51
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Bazzicalupi C, Bianchi A, García-España E, Delgado-Pinar E. Metals in supramolecular chemistry. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.03.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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52
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Abstract
We have prepared L- and D-deoxypolypeptides (DOPPs) by selective reduction of appropriately protected polyhistidines with borane, reducing the carbonyl groups to methylenes. The result is a chiral polyamine, not amide, with a mainly protonated backbone and chirally mounted imidazolylmethylene side chains that are mostly unprotonated at neutrality because of the nearby polycationic backbone. We found that, in contrast with the D-octahistidine DOPP, the L-octahistidine DOPP is able to cooperatively bind to a D-polyuridylic acid RNA; this is consistent with results of previous studies showing that, relative to D-histidine, L-histidine is able to more strongly bind to RNA. The L-DOPP was also a better catalyst for cleaving the RNA than the D-DOPP, consistent with evidence that the L-DOPP uses its imidazole groups for catalysis, in addition to the backbone cations, but the D-DOPP does not use the imidazoles. The L-DOPP bifunctional process probably forms a phosphorane intermediate. This is a mechanism we have proposed for models of ribonuclease cleavage and for the ribonuclease A enzyme itself, based on our studies of the cleavage and isomerization of UpU catalyzed by imidazole buffers as well as other relevant studies. This mechanism contrasts with earlier, generally accepted ribonuclease cleavage mechanisms where the proton donor coordinates with the oxygen of the leaving group as the 2-hydroxyl of ribose attacks the unprotonated phosphate.
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53
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Ghidini A, Ander C, Winqvist A, Strömberg R. An RNA modification with remarkable resistance to RNase A. Chem Commun (Camb) 2014; 49:9036-8. [PMID: 23982594 DOI: 10.1039/c3cc44621b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A 3'-deoxy-3'-C-methylenephosphonate modified diribonucleotide is highly resistant to degradation by spleen phosphodiesterase and not cleaved at all by snake venom phosphodiesterase. The most remarkable finding is that, despite the fact that both the vicinal 2-hydroxy nucleophile and the 5'-oxyanion leaving group are intact, the 3'-methylenephosponate RNA modification is also highly resistant towards the action of RNase A.
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Affiliation(s)
- Alice Ghidini
- Department of Biosciences and Nutrition, Karolinska Institutet, Novum, Hälsovägen 7, 14183, Huddinge, Sweden.
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54
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Salvio R, Cincotti A. Guanidine based self-assembled monolayers on Au nanoparticles as artificial phosphodiesterases. RSC Adv 2014. [DOI: 10.1039/c4ra03150d] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Gold nanoparticles passivated with a catalytic monolayer based on guanidine exhibit high cooperativity and efficiency in the cleavage of phosphodiesters.
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Affiliation(s)
- Riccardo Salvio
- Dipartimento di Chimica and IMC – CNR Sezione Meccanismi di Reazione
- Università La Sapienza
- 00185 Roma, Italy
| | - Antonio Cincotti
- Dipartimento di Chimica and IMC – CNR Sezione Meccanismi di Reazione
- Università La Sapienza
- 00185 Roma, Italy
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55
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Salvio R, Cacciapaglia R, Mandolini L, Sansone F, Casnati A. Diguanidinocalix[4]arenes as effective and selective catalysts of the cleavage of diribonucleoside monophosphates. RSC Adv 2014. [DOI: 10.1039/c4ra05751a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Upper rim diguanidino-cone-calix[4]arenes catalyze the hydrolytic cleavage of diribonucleoside monophosphates in aqueous DMSO with good substrate selectivity and rate accelerations approaching 105-fold in the most favourable substrate-catalyst combinations.
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Affiliation(s)
- Riccardo Salvio
- Dipartimento di Chimica and IMC – CNR Sezione Meccanismi di Reazione
- Università La Sapienza
- 00185 Roma, Italy
| | - Roberta Cacciapaglia
- Dipartimento di Chimica and IMC – CNR Sezione Meccanismi di Reazione
- Università La Sapienza
- 00185 Roma, Italy
| | - Luigi Mandolini
- Dipartimento di Chimica and IMC – CNR Sezione Meccanismi di Reazione
- Università La Sapienza
- 00185 Roma, Italy
| | - Francesco Sansone
- Dipartimento di Chimica
- Università degli Studi di Parma
- 43124 Parma, Italy
| | - Alessandro Casnati
- Dipartimento di Chimica
- Università degli Studi di Parma
- 43124 Parma, Italy
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56
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Nath JK, Kirillov AM, Baruah JB. Unusual solvent-mediated hydrolysis of dicarboxylate monoester ligands in copper(ii) complexes toward simultaneous crystallization of new dicarboxylate derivatives. RSC Adv 2014. [DOI: 10.1039/c4ra05776g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Unusual transformations of dicarboxylate monoester copper(ii) compounds into crystalline dicarboxylate derivatives were observed in the solid state and investigated in detail by various methods.
