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Wang X, He GH, Wang ZY, Xu HY, Mou JH, Qin ZH, Lin CSK, Yang WD, Zhang Y, Li HY. Purple acid phosphatase promoted hydrolysis of organophosphate pesticides in microalgae. ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY 2024; 18:100318. [PMID: 37860829 PMCID: PMC10582367 DOI: 10.1016/j.ese.2023.100318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 08/24/2023] [Accepted: 09/13/2023] [Indexed: 10/21/2023]
Abstract
When organophosphate pesticides (OPs) are not used and handled in accordance with the current rules and standards, it results in serious threats to the aquatic environment and human health. Phaeodactylum tricornutum is a prospective microalgae-based system for pollutant removal and carbon sequestration. Genetically engineered P. tricornutum, designated as the OE line (endogenously expressing purple acid phosphatase 1 [PAP1]), can utilize organic phosphorus for cellular metabolism. However, the competencies and mechanisms of the microalgae-based system (namely the OE line of P. tricornutum) for metabolizing OPs remain to be addressed. In this study, the OE line exhibited the effective biodegradation competencies of 72.12% and 68.2% for 30 mg L-1 of dichlorvos and 50 mg L-1 of glyphosate, accompanied by synergistic accumulations of biomass (0.91 and 0.95 g L-1) and lipids (32.71% and 32.08%), respectively. Furthermore, the biodiesel properties of the lipids from the OE line manifested a high potential as an alternative feedstock for microalgae-based biofuel production. A plausible mechanism of OPs biodegraded by overexpressed PAP1 is that sufficient inorganic P for adenosine triphosphate and concurrent carbon flux for the reduced form of nicotinamide adenine dinucleotide phosphate biosynthesis, which improved the OP tolerance and biodegradation competencies by regulating the antioxidant system, delaying programmed cell death and accumulating lipids via the upregulation of related genes. To sum up, this study demonstrates a potential strategy using a genetically engineered strain of P. tricornutum to remove high concentrations of OPs with the simultaneous production of biomass and biofuels, which might provide novel insights for microalgae-based pollutant biodegradation.
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Affiliation(s)
- Xiang Wang
- Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
| | - Guo-Hui He
- Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Zhen-Yao Wang
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Hui-Ying Xu
- Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Jin-Hua Mou
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 510000, China
| | - Zi-Hao Qin
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 510000, China
| | - Carol Sze Ki Lin
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
| | - Wei-Dong Yang
- Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Yalei Zhang
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Hong-Ye Li
- Key Laboratory of Eutrophication and Red Tide Prevention of Guangdong Higher Education Institutes, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
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Lionetti D, Suseno S, Shiau AA, de Ruiter G, Agapie T. Redox Processes Involving Oxygen: The Surprising Influence of Redox-Inactive Lewis Acids. JACS AU 2024; 4:344-368. [PMID: 38425928 PMCID: PMC10900226 DOI: 10.1021/jacsau.3c00675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/12/2023] [Accepted: 12/13/2023] [Indexed: 03/02/2024]
Abstract
Metalloenzymes with heteromultimetallic active sites perform chemical reactions that control several biogeochemical cycles. Transformations catalyzed by such enzymes include dioxygen generation and reduction, dinitrogen reduction, and carbon dioxide reduction-instrumental transformations for progress in the context of artificial photosynthesis and sustainable fertilizer production. While the roles of the respective metals are of interest in all these enzymatic transformations, they share a common factor in the transfer of one or multiple redox equivalents. In light of this feature, it is surprising to find that incorporation of redox-inactive metals into the active site of such an enzyme is critical to its function. To illustrate, the presence of a redox-inactive Ca2+ center is crucial in the Oxygen Evolving Complex, and yet particularly intriguing given that the transformation catalyzed by this cluster is a redox process involving four electrons. Therefore, the effects of redox inactive metals on redox processes-electron transfer, oxygen- and hydrogen-atom transfer, and O-O bond cleavage and formation reactions-mediated by transition metals have been studied extensively. Significant effects of redox inactive metals have been observed on these redox transformations; linear free energy correlations between Lewis acidity and the redox properties of synthetic model complexes are observed for several reactions. In this Perspective, these effects and their relevance to multielectron processes will be discussed.
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Affiliation(s)
| | - Sandy Suseno
- Division of Chemistry and
Chemical Engineering, California Institute
of Technology, 1200 East California Boulevard, MC 127-72, Pasadena, California 91125, United States
| | - Angela A. Shiau
- Division of Chemistry and
Chemical Engineering, California Institute
of Technology, 1200 East California Boulevard, MC 127-72, Pasadena, California 91125, United States
| | - Graham de Ruiter
- Division of Chemistry and
Chemical Engineering, California Institute
of Technology, 1200 East California Boulevard, MC 127-72, Pasadena, California 91125, United States
| | - Theodor Agapie
- Division of Chemistry and
Chemical Engineering, California Institute
of Technology, 1200 East California Boulevard, MC 127-72, Pasadena, California 91125, United States
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Jamali Langeroudi A, Sabet MS, Jalali-Javaran M, Zamani K, Lohrasebi T, Malboobi MA. Functional assessment of AtPAP17; encoding a purple acid phosphatase involved in phosphate metabolism in Arabidopsis thaliana. Biotechnol Lett 2023; 45:719-739. [PMID: 37074554 DOI: 10.1007/s10529-023-03375-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 03/05/2023] [Accepted: 04/03/2023] [Indexed: 04/20/2023]
Abstract
PURPOSE Purple acid phosphatases (PAPs) includ the largest classes of non-specific plant acid phosphatases. Most characterized PAPs were found to play physiological functions in phosphorus metabolism. In this study, we investigated the function of AtPAP17 gene encoding an important purple acid phosphatase in Arabidopsis thaliana. METHODS The full-length cDNA sequence of AtPAP17 gene under the control of CaMV-35S promoter was transferred to the A. thaliana WT plant. The generated homozygote AtPAP17-overexpressed plants were compared by the types of analyses with corresponding homozygote atpap17-mutant plant and WT in both + P (1.2 mM) and - P (0 mM) conditions. RESULTS In the + P condition, the highest and the lowest amount of Pi was observed in AtPAP17-overexpressed plants and atpap17-mutant plants by 111% increase and 38% decrease compared with the WT plants, respectively. Furthermore, under the same condition, APase activity of AtPAP17-overexpressed plants increased by 24% compared to the WT. Inversely, atpap17-mutant plant represented a 71% fall compared to WT plants. The comparison of fresh weight and dry weight in the studied plants showed that the highest and the lowest amount of absorbed water belonged to OE plants (with 38 and 12 mg plant-1) and Mu plants (with 22 and 7 mg plant-1) in + P and - P conditions, respectively. CONCLUSION The lack of AtPAP17 gene in the A. thaliana genome led to a remarkable reduction in the development of root biomass. Thus, AtPAP17 could have an important role in the root but not shoot developmental and structural programming. Consequently, this function enables them to absorb more water and eventually associated with more phosphate absorption.
