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Mahato RR, Juneja S, Maiti S. Benchmarking Cationic Monolayer Protected Nanoparticles and Micelles for Phosphate-Mediated and Nucleotide-Selective Proton Transfer Catalysis. Chem Asian J 2023; 18:e202300657. [PMID: 37639220 DOI: 10.1002/asia.202300657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 08/27/2023] [Accepted: 08/28/2023] [Indexed: 08/29/2023]
Abstract
Both micelles and self-assembled monolayer (SAM)-protected nanoparticles are capable of efficiently hosting water-immiscible substrates to carry out organic reactions in aqueous media. Herein, we have analyzed the different catalytic effect of SAM-protected cationic nanoparticles and cationic surfactants of varying chain length towards base-catalyzed proton transfer mediated ring-opening reaction of 5-nitrobenzisoxazole (NBI) (also known as Kemp Elimination (KE) reaction). We use inorganic phosphate ion or different nucleotide (phosphate-ligated different nucleoside) as base to promote the reaction on micellar or nanoparticle interface. We find almost 2-3 orders of magnitude higher concentration of surfactants of comparable hydrophobicity required to reach the similar activity which attained by low cationic head group concentration bound on nanoparticle. Additionally, at low concentration of nanoparticle-bound surfactant or with high surfactant in micellar form, nucleotide-selectivity has been observed in activating KE reaction unlike free surfactant at low concentration. Finally, we showed enzyme-mediated nucleotide hydrolysis to generate phosphate ion which in situ upregulate the KE activity much more in GNP-based system compared to CTAB. Notably, we show a reasonable superiority of SAM-protected nanoparticles in activating chemical reaction in micromolar concentration of headgroup which certainly boost up application of SAM-based nanoparticles not only for selective recognition but also as eco-friendly catalyst.
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Affiliation(s)
- Rishi Ram Mahato
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Manauli, 140306, India
| | - Sakshi Juneja
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Manauli, 140306, India
| | - Subhabrata Maiti
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Manauli, 140306, India
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2
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Zangiabadi M, Zhao Y. Synergistic Hydrolysis of Cellulose by a Blend of Cellulase-Mimicking Polymeric Nanoparticle Catalysts. J Am Chem Soc 2022; 144:17110-17119. [PMID: 36069714 PMCID: PMC10183977 DOI: 10.1021/jacs.2c06848] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Enzyme-like catalysts by design have been a long sought-after goal of chemists but difficult to realize due to the challenges in the construction of multifunctionalized active sites with accurately positioned catalytic groups for complex substrates. Hydrolysis of cellulose is a key step in biomass utilization and requires multiple enzymes to work in concert to overcome the difficulty associated with hydrolyzing the recalcitrant substrate. We here report methods to construct synthetic versions of these enzymes through covalent molecular imprinting and strategic postmodification of the imprinted sites. The synthetic catalysts cleave a cellulose chain endolytically at multiple positions or exolytically from the nonreducing end by one or three glucose units at a time, all using the dicarboxylic acid motif found in natural cellulases. By mimicking the endocellulase, exocellulase, and β-glucosidase, the synthetic catalysts hydrolyze cellulose in a synergistic manner, with an activity at 90 °C in pH 6.5 buffer more than doubled that of Aspergillus niger cellulase at pH 5 and 37 °C and 44% of that of a commercial cellulase blend (from Novozyme). As robust cross-linked polymeric nanoparticles, the synthetic catalysts showed little changes in activity after preheating at 90 °C for 3 days and could be reused, maintaining 76% of activity after 10 reaction cycles.
