1
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Lakavathu M, Zhao Y. Direct Synthesis of Artificial Esterase through Molecular Imprinting Using a Substrate-Mimicking Acylthiourea Template. J Org Chem 2024; 89:15336-15340. [PMID: 39382034 DOI: 10.1021/acs.joc.4c01789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2024]
Abstract
Most reported artificial esterases hydrolyze only activated esters. We here report a one-pot synthesis of artificial esterases via molecular imprinting. An acylthiourea template hydrogen bonds with 4-vinylbenzoic acid and coordinates to a polymerizable zinc complex inside a cross-linkable surfactant micelle. Double cross-linking of the micelle yields a polymeric nanoparticle catalyst that mimics a metalloenzyme to activate a water molecule for nucleophilic attack on the bound ester. The catalyst hydrolyzes both activated and unactivated esters under mild conditions with selectivity.
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Affiliation(s)
- Mohan Lakavathu
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, United States
| | - Yan Zhao
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, United States
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2
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Ashrafi AM, Mukherjee A, Saadati A, Matysik FM, Richtera L, Adam V. Enhancing the substrate selectivity of enzyme mimetics in biosensing and bioassay: Novel approaches. Adv Colloid Interface Sci 2024; 331:103233. [PMID: 38924801 DOI: 10.1016/j.cis.2024.103233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 06/06/2024] [Accepted: 06/10/2024] [Indexed: 06/28/2024]
Abstract
A substantial development in nanoscale materials possessing catalytic activities comparable with natural enzymes has been accomplished. Their advantages were owing to the excellent sturdiness in an extreme environment, possibilities of their large-scale production resulting in higher profitability, and easy manipulation for modification. Despite these advantages, the main challenge for artificial enzyme mimetics is the lack of substrate selectivity where natural enzymes flourish. This review addresses this vital problem by introducing substrate selectivity strategies to three classes of artificial enzymes: molecularly imprinted polymers, nanozymes (NZs), and DNAzymes. These rationally designed strategies enhance the substrate selectivity and are discussed and exemplified throughout the review. Various functional mechanisms associated with applying enzyme mimetics in biosensing and bioassays are also given. Eventually, future directives toward enhancing the substrate selectivity of biomimetics and related challenges are discussed and evaluated based on their efficiency and convenience in biosensing and bioassays.
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Affiliation(s)
- Amir M Ashrafi
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; Institute of Photonics and Electronics, Czech Academy of Sciences, Prague, Czech Republic.
| | - Atripan Mukherjee
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; ELI Beamlines Facility, The Extreme Light Infrastructure ERIC, Za Radnici 835, 252 41 Dolni Brezany, Czech Republic.
| | - Arezoo Saadati
- Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic.
| | - Frank-Michael Matysik
- Institute of Analytical Chemistry, Chemo- and Biosensors, University Regensburg, 93053 Regensburg, Germany.
| | - Lukas Richtera
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic.
| | - Vojtech Adam
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic.
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3
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Huynh CM, Mavliutova L, Sparrman T, Sellergren B, Irgum K. Elucidation of the Binding Orientation in α2,3- and α2,6-Linked Neu5Ac-Gal Epitopes toward a Hydrophilic Molecularly Imprinted Monolith. ACS OMEGA 2023; 8:44238-44249. [PMID: 38027366 PMCID: PMC10666243 DOI: 10.1021/acsomega.3c06836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 10/20/2023] [Accepted: 10/23/2023] [Indexed: 12/01/2023]
Abstract
N-Acetylneuraminic acid and its α2,3/α2,6-glycosidic linkages with galactose (Neu5Ac-Gal) are major carbohydrate antigen epitopes expressed in various pathological processes, such as cancer, influenza, and SARS-CoV-2. We here report a strategy for the synthesis and binding investigation of molecularly imprinted polymers (MIPs) toward α2,3 and α2,6 conformations of Neu5Ac-Gal antigens. Hydrophilic imprinted monoliths were synthesized from melamine monomer in the presence of four different templates, namely, N-acetylneuraminic acid (Neu5Ac), N-acetylneuraminic acid methyl ester (Neu5Ac-M), 3'-sialyllactose (3SL), and 6'-sialyllactose (6SL), in a tertiary solvent mixture at temperatures varying from -20 to +80 °C. The MIPs prepared at cryotemperatures showed a preferential affinity for the α2,6 linkage sequence of 6SL, with an imprinting factor of 2.21, whereas the α2,3 linkage sequence of 3SL resulted in nonspecific binding to the polymer scaffold. The preferable affinity for the α2,6 conformation of Neu5Ac-Gal was evident also when challenged by a mixture of other mono- and disaccharides in an aqueous test mixture. The use of saturation transfer difference nuclear magnetic resonance (STD-NMR) on suspensions of crushed monoliths allowed for directional interactions between the α2,3/α2,6 linkage sequences on their corresponding MIPs to be revealed. The Neu5Ac epitope, containing acetyl and polyalcohol moieties, was the major contributor to the sequence recognition for Neu5Ac(α2,6)Gal(β1,4)Glc, whereas contributions from the Gal and Glc segments were substantially lower.
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Affiliation(s)
- Chau Minh Huynh
- Department
of Chemistry, Umeå University, S-90187 Umeå, Sweden
| | - Liliia Mavliutova
- Department
of Biomedical Sciences, Faculty of Health and Society, Malmö University, SE-20506 Malmö, Sweden
| | - Tobias Sparrman
- Department
of Chemistry, Umeå University, S-90187 Umeå, Sweden
| | - Börje Sellergren
- Department
of Biomedical Sciences, Faculty of Health and Society, Malmö University, SE-20506 Malmö, Sweden
| | - Knut Irgum
- Department
of Chemistry, Umeå University, S-90187 Umeå, Sweden
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4
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Bahrami F, Zhao Y. Carbonic anhydrase mimics with rationally designed active sites for fine-tuned catalytic activity and selectivity in ester hydrolysis. Catal Sci Technol 2023; 13:5702-5709. [PMID: 38013842 PMCID: PMC10544069 DOI: 10.1039/d3cy00704a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 08/21/2023] [Indexed: 11/29/2023]
Abstract
Numerous hydrolytic enzymes utilize zinc as a cofactor for catalysis. We here report water-soluble polymeric nanoparticles with zinc ions in active sites and a nearby base as a mimic of carbonic anhydrase (CA). Their pKa of 6.3-6.4 for zinc-bound water is lower than the 6.8-7.3 value for natural enzymes, which allows the catalyst to hydrolyze nonactivated alkyl esters under neutral conditions-a long sought-after goal for artificial esterases. The size and shape of the active site can be rationally tuned through a template used in molecular imprinting. Subtle structural changes in the template, including shifting an ethyl group by one C-N bond and removal of a methylene group, correlate directly with catalytic activity. A catalyst can be made to be highly specific or have broad substrate specificity through modular synthesis of templates.