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Affiliation(s)
- Arash Jamali Langeroudi
- Department of Agricultural Biotechnology, Faculty of Agriculture, Tarbiat Modares University, P.O. Box 14115-336, Tehran, Iran
| | - Mohammad Sadegh Sabet
- Department of Plant Genetics and Breeding, Faculty of Agriculture, Tarbiat Modares University, P.O. Box 14115-336, Tehran, Iran.
| | - Mokhtar Jalali-Javaran
- Department of Agricultural Biotechnology, Faculty of Agriculture, Tarbiat Modares University, P.O. Box 14115-336, Tehran, Iran
| | - Katayoun Zamani
- Department of Genetic Engineering and Biosafety, Agricultural Biotechnology Research Institute of Iran, Agricultural Research, Education, and Extension Organization, Karaj, Tehran, Iran
| | - Tahmineh Lohrasebi
- Department of Plant Biotechnology, National Institute of Genetic Engineering and Biotechnology, P.O. Box 14965-161, Tehran, Iran
| | - Mohammad Ali Malboobi
- Department of Plant Biotechnology, National Institute of Genetic Engineering and Biotechnology, P.O. Box 14965-161, Tehran, Iran
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Bouroumane N, El Boutaybi M, El Kodadi M, Touzani R, Oussaid A, Hammouti B, Abboud M. Synthesis of new heterocyclic ligands and study of the catecholase activity of catalysts based on copper(II). REACTION KINETICS MECHANISMS AND CATALYSIS 2023. [DOI: 10.1007/s11144-023-02370-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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Jayasinghe-Arachchige VM, Serafim LF, Hu Q, Ozen C, Moorkkannur SN, Schenk G, Prabhakar R. Elucidating the Roles of Distinct Chemical Factors in the Hydrolytic Activities of Hetero- and Homonuclear Synthetic Analogues of Binuclear Metalloenzymes. ACS Catal 2023. [DOI: 10.1021/acscatal.2c05758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Affiliation(s)
| | - Leonardo F. Serafim
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146, United States
| | - Qiaoyu Hu
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146, United States
| | - Cihan Ozen
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146, United States
| | - Sreerag N. Moorkkannur
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146, United States
| | - Gerhard Schenk
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, Brisbane, Queensland 4072, Australia
| | - Rajeev Prabhakar
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146, United States
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Grafted dinuclear zinc complexes for selective recognition of phosphatidylserine: Application to the capture of extracellular membrane microvesicles. J Inorg Biochem 2023; 239:112065. [PMID: 36403435 DOI: 10.1016/j.jinorgbio.2022.112065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/25/2022] [Accepted: 11/01/2022] [Indexed: 11/11/2022]
Abstract
Microvesicles (MVs) are key markers in human body fluids that reflect cellular activation related to diseases as thrombosis. These MVs display phosphatidylserine at the outer leaflet of their plasma membrane as specific recognition moieties. The work reported in this manuscript focuses on the development of an original method where MVs are captured by bimetallic zinc complexes. A set of ligands have been synthetized based on a phenol spacer bearing in para position an amine group appended to a short or a longer alkyl chain (for grafting on surface) and bis(dipicolylamine) arms in ortho position (for zinc coordination). The corresponding dibridged zinc phenoxido and hydroxido complexes have been prepared in acetronitrile in presence of triethylamine and characterized by several spectroscopic techniques. The pH-driven interconversion studies for both complexes in H2O:DMSO (70:30) evidence that at physiologic pH the main species are mono-bridged by the phenoxido spacer. An X-Ray structure obtained from complex 2 (based on the ligand with the amine group on the short chain) in aqueous medium confirms the presence of a mono-bridged complex. Then, the complexes have been used for interaction studies with short-chain phospholipids. Both have established the selective recognition of the anionic phosphatidylserine model versus zwitterionic phospholipids (in solution by 31P NMR and after immobilization on solid support by surface plasmon resonance (SPR)). Moreover, both complexes have also demonstrated their ability to capture MVs isolated from human plasma. These complexes are thus promising candidates for MVs probing by a new approach based on coordination chemistry.
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Costa LMO, Reis IS, Fernandes C, Marques MM, Resende JALC, Krenske EH, Schenk G, Gahan LR, Horn A. Synthesis, characterization and computational investigation of the phosphatase activity of a dinuclear Zinc(II) complex containing a new heptadentate asymmetric ligand. J Inorg Biochem 2023; 239:112064. [PMID: 36410306 DOI: 10.1016/j.jinorgbio.2022.112064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 10/24/2022] [Accepted: 11/01/2022] [Indexed: 11/06/2022]
Abstract
We report the synthesis of a new asymmetric heptadentate ligand based on the 1,3-diaminopropan-2-ol backbone. The ligand 3-[[3-(bis-pyridin-2-ylmethyl-amino)-2-hydroxy-propyl]-(2-carbamoyl-ethyl)-amino]-propionamide (HL1) contains two amide and two pyridine groups attached to the 1,3-diaminopropan-2-ol core. Reaction between HL1 and Zn(ClO4)2.6H2O resulted in the formation of the dinuclear [Zn2(L1)(μ-OAc)](ClO4)2 complex, characterized by single crystal X-ray diffraction, 1H, 13C and 15N NMR, ESI-(+)-MS, CHN elemental analysis as well as infrared spectroscopy. The phosphatase activity of the complex was studied in the pH range 6-11 employing pyridinium bis(2,4-dinitrophenyl)phosphate (py(BDNPP)) as substrate. The complex exhibited activity dependent on the pH, presenting an asymmetric bell shape profile with the highest activity at pH 9; at high pH ligand exchange is rate-limiting. The hydrolysis of BDNPP- at pH 9 displayed behavior characteristic of Michaelis-Menten kinetics, with kcat = 5.06 × 10-3 min-1 and Km = 5.7 ± 1.0 mM. DFT calculations map out plausible reaction pathways and identify a terminal, Zn(II)-bound hydroxide as likely nucleophile.
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Affiliation(s)
- Luel M O Costa
- Laboratório de Ciências Químicas, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ 28013-602, Brazil
| | - Iago S Reis
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, SC 88040-900, Brazil
| | - Christiane Fernandes
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, SC 88040-900, Brazil
| | - Marcelo M Marques
- Colégio Universitário Geraldo Reis, Universidade Federal Fluminense, Niterói, RJ 24210-200, Brazil
| | - Jackson A L C Resende
- Instituto de Ciências Exatas e da Terra, Universidade Federal de Mato Grosso, Pontal do Araguaia, MT, Brazil
| | - Elizabeth H Krenske
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Gerhard Schenk
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland 4072, Australia; Sustainable Minerals Institute, The University of Queensland, Brisbane, Queensland, Australia, 4072; Australian Institute of Bioengineering and Nanotechnology, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Lawrence R Gahan
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Adolfo Horn
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, SC 88040-900, Brazil.