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Affiliation(s)
- Milad Zangiabadi
- 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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3
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Imidazole-Based Monomer as Functional Unit for the Specific Detection of Paraxanthine in Aqueous Environments. CHEMOSENSORS 2022. [DOI: 10.3390/chemosensors10080301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
In the context of personalized medicine, the paraxanthine-to-caffeine ratio is an accepted standard for the optimization of the dose-response effect of many pharmaceuticals in individual patients. There is a strong drive towards the development of cheaper and portable devices for the detection of biomarkers, including paraxanthine and caffeine, which requires materials with high binding efficiency and specificity. We designed a recognition unit specific for paraxanthine which can discriminate molecules with small structural differences and can be used to increase the sensitivity of sensors. A number of functional units were screened by nuclear magnetic resonance for their ability to form specific binding interactions with paraxanthine in water and negligible interactions with its structural analogue caffeine. Imidazole was identified as the unit showing the most promising results and its two polymerizable derivatives were evaluated by isothermal titration calorimetry to identify the best monomer. The data suggested that 4-vinylimidazole was the most promising unit forming specific and strong binding interaction with paraxanthine. The calorimetry experiments allowed also the determination of the thermodynamic parameters of all interactions and the association constant values. Optimization of polymerization protocols in water, achieving high monomer conversions and chemical yields, demonstrate the suitability of the selected functional monomer for polymer preparations, targeting the detection of paraxanthine in aqueous environments.
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4
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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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5
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Bose I, Zhao Y. Site-Selective Catalytic Epoxidation of Alkene with Tunable, Atomic Precision by Molecularly Imprinted Artificial Epoxidases. ACS Catal 2022; 12:3444-3451. [PMID: 35515882 PMCID: PMC9066603 DOI: 10.1021/acscatal.2c00253] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Distinction of chemical functionality by their local chemical environment is a skill mastered by enzymes, evident from the selective synthesis, cleavage, and transformation of peptides, nucleic acids, and polysaccharides that abound with the same type of functional groups. In contrast, synthetic catalysts are generally better at differentiating functional groups based on their electronic and steric properties. Here we report artificial epoxidases prepared through molecular imprinting of surface-core doubly cross-linked micelles, followed by efficient functionalization of the imprinted site in the micellar core via photoaffinity labeling. The size and shape of the active sites are tuned by the modularly synthesized templates, with the oxygen-delivering peroxy acid group positioned accurately. These catalysts are used in epoxidation of alkene in water with hydrogen peroxide under mild conditions, without any additional additives. Most importantly, atomic precision is achieved in the catalysis and enables alkenes to be distinguished that differ in the position of the carbon-carbon double bond by a single carbon.
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Affiliation(s)
- Ishani Bose
- 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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6
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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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Zheng S, Pan J, Wang J, Liu S, Zhou T, Wang L, Jia H, Chen Z, Peng Q, Guo T. Ag(I) Pyridine-Amidoxime Complex as the Catalysis Activity Domain for the Rapid Hydrolysis of Organothiophosphate-Based Nerve Agents: Mechanistic Evaluation and Application. ACS APPLIED MATERIALS & INTERFACES 2021; 13:34428-34437. [PMID: 34278774 DOI: 10.1021/acsami.1c09003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Two novel Ag(I) complexes containing synergistic pyridine and amidoxime ligands (Ag-DPAAO and Ag-PAAO) were first designed as complex monomers. Taking advantage of the molecular imprinting technique and solvothermal method, molecular imprinted porous cross-linked polymers (MIPCPs) were developed as a robust platform for the first time to incorporate Ag-PAAO into a polymer material as a recyclable catalyst. Advantageously, the observed pseudo first-order rate constant (kobs) of MIPCP-Ag-PAAO-20% for ethyl-parathion (EP) hydrolysis is about 1.2 × 104-fold higher than that of self-hydrolysis (30 °C, pH = 9). Furthermore, the reaction mechanism of the MIPCP-containing Ag-PAAO-catalyzed organothiophosphate was analyzed in detail using density functional theory and experimental spectra, indicating that the amidoxime can display dual roles for both the key coordination with the silver ion and nucleophilic attack to weaken the P-OAr bond in the catalytic active site.