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Affiliation(s)
- Foroogh Bahrami
- Department of Chemistry, Iowa State University Ames Iowa 50011-3111 USA +1 515 294 0105 +1 515 294 5845
| | - Yan Zhao
- Department of Chemistry, Iowa State University Ames Iowa 50011-3111 USA +1 515 294 0105 +1 515 294 5845
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5
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Bose I, Bahrami F, Zhao Y. Artificial Esterase for Cooperative Catalysis of Ester Hydrolysis at pH 7. MATERIALS TODAY. CHEMISTRY 2023; 30:101576. [PMID: 37997572 PMCID: PMC10665026 DOI: 10.1016/j.mtchem.2023.101576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2023]
Abstract
Ester is one of the most prevalent functional groups in natural and man-made products. Natural esterases hydrolyze nonactivated alkyl esters readily but artificial esterases generally use highly activated p-nitrophenyl esters as substrates. We report synthetic esterases constructed through molecular imprinting in cross-linked micelles. The water-soluble nanoparticle catalysts contain a thiouronium cation to mimic the oxyanion hole and a nearby base to assist the hydrolysis. Whereas this catalytic motif readily affords large rate acceleration for the hydrolysis of p-nitrophenyl hexanoate, nonactivated cyclopentyl hexanoate demands catalytic groups that can generate a strong nucleophile (hydroxide) in the active site. The hydroxide is stabilized by the protonated base when the external solution is at pH 7, enabling the hydrolysis of activated and nonactivated esters under neutral conditions.
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Affiliation(s)
- Ishani Bose
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, USA
| | - Foroogh Bahrami
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, USA
| | - Yan Zhao
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, USA
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6
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Arifuzzaman MD, Zhao Y. Selective Hydrolysis of Nonactivated Aryl Esters at pH 7 through Cooperative Catalysis. J Org Chem 2023; 88:3282-3287. [PMID: 36795622 PMCID: PMC10183976 DOI: 10.1021/acs.joc.2c02570] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Most reported artificial esterases only hydrolyze highly activated substrates. We here report synthetic catalysts that hydrolyze nonactivated aryl esters at pH 7, via cooperative action of a thiourea group that mimics the oxyanion hole of a serine protease and a nearby nucleophilic/basic pyridyl group. The molecularly imprinted active site distinguishes subtle structural changes in the substrate, including elongation of the acyl chain by two carbons or shift of a remote methyl group by one carbon.
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Affiliation(s)
- M D Arifuzzaman
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, United States
| | - Yan Zhao
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, United States
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7
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Arifuzzaman MD, Bose I, Bahrami F, Zhao Y. Imprinted Polymeric Nanoparticles as Artificial Enzymes for Ester Hydrolysis at Room Temperature and pH 7. CHEM CATALYSIS 2022; 2:2049-2065. [PMID: 38098612 PMCID: PMC10720975 DOI: 10.1016/j.checat.2022.06.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2023]
Abstract
Natural esterases hydrolyze esters under physiological pHs but chemists often have to use strongly acidic or basic conditions for the same hydrolysis. We report synthetic nanoparticle catalysts that hydrolyze nonactivated alkyl esters at room temperature and neutral pH, with enzyme-like catalytic mechanisms and exquisite substrate selectivity. Unlike natural enzymes that denature easily at elevated temperatures, the synthetic catalysts become more active at higher temperatures.
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Affiliation(s)
| | | | - Foroogh Bahrami
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, U.S.A
| | - Yan Zhao
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, U.S.A
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8
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Chen K, Zhao Y. Dynamic Tuning in Synthetic Glycosidase for Selective Hydrolysis of Alkyl and Aryl Glycosides. J Org Chem 2022; 87:4195-4203. [PMID: 35254827 PMCID: PMC9089355 DOI: 10.1021/acs.joc.1c03029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Enzymes use sophisticated conformational control to optimize the dynamics of their protein framework for efficient catalysis. Although it is difficult to employ a similar strategy to improve catalysis in a synthetic enzyme, we here report that modulation of the dynamics of the substrate in the active site is readily achievable in a complex between a molecularly imprinted nanoparticle and its acid cofactor, through tuning of the size and shape of the imprinted site. As the alkyl glucoside substrate is bound with increasing strength and held in a more tightly fitted pocket, the acid-catalyzed glycan hydrolysis becomes more difficult. A larger, wider active site, although less able to bind the substrate, affords a higher catalytic activity, likely due to easier alignment of the substrate and the acid cofactor for a general acid catalysis. The substrate selectivity is controlled by both the tightness of the aglycon-binding site and the orientation of the glycan-binding boroxole group.
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Affiliation(s)
- Kaiqian Chen
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, United States
| | - Yan Zhao
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, United States
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9
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Tian R, Li Y, Xu J, Hou C, Luo Q, Liu J. Recent development in the design of artificial enzymes through molecular imprinting technology. J Mater Chem B 2022; 10:6590-6606. [DOI: 10.1039/d2tb00276k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Enzymes, a class of proteins or RNA with high catalytic efficiency and specificity, have inspired generations of scientists to develop enzyme mimics with similar capabilities. Many enzyme mimics have been...