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Luiz E, Farias G, Bortoluzzi AJ, Neves A, de Melo Mattos LM, Pereira MD, Xavier FR, Peralta RA. Hydrolytic activity of new bioinspired Mn IIIMn II and Fe IIIMn II complexes as mimetics of PAPs: Biological and environmental interest. J Inorg Biochem 2022; 236:111965. [PMID: 35988388 DOI: 10.1016/j.jinorgbio.2022.111965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 08/01/2022] [Accepted: 08/10/2022] [Indexed: 12/15/2022]
Abstract
Coordination compounds that mimic Purple Acid Phosphatases (PAPs) have drawn attention in the bioinorganic field due to their capacity to cleave phosphodiester bonds. However, their catalytic activity upon phosphate triesters is still unexplored. Thus, we report the synthesis and characterization of two binuclear complexes, [MnIIMnIII(L1)(OAc)2]BF4 (1) and [MnIIFeIII(L1)(OAc)2]BF4 (2) (H2L1 = 2-[N,N-bis-(2- pyridilmethyl)aminomethyl]-4-methyl-6-[N-(2-hydroxy-3-formyl-5-methylbenzyl)-N-(2-pyridylmethyl)aminomethyl]phenol), their hydrolytic activity and antioxidant potential. The complexes were fully characterized, including the X-Ray diffraction (XRD) of 1. Density functional theory (DFT) calculations were performed to better understand their electronic and structural properties and phosphate conjugates. The catalytic activity was analyzed for two model substrates, a diester (BDNPP) and a triester phosphate (DEDNPP). The results suggest enhancement of the hydrolysis reaction by 170 to 1500 times, depending on the substrate and complex. It was possible to accompany the catalytic reaction of DEDNPP hydrolysis by phosphorus nuclear magnetic resonance (31P NMR), showing that both 1 and 2 are efficient catalysts. Moreover, we also addressed that 1 and 2 present a relevant antioxidant potential, protecting the yeast Saccharomyces cerevisiae, used as eukaryotic model of study, against the exposure of cells to acute oxidative stress.
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Affiliation(s)
- Edinara Luiz
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040-900, Brazil
| | - Giliandro Farias
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040-900, Brazil
| | - Adailton J Bortoluzzi
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040-900, Brazil
| | - Ademir Neves
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040-900, Brazil
| | - Larissa Maura de Melo Mattos
- Instituto de Química, Departamento de Bioquímica, Universidade Federal do Rio de Janeiro, 21941-909, Brazil; Rede Micologia RJ - FAPERJ
| | - Marcos Dias Pereira
- Instituto de Química, Departamento de Bioquímica, Universidade Federal do Rio de Janeiro, 21941-909, Brazil; Rede Micologia RJ - FAPERJ
| | - Fernando R Xavier
- Departamento de Química, Universidade do Estado de Santa Catarina, Joinville, Santa Catarina 89219-710, Brazil.
| | - Rosely A Peralta
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040-900, Brazil.
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Neves A, Tomkowicz Z, Couto RA, Bombazar CC, Amorim SM, Bortoluzzi AJ, Peralta RA. Trinuclear CuII complex containing a new pentadentate ligand: Structure, magnetism, physicochemical properties and catecholase activity. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.120804] [Citation(s) in RCA: 1] [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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10
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Synthesis of diaryl phosphates using orthophosphoric acid as a phosphorus source. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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11
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Foley W, Arman H, Musie GT. Homodinuclear copper(II) and zinc(II) complexes of a carboxylate-rich ligand as synthetic mimics of phosphoester hydrolase in aqueous solutions. J Inorg Biochem 2021; 225:111589. [PMID: 34530333 DOI: 10.1016/j.jinorgbio.2021.111589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 07/14/2021] [Accepted: 08/18/2021] [Indexed: 11/28/2022]
Abstract
The synthesis, characterization and catalytic activities of two homodinuclear Cu(II) and Zn(II) complexes of a carboxylate-rich ligand, N,N'-Bis[2-carboxybenzomethyl]-N,N' -Bis[carboxymethyl]-1,3-diaminopropan-2-ol (H5ccdp) ligand towards the hydrolysis of (p-nitrophenyl phosphate) (PNPP) and bis(p-nitrophenyl) phosphate (BNPP) substrates in aqueous systems are described. Kinetic investigations were carried out using UV-Vis spectrophotometric techniques at 25 °C and 37 °C and different pH (7-10) conditions. The kinetic studies revealed that the turnover rate (kcat) values among the PNPP hydrolysis systems, the highest and the lowest kcat values were displayed by [Cu2(ccdp)(μ-OAc)]2- at 2.34 × 10-6 s-1 (pH 8 and 37 °C) and 2.13 × 10-8 s-1 (pH 8 and 25 °C), respectively. However, similar comparisons among the BNPP hydrolysis revealed that highest and the lowest kcat values were displayed by [Zn2(ccdp)(μ-OAc)]2- at 4.64 × 10-8 s-1 (pH 9 and 37 °C) and 2.38 × 10-9 (pH 9 and 25 °C). Significantly enough, the catalyst-substrate adduct species containing a metal bound PNPP and BNPP have been detected by ESI-MS techniques. Additionally, a PNPP-bound copper complex has been isolated and crystalized using single crystal X-ray diffraction technique. Based on the structural and activity information obtained in this study, reaction mechanisms for the hydrolysis of PNPP have been proposed.
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Affiliation(s)
- William Foley
- Department of Chemistry, University of Texas at San Antonio, San Antonio, TX 78249, United States
| | - Hadi Arman
- Department of Chemistry, University of Texas at San Antonio, San Antonio, TX 78249, United States
| | - Ghezai T Musie
- Department of Chemistry, University of Texas at San Antonio, San Antonio, TX 78249, United States.
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Chaves CC, Farias G, Formagio MD, Neves A, Peralta RM, Mikcha JM, de Souza B, Peralta RA. Three new dinuclear nickel(II) complexes with amine pendant-armed ligands: Characterization, DFT study, antibacterial and hydrolase-like activity. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119559] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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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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Zhou X, Zhang XP, Li W, Jiang J, Xu H, Ke Z, Phillips DL, Zhao C. Unraveling mechanisms of the uncoordinated nucleophiles: theoretical elucidations of the cleavage of bis( p-nitrophenyl) phosphate mediated by zinc-complexes with apical nucleophiles. RSC Adv 2019; 9:37696-37704. [PMID: 35541823 PMCID: PMC9075727 DOI: 10.1039/c9ra06737j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 11/01/2019] [Indexed: 02/01/2023] Open
Abstract
A theoretical approach was used to investigate the hydrolytic cleavage mechanisms of the bis(p-nitrophenyl) phosphate (BNPP-) catalyzed by Zn(ii)-complexes featuring uncoordinated nucleophiles. Ligand-based and alternative solvent-based nucleophilic attack reaction models are proposed. The pK a values of the Zn(ii)-bound water molecules or ligands in the [Zn(L n H)(η-H2O)(H2O)]2+ (n = 1, 2 and 3) complexes, as well as the dimerization tendency of the mononuclear Zn(ii)-complexes, were found to significantly influence the reaction mechanisms. The Zn(ii)-L3 complexes were found to be more favorable for the hydrolytic cleavage of the BNPP- via a ligand-based nucleophilic attack pathway. This was due to the lower pK a value for the deprotonation of the oxime ligand, the hard dimerization of the mononuclear Zn(ii)-L3 species, and the presence of an uncoordinated nucleophile. The origins of the uncoordinated reactions were systematically elucidated. The theoretical results reported here are in good agreement with experimental observations and more importantly, help to elucidate the factors that influence intermolecular nucleophilic attack reactions with coordinated/uncoordinated nucleophiles.