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Affiliation(s)
- Sujuan Zheng
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry and Frontier Science Center for the Creation of New Organic Substances, Nankai University, Tianjin 300071, China
| | - Jianping Pan
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, College of Chemistry and Frontier Science Center for the Creation of New Organic Substances, Nankai University, Tianjin 300071, China
| | - Junhao Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry and Frontier Science Center for the Creation of New Organic Substances, Nankai University, Tianjin 300071, China
| | - Shuai Liu
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, College of Chemistry and Frontier Science Center for the Creation of New Organic Substances, Nankai University, Tianjin 300071, China
| | - Tongtong Zhou
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, College of Chemistry and Frontier Science Center for the Creation of New Organic Substances, Nankai University, Tianjin 300071, China
| | - Lan Wang
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, College of Chemistry and Frontier Science Center for the Creation of New Organic Substances, Nankai University, Tianjin 300071, China
| | - Huiting Jia
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, College of Chemistry and Frontier Science Center for the Creation of New Organic Substances, Nankai University, Tianjin 300071, China
| | - Zhaoming Chen
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, College of Chemistry and Frontier Science Center for the Creation of New Organic Substances, Nankai University, Tianjin 300071, China
| | - Qian Peng
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry and Frontier Science Center for the Creation of New Organic Substances, Nankai University, Tianjin 300071, China
| | - Tianying Guo
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, College of Chemistry and Frontier Science Center for the Creation of New Organic Substances, Nankai University, Tianjin 300071, China
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8
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Bose I, Zhao Y. Tandem Aldol Reaction from Acetal Mixtures by an Artificial Enzyme with Site-Isolated Acid and Base Functionalities. ACS APPLIED POLYMER MATERIALS 2021; 3:2776-2784. [PMID: 34447941 PMCID: PMC8384266 DOI: 10.1021/acsapm.1c00299] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Site-isolation of catalysts can enable incompatible catalysts such as acid and base to be used in one pot for enhanced efficiency and other benefits. Although many synthetic platforms have been reported for this purpose, they generally do not possess the exquisite selectivity of site-isolated enzymes in nature. Here we report water-soluble protein-sized nanoparticles with site-isolated acids in the core and amines on the surface. The catalysts were made through molecular imprinting of cross-linked micelles, followed by facile one-step photoaffinity labeling of the imprinted binding site. With a tunable, substrate-specific active site, the bifunctional artificial enzyme catalyzed highly selective tandem cross aldol reaction between acetone and mixtures of isomeric aryl acetals. It could also transform a less reactive substrate over a more reactive one.
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9
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Li X, Zangiabadi M, Zhao Y. Molecularly Imprinted Synthetic Glucosidase for the Hydrolysis of Cellulose in Aqueous and Nonaqueous Solutions. J Am Chem Soc 2021; 143:5172-5181. [DOI: 10.1021/jacs.1c01352] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Xiaowei Li
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, United States
| | - Milad Zangiabadi
- 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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10
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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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11
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Li X, Zhao Y. Synthetic Glycosidase Distinguishing Glycan and Glycosidic Linkage in Its Catalytic Hydrolysis. ACS Catal 2020; 10:13800-13808. [PMID: 34123483 DOI: 10.1021/acscatal.0c04038] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Selective hydrolysis of carbohydrates is vital to the processing of these molecules in biology but has rarely been achieved with synthetic catalysts. The challenge is especially difficult because the catalyst needs to distinguish the inversion of a single hydroxyl and the α or β glycosidic bonds that join monosaccharide building blocks. Here we report synthetic glycosidase prepared through molecular imprinting within a cross-linked micelle. The nanoparticle catalyst resembles natural enzymes in dimension, water-solubility, and a hydrophilic/hydrophobic surface-core topology. Its boronic acid-functionalized active site binds its targeted glycoside substrate and an acid cofactor simultaneously, with the acidic group in close proximity to the exocyclic glycosidic oxygen. The hydrophobically anchored acid cofactor is tunable in acidity and causes selective cleavage of the targeted glycoside in mildly acidic water. Selectivity for both the glycan and the α/β glycosidic bond can be rationally designed through the molecular imprinting process.
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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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12
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Bose I, Zhao Y. pH-Controlled Nanoparticle Catalysts for Highly Selective Tandem Henry Reaction from Mixtures. ACS Catal 2020; 10:13973-13977. [PMID: 34094653 DOI: 10.1021/acscatal.0c03468] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Nature has a remarkable ability to perform selective transformation of complex biological mixtures into desired products using enzymatic catalysts. We report the preparation of nanoparticle catalysts through molecular imprinting within cross-linked micelles. These catalysts were highly selective for their targeted substrates and could selectively hydrolyze less reactive acetals over more reactive ones even under basic conditions. Their catalytic activity and selectivity were tunable through rational postmodification of the active site. These properties enabled the nanoparticle catalysts to produce the desired β-nitro alcohol from a four-component acetal mixture in a tandem deprotection/Henry reaction that required incompatible acidic and basic catalysts in the two steps.
