross-link induced cracking of hen-egg white lysozyme (HEWL) crystals against five parameters (temperature, solution pH, crystal growth time, glutaraldehyde concentration, and cross-linking time). The experimental results showed that, the solution pH and crystal growth time can significantly affect cross-link induced cracking. The possible mechanism was studied, and optimized conditions for obtaining crack-free CLPCs were obtained and experimentally verified.
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Affiliation(s)
- Er-Kai Yan
- Institute for Special Environmental Biophysics, Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, P. R. China
| | - Qin-Qin Lu
- Institute for Special Environmental Biophysics, Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, P. R. China
| | - Chen-Yan Zhang
- Institute for Special Environmental Biophysics, Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, P. R. China
| | - Ya-Li Liu
- Institute for Special Environmental Biophysics, Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, P. R. China
| | - Jin He
- Institute for Special Environmental Biophysics, Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, P. R. China
| | - Da Chen
- Institute for Special Environmental Biophysics, Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, P. R. China
| | - Bo Wang
- Institute for Special Environmental Biophysics, Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, P. R. China
| | - Ren-Bin Zhou
- Institute for Special Environmental Biophysics, Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, P. R. China
| | - Ping Wu
- Institute for Special Environmental Biophysics, Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, P. R. China
| | - Da-Chuan Yin
- Institute for Special Environmental Biophysics, Key Laboratory for Space Bioscience and Biotechnology, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, P. R. China
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8
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Stauber M, Jakoncic J, Berger J, Karp JM, Axelbaum A, Sastow D, Buldyrev SV, Hrnjez BJ, Asherie N. Crystallization of lysozyme with (R)-, (S)- and (RS)-2-methyl-2,4-pentanediol. ACTA CRYSTALLOGRAPHICA. SECTION D, BIOLOGICAL CRYSTALLOGRAPHY 2015; 71:427-41. [PMID: 25760593 PMCID: PMC4356360 DOI: 10.1107/s1399004714025061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Accepted: 11/15/2014] [Indexed: 11/10/2022]
Abstract
Chiral control of crystallization has ample precedent in the small-molecule world, but relatively little is known about the role of chirality in protein crystallization. In this study, lysozyme was crystallized in the presence of the chiral additive 2-methyl-2,4-pentanediol (MPD) separately using the R and S enantiomers as well as with a racemic RS mixture. Crystals grown with (R)-MPD had the most order and produced the highest resolution protein structures. This result is consistent with the observation that in the crystals grown with (R)-MPD and (RS)-MPD the crystal contacts are made by (R)-MPD, demonstrating that there is preferential interaction between lysozyme and this enantiomer. These findings suggest that chiral interactions are important in protein crystallization.
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Affiliation(s)
- Mark Stauber
- Department of Physics, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
- Department of Biology, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
| | - Jean Jakoncic
- National Synchrotron Light Source, Brookhaven National Laboratory, Building 725D, Upton, NY 11973-5000, USA
| | - Jacob Berger
- Department of Physics, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
- Department of Biology, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
| | - Jerome M. Karp
- Department of Physics, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
- Department of Biology, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
| | - Ariel Axelbaum
- Department of Physics, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
- Department of Biology, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
| | - Dahniel Sastow
- Department of Physics, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
- Department of Biology, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
| | - Sergey V. Buldyrev
- Department of Physics, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
| | - Bruce J. Hrnjez
- Collegiate School, 260 West 78th Street, New York, NY 10024-6559, USA
| | - Neer Asherie
- Department of Physics, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
- Department of Biology, Yeshiva University, 2495 Amsterdam Avenue, New York, NY 10033-3312, USA
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9
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Yan EK, Cao HL, Zhang CY, Lu QQ, Ye YJ, He J, Huang LJ, Yin DC. Cross-linked protein crystals by glutaraldehyde and their applications. RSC Adv 2015. [DOI: 10.1039/c5ra01722j] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
The mechanism of cross-linked protein crystals using glutaraldehyde, and their properties and applications are discussed in detail.