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10
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Cardoso AR, Frasco MF, Serrano V, Fortunato E, Sales MGF. Molecular Imprinting on Nanozymes for Sensing Applications. BIOSENSORS 2021; 11:152. [PMID: 34067985 PMCID: PMC8152260 DOI: 10.3390/bios11050152] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 04/29/2021] [Accepted: 05/07/2021] [Indexed: 06/12/2023]
Abstract
As part of the biomimetic enzyme field, nanomaterial-based artificial enzymes, or nanozymes, have been recognized as highly stable and low-cost alternatives to their natural counterparts. The discovery of enzyme-like activities in nanomaterials triggered a broad range of designs with various composition, size, and shape. An overview of the properties of nanozymes is given, including some examples of enzyme mimics for multiple biosensing approaches. The limitations of nanozymes regarding lack of selectivity and low catalytic efficiency may be surpassed by their easy surface modification, and it is possible to tune specific properties. From this perspective, molecularly imprinted polymers have been successfully combined with nanozymes as biomimetic receptors conferring selectivity and improving catalytic performance. Compelling works on constructing imprinted polymer layers on nanozymes to achieve enhanced catalytic efficiency and selective recognition, requisites for broad implementation in biosensing devices, are reviewed. Multimodal biomimetic enzyme-like biosensing platforms can offer additional advantages concerning responsiveness to different microenvironments and external stimuli. Ultimately, progress in biomimetic imprinted nanozymes may open new horizons in a wide range of biosensing applications.
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Affiliation(s)
- Ana R. Cardoso
- BioMark@UC, Faculty of Sciences and Technology, University of Coimbra, 3030-790 Coimbra, Portugal; (A.R.C.); (M.F.F.); (V.S.)
- BioMark@ISEP, School of Engineering, Polytechnic Institute of Porto, 4249-015 Porto, Portugal
- CEB, Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
- i3N/CENIMAT, Department of Materials Science, Faculty of Sciences and Technology, Universidade NOVA de Lisboa and CEMOP/UNINOVA, 2829-516 Caparica, Portugal;
| | - Manuela F. Frasco
- BioMark@UC, Faculty of Sciences and Technology, University of Coimbra, 3030-790 Coimbra, Portugal; (A.R.C.); (M.F.F.); (V.S.)
- BioMark@ISEP, School of Engineering, Polytechnic Institute of Porto, 4249-015 Porto, Portugal
- CEB, Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
| | - Verónica Serrano
- BioMark@UC, Faculty of Sciences and Technology, University of Coimbra, 3030-790 Coimbra, Portugal; (A.R.C.); (M.F.F.); (V.S.)
- BioMark@ISEP, School of Engineering, Polytechnic Institute of Porto, 4249-015 Porto, Portugal
- CEB, Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
| | - Elvira Fortunato
- i3N/CENIMAT, Department of Materials Science, Faculty of Sciences and Technology, Universidade NOVA de Lisboa and CEMOP/UNINOVA, 2829-516 Caparica, Portugal;
| | - Maria Goreti Ferreira Sales
- BioMark@UC, Faculty of Sciences and Technology, University of Coimbra, 3030-790 Coimbra, Portugal; (A.R.C.); (M.F.F.); (V.S.)
- BioMark@ISEP, School of Engineering, Polytechnic Institute of Porto, 4249-015 Porto, Portugal
- CEB, Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal
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11
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Bose I, Zhao Y. Selective Hydrolysis of Aryl Esters under Acidic and Neutral Conditions by a Synthetic Aspartic Protease Mimic. ACS Catal 2021; 11:3938-3942. [PMID: 34422449 PMCID: PMC8378761 DOI: 10.1021/acscatal.1c00371] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Aspartic proteases use a pair of carboxylic acids to activate water molecules for nucleophilic attack. Here we report a nanoparticle catalyst with a similar catalytic motif capable of generating a hydroxide ion in its active site even under acidic reaction conditions. The synthetic enzyme accelerated the hydrolysis of para-nitrophenyl acetate (PNPA) by 91,000 times and could also hydrolyze nonactivated aryl esters at pH 7. The distance between the two acids and, in particular, the flexibility of the catalytic groups in the active site controlled the catalytic efficiency. The synthetic enzyme readily detected the addition of a single methyl on the acyl group of the substrate, as well as the substitution pattern on the phenyl ring.
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Affiliation(s)
- Ishani Bose
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, United States
| | - Yan Zhao
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, United States
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12
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Alhendawi H, Brunet E, Payán ER, Alkahlout H. Novel optically active 2D materials based on λ-zirconium phosphate and chiral monocarboxylic acids: Synthesis and characterization. J INCL PHENOM MACRO 2021. [DOI: 10.1007/s10847-021-01043-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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13
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Bose I, Fa S, Zhao Y. Tunable Artificial Enzyme-Cofactor Complex for Selective Hydrolysis of Acetals. J Org Chem 2021; 86:1701-1711. [PMID: 33397107 PMCID: PMC8170846 DOI: 10.1021/acs.joc.0c02519] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Enzymes frequently use unimpressive functional groups such as weak carboxylic acids for efficient, highly selective catalysis including hydrolysis of acetals and even amides. Much stronger acids generally have to be used for such purposes in synthetic systems. We report here a method to position an acidic group near the acetal oxygen of 2-(4-nitrophenyl)-1,3-dioxolane bound by an artificial enzyme. The hydrolytic activity of the resulting artificial enzyme-cofactor complex was tuned by the number and depth of the active site as well as the hydrophobicity and acidity of the cofactor. The selectivity of the complex was controlled by the size and shape of the active site and enabled less reactive acetals to be hydrolyzed over more reactive ones.
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Affiliation(s)
- Ishani Bose
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111
| | - Shixin Fa
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111
| | - Yan Zhao
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111
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14
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15
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Li X, Zhao Y. Chiral Gating for Size- and Shape-Selective Asymmetric Catalysis. J Am Chem Soc 2019; 141:13749-13752. [PMID: 31368701 DOI: 10.1021/jacs.9b06619] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A poor or mediocre stereoselectivity is a key roadblock for a chiral catalyst to find practical adoptions. We report a facile method to create a tunable chiral space near a chiral catalyst to augment its selectivity. The space was created rationally through templated polymerization within cross-linked micelles, using readily available amino acid derivatives. It provided gated entrance of reactants to the catalyst, enabling a mediocre prolinamide to catalyze aldol condensation in water with excellent yields and ee, in a size- and shape-selective manner.