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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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13
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Pan J, Liu S, Jia H, Yang J, Qin M, Zhou T, Chen Z, Jia X, Guo T. Rapid hydrolysis of nerve agent simulants by molecularly imprinted porous crosslinked polymer incorporating mononuclear zinc(II)-picolinamine-amidoxime module. J Catal 2019. [DOI: 10.1016/j.jcat.2019.10.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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14
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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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15
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Wang R, Pan J, Qin M, Guo T. Molecularly imprinted nanocapsule mimicking phosphotriesterase for the catalytic hydrolysis of organophosphorus pesticides. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2018.10.045] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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16
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Zhang S, Zhao Y. Tuning surface-cross-linking of molecularly imprinted cross-linked micelles for molecular recognition in water. J Mol Recognit 2018; 32:e2769. [PMID: 30419606 DOI: 10.1002/jmr.2769] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 10/09/2018] [Accepted: 10/15/2018] [Indexed: 12/12/2022]
Abstract
Molecular recognition in water is an important challenge in supramolecular chemistry. Surface-core double cross-linking of template-containing surfactant micelles by the click reaction and free radical polymerization yields molecularly imprinted nanoparticles (MINPs) with guest-complementary binding sites. An important property of MINP-based receptors is the surface-cross-linking between the propargyl groups of the surfactants and a diazide cross-linker. Decreasing the number of carbons in between the two azides enhanced the binding affinity of the MINPs, possibly by keeping the imprinted binding site more open prior to the guest binding. The depth of the binding pocket can be controlled by the distribution of the hydrophilic/hydrophobic groups of the template and was found to influence the binding in addition to electrostatic interactions between oppositely charged MINPs and guests. Cross-linkers with an alkoxyamine group enabled two-stage double surface-cross-linking that strengthened the binding constants by an order of magnitude, possibly by expanding the binding pocket of the MINP into the polar region. The binding selectivity among very similar isomeric structures also improved.
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Affiliation(s)
- Shize Zhang
- Department of Chemistry, Iowa State University, Ames, IA, USA
| | - Yan Zhao
- Department of Chemistry, Iowa State University, Ames, IA, USA
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17
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Hu L, Zhao Y. Molecularly imprinted artificial esterases with highly specific active sites and precisely installed catalytic groups. Org Biomol Chem 2018; 16:5580-5584. [PMID: 30051894 DOI: 10.1039/c8ob01584h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A difficult challenge in synthetic enzymes is the creation of substrate-selective active sites with accurately positioned catalytic groups. Covalent molecular imprinting in cross-linked micelles afforded such active sites in protein-sized, water-soluble nanoparticle catalysts. Our method allowed a systematic tuning of the distance of the catalytic group to the bound substrate. The catalysts displayed enzyme-like kinetics and easily distinguished substrates with subtle structural differences.
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Affiliation(s)
- Lan Hu
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, USA.
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18
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Arifuzzaman MD, Zhao Y. Artificial Zinc Enzymes with Fine-Tuned Active Sites for Highly Selective Hydrolysis of Activated Esters. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02292] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- MD 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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Arifuzzaman MD, Zhao W, Zhao Y. Surface Ligands in the Imprinting and Binding of Molecularly Imprinted Cross-Linked Micelles. Supramol Chem 2018; 30:929-939. [PMID: 31223222 PMCID: PMC6585997 DOI: 10.1080/10610278.2018.1489540] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 06/08/2018] [Indexed: 10/28/2022]
Abstract
Molecular recognition in water is challenging but water-soluble molecularly imprinted nanoparticle (MINP) receptors were produced readily by double cross-linking of surfactant micelles in the presence of suitable template molecules. When the micellar surface was decorated with different polyhydroxylated ligands, significant interactions could be introduced between the surface ligands and the template. Flexible surface ligands worked better than rigid ones to interact with the polar moiety of the template, especially for those template molecules whose water-exposed surface is not properly solvated by water. The importance of these hydrophilic interactions was examined in the context of different substrates, density of the surface ligands, and surface-cross-linking density of the MINP. Together with the hydrophobic interactions in the core, the surface hydrophilic interactions can be used to enhance the binding of guest molecules in water.