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Affiliation(s)
- Xiaoyu Zhou
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Xue-Peng Zhang
- School of Chemisty and Chemical Engineering, Shaanxi Normal University Xi'an 710119 P. R. China
| | - Weikang Li
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Jingxing Jiang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, School of Materials Science and Engineering, Sun Yat-sen University Guangzhou 510275 P. R. China
| | - Huiying Xu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Zhuofeng Ke
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, School of Materials Science and Engineering, Sun Yat-sen University Guangzhou 510275 P. R. China
| | - David Lee Phillips
- Department of Chemistry, University of Hong Kong Pokfulam Road Hong Kong P. R. China
| | - Cunyuan Zhao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University Guangzhou 510275 P. R. China
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Thakur A, Baba R, Wada T, Chammingkwan P, Taniike T. Cooperative Catalysis by Multiple Active Centers of a Half-Titanocene Catalyst Integrated in Polymer Random Coils. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00214] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Ashutosh Thakur
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Ryuki Baba
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Toru Wada
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Patchanee Chammingkwan
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Toshiaki Taniike
- Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
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16
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Cao S, Cheng R, Wang D, Zhao Y, Tang R, Yang X, Chen J. Dinuclear copper(II) complexes of “end-off” bicompartmental ligands: Alteration of the chelating arms on ligands to regulate the reactivity of the complexes towards DNA. J Inorg Biochem 2019; 192:126-139. [DOI: 10.1016/j.jinorgbio.2018.12.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 12/23/2018] [Accepted: 12/24/2018] [Indexed: 01/08/2023]
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17
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Heterodinuclear Zn(II)−Fe(III) and Homodinuclear M(II)−M(II) [M = Zn and Ni] complexes of a Bicompartmental [N 6 O] ligand as synthetic mimics of the hydrolase family of enzymes. J Inorg Biochem 2018; 185:30-42. [DOI: 10.1016/j.jinorgbio.2018.04.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 04/23/2018] [Accepted: 04/27/2018] [Indexed: 11/20/2022]
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18
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Das B, Daver H, Pyrkosz-Bulska M, Gumienna-Kontecka E, Himo F, Nordlander E. An Unsymmetric Ligand with a N5
O2
Donor Set and Its Corresponding Dizinc Complex: A Structural and Functional Phosphoesterase Model. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701416] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Biswanath Das
- Chemical Physics; Department of Chemistry; Lund University; Box 124 22100 Lund Sweden
| | - Henrik Daver
- Department of Organic Chemistry; Arrhenius Laboratory; Stockholm University; 106 91 Stockholm Sweden
| | - Monika Pyrkosz-Bulska
- Faculty of Chemistry; Arrhenius Laboratory; University of Wroclaw; F. Joliot-Curie Street 14 50-383 Wroclaw Poland
- Institute of Chemistry; Arrhenius Laboratory; University of Silesia; Szkolna 9 40-006 Katowice Poland
| | - Elzbieta Gumienna-Kontecka
- Faculty of Chemistry; Arrhenius Laboratory; University of Wroclaw; F. Joliot-Curie Street 14 50-383 Wroclaw Poland
| | - Fahmi Himo
- Department of Organic Chemistry; Arrhenius Laboratory; Stockholm University; 106 91 Stockholm Sweden
| | - Ebbe Nordlander
- Chemical Physics; Department of Chemistry; Lund University; Box 124 22100 Lund Sweden
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19
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Pathak C, Gangwar MK, Ghosh P. Homodinuclear [Fe(III)−Fe(III)] and [Zn(II)−Zn(II)] complexes of a binucleating [N4O3] symmetrical ligand with purple acid phosphatase (PAP) and zinc phosphoesterase like activity. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.01.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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Massoud SS, Ledet CC, Junk T, Bosch S, Comba P, Herchel R, Hošek J, Trávníček Z, Fischer RC, Mautner FA. Dinuclear metal(ii)-acetato complexes based on bicompartmental 4-chlorophenolate: syntheses, structures, magnetic properties, DNA interactions and phosphodiester hydrolysis. Dalton Trans 2018; 45:12933-50. [PMID: 27479361 DOI: 10.1039/c6dt02596j] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A series of dinuclear metal(ii)-acetato complexes: [Ni2(μ-L(Cl)O)(μ2-OAc)2](PF6)·3H2O (1), [Ni2(μ-L(Cl)O)(μ2-OAc)2](ClO4)·CH3COCH3 (2), [Cu2(μ-L(Cl)O)(μ2-OAc)(ClO4)](ClO4) (3), [Cu2(μ-L(Cl)O)(OAc)2](PF6)·H2O (4), [Zn2(μ-L(Cl)O)(μ2-OAc)2](PF6) (5) and [Mn2(L(Cl)-O)(μ2-OAc)2](ClO4)·H2O (6), where L(Cl)O(-) = 2,6-bis[bis(2-pyridylmethyl)aminomethyl]-4-chlorophenolate, were synthesized. The complexes were structurally characterized by spectroscopic techniques and single crystal X-ray crystallography. Six-coordinate geometries with doubly bridged acetato ligands were found in Ni(ii), Zn(ii) and Mn(ii) complexes 1, 2, 5 and 6, whereas with Cu(ii) complexes a five-coordinate species was obtained with 4, and mixed five- and six-coordinate geometries with a doubly bridged dimetal core were observed in 3. The magnetic properties of complexes 1-4 and 6 were studied at variable temperatures and revealed weak to very weak antiferromagnetic interactions in 1, 2, 4 and 6 (J = -0.55 to -9.4 cm(-1)) and ferromagnetic coupling in 3 (J = 15.4 cm(-1)). These results are consistent with DFT calculations performed at the B3LYP/def2-TZVP(-f) level of theory. Under physiological conditions, the interaction of the dinculear complexes 1-5 with supercoiled plasmid ds-DNA did not show any pronounced nuclease activity, but Ni(ii) complexes 1 and 2 revealed a strong ability to unwind the supercoiled conformation of ds-DNA. The mechanistic studies performed on the interaction of the Ni(ii) complexes with DNA demonstrated the important impact of the nickel(ii) ion in the unwinding process. In combination with the DNA study, the phosphatase activity of complexes 1, 3, and 5 was examined by the phosphodiester hydrolysis of bis(2,4-dinitrophenol)phosphate (BDNPP) in the pH range of 5.5-10.5 at 25 °C. The Michaelis-Menten kinetics performed at pH 7 and 10.7 showed that catalytic efficiencies kcat/KM (kcat = catalytic rate constant, KM = substrate binding constant) decrease in the order: Ni(ii), 1 > Zn(ii), 5 > Cu(ii), 3. A similar trend was also observed with the turnover numbers at pH = 7. The results are discussed in relation to the coordination geometry and nature of the metal center as well as the steric environment imposed by the compartmental phenoxido ligand.
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Affiliation(s)
- Salah S Massoud
- Department of Chemistry, University of Louisiana at Lafayette, Lafayette, LA 70504, USA.
| | - Catherine C Ledet
- Department of Chemistry, University of Louisiana at Lafayette, Lafayette, LA 70504, USA.
| | - Thomas Junk
- Department of Chemistry, University of Louisiana at Lafayette, Lafayette, LA 70504, USA.
| | - Simone Bosch
- Anorganisch-Chemisches Institut and Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.
| | - Peter Comba
- Anorganisch-Chemisches Institut and Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.
| | - Radovan Herchel
- Department of Inorganic Chemistry & Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, CZ-77146 Olomouc, Czech Republic.
| | - Jan Hošek
- Department of Inorganic Chemistry & Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, CZ-77146 Olomouc, Czech Republic.
| | - Zdeněk Trávníček
- Department of Inorganic Chemistry & Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, CZ-77146 Olomouc, Czech Republic.
| | - Roland C Fischer
- Institut für Anorganische Chemische, Technische Universität Graz, Stremayrgasse 9/V, A-8010 Graz, Austria
| | - Franz A Mautner
- Institut für Physikalische and Theoretische Chemie, Technische Universität Graz, Stremayrgasse 9/II, A-8010, Graz, Austria.