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Affiliation(s)
- Jayanta K. Nath
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781 039, India
| | - Alexander M. Kirillov
- Centro de Química Estrutural
- Complexo I
- Instituto Superior Técnico
- Universidade de Lisboa
- Lisbon, Portugal
| | - Jubaraj B. Baruah
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781 039, India
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57
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Maxwell CI, Mosey NJ, Stan Brown R. DFT Computational Study of the Methanolytic Cleavage of DNA and RNA Phosphodiester Models Promoted by the Dinuclear Zn(II) Complex of 1,3-Bis(1,5,9-triazacyclododec-1-yl)propane. J Am Chem Soc 2013; 135:17209-22. [DOI: 10.1021/ja4088264] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | - Nicholas J. Mosey
- Department
of Chemistry, Queen’s University, Kingston, Ontario, Canada K7L 3N6
| | - R. Stan Brown
- Department
of Chemistry, Queen’s University, Kingston, Ontario, Canada K7L 3N6
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58
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Milton S, Ander C, Honcharenko D, Honcharenko M, Yeheskiely E, Strömberg R. Synthesis and Stability of a 2′-O-[N-(Aminoethyl)carbamoyl]methyladenosine-Containing Dinucleotide. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300699] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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59
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Salvio R, Mandolini L, Savelli C. Guanidine-guanidinium cooperation in bifunctional artificial phosphodiesterases based on diphenylmethane spacers; gem-dialkyl effect on catalytic efficiency. J Org Chem 2013; 78:7259-63. [PMID: 23772969 DOI: 10.1021/jo401085z] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Diphenylmethane derivatives 1-3, decorated with two guanidine units, are effective catalysts of HPNP transesterification. Substitution of the methylene group of the parent diphenylmethane spacer with cyclohexylidene and adamantylidene moieties enhances catalytic efficency, with gem-dialkyl effect accelerations of 4.5 and 9.1, respectively. Activation parameters and DFT calculations of the rotational barriers around the C-Ar bonds indicate that a major contribution to the driving force for enhanced catalysis is entropic in nature.
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Affiliation(s)
- Riccardo Salvio
- Dipartimento di Chimica and IMC-CNR Sezione Meccanismi di Reazione, Università La Sapienza, P.le Aldo Moro 5, 00185 Roma, Italy.
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60
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O'Neil EJ, Jiang H, Smith BD. Effect of Bridging Anions on the Structure and Stability of Phenoxide Bridged Zinc Dipicolylamine Coordination Complexes. Supramol Chem 2013; 25:315-322. [PMID: 23914128 PMCID: PMC3728083 DOI: 10.1080/10610278.2013.776170] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A series of four related phenol derivatives, with 2,2'-dipicolylamine substituents at the ortho positions, were prepared and their Zn2+ coordination complexes studied by spectroscopic methods. X-ray crystal diffraction analysis of a dinuclear zinc complex with two bridging acetate anions showed a ternary structure with highly charged interior and lipophilic exterior, which helps explain why this class of water-soluble complexes can effectively diffuse through cell membranes. The stability of the dinuclear zinc complexes in aqueous solution was found to be strongly anion dependent; that is, bridging oxyanions, such as acetate and pyrophosphate, lock the two Zn2+ cations to the surrounding ligand and greatly enhance ligand/zinc affinity. Overall, the results provide new insight into the structural and mechanistic factors that control the recognition and chemosensing performance of phenoxide bridged dipicolylamine molecular probes.
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Affiliation(s)
- Edward J. O'Neil
- Department of Chemistry and Biochemistry, University of Notre Dame, 2365 Nieuwland Science Hall, Notre Dame, IN 46556
| | - Hua Jiang
- Department of Chemistry and Biochemistry, University of Notre Dame, 2365 Nieuwland Science Hall, Notre Dame, IN 46556
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Bradley D. Smith
- Department of Chemistry and Biochemistry, University of Notre Dame, 2365 Nieuwland Science Hall, Notre Dame, IN 46556
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61
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Xu L, Ji C, Bai Y, He J, Liu K. DNA duplex-supported artificial esterase mimicking by cooperative grafting functional groups. Biochem Biophys Res Commun 2013; 434:516-20. [PMID: 23583410 DOI: 10.1016/j.bbrc.2013.03.106] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2013] [Accepted: 03/20/2013] [Indexed: 10/26/2022]
Abstract
The molecular structures of enzyme mimics may be modified to optimize their catalytic properties. In this study, to generate artificial enzyme mimics, Watson-Crick base paired DNA duplexes were designed as scaffolds which were assembled by nucleotides modified with specific functional groups. This process allowed various functional groups to be precisely assembled at different sites on the duplexes. By using this strategy, the 5-[2-(1H-imidazolyl-4)-(E)-ethylene]-2'-deoxythymidine (1) analog with the 5-substituted imidazolyl group was incorporated into single strands of DNA. Upon DNA duplex formation, several combinations of the imidazolyl group were formed. Using p-nitrophenyl acetate as the substrate of the catalytic reaction, we evaluated the hydrolysis capabilities of the imidazolyl assemblies. The catalytic ability was closely related to the distribution of imidazolyl groups in the DNA duplex. The most effective catalytic center was that of the duplex O5-O6 construct with three imidazolyl groups. This construct displayed bell-shaped pH-dependent and Mg(2+)-independent kinetic curves, which are typical characteristics of imidazolyl-mediated catalytic reactions.