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Affiliation(s)
- Xiaowei Li
- Department of Chemistry , Iowa State University , Ames , Iowa 50011-3111 , United States
| | - Yan Zhao
- Department of Chemistry , Iowa State University , Ames , Iowa 50011-3111 , United States
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16
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Hu L, Zhao Y. A Bait‐and‐Switch Method for the Construction of Artificial Esterases for Substrate‐Selective Hydrolysis. Chemistry 2019; 25:7702-7710. [DOI: 10.1002/chem.201900560] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Lan Hu
- Department of ChemistryIowa State University Ames IA 50011-3111 USA
| | - Yan Zhao
- Department of ChemistryIowa State University Ames IA 50011-3111 USA
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17
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Mathew D, Thomas B, Devaky KS. Design, synthesis and characterization of enzyme-analogue-built polymer catalysts as artificial hydrolases. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2019; 47:1149-1172. [DOI: 10.1080/21691401.2019.1576703] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Divya Mathew
- School of Chemical Sciences, Mahatma Gandhi University, Kottayam, Kerala, India
| | - Benny Thomas
- School of Chemical Sciences, Mahatma Gandhi University, Kottayam, Kerala, India
- Department of Chemistry, St. Berchmans College, Changanassery, India
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18
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Jiménez-Andreu MM, Bueno-Morón J, Sayago FJ, Cativiela C, Tejero T, Merino P. 1-Aminovinylphosphonate Esters as Substrates for the Diels-Alder Reaction: First Synthetic and Theoretical Study. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801633] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- M. Mercedes Jiménez-Andreu
- Departamento de Química Orgánica; Instituto de Síntesis Química y Catálisis Homogénea (ISQCH); CSIC-Universidad de Zaragoza; 50009 Zaragoza Spain
| | - Jorge Bueno-Morón
- Departamento de Química Orgánica; Instituto de Síntesis Química y Catálisis Homogénea (ISQCH); CSIC-Universidad de Zaragoza; 50009 Zaragoza Spain
| | - Francisco J. Sayago
- Departamento de Química Orgánica; Instituto de Síntesis Química y Catálisis Homogénea (ISQCH); CSIC-Universidad de Zaragoza; 50009 Zaragoza Spain
| | - Carlos Cativiela
- Departamento de Química Orgánica; Instituto de Síntesis Química y Catálisis Homogénea (ISQCH); CSIC-Universidad de Zaragoza; 50009 Zaragoza Spain
| | - Tomás Tejero
- Departamento de Química Orgánica; Instituto de Síntesis Química y Catálisis Homogénea (ISQCH); CSIC-Universidad de Zaragoza; 50009 Zaragoza Spain
| | - Pedro Merino
- Instituto de Biocomputación y Física de Sistemas Complejos (BIFI); Universidad de Zaragoza; 50009 Zaragoza Spain
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19
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Nothling MD, Xiao Z, Bhaskaran A, Blyth MT, Bennett CW, Coote ML, Connal LA. Synthetic Catalysts Inspired by Hydrolytic Enzymes. ACS Catal 2018. [DOI: 10.1021/acscatal.8b03326] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Mitchell D. Nothling
- Department of Chemical and Biomolecular Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Zeyun Xiao
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, P. R. China
| | - Ayana Bhaskaran
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Mitchell T. Blyth
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Christopher W. Bennett
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Michelle L. Coote
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Luke A. Connal
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
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20
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Mathew D, Thomas B, Devaky K. Biomimetic recognition and peptidase activities of transition state analogue imprinted chymotrypsin mimics. REACT FUNCT POLYM 2018. [DOI: 10.1016/j.reactfunctpolym.2018.01.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Abdul-Quadir MS, Ferg EE, Tshentu ZR, Ogunlaja AS. Remarkable adsorptive removal of nitrogen-containing compounds from hydrotreated fuel by molecularly imprinted poly-2-(1 H-imidazol-2-yl)-4-phenol nanofibers. RSC Adv 2018; 8:8039-8050. [PMID: 35542008 PMCID: PMC9078548 DOI: 10.1039/c8ra00543e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Accepted: 02/14/2018] [Indexed: 11/21/2022] Open
Abstract
Molecularly imprinted polymer (MIP) nanofibers were prepared by the electrospinning of poly 2-(1H-imidazol-2-yl)-4-phenol (PIMH) in the presence of various nitrogen containing compounds (N-compounds). Molecularly imprinted polymer nanofibers show selectivity for various target model nitrogen-containing compounds with adsorption capacities of 11.7 ± 0.9 mg g-1, 11.9 ± 0.8 mg g-1 and 11.3 ± 1.1 mg g-1 for quinoline, pyrimidine and carbazole, respectively. Molecular modelling based upon density functional theory (DFT) indicated that hydrogen bond interactions may take place between the lone-pair nitrogen atom of model compounds (quinoline and pyrimidine) and the -OH and -NH groups of the PIMH nanofibers. The adsorption mode followed the Freundlich (multi-layered) adsorption isotherm, which indicated possible nitrogen-nitrogen compound interactions. Molecularly imprinted polymer nanofibers show potential for the removal of nitrogen-containing compounds in fuel.