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21
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Xiao D, Do LH. Triazolecarboxamidate Donors as Supporting Ligands for Nickel Olefin Polymerization Catalysts. Organometallics 2018. [DOI: 10.1021/acs.organomet.7b00807] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dawei Xiao
- Department of Chemistry, University of Houston, 4800 Calhoun Road, Houston, Texas 77004, United States
| | - Loi H. Do
- Department of Chemistry, University of Houston, 4800 Calhoun Road, Houston, Texas 77004, United States
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22
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Camargo TP, Neves A, Peralta RA, Chaves C, Maia ECP, Lizarazo-Jaimes EH, Gomes DA, Bortolotto T, Norberto DR, Terenzi H, Tierney DL, Schenk G. Second-Sphere Effects in Dinuclear FeIIIZnII Hydrolase Biomimetics: Tuning Binding and Reactivity Properties. Inorg Chem 2017; 57:187-203. [DOI: 10.1021/acs.inorgchem.7b02384] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - David L. Tierney
- Department
of Chemistry and Biochemistry, Miami University, Oxford, Ohio 45056, United States,
| | - Gerhard Schenk
- School
of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia
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23
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Zeng YN, Xing QF, Ma YP, Sun WH. Dinuclear nickel(II) chlorides bearing N,N′-bis(5,6,7-trihydroquinolin-8-ylidene)-[1,1′-biphenyl]-4,4′-diamines: Synthesis and ethylene polymerization. CHINESE JOURNAL OF POLYMER SCIENCE 2017. [DOI: 10.1007/s10118-018-2054-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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24
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Pathak C, Gupta SK, Gangwar MK, Prakasham AP, Ghosh P. Modeling the Active Site of the Purple Acid Phosphatase Enzyme with Hetero-Dinuclear Mixed Valence M(II)-Fe(III) [M = Zn, Ni, Co, and Cu] Complexes Supported over a [N 6O] Unsymmetrical Ligand. ACS OMEGA 2017; 2:4737-4750. [PMID: 31457757 PMCID: PMC6641979 DOI: 10.1021/acsomega.7b00671] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2017] [Accepted: 08/08/2017] [Indexed: 05/13/2023]
Abstract
The active site of the purple acid phosphatase enzyme has been successfully modeled by a series of hetero-dinuclear M(II)-Fe(III) [M = Zn, Ni, Co, and Cu] type complexes of an unsymmetrical [N6O] ligand that contained a bridging phenoxide moiety and one imidazoyl and three pyridyl moieties as the terminal N-binding sites. In particular, the hetero-dinuclear complexes, {L[MII(μ-OAc)2FeIII]}(ClO4)2 [M = Zn (3a), Ni (3b), Co (4a), and Cu (4b)], were obtained directly from the phenoxy-bridged ligand (HL), namely 2-{[bis(2-methylpyridyl)amino]methyl}-6-{[((1-methylimidazol-2-yl)methyl)(2-pyridylmethyl)amino]methyl}-4-t-butylphenol (2), upon sequential addition of Fe(ClO4)3·XH2O and M(ClO4)2·6H2O (M = Zn and Ni) or M(OAc)2·XH2O (M = Co and Cu), in a low-to-moderate (ca. 32-53%) yield. The temperature-dependent magnetic susceptibility measurements indicated weak antiferromagnetic coupling interactions occurring between the two metal centers in their high-spin states. All of the 3(a-b) and 4(a-b) complexes successfully carried out the hydrolysis of the bis(2,4-dinitrophenyl)phosphate (2,4-BDNPP) substrate in a mixed CH3CN/H2O (v/v 1:1) medium in the pH range of 5.5-10.5 at room temperature, thereby mimicking the functional activity of the native enzyme. The spectrophotometric titration suggested a monoaquated and dihydroxo species of the type {L[(H2O)MII(μ-OH)FeIII(OH)]}2+ to be the catalytically active species for the phosphodiester hydrolysis reaction within the pH range of ca. 5.80-7.15. Last, the kinetic studies on the hydrolysis of the model substrate, 2,4-BDNPP, divulge a Michaelis-Menten-type behavior for all complexes.
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25
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Anjana SS, Varghese B, Prasad E. Dinuclear cobalt(II) complexes with double phosphate ester bridges and tetradentate ligands having anisole or quinoline appendages. Acta Crystallogr C 2017; 73:492-497. [DOI: 10.1107/s2053229617007355] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 05/17/2017] [Indexed: 11/11/2022] Open
Abstract
Phosphate esters provide a rigid and stable polymeric backbone in nucleic acids. Metal complexes with phosphate ester groups have been synthesized as structural and spectroscopic models of phosphate-containing enzymes. Dinucleating ligands are used extensively to synthesize model complexes since they provide the support required to stabilize such complexes. The crystal structures of two dinuclear CoII complexes, namely bis(μ-diphenyl phosphato-κ2
O:O′)bis({2-methoxy-N,N-bis[(pyridin-2-yl)methyl]aniline-κ4
N,N′,N′′,O}cobalt(II)) bis(perchlorate), [Co(C12H10O4P)2(C19H19N3O)2](ClO4)2, and bis(μ-diphenyl phosphato-κ2
O:O′)bis({N,N-bis[(pyridin-2-yl)methyl]quinolin-8-amine-κ4
N,N′,N′′,O}cobalt(II)) bis(perchlorate), [Co(C12H10O4P)2(C21H18N4)2](ClO4)2, with tetradentate 2-methoxy-N,N-bis[(pyridin-2-yl)methyl]aniline (L
1) and N,N-bis[(pyridin-2-yl)methyl]quinolin-8-amine (L
2) ligands are reported. The complexes have similar structures, with distorted octahedral geometries around the metal centres. Both are centrosymmetric (Z′ = 0.5), with the CoII centres doubly bridged by diphenyl phosphate ester groups. A number of aromatic–aromatic interactions are present and differ between the two complexes as the anisole group in L