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Affiliation(s)
- Liang Xu
- Beijing Institute of Pharmacology and Toxicology, 27 Taiping Road, Beijing 100850, China
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62
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Ganeshpandian M, Loganathan R, Ramakrishnan S, Riyasdeen A, Akbarsha MA, Palaniandavar M. Interaction of mixed ligand copper(II) complexes with CT DNA and BSA: Effect of primary ligand hydrophobicity on DNA and protein binding and cleavage and anticancer activities. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.07.021] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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63
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Tabassum S, Amir S, Arjmand F, Pettinari C, Marchetti F, Masciocchi N, Lupidi G, Pettinari R. Mixed-ligand Cu(II)–vanillin Schiff base complexes; effect of coligands on their DNA binding, DNA cleavage, SOD mimetic and anticancer activity. Eur J Med Chem 2013; 60:216-32. [PMID: 23291123 DOI: 10.1016/j.ejmech.2012.08.019] [Citation(s) in RCA: 102] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2011] [Revised: 07/26/2012] [Accepted: 08/13/2012] [Indexed: 10/28/2022]
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64
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Liu C, Zhu Y, Chen P, Tang M. Theoretical Simulations on Interactions of Mono- and Dinuclear Metallonucleases with DNA. J Phys Chem B 2013; 117:1197-209. [DOI: 10.1021/jp306998f] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Chunmei Liu
- The College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan Province 450001,
PR China
| | - Yanyan Zhu
- The College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan Province 450001,
PR China
| | - Peipei Chen
- The College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan Province 450001,
PR China
| | - Mingsheng Tang
- The College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan Province 450001,
PR China
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65
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Hernández-Gil J, Ferrer S, Salvador E, Calvo J, Garcia-España E, Mareque-Rivas JC. A dinucleating ligand which promotes DNA cleavage with one and without a transition metal ion. Chem Commun (Camb) 2013; 49:3655-7. [DOI: 10.1039/c3cc39067e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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66
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Rahimian M, Gejji SP. Probing mechanism of metal catalyzed hydrolysis of Thymidylyl (3'-O, 5'-S) thymidine phosphodiester derivatives. J Mol Model 2012; 19:1027-37. [PMID: 23111685 DOI: 10.1007/s00894-012-1630-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2012] [Accepted: 10/03/2012] [Indexed: 10/27/2022]
Abstract
Hydrolysis of nucleic acids is of fundamental importance in biological sciences. Kinetic and theoretical studies on different substrates wherein the phosphodiester bond combined with alkyl or aryl groups and sugar moiety have been the focus of attention in recent literature. The present work focuses on understanding the mechanism and energetics of alkali metal (Li, Na, and K) catalyzed hydrolysis of phosphodiester bond in modeled substrates including Thymidylyl (3'-O, 5'-S) thymidine phosphodiester (Tp-ST) (1), 3'-Thymidylyl (1-trifluoroethyl) phosphodiester (Tp-OCH(2)CF(3)) (2), 3'-Thymidylyl (o-cholorophenyl) phosphodiester (Tp-OPh(o-Cl)) (3) and 3'-Thymidylyl(p-nitrophenyl) phosphodiester (Tp-OPh(p-NO(2))) (4) employing density functional theory. Theoretical calculations reveal that the reaction follows a single-step (A(N)D(N)) mechanism where nucleophile attack and leaving group departure take place simultaneously. Activation barrier for potassium catalyzed Tp-ST hydrolysis (12.0 kcal mol(-1)) has been nearly twice as large compared to that for hydrolysis incorporating lithium or sodium. Effect of solvent (water) on activation energies has further been analyzed by adding a water molecule to each metal ion of the substrate. It has been shown that activation barrier of phosphodiester hydrolysis correlates well with basicity of leaving group.