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Affiliation(s)
- M S Abdul-Quadir
- Department of Chemistry, Nelson Mandela University P.O. Box 77000 Port Elizabeth 6031 South Africa +27 46 504 3061
| | - E E Ferg
- Department of Chemistry, Nelson Mandela University P.O. Box 77000 Port Elizabeth 6031 South Africa +27 46 504 3061
| | - Z R Tshentu
- Department of Chemistry, Nelson Mandela University P.O. Box 77000 Port Elizabeth 6031 South Africa +27 46 504 3061
| | - A S Ogunlaja
- Department of Chemistry, Nelson Mandela University P.O. Box 77000 Port Elizabeth 6031 South Africa +27 46 504 3061
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Abdul-quadir MS, van der Westhuizen R, Welthagen W, Ferg EE, Tshentu ZR, Ogunlaja AS. Adsorptive denitrogenation of fuel over molecularly imprinted poly-2-(1H-imidazol-2-yl)-4-phenol microspheres. NEW J CHEM 2018. [DOI: 10.1039/c8nj02818d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Molecularly imprinted poly 2-(1H-imidazol-2-yl)-4-phenol prepared by suspension polymerization of 2-(1H-imidazol-2-yl)-4-vinylphenol in the presence of selected nitrogen containing compounds showed adsorption selectivity for target nitrogen-containing compounds in fuel oil.
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Affiliation(s)
- M. S. Abdul-quadir
- Department of Chemistry
- Nelson Mandela University
- Port Elizabeth 6031
- South Africa
| | | | - W. Welthagen
- Analytical Technology
- Sasol Technology (Pty) Limited
- Sasolburg 1947
- South Africa
| | - E. E. Ferg
- Department of Chemistry
- Nelson Mandela University
- Port Elizabeth 6031
- South Africa
| | - Z. R. Tshentu
- Department of Chemistry
- Nelson Mandela University
- Port Elizabeth 6031
- South Africa
| | - A. S. Ogunlaja
- Department of Chemistry
- Nelson Mandela University
- Port Elizabeth 6031
- South Africa
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Geometrical effect of 3D-memory cavity on the imprinting efficiency of transition-state analogue-built artificial hydrolases. Polym Bull (Berl) 2017. [DOI: 10.1007/s00289-017-2237-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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24
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Divya M, Benny T, Christy P, Aparna EP, Devaky KS. Catalytic amidolysis of amino acid p-nitroanilides using transition state analogue imprinted artificial enzymes: Cooperative effect of pyridine moiety. Bioorg Chem 2017; 74:91-103. [PMID: 28772161 DOI: 10.1016/j.bioorg.2017.07.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Accepted: 07/25/2017] [Indexed: 10/19/2022]
Abstract
Enzyme-like polymer catalysts with the imprints of phosphonate transition state analogue (TSA) lined along with imidazole and pyridine moieties were synthesized using methacryloyl-l-histidine and 4-vinylpyridine as the functional monomers and phenyl-1-(N-benzyloxycarbonylamino)-2-(phenyl)ethyl phosphonate - the TSA of hydrolytic reaction as the template for the amidolysis of N-benzyloxycarbonyl-l-phenylalanine p-nitroanilide (Z-l-Phe-PNA). Polymers containing different functional groups can act together to provide catalytic activity and selectivity superior to what can be obtained from monofunctional analogues. The higher rate acceleration exhibited by the bifunctional polymer over the monofunctional polymers indicates cooperative catalysis of imidazole and pyridine moieties. The optimum catalytic competence is shown by the bifunctional polymer containing imidazole and pyridine moieties in 2:1M ratio which may be due to alignment of the functional groups in proper H-bond distance. In addition to the non-covalent interactions like hydrogen bonding or π-stacking interactions between the functional groups of the polymer and the template, 3D-microcavities complementary to the geometry of the template are necessary for effective shape selective binding. Michaelis-Menten kinetics implies that only the catalysts with imidazole moieties act as enzyme-like catalysts and imidazole is the key catalytic function of the enzyme mimics.
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Affiliation(s)
- Mathew Divya
- School of Chemical Sciences, Mahatma Gandhi University, Kottayam-686 560, India
| | - Thomas Benny
- School of Chemical Sciences, Mahatma Gandhi University, Kottayam-686 560, India; Department of Chemistry, St Berchmans College, Changanassery-686 101, India
| | - Philip Christy
- School of Chemical Sciences, Mahatma Gandhi University, Kottayam-686 560, India
| | - E P Aparna
- School of Chemical Sciences, Mahatma Gandhi University, Kottayam-686 560, India
| | - K S Devaky
- School of Chemical Sciences, Mahatma Gandhi University, Kottayam-686 560, India.
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25
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Philip C, Devaky K. Multiwalled carbon nanotubes with surface grafted transition state analogue imprints as chymotrypsin mimics for the hydrolysis of amino acid esters: Synthesis and kinetic studies. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.04.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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26
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Qian R, Horak J, Hammerschmidt F. Conversion of nitriles to 1-aminophosphonic acids and preparation of phosphahomocysteines of high enantiomeric excess. PHOSPHORUS SULFUR 2017. [DOI: 10.1080/10426507.2017.1284844] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Renzhe Qian
- Institute of Organic Chemistry, University of Vienna, Vienna, Austria
| | - Jeannie Horak
- Institute of Pharmaceutical Sciences, Pharmaceutical (Bio-)Analysis, Eberhard-Karls-University Tuebingen, Tuebingen, Germany
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Nakai S, Sunayama H, Kitayama Y, Nishijima M, Wada T, Inoue Y, Takeuchi T. Regioselective Molecularly Imprinted Reaction Field for [4 + 4] Photocyclodimerization of 2-Anthracenecarboxylic Acid. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:2103-2108. [PMID: 28177241 DOI: 10.1021/acs.langmuir.6b04104] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Molecularly imprinted cavities have functioned as a regioselective reaction field for the [4 + 4] photocyclodimerization of 2-anthracenecarboxylic acid (2-AC). Molecularly imprinted polymers were prepared by precipitation polymerization of N-methacryloyl-4-aminobenzamidine as a functional monomer to form a complex with template 2-AC and ethylene glycol dimethacrylate as a crosslinking monomer. The 2-AC-imprinted cavities thus constructed preferentially bound 2-AC with an affinity greater than that toward structurally related 9-anthracenecarboxylic acid, 2-aminoanthracene, and unsubstituted anthracene. Moreover, from the four possible regioisomeric cyclodimers, they mediated the [4 + 4] photocyclodimerization of 2-AC specifically to the anti-head-to-tail (anti-HT) isomer. This indicates that the imprinted cavities accommodate two 2-AC molecules in an anti-HT manner, thereby facilitating the subsequent regioselective photocyclodimerization.