1 is replaced by a quinoline group in L
2. A detailed study of these interactions is presented.
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26
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Barman SK, Mondal T, Koley D, Lloret F, Mukherjee R. A phenoxo-bridged dicopper(ii) complex as a model for phosphatase activity: mechanistic insights from a combined experimental and computational study. Dalton Trans 2017; 46:4038-4054. [PMID: 28271106 DOI: 10.1039/c6dt03514k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A μ-phenoxo-bis(μ2-1,3-acetato)-bridged dicopper(ii) complex [Cu(L1)(μ-O2CMe)2][NO3] (1) has been synthesized from the perspective of modeling phosphodiesterase activity. Structural characterization was done initially with 1·3Et2O (vapour diffusion of Et2O into MeOH solution of 1; poor crystal quality) and finally with its perchlorate salt [Cu(L1)(μ-O2CMe)2][ClO4]·1.375MeCN·0.25H2O, crystallized from vapour diffusion of n-pentane into a MeCN-MeOH mixture (comparatively better crystal quality). An asymmetric unit of such a crystal contains two independent molecules of compositions [Cu(L1)(μ-O2CMe)2][ClO4] and [Cu(L1)(μ-O2CMe)2(MeCN)][ClO4] (coordinated MeCN with 0.75 occupancy), and two molecules of MeCN and H2O (each H2O molecule with 0.25 occupancy) as the solvent of crystallization. These two cations, each having five-coordinate (μ-phenoxo)bis(μ-acetato)-bridged CuII ions, differ by only the coordination environment of only one CuII ion, which has a weakly coordinated acetonitrile molecule in its sixth position. Temperature-dependent magnetic studies on 1 reveal that the copper(ii) centres are antiferromagnetically coupled with the exchange-coupling constant J = -124(1) cm-1. Theoretically calculated J = -126.51 cm-1, employing a broken-symmetry DFT approach, is in excellent agreement with the experimental value. The dicopper(ii) complex has been found to be catalytically efficient in the hydrolysis of 2-hydroxypropyl-p-nitrophenylphosphate (HPNP). Detailed kinetic experiments and solution studies (potentiometry, species distribution and ESI-MS) were performed to elucidate the reaction mechanism. DFT calculations were performed to discriminate between different possible mechanistic pathways. The free-energy barrier for HPNP hydrolysis catalyzed by 1 is comparable to that obtained from the experimentally-determined value. The involvement of non-covalent (hydrogen-bonding) interaction has also been probed by DFT calculations. The activity of 1 is found to be the highest, compared to the structurally-characterized Mn, Co, Ni and Zn complexes of L1(-) reported earlier, under identical experimental conditions, in which each metal centre is six-coordinate.
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Affiliation(s)
- Suman K Barman
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, India. and Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741 246, India
| | - Totan Mondal
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741 246, India
| | - Debasis Koley
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741 246, India
| | - Francesc Lloret
- Departament de Química Inorgànica/Fundació General de la Universitat de València (FGUV)/Instituto de Ciencia, Molecular (ICMOL), Universitat de València, Polígono de la Coma, s/n, 46980-Paterna, València, Spain
| | - Rabindranath Mukherjee
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, India. and Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741 246, India
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27
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Silva GADS, Amorim AL, Souza BD, Gabriel P, Terenzi H, Nordlander E, Neves A, Peralta RA. Synthesis and characterization of FeIII(μ-OH)ZnII complexes: effects of a second coordination sphere and increase in the chelate ring size on the hydrolysis of a phosphate diester and DNA. Dalton Trans 2017; 46:11380-11394. [DOI: 10.1039/c7dt02035j] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Effects of a second coordination sphere and of the chelate ring size in FeIII(μ-OH)ZnII complexes properties and catalysis.
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Affiliation(s)
| | - André Luiz Amorim
- Departamento de Química
- Universidade Federal de Santa Catarina
- 88040-900 Florianópolis
- Brazil
| | - Bernardo de Souza
- Departamento de Química
- Universidade Federal de Santa Catarina
- 88040-900 Florianópolis
- Brazil
| | - Philipe Gabriel
- Centro de Biologia Molecular Estrutural
- Departamento de Bioquímica
- Universidade Federal de Santa Catarina
- Florianópolis
- Brazil
| | - Hernán Terenzi
- Centro de Biologia Molecular Estrutural
- Departamento de Bioquímica
- Universidade Federal de Santa Catarina
- Florianópolis
- Brazil
| | - Ebbe Nordlander
- Inorganic Chemistry Research Group
- Chemical Physics
- Center for Chemistry and Chemical Engineering
- Lund University
- SE-221 00 Lund
| | - Ademir Neves
- Departamento de Química
- Universidade Federal de Santa Catarina
- 88040-900 Florianópolis
- Brazil
| | - Rosely A. Peralta
- Departamento de Química
- Universidade Federal de Santa Catarina
- 88040-900 Florianópolis
- Brazil
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28
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Comba P, Eisenschmidt A, Gahan LR, Hanson GR, Mehrkens N, Westphal M. Dinuclear Zn II and mixed Cu II-Zn II complexes of artificial patellamides as phosphatase models. Dalton Trans 2016; 45:18931-18945. [PMID: 27841434 DOI: 10.1039/c6dt03787a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The patellamides (cyclic pseudo-octapeptides) are produced by Prochloron, a symbiont of the ascidians, marine invertebrate filter feeders. These pseudo-octapeptides are present in the cytoplasm and a possible natural function of putative metal complexes of these compounds is hydrolase activity, however the true biological role is still unknown. The dinuclear CuII complexes of synthetic patellamide derivatives have been shown in in vitro experiments to be efficient hydrolase model catalysts. Many hydrolase enzymes, specifically phosphatases and carboanhydrases, are ZnII-based enzymes and therefore, we have studied the ZnII and mixed ZnII/CuII solution chemistry of a series of synthetic patellamide derivatives, including solution structural and computational work, with the special focus on model phosphatase chemistry with bis-(2,4-dinitrophenyl)phosphate (BDNPP) as the substrate. The ZnII complexes of a series of ligands are shown to form complexes of similar structure and stability compared to the well-studied CuII analogues and the phosphatase reactivities are also similar. Since the complex stabilities and phosphatase activities are generally a little lower compared to those of CuII and since the concentration of ZnII in Prochloron cells is slightly smaller, we conclude that the CuII complexes of the patellamides are more likely to be of biological importance.
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Affiliation(s)
- Peter Comba
- Universität Heidelberg, Anorganisch-Chemisches Institut und Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), INF 270, D-69120 Heidelberg, Germany.