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67
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Yin YX, Wen JH, Geng ZR, Li YZ, Wang ZL. Two heptadentate Co(III) and Mn(III) complexes with partially deprotonated cyclen derivative bearing four hydroxypropyl pendants: structure, DNA binding and DNA cleavage. Appl Organomet Chem 2012. [DOI: 10.1002/aoc.2905] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
| | - Jing-Han Wen
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering; Nanjing University; Nanjing; People's Republic of China
| | - Zhi-Rong Geng
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering; Nanjing University; Nanjing; People's Republic of China
| | - Yi-Zhi Li
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering; Nanjing University; Nanjing; People's Republic of China
| | - Zhi-Lin Wang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering; Nanjing University; Nanjing; People's Republic of China
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68
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Li C, Zhao F, Huang Y, Liu X, Liu Y, Qiao R, Zhao Y. Metal-Free DNA Linearized Nuclease Based on PASP–Polyamine Conjugates. Bioconjug Chem 2012; 23:1832-7. [DOI: 10.1021/bc300162g] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chao Li
- State Key
Laboratory of Chemical
Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Fangfang Zhao
- State Key
Laboratory of Chemical
Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Yunan Huang
- State Key
Laboratory of Chemical
Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Xueyuan Liu
- State Key
Laboratory of Chemical
Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Yan Liu
- Department of Chemistry,
College
of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Renzhong Qiao
- State Key
Laboratory of Chemical
Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
- State Key Laboratory of Natural
and Biomimetic Drugs School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing, 100083,
China
| | - Yufen Zhao
- Department of Chemistry,
College
of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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69
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Mohamed MF, Hollfelder F. Efficient, crosswise catalytic promiscuity among enzymes that catalyze phosphoryl transfer. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2012; 1834:417-24. [PMID: 22885024 DOI: 10.1016/j.bbapap.2012.07.015] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2012] [Revised: 07/19/2012] [Accepted: 07/26/2012] [Indexed: 11/25/2022]
Abstract
The observation that one enzyme can accelerate several chemically distinct reactions was at one time surprising because the enormous efficiency of catalysis was often seen as inextricably linked to specialization for one reaction. Originally underreported, and considered a quirk rather than a fundamental property, enzyme promiscuity is now understood to be important as a springboard for adaptive evolution. Owing to the large number of promiscuous enzymes that have been identified over the last decade, and the increased appreciation for promiscuity's evolutionary importance, the focus of research has shifted to developing a better understanding of the mechanistic basis for promiscuity and the origins of tolerant or restrictive specificity. We review the evidence for widespread crosswise promiscuity amongst enzymes that catalyze phosphoryl transfer, including several members of the alkaline phosphatase superfamily, where large rate accelerations between 10(6) and 10(17) are observed for both native and multiple promiscuous reactions. This article is part of a Special Issue entitled: Chemistry and mechanism of phosphatases, diesterases and triesterases.
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Affiliation(s)
- Mark F Mohamed
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, EU, UK
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70
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Schicke O, Faure B, Giorgi M, Simaan AJ, Réglier M. Binuclear copper(II) complexes 1: Synthesis, characterization and evaluation of a new complex in phosphatase-like activity. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2012.04.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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71
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Synthesis of Aryl-1,2,4,5-tetrazinane-3-thiones, in vitro DNA binding studies, nuclease activity and its antimicrobial activity. J Mol Struct 2012. [DOI: 10.1016/j.molstruc.2012.03.049] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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72
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Kim JH, Lee JH, Lee DW. Hydrolysis of Phosphate Esters Mediated by New Unsymmetrical Binuclear Cu Complex. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.6.2037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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73
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Park HJ, Kwon JH, Wang W, Lee HG, Kim C, Kim YM, Cho TS. Oxidative DNA Cleavage by Zn(X-BDPA)(NO 3) 2Complexes (X=F, H, and Me): Effect of Different Ligand Substituents. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.6.1819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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74
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Arora H, Barman SK, Lloret F, Mukherjee R. Isostructural Dinuclear Phenoxo-/Acetato-Bridged Manganese(II), Cobalt(II), and Zinc(II) Complexes with Labile Sites: Kinetics of Transesterification of 2-Hydroxypropyl-p-nitrophenylphosphate. Inorg Chem 2012; 51:5539-53. [DOI: 10.1021/ic201971t] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Himanshu Arora
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, India
| | - Suman K. Barman
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, India
| | - Francesc Lloret
- Departament de Quı́mica Inorgànica/Instituto de
Ciencia Molecular (ICMOL), Universitat de València, Polígono de la Coma, s/n, 46980-Paterna
(València), Spain
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75
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Baldini L, Cacciapaglia R, Casnati A, Mandolini L, Salvio R, Sansone F, Ungaro R. Upper rim guanidinocalix[4]arenes as artificial phosphodiesterases. J Org Chem 2012; 77:3381-9. [PMID: 22364173 DOI: 10.1021/jo300193y] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Calix[4]arene derivatives, blocked in the cone conformation and functionalized with two to four guanidinium units at the upper rim were synthesized and investigated as catalysts in the cleavage of the RNA model compound 2-hydroxypropyl p-nitrophenyl phosphate. When compared with the behavior of a monofunctional model compound, the catalytic superiority of the calix[4]arene derivatives points to a high level of cooperation between catalytic groups. Combination of acidity measurements with the pH dependence of catalytic rates unequivocally shows that a necessary requisite for effective catalysis is the simultaneous presence, on the same molecular framework, of a neutral guanidine acting as a general base and a protonated guanidine acting as an electrophilic activator. The additional guanidinium (guanidine) group in the diprotonated (monoprotonated) trifunctional calix[4]arene acts as a more or less innocent spectator. This is not the case with the tetrasubstituted calix[4]arene, whose mono-, di-, and triprotonated forms are slightly less effective than the corresponding di- and triguanidinocalix[4]arene derivatives, most likely on account of a steric interference with HPNP caused by overcrowding.