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Affiliation(s)
- M D Arifuzzaman
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, USA, Tel: +1-515-294-5845
| | - Wei Zhao
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, USA, Tel: +1-515-294-5845
| | - Yan Zhao
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, USA, Tel: +1-515-294-5845
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Duan L, Zhao Y. Selective Binding of Folic Acid and Derivatives by Imprinted Nanoparticle Receptors in Water. Bioconjug Chem 2018. [PMID: 29513991 DOI: 10.1021/acs.bioconjchem.8b00121] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Folate receptors are overexpressed on cancer cells and frequently used for targeted delivery. Creation of synthetic receptors to bind folic acid and its analogues in water, however, is challenging because of its complex hydrogen-bonding patterns and competition for hydrogen bonds from the solvent. Micellar imprinting within cross-linkable surfactants circumvented these problems because the nonpolar micellar environment strengthened the hydrogen bonds between the amide group in the surfactant and the template molecule. Incorporation of polymerizable thiouronium functional monomers further enhanced the binding through hydrogen-bond-reinforced ion pairs with the glutamate moiety of the template. The resulting imprinted micelles were able to bind folate and their analogues with submicromolar affinity and distinguish small changes in the hydrogen-bonding patterns as well as the number/position of carboxylic acids. The binding constant obtained was 2-3 orders of magnitude higher than those reported for small-molecule synthetic receptors. Our binding study also revealed interesting details in the binding. For example, the relative contributions of different segments of the molecule to the binding followed the order of carboxylates > pyrimidine ring > pyrazine ring.
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Affiliation(s)
- Likun Duan
- 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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21
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Hu L, Zhao Y. Cross‐Linked Micelles with Enzyme‐Like Active Sites for Biomimetic Hydrolysis of Activated Esters. Helv Chim Acta 2017. [DOI: 10.1002/hlca.201700147] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Lan Hu
- 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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22
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Jorge AR, Chernobryva M, Rigby SEJ, Watkinson M, Resmini M. Incorporation of Cobalt-Cyclen Complexes into Templated Nanogels Results in Enhanced Activity. Chemistry 2015; 22:3764-74. [PMID: 26661923 PMCID: PMC4797703 DOI: 10.1002/chem.201503946] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Indexed: 11/05/2022]
Abstract
Recent advances in nanomaterials have identified nanogels as an excellent matrix for novel biomimetic catalysts using the molecular imprinting approach. Polymerisable Co‐cyclen complexes with phosphonate and carbonate templates have been prepared, fully characterised and used to obtain nanogels that show high activity and turnover with low catalytic load, compared to the free complex, in the hydrolysis of 4‐nitrophenyl phosphate, a nerve agent simulant. This work demonstrates that the chemical structure of the template has an impact on the coordination geometry and oxidation state of the metal centre in the polymerisable complex resulting in very significant changes in the catalytic properties of the polymeric matrix. Both pseudo‐octahedral cobalt(III) and trigonal‐bipyramidal cobalt(II) structures have been used for the synthesis of imprinted nanogels, and the catalytic data demonstrate that: i) the imprinted nanogels can be used in 15 % load and show turnover; ii) the structural differences in the polymeric matrices resulting from the imprinting approach with different templates are responsible for the molecular recognition capabilities and the catalytic activity. Nanogel P1, imprinted with the carbonate template, shows >50 % higher catalytic activity than P2 imprinted with the phosphonate.
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Affiliation(s)
- Ana Rita Jorge
- Department of Chemistry and Biochemistry, School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS, UK
| | - Mariya Chernobryva
- Department of Chemistry and Biochemistry, School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS, UK
| | - Stephen E J Rigby
- Faculty of Life Sciences, Manchester Institute of Biotechnology, 131 Princess Street, Manchester, M1 7DN, UK
| | - Michael Watkinson
- Department of Chemistry and Biochemistry, School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS, UK.
| | - Marina Resmini
- Department of Chemistry and Biochemistry, School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS, UK.