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Haldar S, Patra A, Vijaykumar G, Carrella L, Bera M. Dinuclear and tetranuclear complexes of copper coordinated by an anthracene-based new μ-bis(tridentate) ligand: Synthesis, structure, spectroscopy and magnetic properties. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.06.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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30
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Glaser T, Fischer von Mollard G, Anselmetti D. Rational design of dinuclear complexes binding at two neighboring phosphate esters of DNA. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.02.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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31
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Brown JJ, Gahan LR, Schöffler A, Krenske EH, Schenk G. Investigation of the identity of the nucleophile initiating the hydrolysis of phosphate esters catalyzed by dinuclear mimics of metallohydrolases. J Inorg Biochem 2016; 162:356-365. [DOI: 10.1016/j.jinorgbio.2016.02.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 01/17/2016] [Accepted: 02/10/2016] [Indexed: 11/17/2022]
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32
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Agura K, Hayashi Y, Wada M, Nakatake D, Mashima K, Ohshima T. Studies of the Electronic Effects of Zinc Cluster Catalysts and Their Application to the Transesterification of β‐Keto Esters. Chem Asian J 2016; 11:1548-54. [DOI: 10.1002/asia.201600062] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Indexed: 12/15/2022]
Affiliation(s)
- Kazushi Agura
- Graduate School of Pharmaceutical Sciences Kyushu University, CREST Maidashi Higashi-ku Fukuoka 812-8582 Japan
| | - Yukiko Hayashi
- Department of Chemistry Graduate School of Engineering Science Osaka University, CREST Toyonaka Osaka 560-8631 Japan
| | - Mari Wada
- Graduate School of Pharmaceutical Sciences Kyushu University, CREST Maidashi Higashi-ku Fukuoka 812-8582 Japan
| | - Daiki Nakatake
- Graduate School of Pharmaceutical Sciences Kyushu University, CREST Maidashi Higashi-ku Fukuoka 812-8582 Japan
| | - Kazushi Mashima
- Department of Chemistry Graduate School of Engineering Science Osaka University, CREST Toyonaka Osaka 560-8631 Japan
| | - Takashi Ohshima
- Graduate School of Pharmaceutical Sciences Kyushu University, CREST Maidashi Higashi-ku Fukuoka 812-8582 Japan
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33
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Xavier FR, Neves A. Synthesis, physicochemical properties and in vitro catalytic activity of a dinuclear nickel(II) complex with a N5O-hexadentate ligand: A functional model for phosphohydrolases. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.02.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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34
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Pal N, Majumdar A. Controlling the Reactivity of Bifunctional Ligands: Carboxylate-Bridged Nonheme Diiron(II) Complexes Bearing Free Thiol Groups. Inorg Chem 2016; 55:3181-91. [DOI: 10.1021/acs.inorgchem.6b00316] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nabhendu Pal
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata-700032, India
| | - Amit Majumdar
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata-700032, India
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35
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36
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Mendes LL, Englert D, Fernandes C, Gahan LR, Schenk G, Horn A. Metallohydrolase biomimetics with catalytic and structural flexibility. Dalton Trans 2016; 45:18510-18521. [DOI: 10.1039/c6dt03200a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The phosphatase activity of zinc complexes containing six- and seven-dentate ligands was evaluated through kinetic and31P NMR studies.
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Affiliation(s)
- Luisa L. Mendes
- Laboratório de Ciências Químicas
- Universidade Estadual do Norte Fluminense
- Campos dos Goytacazes/RJ
- Brazil
| | - Daniel Englert
- Anorganisch-Chemisches Institut
- Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Christiane Fernandes
- Laboratório de Ciências Químicas
- Universidade Estadual do Norte Fluminense
- Campos dos Goytacazes/RJ
- Brazil
| | - Lawrence R. Gahan
- School of Chemistry and Molecular Biosciences
- The University of Queensland
- Brisbane
- Australia
| | - Gerhard Schenk
- School of Chemistry and Molecular Biosciences
- The University of Queensland
- Brisbane
- Australia
| | - Adolfo Horn
- Laboratório de Ciências Químicas
- Universidade Estadual do Norte Fluminense
- Campos dos Goytacazes/RJ
- Brazil
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37
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Hisamatsu Y, Miyazawa Y, Yoneda K, Miyauchi M, Zulkefeli M, Aoki S. Supramolecular Complexes Formed by the Self-assembly of Hydrophobic Bis(Zn 2+-cyclen) Complexes, Copper, and Di- or Triimide Units for the Hydrolysis of Phosphate Mono- and Diesters in Two-Phase Solvent Systems (Cyclen=1,4,7,10-Tetraazacyclododecane). Chem Pharm Bull (Tokyo) 2016; 64:451-64. [DOI: 10.1248/cpb.c15-01014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | - Yuya Miyazawa
- Faculty of Pharmaceutical Sciences, Tokyo University of Science
| | - Kakeru Yoneda
- Faculty of Pharmaceutical Sciences, Tokyo University of Science
| | - Miki Miyauchi
- Faculty of Pharmaceutical Sciences, Tokyo University of Science
| | | | - Shin Aoki
- Faculty of Pharmaceutical Sciences, Tokyo University of Science
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38
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Bosch S, Comba P, Gahan LR, Hanson GR, Noble C, Schenk G, Wadepohl H. Selective Coordination of Gallium(III), Zinc(II), and Copper(II) by an Asymmetric Dinucleating Ligand: A Model for Metallophosphatases. Chemistry 2015; 21:18269-79. [DOI: 10.1002/chem.201503348] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Indexed: 01/09/2023]
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39
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Barba-Bon A, Martínez-Máñez R, Sancenón F, Costero AM, Gil S, Pérez-Pla F, Llopis E. Towards the design of organocatalysts for nerve agents remediation: The case of the active hydrolysis of DCNP (a Tabun mimic) catalyzed by simple amine-containing derivatives. JOURNAL OF HAZARDOUS MATERIALS 2015; 298:73-82. [PMID: 26005922 DOI: 10.1016/j.jhazmat.2015.04.083] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Revised: 03/30/2015] [Accepted: 04/12/2015] [Indexed: 06/04/2023]
Abstract
We report herein a study of the hydrolysis of Tabun mimic DCNP in the presence of different amines, aminoalcohols and glycols as potential suitable organocatalysts for DCNP degradation. Experiments were performed in CD3CN in the presence of 5% D2O, which is a suitable solvent mixture to follow the DCNP hydrolysis. These studies allowed the definition of different DCNP depletion paths, resulting in the formation of diethylphosphoric acid, tetraethylpyrophosphate and phosphoramide species as final products. Without organocatalysts, DCNP hydrolysis occurred mainly via an autocatalysis path. Addition of tertiary amines in sub-stoichiometric amounts largely enhanced DCNP depletion whereas non-tertiary polyamines reacted even faster. Glycols induced very slight increment in the DCNP hydrolysis, whereas DCNP hydrolysis increased sharply in the presence of certain aminoalcohols especially, 2-(2-aminoethylamino)ethanol. For the latter compound, DCNP depletion occurred ca. 80-fold faster than in the absence of organocatalysts. The kinetic studies revealed that DCNP hydrolysis in the presence of 2-(2-aminoethylamino)ethanol occurred via a catalytic process, in which the aminoalcohol was involved. DCNP hydrolysis generally depended strongly on the structure of the amine, and it was found that the presence of the OHCH2CH2N moiety in the organocatalyst structure seems important to induce a fast degradation of DCNP.
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Affiliation(s)
- Andrea Barba-Bon
- Centro de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Unidad Mixta Universidad Politécnica de Valencia-Universidad de Valencia, Spain; Departamento de Química, Universidad Politécnica de Valencia, Camino de Vera s/n, 46022 Valencia, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BNN), Spain
| | - Ramón Martínez-Máñez
- Centro de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Unidad Mixta Universidad Politécnica de Valencia-Universidad de Valencia, Spain; Departamento de Química, Universidad Politécnica de Valencia, Camino de Vera s/n, 46022 Valencia, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BNN), Spain
| | - Félix Sancenón
- Centro de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Unidad Mixta Universidad Politécnica de Valencia-Universidad de Valencia, Spain; Departamento de Química, Universidad Politécnica de Valencia, Camino de Vera s/n, 46022 Valencia, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BNN), Spain
| | - Ana M Costero
- Centro de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Unidad Mixta Universidad Politécnica de Valencia-Universidad de Valencia, Spain; Departamento de Química Orgánica, Universitat de València, Dr. Moliner 50, 46100 Burjassot, Valencia, Spain.
| | - Salvador Gil
- Centro de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Unidad Mixta Universidad Politécnica de Valencia-Universidad de Valencia, Spain; Departamento de Química Orgánica, Universitat de València, Dr. Moliner 50, 46100 Burjassot, Valencia, Spain
| | - Francisco Pérez-Pla
- Institut de Cíencia dels Materials (ICMUV), c/ Catedrtico Beltrán 2, 46980 Valencia, Spain.