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Affiliation(s)
- Laura Baldini
- Dipartimento di Chimica Organica e Industriale, Università degli Studi di Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy
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76
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Density functional investigations on alkali metal (Li, Na, K) catalyzed thymidylyl (3′–5′) thymidine phosphodiester hydrolysis. COMPUT THEOR CHEM 2012. [DOI: 10.1016/j.comptc.2012.01.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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77
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Patel S, Rana J, Roy J, Huang H. Cleavage of pyrene-stabilized RNA bulge loops by trans-(±)-cyclohexane-1,2-diamine. Chem Cent J 2012; 6:3. [PMID: 22244351 PMCID: PMC3319420 DOI: 10.1186/1752-153x-6-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2011] [Accepted: 01/13/2012] [Indexed: 11/10/2022] Open
Abstract
Chemical agents that cleave HIV genome can be potentially used for anti-HIV therapy. In this report, the cleavage of the upper stem-loop region of HIV-1 TAR RNA was studied in a variety of buffers containing organic catalysts. trans-(±)-Cyclohexane-1,2-diamine was found to cleave the RNA with the highest activity (31%, 37°C, 18 h). Cleavage of the RNA in trans-(±)-cyclohexane-1,2-diamine buffer was also studied when the RNA was hybridized with complementary DNAs. A pyrene-modified C3 spacer was incorporated to the DNA strand to facilitate the formation of a RNA bulge loop in the RNA/DNA duplex. In contrast, unmodified DNAs cannot efficiently generate RNA bulge loops, regardless of the DNA sequences. The results showed that the pyrene-stablized RNA bulge loops were efficiently and site-specifically cleaved by trans-(±)-cyclohexane-1,2-diamine.
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Affiliation(s)
- Sejal Patel
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, 323 Martin L, King Blvd, Newark, NJ, 07102, USA.
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78
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Wei L, Shao Y, Zhou M, Hu HW, Lu GY. Synthesis and enhanced DNA cleavage activities of bis-tacnorthoamide derivatives. Org Biomol Chem 2012; 10:8484-92. [DOI: 10.1039/c2ob25743b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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79
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Tjioe L, Joshi T, Forsyth CM, Moubaraki B, Murray KS, Brugger J, Graham B, Spiccia L. Phosphodiester Cleavage Properties of Copper(II) Complexes of 1,4,7-Triazacyclononane Ligands Bearing Single Alkyl Guanidine Pendants. Inorg Chem 2011; 51:939-53. [DOI: 10.1021/ic2019814] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Linda Tjioe
- School of Chemistry, Monash University, Vic 3800, Australia
| | - Tanmaya Joshi
- School of Chemistry, Monash University, Vic 3800, Australia
| | | | | | | | - Joël Brugger
- School of Earth and Environmental
Sciences, Centre of Tectonics, Resources and Exploration (TRaX), The University of Adelaide, North Terrace, SA 5005,
Australia
- Department of Mineralogy, South Australian Museum, Adelaide, SA 5000, Australia
| | - Bim Graham
- Medicinal Chemistry and Drug
Action, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Vic 3052, Australia
| | - Leone Spiccia
- School of Chemistry, Monash University, Vic 3800, Australia
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80
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Korhonen H, Mikkola S, Williams NH. The mechanism of cleavage and isomerisation of RNA promoted by an efficient dinuclear Zn2+ complex. Chemistry 2011; 18:659-70. [PMID: 22162262 DOI: 10.1002/chem.201100721] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Indexed: 11/11/2022]
Abstract
The cleavage and isomerisation of uridine 3'-alkylphosphates was studied in the presence of a dinuclear Zn(2+) complex, 3. The rate acceleration of the cleavage by 1 mM 3 is approximately 10(6)-fold under neutral conditions. Most remarkably, the complex also promotes the isomerisation of phosphodiester bonds, although the rate-enhancement is more modest: under neutral conditions complex 3 (1 mM) catalyses isomerisation by about 500-fold. The observation of this reaction shows that the reactions of these substrates catalysed by 3 proceed through a stepwise mechanism involving an intermediate phosphorane. A β(lg) value of -0.92 was determined for the 3-promoted cleavage reaction, and modest kinetic solvent deuterium isotope effects ranging from 1.5 to 2.8 were observed. Isomerisation was less sensitive to the nature of the esterifying group, with a β value of -0.5, and the kinetic solvent deuterium isotope effects were less than 1.5. Most of these characteristics of the 3-promoted cleavage are very similar to those for the cleavage of nucleoside 3'-phosphotriesters. These data are explained by a mechanism in which the complex primarily acts as an electrophilic catalyst neutralising the charge on the phosphate and stabilising an intermediate phosphorane, with general acid catalysis promoting the cleavage reaction. In contrast to the behaviour of triesters, isomerisation is significantly slower than cleavage; this suggests that the changes in geometry that occur during isomerisation lead to a much less stable complex between 3 and the phosphorane intermediate.