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Affiliation(s)
- Satoshi Nakai
- Graduate School of Engineering, Kobe University , 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan
| | - Hirobumi Sunayama
- Graduate School of Engineering, Kobe University , 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan
| | - Yukiya Kitayama
- Graduate School of Engineering, Kobe University , 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan
| | | | - Takehiko Wada
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University , 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan
| | | | - Toshifumi Takeuchi
- Graduate School of Engineering, Kobe University , 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan
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Mathew D, Thomas B, Devaky K. Phosphonate TSA-built macromatric polymer catalysts as chymotrypsin mimics for the amidolysis of amino acid p-nitroanilides: Effect of the nature and extent of crosslinker on amidase activities. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.01.061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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29
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Shen X, Huang C, Shinde S, Jagadeesan KK, Ekström S, Fritz E, Sellergren B. Catalytic Formation of Disulfide Bonds in Peptides by Molecularly Imprinted Microgels at Oil/Water Interfaces. ACS APPLIED MATERIALS & INTERFACES 2016; 8:30484-30491. [PMID: 27750005 DOI: 10.1021/acsami.6b10131] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This work describes the preparation and investigation of molecularly imprinted polymer (MIP) microgel (MG) stabilized Pickering emulsions (PEs) for their ability to catalyze the formation of disulfide bonds in peptides at the O/W interface. The MIP MGs were synthesized via precipitation polymerization and a programmed initiator change strategy. The MIP MGs were characterized using DLS analysis, SEM measurement, and optical microscopy analysis. The dry and wet MIP MGs showed a hydrodynamic diameter of 100 and 280 nm, respectively. A template rebinding experiment showed that the MIP MGs bound over two times more template (24 mg g-1) compared to the uptake displayed by a nonimprinted reference polymer (NIP) MG (10 mg g-1) at saturation. Using the MIP MGs as stabilizers, catalytic oxidation systems were prepared by emulsifying the oil phase and water phase in the presence of different oxidizing agents. During the cyclization, the isolation of the thiol precursors and the oxidizing reagents nonselectively decreased the formation of the byproducts, while the imprinted cavities on the MIP MGs selectively promoted the intramolecular cyclization of peptides. When I2 was used as the oxidizing agent, the MIP-PE-I2 system showed a product yield of 50%, corresponding to a nearly 2-fold increase compared to that of the nonimprinted polymer NIP-PE-I2 system (26%). We believe the interfacial catalysis system presented in this work may offer significant benefits in synthetic peptide chemistry by raising productivity while suppressing the formation of byproducts.
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Affiliation(s)
- Xiantao Shen
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubation), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology , Hangkong Road #13, Wuhan, Hubei 430030, China
- Department of Biomedical Sciences, Faculty of Health and Society, Malmö University , SE20506 Malmö, Sweden
- G&T Septech AS , P.O. Box 33, 1917 Ytre Enebakk, Norway
| | - Chuixiu Huang
- Department of Biomedical Sciences, Faculty of Health and Society, Malmö University , SE20506 Malmö, Sweden
- School of Pharmacy, University of Oslo , P.O. Box 1068, 0316 Blindern Oslo, Norway
- G&T Septech AS , P.O. Box 33, 1917 Ytre Enebakk, Norway
| | - Sudhirkumar Shinde
- Department of Biomedical Sciences, Faculty of Health and Society, Malmö University , SE20506 Malmö, Sweden
| | | | - Simon Ekström
- Department of Biomedical Engineering, Lund University , 221 00 Lund, Sweden
| | - Emelie Fritz
- INFU, Technische Universität Dortmund , 44221 Dortmund, Germany
| | - Börje Sellergren
- Department of Biomedical Sciences, Faculty of Health and Society, Malmö University , SE20506 Malmö, Sweden
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Wang S, Qiu D, Mo F, Zhang Y, Wang J. Metal-Free Aromatic Carbon–Phosphorus Bond Formation via a Sandmeyer-Type Reaction. J Org Chem 2016; 81:11603-11611. [DOI: 10.1021/acs.joc.6b01820] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shuai Wang
- Beijing National Laboratory
of Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry
and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Di Qiu
- Beijing National Laboratory
of Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry
and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Fanyang Mo
- Beijing National Laboratory
of Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry
and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Yan Zhang
- Beijing National Laboratory
of Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry
and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Jianbo Wang
- Beijing National Laboratory
of Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry
and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
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31
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Mathew D, Thomas B, Devaky K. Amidase activity of phosphonate analogue imprinted chymotrypsin mimics in shape-selective, substrate-specific and enantioselective amidolysis of l -phenylalanine- p -nitroanilides. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcata.2016.01.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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32
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Ma X, Meng Z, Qiu L, Chen J, Guo Y, Yi D, Ji T, Jia H, Xue M. Solanesol extraction from tobacco leaves by Flash chromatography based on molecularly imprinted polymers. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1020:1-5. [PMID: 26994329 DOI: 10.1016/j.jchromb.2016.03.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 03/05/2016] [Accepted: 03/07/2016] [Indexed: 01/02/2023]
Abstract
A novel solanesol extraction method based on molecularly imprinted polymer (MIP) as the Flash chromatography stationary phase was established and evaluated. Spherical MIP particles in a size range of 250-350 μm (d (0.5)=320 μm) for solanesol were synthesized by suspension polymerization, with imprinting factor of 3.9. The MIP particles (5.5 g) were packed in common Teflon column as the stationary phase while the sample solution and elution solvent were confirmed as methanol and methanol/acetic acid solution (80/20, v/v), loading at 4 ml/min and eluting 8 ml/min, respectively. Under the optimal chromatographic conditions, the adsorption capacity of the MIP-Flash column was determined as 107.3 μmol/g, and in each process, 370.8 mg purified solanesol (98.4%) could be obtained from the extract (20 mM, 40 ml) of tobacco leaves (14.7 g), and the yield of solanesol was 2.5% of the dry weight of tobacco leaves. The results reported here confirm the feasibility to extract highly purified active ingredients directly from natural products on a large scale by MIP-Flash chromatography.