| | - Elisa Llopis
- Institut de Cíencia dels Materials (ICMUV), c/ Catedrtico Beltrán 2, 46980 Valencia, Spain
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40
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Sanyal R, Chakraborty P, Zangrando E, Das D. Phosphatase models: Synthesis, structure and catalytic activity of zinc complexes derived from a phenolic Mannich-base ligand. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.05.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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41
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Bernhardt PV, Bosch S, Comba P, Gahan LR, Hanson GR, Mereacre V, Noble CJ, Powell AK, Schenk G, Wadepohl H. An Approach to More Accurate Model Systems for Purple Acid Phosphatases (PAPs). Inorg Chem 2015. [DOI: 10.1021/acs.inorgchem.5b00628] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Paul V. Bernhardt
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Simone Bosch
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
- Anorganisch-Chemisches Institut and Interdisciplinary
Center for Scientific Computing (IWR), Universität Heidelberg, Im Neuenheimer
Feld 270, D-69120 Heidelberg, Germany
| | - Peter Comba
- Anorganisch-Chemisches Institut and Interdisciplinary
Center for Scientific Computing (IWR), Universität Heidelberg, Im Neuenheimer
Feld 270, D-69120 Heidelberg, Germany
| | - Lawrence R. Gahan
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Graeme R. Hanson
- Centre for Advanced
Imaging, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Valeriu Mereacre
- Institut für Anorganisch Chemie, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, D-76131 Karlsruhe, Germany
| | - Christopher J. Noble
- Centre for Advanced
Imaging, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Annie K. Powell
- Institut für Anorganisch Chemie, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, D-76131 Karlsruhe, Germany
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), P.O. Box 3640, D-76021 Karlsruhe, Germany
| | - Gerhard Schenk
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut and Interdisciplinary
Center for Scientific Computing (IWR), Universität Heidelberg, Im Neuenheimer
Feld 270, D-69120 Heidelberg, Germany
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42
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Roberts AE, Schenk G, Gahan LR. A Heterodinuclear FeIIIZnIIComplex as a Mimic for Purple Acid Phosphatase with Site-Specific ZnIIBinding. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500351] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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43
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Tirel EY, Williams NH. Enhancing Phosphate Diester Cleavage by a Zinc Complex through Controlling Nucleophile Coordination. Chemistry 2015; 21:7053-6. [PMID: 25787696 DOI: 10.1002/chem.201500619] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Indexed: 11/11/2022]
Abstract
Metal-ion complexes are the most effective artificial catalysts capable of cleaving phosphate diesters under mild aqueous conditions. A central strategy for making these complexes highly reactive has been to use ligand-based alcohols that are coordinated to the ion, providing an ionised nucleophile under neutral conditions but at the expense of deactivating it. We have created a highly reactive Zn complex that is 350-fold more reactive than an alcohol analogue by preventing the nucleophile binding to the metal ion. This strategy successfully delivers the benefits of efficient nucleophile delivery without strongly deactivating the metal ion Lewis acidity nor the oxyanion nucleophilicity. Varying the leaving group reveals that the transition state of the reaction is much further advanced than the reaction with hydroxide.
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Affiliation(s)
- Emmanuel Y Tirel
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF (UK)
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44
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Novel anion-tunable structural diversity and new topologies in CuII complexes of a Schiff base. Polyhedron 2015. [DOI: 10.1016/j.poly.2014.11.033] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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45
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Sanyal R, Zhang X, Kundu P, Chattopadhyay T, Zhao C, Mautner FA, Das D. Mechanistic Implications in the Phosphatase Activity of Mannich-Based Dinuclear Zinc Complexes with Theoretical Modeling. Inorg Chem 2015; 54:2315-24. [DOI: 10.1021/ic502937a] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Ria Sanyal
- Department
of Chemistry, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, India
| | - Xuepeng Zhang
- MOE
Key Laboratory of Bioinorganic and Synthetic Chemistry, School of
Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Priyanka Kundu
- Department
of Chemistry, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, India
| | - Tanmay Chattopadhyay
- Department
of Chemistry, Panchakot Mahavidyalaya, Sarbari, Purulia 723121, India
| | - Cunyuan Zhao
- MOE
Key Laboratory of Bioinorganic and Synthetic Chemistry, School of
Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Franz A. Mautner
- Institut
fuer Physikalische und Theoretische Chemie, Technische Universitaet Graz, A-8010 Graz, Austria
| | - Debasis Das
- Department
of Chemistry, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, India
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46
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Zhang X, Zheng X, Phillips DL, Zhao C. Mechanistic investigation of the cleavage of phosphodiester catalyzed by a symmetrical oxyimine-based macrocyclic dinuclear zinc complex: a DFT study. Dalton Trans 2014; 43:16289-99. [DOI: 10.1039/c4dt01491j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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47
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Zulkefeli M, Hisamatsu Y, Suzuki A, Miyazawa Y, Shiro M, Aoki S. Supramolecular Phosphatases Formed by the Self-Assembly of the Bis(Zn2+-Cyclen) Complex, Copper(II), and Barbital Derivatives in Water. Chem Asian J 2014; 9:2831-41. [DOI: 10.1002/asia.201402513] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Revised: 06/05/2014] [Indexed: 01/19/2023]
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48
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Tirel EY, Bellamy Z, Adams H, Lebrun V, Duarte F, Williams NH. Catalytic zinc complexes for phosphate diester hydrolysis. Angew Chem Int Ed Engl 2014; 53:8246-50. [PMID: 24919567 PMCID: PMC4140542 DOI: 10.1002/anie.201400335] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2014] [Revised: 03/21/2014] [Indexed: 12/19/2022]
Abstract
Creating efficient artificial catalysts that can compete with biocatalysis has been an enduring challenge which has yet to be met. Reported herein is the synthesis and characterization of a series of zinc complexes designed to catalyze the hydrolysis of phosphate diesters. By introducing a hydrated aldehyde into the ligand we achieve turnover for DNA-like substrates which, combined with ligand methylation, increases reactivity by two orders of magnitude. In contrast to current orthodoxy and mechanistic explanations, we propose a mechanism where the nucleophile is not coordinated to the metal ion, but involves a tautomer with a more effective Lewis acid and more reactive nucleophile. This data suggests a new strategy for creating more efficient metal ion based catalysts, and highlights a possible mode of action for metalloenzymes.
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Affiliation(s)
| | - Zoë Bellamy
- Department of Chemistry, Sheffield UniversitySheffield (UK)
| | - Harry Adams
- Department of Chemistry, Sheffield UniversitySheffield (UK)
| | - Vincent Lebrun
- Department of Chemistry, Sheffield UniversitySheffield (UK)
| | - Fernanda Duarte
- Department of Cell and Molecular Biology, Uppsala UniversityUppsala (Sweden)
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49
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Lee J, Muthaiah S, Hong SH. Tandem Synthesis of Amides and Secondary Amines from Esters with Primary Amines under Solvent-Free Conditions. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400319] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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50
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Montagner D, Gandin V, Marzano C, Erxleben A. Phosphate Diester Cleavage, DNA Interaction and Cytotoxic Activity of a Bimetallic Bis(1,4,7-triazacyclononane) Zinc Complex. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402319] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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