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Affiliation(s)
- Heidi Korhonen
- Department of Chemistry, 20014 University of Turku, Turku, Finland
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81
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Qian J, Wang LP, Tian JL, Xie CZ, Yan SP. A copper(II) complex of 1,4,7-triazacyclononane featuring acetate pendant: an efficient DNA cleavage agent. J COORD CHEM 2011. [DOI: 10.1080/00958972.2011.642798] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Jing Qian
- a College of Chemistry, Tianjin Normal University , Tianjin 300387 , P.R. China
| | - Li-Ping Wang
- b Department of Chemistry , Baoding College , Baoding 071000 , P.R. China
| | - Jin-Lei Tian
- c Department of Chemistry , Nankai University , Tianjin 300071 , P.R. China
| | - Cheng-Zhi Xie
- d College of Pharmacy, Tianjin Medical University , Tianjin 300070 , P.R. China
| | - Shi-Ping Yan
- c Department of Chemistry , Nankai University , Tianjin 300071 , P.R. China
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82
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Milton S, Ander C, Yeheskiely E, Strömberg R. Stability of a 2′-O-(Carbamoylmethyl)adenosine-Containing Dinucleotide. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101264] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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83
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Absillis G, Van Deun R, Parac-Vogt TN. Polyoxomolybdate Promoted Hydrolysis of a DNA-Model Phosphoester Studied by NMR and EXAFS Spectroscopy. Inorg Chem 2011; 50:11552-60. [DOI: 10.1021/ic201498u] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Gregory Absillis
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Rik Van Deun
- Inorganic and Physical Chemistry Department, Universiteit Gent, Krijgslaan 281, Building S3, B-9000 Gent, Belgium
| | - Tatjana N. Parac-Vogt
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
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84
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85
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Salvio R, Cacciapaglia R, Mandolini L. General base-guanidinium cooperation in bifunctional artificial phosphodiesterases. J Org Chem 2011; 76:5438-43. [PMID: 21612212 DOI: 10.1021/jo2004007] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Artificial phosphodiesterases that combine a guanidinium unit with a general base connected by a m-xylylene linker catalyze the transesterification of the RNA model compound 2-hydroxypropyl p-nitrophenyl phosphate (HPNP). The bifunctional catalysts presented in this work show varying extents of cooperation between catalytic units and a rate enhancement of 4 × 10(4) in the most favorable case.
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Affiliation(s)
- Riccardo Salvio
- Dipartimento di Chimica and IMC-CNR Sezione Meccanismi di Reazione, Università La Sapienza, P.le Aldo Moro 5, 00185 Roma, Italy
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86
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Kozłowski M, Radecka-Paryzek W, Kubicki M. N-[2-(Acetamido)ethyl]-2-hydroxybenzamide. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o559. [PMID: 21522324 PMCID: PMC3051945 DOI: 10.1107/s1600536811003680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2011] [Accepted: 01/28/2011] [Indexed: 11/10/2022]
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87
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Ramakrishnan S, Suresh E, Riyasdeen A, Akbarsha MA, Palaniandavar M. DNA binding, prominent DNA cleavage and efficient anticancer activities of tris(diimine)iron(II) complexes. Dalton Trans 2011; 40:3524-36. [PMID: 21369607 DOI: 10.1039/c0dt00466a] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The complexes rac-[Fe(diimine)(3)](ClO(4))(2)1-4, where diimine = 2,2'-bipyridine (bpy) 1, 1,10-phenanthroline (phen) 2, 5,6-dimethyl-1,10-phenanthroline (5,6-dmp) 3 and dipyrido[3,2-d:2',3'-f]quinoxaline (dpq) 4, have been isolated, characterized and their interaction with calf thymus DNA studied by using a host of physical methods. The X-ray crystal structure of rac-[Fe(5,6-dmp)(3)](ClO(4))(2)3 has been determined and the packing diagram shows the presence of two enantiomeric forms of the complex cations in the same unit cell. The structures of 1-4 in solution have also been studied using UV-Visible, Cyclic Voltammetry and ESI-MS data and all data available suggests that they retain their solid state structures even in solution. The absorption spectral titrations of the iron(ii) complexes with CT DNA reveal that the DNA binding affinities of the complexes vary in the order, 4 (K(b): 9.0 × 10(3)) > 2 (6.8 × 10(3)) > 3 (4. 8 × 10(3)) > 1 (2.9 × 10(3) M(-1)). The DNA interaction of dpq complex (4) involves partial insertion of the extended phen ring in between the DNA base pairs, which is deeper than that of phen (2). The 5,6-dmp (3) complex is involved in groove binding in the major groove of DNA. The lower DNA binding affinity of 1 is due to electrostatic interaction of the cationic complexes with exterior phosphates of DNA. The EthBr displacement assay and DNA viscosity study support these DNA binding modes and the above trend in DNA binding affinities. The complexes of 1 and 2 show induced CD (ICD) upon interaction with CT DNA while 3 and 4 bound to DNA exhibit inversion in the positive band with the helicity band showing very small changes, which implies that 3 and 4 bind enantiopreferentially to DNA. The DNA cleavage abilities of 1-4 have been observed at 10 μM concentration of complexes in the presence of 100 μM H(2)O(2) and the DNA cleavage efficiency (> 90%) follows the order 3 > 1 > 2 > 4. The anticancer activity of 1-4 against human breast cancer cell line (MCF-7) has also been studied. The IC(50) values of the complexes at different incubation time intervals of 24 and 48 h follow the order, 3 (0.8, 0.6) < 4 (20.0, 17.0) < 2 (28.0, 22.0) < 1 (32.0, 29.0 μM). Interestingly, 3 exhibits anticancer activity more potent than 1, 2 and 4 and cisplatin for both 24 and 48 h. It induces cell death both through apoptosis and necrosis mechanisms, as revealed by morphological assessment data obtained by using AO/EB and Hoechst 33258 fluorescence staining methods.