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Affiliation(s)
- Er-Kai Yan
- Institute for Special Environmental Biophysics
- Key Laboratory for Space Bioscience and Space Biotechnology
- School of Life Sciences
- Northwestern Polytechnical University
- Xi'an 710072
| | - Hui-Ling Cao
- Institute for Special Environmental Biophysics
- Key Laboratory for Space Bioscience and Space Biotechnology
- School of Life Sciences
- Northwestern Polytechnical University
- Xi'an 710072
| | - Chen-Yan Zhang
- Institute for Special Environmental Biophysics
- Key Laboratory for Space Bioscience and Space Biotechnology
- School of Life Sciences
- Northwestern Polytechnical University
- Xi'an 710072
| | - Qin-Qin Lu
- Institute for Special Environmental Biophysics
- Key Laboratory for Space Bioscience and Space Biotechnology
- School of Life Sciences
- Northwestern Polytechnical University
- Xi'an 710072
| | - Ya-Jing Ye
- Institute for Special Environmental Biophysics
- Key Laboratory for Space Bioscience and Space Biotechnology
- School of Life Sciences
- Northwestern Polytechnical University
- Xi'an 710072
| | - Jin He
- Institute for Special Environmental Biophysics
- Key Laboratory for Space Bioscience and Space Biotechnology
- School of Life Sciences
- Northwestern Polytechnical University
- Xi'an 710072
| | - Lin-Jun Huang
- Institute for Special Environmental Biophysics
- Key Laboratory for Space Bioscience and Space Biotechnology
- School of Life Sciences
- Northwestern Polytechnical University
- Xi'an 710072
| | - Da-Chuan Yin
- Institute for Special Environmental Biophysics
- Key Laboratory for Space Bioscience and Space Biotechnology
- School of Life Sciences
- Northwestern Polytechnical University
- Xi'an 710072
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10
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Liang M, Su R, Huang R, Qi W, Yu Y, Wang L, He Z. Facile in situ synthesis of silver nanoparticles on procyanidin-grafted eggshell membrane and their catalytic properties. ACS APPLIED MATERIALS & INTERFACES 2014; 6:4638-49. [PMID: 24624939 DOI: 10.1021/am500665p] [Citation(s) in RCA: 109] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Facile, efficient, and robust immobilization of metal nanostructures on porous bioscaffolds is an interesting topic in materials chemistry and heterogeneous catalysis. This study reports a facile in situ method for the synthesis and immobilization of small silver nanoparticles (AgNPs) at room temperature on natural eggshell membrane (ESM), which presents interwoven fibrous structure and can be used as a unique protein-based biotemplate. Procyanidin (Pro), a typical plant polyphenol extracted from grape seeds and skins, was first grafted onto ESM fibers to serve as both reductant and stabilizer during the synthesis process. As a result, the AgNPs were facilely synthesized and robustly immobilized on the ESM fibers without additional chemical reductant or physical treatments. The morphology and microstructure of the as-prepared AgNPs@Pro-ESM composites were characterized by combined microscopy and spectroscopy technologies. The results indicate that small AgNPs with mean diameter of 2.46 nm were successfully prepared on the Pro-ESM biotemplate. The composites exhibited good catalytic activity toward the reduction of 4-nitrophenol (4-NP). More importantly, these composite catalysts can be easily recovered and reused for more than eight cycles because of their high stability.
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Affiliation(s)
- Miao Liang
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University , Tianjin 300072, P. R. China
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11
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Sang-Il Kwon J, Nayhouse M, Christofides PD, Orkoulas G. Modeling and control of shape distribution of protein crystal aggregates. Chem Eng Sci 2013. [DOI: 10.1016/j.ces.2013.09.026] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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12
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Liang M, Wang L, Liu X, Qi W, Su R, Huang R, Yu Y, He Z. Cross-linked lysozyme crystal templated synthesis of Au nanoparticles as high-performance recyclable catalysts. NANOTECHNOLOGY 2013; 24:245601. [PMID: 23680924 DOI: 10.1088/0957-4484/24/24/245601] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Bio-nanomaterials fabricated using a bioinspired templating technique represent a novel class of composite materials with diverse applications in biomedical, electronic devices, drug delivery, and catalysis. In this study, Au nanoparticles (NPs) are synthesized within the solvent channels of cross-linked lysozyme crystals (CLLCs) in situ without the introduction of extra chemical reagents or physical treatments. The as-prepared AuNPs-in-protein crystal hybrid materials are characterized by light microscopy, transmission electron microscopy, x-ray diffraction, and Fourier-transform infrared spectroscopy analyses. Small AuNPs with narrow size distribution reveal the restriction effects of the porous structure in the lysozyme crystals. These composite materials are proven to be active heterogeneous catalysts for the reduction of 4-nitrophenol to 4-aminophenol. These catalysts can be easily recovered and reused at least 20 times because of the physical stability and macro-dimension of CLLCs. This work is the first to use CLLCs as a solid biotemplate for the preparation of recyclable high-performance catalysts.
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Affiliation(s)
- Miao Liang
- State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Membrane Science and Desalination Technology, School of Chemical Engineering and Technology, Tianjin University, Nankai District, Tianjin, People's Republic of China
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13
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Liang M, Wang L, Su R, Qi W, Wang M, Yu Y, He Z. Synthesis of silver nanoparticles within cross-linked lysozyme crystals as recyclable catalysts for 4-nitrophenol reduction. Catal Sci Technol 2013. [DOI: 10.1039/c3cy00157a] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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