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Whitcombe MJ, Kirsch N, Nicholls IA. Molecular imprinting science and technology: a survey of the literature for the years 2004-2011. J Mol Recognit 2014; 27:297-401. [PMID: 24700625 DOI: 10.1002/jmr.2347] [Citation(s) in RCA: 275] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Revised: 10/28/2013] [Accepted: 12/01/2013] [Indexed: 12/11/2022]
Abstract
Herein, we present a survey of the literature covering the development of molecular imprinting science and technology over the years 2004-2011. In total, 3779 references to the original papers, reviews, edited volumes and monographs from this period are included, along with recently identified uncited materials from prior to 2004, which were omitted in the first instalment of this series covering the years 1930-2003. In the presentation of the assembled references, a section presenting reviews and monographs covering the area is followed by sections describing fundamental aspects of molecular imprinting including the development of novel polymer formats. Thereafter, literature describing efforts to apply these polymeric materials to a range of application areas is presented. Current trends and areas of rapid development are discussed.
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Guo Y, Wang R, Chi W, Liu S, Shi H, Guo T. One-step synthesis of reactant-product-dual-template imprinted capsules as phosphotriesterase mimetic enzymes for pesticide elimination. RSC Adv 2014. [DOI: 10.1039/c3ra45745a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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25
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Yarman A, Scheller FW. Coupling biocatalysis with molecular imprinting in a biomimetic sensor. Angew Chem Int Ed Engl 2013; 52:11521-5. [PMID: 24038983 DOI: 10.1002/anie.201305368] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Indexed: 11/11/2022]
Abstract
Make it simple: A molecularly imprinted electropolymer was combined with an enzyme in a catalytic biomimetic sensor that enabled interference-free detection of the drug aminopyrine (AP) at submicromolar concentrations in the presence of ascorbic acid and uric acid within 15 s. The sensor functioned by the peroxide-dependent conversion of AP in a layer above a product-imprinted electropolymer on an indicator electrode.
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Affiliation(s)
- Aysu Yarman
- Fraunhofer Institute for Biomedical Engineering, Am Mühlenberg 13, 14476 Potsdam (Germany); Institute of Biochemistry and Biology, University of Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam (Germany)
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26
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Yarman A, Scheller FW. Coupling Biocatalysis with Molecular Imprinting in a Biomimetic Sensor. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201305368] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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27
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Liu Y, Wang S, Zhang C, Su X, Huang S, Zhao M. Enhancing the Selectivity of Enzyme Detection by Using Tailor-Made Nanoparticles. Anal Chem 2013; 85:4853-7. [DOI: 10.1021/ac4007914] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Yibin Liu
- Beijing National
Laboratory for Molecular Sciences,
MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering,
College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Shanshan Wang
- Beijing National
Laboratory for Molecular Sciences,
MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering,
College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Chen Zhang
- Beijing National
Laboratory for Molecular Sciences,
MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering,
College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Xin Su
- Beijing National
Laboratory for Molecular Sciences,
MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering,
College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Shan Huang
- Beijing National
Laboratory for Molecular Sciences,
MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering,
College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Meiping Zhao
- Beijing National
Laboratory for Molecular Sciences,
MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering,
College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
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28
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Servant A, Rogers S, Zarbakhsh A, Resmini M. Polymeric organic nanogels: structural studies and correlation between morphology and catalytic efficiency. NEW J CHEM 2013. [DOI: 10.1039/c3nj00462g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Bonomi P, Servant A, Resmini M. Modulation of imprinting efficiency in nanogels with catalytic activity in the Kemp elimination. J Mol Recognit 2012; 25:352-60. [DOI: 10.1002/jmr.2180] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Paolo Bonomi
- School of Biological and Chemical Sciences; Queen Mary University of London; Mile end road; London; E1 4NS; UK
| | - Ania Servant
- School of Biological and Chemical Sciences; Queen Mary University of London; Mile end road; London; E1 4NS; UK
| | - Marina Resmini
- School of Biological and Chemical Sciences; Queen Mary University of London; Mile end road; London; E1 4NS; UK
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30
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Resmini M. Molecularly imprinted polymers as biomimetic catalysts. Anal Bioanal Chem 2012; 402:3021-6. [DOI: 10.1007/s00216-011-5671-2] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2011] [Revised: 12/13/2011] [Accepted: 12/16/2011] [Indexed: 11/30/2022]
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31
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Talancé VLD, Massinon O, Baati R, Wagner A, Vincent SP. First steps towards conformationally selective artificial lectins: the chair-boat discrimination by molecularly imprinted polymers. Chem Commun (Camb) 2012; 48:10684-6. [DOI: 10.1039/c2cc35386e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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