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Affiliation(s)
- Sethu Ramakrishnan
- Center for Bioinorganic Chemistry, School of Chemistry, Bharathidasan University, Tiruchirappalli, 620 024, Tamilnadu, India
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88
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Reddy PR, Shilpa A. Oxidative and hydrolytic DNA cleavage by Cu(II) complexes of salicylidene tyrosine schiff base and 1,10 phenanthroline/bipyridine. Polyhedron 2011. [DOI: 10.1016/j.poly.2010.11.015] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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89
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Gao H, Ke Z, DeYonker NJ, Wang J, Xu H, Mao ZW, Phillips DL, Zhao C. Dinuclear Zn(II) Complex Catalyzed Phosphodiester Cleavage Proceeds via a Concerted Mechanism: A Density Functional Theory Study. J Am Chem Soc 2011; 133:2904-15. [DOI: 10.1021/ja106456u] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Hui Gao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry/KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Zhuofeng Ke
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry/KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Nathan J. DeYonker
- Department of Chemistry, The University of Memphis, Memphis, Tennessee 38152-3550, United States
| | - Juping Wang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry/KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Huiying Xu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry/KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Zong-Wan Mao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry/KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - David Lee Phillips
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
| | - Cunyuan Zhao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry/KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China
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90
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Lönnberg H. Cleavage of RNA phosphodiester bonds by small molecular entities: a mechanistic insight. Org Biomol Chem 2011; 9:1687-703. [PMID: 21258754 DOI: 10.1039/c0ob00486c] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
RNA molecules participate in many fundamental cellular processes either as a carrier of genetic information or as a catalyst, and hence, RNA has received increasing interest both as a chemotherapeutic agent and as a target of chemotherapy. In addition the dual nature of RNA has led to the RNA-world concept, i.e. an assumption that the evolution at an early stage of life was based on RNA-like oligomers that were responsible for the storage and transfer of information and as catalysts maintained primitive metabolism. Accordingly, the kinetics and mechanisms of the cleavage of RNA phosphodiester bonds have received interest and it is hoped they will shed light on the mechanisms of enzyme action and on the development of artificial enzymes. The major mechanistic findings concerning the cleavage by small molecules and ions and their significance for the development of efficient and biologically applicable artificial catalysts for RNA hydrolysis are surveyed in the present perspective.
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Affiliation(s)
- Harri Lönnberg
- Department of Chemistry, University of Turku, FIN-20014 Turku, Finland.