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Affiliation(s)
- Xiaoqin Ma
- School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China
| | - Zihui Meng
- School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China
| | - Lili Qiu
- School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China
| | - Jing Chen
- School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China
| | - Yushu Guo
- Navy General Hospital, Beijing 100048, China
| | - Da Yi
- School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China
| | - Tiantian Ji
- School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China
| | - Hua Jia
- School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China
| | - Min Xue
- School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China.
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33
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Kazemi S, Daryani AS, Abdouss M, Shariatinia Z. DFT computations on the hydrogen bonding interactions between methacrylic acid-trimethylolpropane trimethacrylate copolymers and letrozole as drug delivery systems. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2016. [DOI: 10.1142/s0219633616500152] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The hydrogen bonding interactions between letrozole (Let) anticancer drug and three copolymers of methacrylic acid-trimethylolpropane trimethacrylate (M1–M3 as molecular imprinted polymers) were studied using density functional theory (DFT) at both B3LYP and B3PW91 levels. The binding energies were corrected for the basis set superposition error (BSSE) and zero-point vibrational energies (ZPVE) so that the most negative [Formula: see text] were measured for compounds 7 and 8 formed between M1 copolymer and endocyclic N1 and N2 atoms of drug, respectively. Also, among complexes 13–15 in which two copolymers were contributed in the formation of O–H[Formula: see text]N bonds with the drug, compound 13 (containing two M1 copolymers) showed the highest [Formula: see text] value. The interactions of all copolymers with drug were exergonic (spontaneous interaction) and exothermic. The QTAIM data supported the covalent character of the C–N, C–H, N–N, C–O, O–H and O–H[Formula: see text]N bonds, the intermediate nature of C[Formula: see text]N and C[Formula: see text]O bonds while the electrostatic character of C–H[Formula: see text]O, HC[Formula: see text]HC and CH[Formula: see text]N interactions. According to the [Formula: see text], [Formula: see text] and [Formula: see text] values, it was suggested that t complexes 7 and 8 (among two particles systems) as well as complex 13 (among three particles systems) can be the most promising drug delivery systems.
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Affiliation(s)
- Saeedeh Kazemi
- Department of Chemistry, Amirkabir University of Technology (Tehran Polytechnic), P. O. Box: 15875-4413, Tehran, Iran
| | - Aliasghar Sarabi Daryani
- Department of Polymer Engineering & Color Technology, Amirkabir University of Technology (Tehran Polytechnic), P. O. Box: 15875-4413, Tehran, Iran
| | - Majid Abdouss
- Department of Chemistry, Amirkabir University of Technology (Tehran Polytechnic), P. O. Box: 15875-4413, Tehran, Iran
| | - Zahra Shariatinia
- Department of Chemistry, Amirkabir University of Technology (Tehran Polytechnic), P. O. Box: 15875-4413, Tehran, Iran
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Dadfarnia S, Haji Shabani AM, Dehghanpoor Frashah S. Synthesis and application of a nanoporous ion-imprinted polymer for the separation and preconcentration of trace amounts of vanadium from food samples before determination by electrothermal atomic absorption spectrometry. J Sep Sci 2016; 39:1509-17. [DOI: 10.1002/jssc.201501301] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Revised: 01/26/2016] [Accepted: 01/31/2016] [Indexed: 11/07/2022]
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Electropolymerized molecularly imprinted polypyrrole film for sensing of clofibric acid. SENSORS 2015; 15:4870-89. [PMID: 25730487 PMCID: PMC4435163 DOI: 10.3390/s150304870] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2015] [Revised: 02/15/2015] [Accepted: 02/16/2015] [Indexed: 01/08/2023]
Abstract
Piezoelectric quartz crystals and analogous gold substrates were electrochemically coated with molecularly imprinted polypyrrole films for pulsed amperometric detection (PAD) of clofibric acid, a metabolite of clofibrate. Cyclic voltammetry data obtained during polymerization and deposited weight estimations revealed a decrease of the polymerization rate with increasing clofibric acid concentration. XPS measurements indicated that clofibric acid could be removed after imprinting with an aqueous ethanol solution, which was further optimized by using PAD. Zeta potential and contact angle measurements revealed differences between molecularly imprinted (MIP) and non-imprinted polymer (NIP) layers. Binding experiments with clofibric acid and other substances showed a pronounced selectivity of the MIP for clofibric acid vs. carbamazepine, but the response of MIP and NIP to 2,4-dichlorophenoxyacetic acid was higher than that for clofibric acid. A smooth surface, revealed by AFM measurements, with roughness of 6-8 nm for imprinted and non-imprinted layers, might be a reason for an excessively low density of specific binding sites for clofibric acid. Furthermore, the decreased polymerization rate in the presence of clofibric acid might not result in well-defined polymer structures, which could be the reason for the lower sensitivity.
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36
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Wang H, Yang H, Zhang L. Temperature-sensitive molecularly imprinted microgels with esterase activity. Sci China Chem 2014. [DOI: 10.1007/s11426-010-4200-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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37
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Organocatalysis: Key Trends in Green Synthetic Chemistry, Challenges, Scope towards Heterogenization, and Importance from Research and Industrial Point of View. ACTA ACUST UNITED AC 2014. [DOI: 10.1155/2014/402860] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This paper purports to review catalysis, particularly the organocatalysis and its origin, key trends, challenges, examples, scope, and importance. The definition of organocatalyst corresponds to a low molecular weight organic molecule which in stoichiometric amounts catalyzes a chemical reaction. In this review, the use of the term heterogenized organocatalyst will be exclusively confined to a catalytic system containing an organic molecule immobilized onto some sort of support material and is responsible for accelerating a chemical reaction. Firstly, a brief description of the field is provided putting it in a green and sustainable perspective of chemistry. Next, research findings on the use of organocatalysts on various inorganic supports including nano(porous)materials, nanoparticles, silica, and zeolite/zeolitic materials are scrutinized in brief. Then future scope, research directions, and academic and industrial applications will be outlined. A succinct account will summarize some of the research and developments in the field. This review tries to bring many outstanding researches together and shows the vitality of the organocatalysis through several aspects.
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38
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Liu R, Sha M, Jiang S, Luo J, Liu X. A facile approach for imprinting protein on the surface of multi-walled carbon nanotubes. Talanta 2014; 120:76-83. [DOI: 10.1016/j.talanta.2013.12.002] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2013] [Revised: 11/29/2013] [Accepted: 12/02/2013] [Indexed: 11/26/2022]
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39
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Li P, Wang T, Lei F, Tang P, Tan X, Liu Z, Shen L. Rosin-based molecularly imprinted polymers as the stationary phase in high-performance liquid chromatography for selective separation of berberine hydrochloride. POLYM INT 2014. [DOI: 10.1002/pi.4694] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Pengfei Li
- College of Chemistry and Chemical Engineering; Guangxi University for Nationalities; Nanning PR China
| | - Ting Wang
- College of Chemistry and Chemical Engineering; Guangxi University for Nationalities; Nanning PR China
| | - Fuhou Lei
- College of Chemistry and Chemical Engineering; Guangxi University for Nationalities; Nanning PR China
- Guangxi Provincial Key Laboratory of Forest Products Chemistry and Engineering; Nanning PR China
| | - Pingping Tang
- College of Chemistry and Chemical Engineering; Guangxi University for Nationalities; Nanning PR China
| | - Xuecai Tan
- College of Chemistry and Chemical Engineering; Guangxi University for Nationalities; Nanning PR China
| | - Zuguang Liu
- College of Chemistry and Chemical Engineering; Guangxi University for Nationalities; Nanning PR China
| | - Liqun Shen
- College of Chemistry and Chemical Engineering; Guangxi University for Nationalities; Nanning PR China
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Oxovanadium(IV)-containing poly(styrene-co-4′-ethenyl-2-hydroxyphenylimidazole) electrospun nanofibers for the catalytic oxidation of thioanisole. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.molcata.2013.07.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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41
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Awokoya KN, Batlokwa BS, Moronkola BA, Chigome S, Ondigo DA, Tshentu Z, Torto N. Development of a Styrene Based Molecularly Imprinted Polymer and Its Molecular Recognition Properties of Vanadyl Tetraphenylporphyrin in Organic Media. INT J POLYM MATER PO 2013. [DOI: 10.1080/00914037.2013.769255] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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42
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Li SJ, Zheng MX, Zhang JM. Selective Adsorption and Molecular Recognition by a Molecularly Imprinted Polymer: Kinetic Study and Analysis. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200800019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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43
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Silylated montmorillonite based molecularly imprinted polymer for the selective binding and controlled release of thiamine hydrochloride. REACT FUNCT POLYM 2013. [DOI: 10.1016/j.reactfunctpolym.2013.05.004] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Ince GO, Armagan E, Erdogan H, Buyukserin F, Uzun L, Demirel G. One-dimensional surface-imprinted polymeric nanotubes for specific biorecognition by initiated chemical vapor deposition (iCVD). ACS APPLIED MATERIALS & INTERFACES 2013; 5:6447-6452. [PMID: 23806214 DOI: 10.1021/am401769r] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Molecular imprinting is a powerful, generic, and cost-effective technique; however, challenges still remain related to the fabrication and development of these systems involving nonhomogeneous binding sites, insufficient template removing, incompatibility with aqueous media, low rebinding capacity, and slow mass transfer. The vapor-phase deposition of polymers is a unique technique because of the conformal nature of coating and offers new possibilities in a number of applications including sensors, microfluidics, coating, and bioaffinity platforms. Herein, we demonstrated a simple but versatile concept to generate one-dimensional surface-imprinted polymeric nanotubes within anodic aluminum oxide (AAO) membranes based on initiated chemical vapor deposition (iCVD) technique for biorecognition of immunoglobulin G (IgG). It is reported that the fabricated surface-imprinted nanotubes showed high binding capacity and significant specific recognition ability toward target molecules compared with the nonimprinted forms. Given its simplicity and universality, the iCVD method can offer new possibilities in the field of molecular imprinting.
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Affiliation(s)
- Gozde Ozaydin Ince
- Faculty of Engineering and Natural Sciences, Sabanci University, 34956 Istanbul, Turkey.
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Fourty years of molecular imprinting in synthetic polymers: origin, features and perspectives. Mikrochim Acta 2013. [DOI: 10.1007/s00604-013-0992-9] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Krumm C, Konieczny S, Dropalla GJ, Milbradt M, Tiller JC. Amphiphilic Polymer Conetworks Based on End Group Cross-Linked Poly(2-oxazoline) Homo- and Triblock Copolymers. Macromolecules 2013. [DOI: 10.1021/ma4004665] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christian Krumm
- Biomaterials and Polymer Science,
Department of Biochemical
and Chemical Engineering, TU Dortmund,
Emil-Figge-Straße 66, 44227 Dortmund, Germany
| | - Stefan Konieczny
- Biomaterials and Polymer Science,
Department of Biochemical
and Chemical Engineering, TU Dortmund,
Emil-Figge-Straße 66, 44227 Dortmund, Germany
| | - Georg J. Dropalla
- Biomaterials and Polymer Science,
Department of Biochemical
and Chemical Engineering, TU Dortmund,
Emil-Figge-Straße 66, 44227 Dortmund, Germany
| | - Marc Milbradt
- Biomaterials and Polymer Science,
Department of Biochemical
and Chemical Engineering, TU Dortmund,
Emil-Figge-Straße 66, 44227 Dortmund, Germany
| | - Joerg C. Tiller
- Biomaterials and Polymer Science,
Department of Biochemical
and Chemical Engineering, TU Dortmund,
Emil-Figge-Straße 66, 44227 Dortmund, Germany
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Chen W, Han DK, Ahn KD, Kim JM. Molecularly imprinted polymers having amidine and imidazole functional groups as an enzyme-mimetic catalyst for ester hydrolysis. Macromol Res 2013. [DOI: 10.1007/bf03218301] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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