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91
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Wang L, Ye Y, Lykourinou V, Angerhofer A, Ming LJ, Zhao Y. Metal Complexes of a Multidentate Cyclophosphazene with Imidazole-Containing Side Chains for Hydrolyses of Phosphoesters - Bimolecular vs. Intramolecular Dinuclear Pathway. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201000668] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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92
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Ramakrishnan S, Suresh E, Riyasdeen A, Akbarsha MA, Palaniandavar M. Interaction of rac-[M(diimine)3]2+ (M = Co, Ni) complexes with CT DNA: role of 5,6-dmp ligand on DNA binding and cleavage and cytotoxicity. Dalton Trans 2011; 40:3245-56. [DOI: 10.1039/c0dt01360a] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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93
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Tjioe L, Joshi T, Brugger J, Graham B, Spiccia L. Synthesis, Structure, and DNA Cleavage Properties of Copper(II) Complexes of 1,4,7-Triazacyclononane Ligands Featuring Pairs of Guanidine Pendants. Inorg Chem 2010; 50:621-35. [DOI: 10.1021/ic1018136] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Linda Tjioe
- School of Chemistry, Monash University, Vic 3800, Australia
| | - Tanmaya Joshi
- School of Chemistry, Monash University, Vic 3800, Australia
| | - Joël Brugger
- School of Earth & Environmental Science, University of Adelaide, Adelaide, SA 5005 Australia
- South Australian Museum, Adelaide, SA 5000, Australia
| | - Bim Graham
- Medicinal Chemistry and Drug Action, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Vic 3052, Australia
| | - Leone Spiccia
- School of Chemistry, Monash University, Vic 3800, Australia
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94
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Liang X, Zou X, Tan L, Zhu W. Study on nucleic acid (CT-DNA and yeast tRNA) binding behaviors and cytotoxic properties of a heterodinuclear Ru(II)-Co(III) polypyridyl complex. J Inorg Biochem 2010; 104:1259-66. [PMID: 20837360 PMCID: PMC7126775 DOI: 10.1016/j.jinorgbio.2010.08.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2010] [Revised: 08/04/2010] [Accepted: 08/09/2010] [Indexed: 11/13/2022]
Abstract
A heterodinuclear (Ru(II), Co(III)) metal polypyridyl complex [(phen)(2)Ru(bpibH(2))Co(phen)(2)](5+) {phen = 1,10-phenanthroline, bpibH(2) = 1,4-bis([1,10]phebanthroline-[5,6-d]imidazol-2-yl)-benzene} has been designed and synthesized. The comparative study on the interactions of the Ru(II)-Co(III) complex with calf thymus DNA (CT-DNA) and yeast tRNA has been investigated by UV-visible spectroscopy, fluorescence spectroscopy, viscosity, as well as equilibrium dialysis and circular dichroism (CD). The antitumor activities of the complex have been evaluated by MTT {3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide} method and Giemsa staining experiment. These results indicate that the structures of nucleic acids have significant effects on the binding behaviors of metal complexes. Furthermore, the complex demonstrates different antitumor activity against selected tumor cell lines in vitro, and can make the cell apoptosis.
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Affiliation(s)
- Xiling Liang
- College of Chemistry, Xiangtan University, Xiangtan 411105, PR China
| | - Xiaoqing Zou
- College of Chemistry, Xiangtan University, Xiangtan 411105, PR China
| | - Lifeng Tan
- College of Chemistry, Xiangtan University, Xiangtan 411105, PR China
- Key Lab of Environment-friendly Chemistry and Application in Ministry of Education, Xiangtan University, Xiangtan 411105, PR China
| | - Weiguo Zhu
- College of Chemistry, Xiangtan University, Xiangtan 411105, PR China
- Key Lab of Environment-friendly Chemistry and Application in Ministry of Education, Xiangtan University, Xiangtan 411105, PR China
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95
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Cao R, Müller P, Lippard SJ. Tripodal tris-tacn and tris-dpa platforms for assembling phosphate-templated trimetallic centers. J Am Chem Soc 2010; 132:17366-9. [PMID: 21090678 DOI: 10.1021/ja108212v] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Multidentate tripodal ligands, N(CH2-m-C6H4-CH2tacn)3 (L1) and N(CH2-o-C6H4-CH2N(CH2py)2)3 (L2), have been devised for assembling high-nuclearity metal clusters. By using the same tripodal platform with different ligand appendages, either triazacyclononanes or dipicolylamines, and functionalizing either the ortho or the meta positions on the tris(xylyl) linker arms, discrete trimetal phosphate units of relevance to phosphate-metabolizing trimetallic centers in biology were prepared. Four such compounds, [(Cu(II)Cl)3(HPO4)L1](PF6) (1), [(Cu(II)Cl)3(HAsO4)L1](PF6) (2), Na2[Mn(III)6Mn(II)2(H2O)2(HPO4)6(PO4)4(L1)2] (3), and [Co(II)3(H2PO4)Cl2(MeCN)L2](PF6)3 (4), all containing three metal centers bound to a central phosphate or arsenate unit bridging oxygen atoms, have been synthesized and structurally characterized. These results demonstrate the propensity of this novel tripodal ligand platform, in the presence of phosphate or arsenate, to assemble {M3(EO4)} units and thus structurally mimic trimetallic active sites of proteins involved in phosphate metabolism. Reactivity studies reveal that the tricopper complex 1 is more efficient than monocopper analogues in catalyzing the hydrolysis of 4-nitrophenyl phosphate.
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Affiliation(s)
- Rui Cao
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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96
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Mohamed MF, Brown RS. Cleavage of an RNA Model Catalyzed by Dinuclear Zn(II) Complexes Containing Rate-Accelerating Pendants. Comparison of the Catalytic Benefits of H-Bonding and Hydrophobic Substituents. J Org Chem 2010; 75:8471-7. [DOI: 10.1021/jo1017316] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Mark F. Mohamed
- Department of Chemistry, Queen’s University, Kingston, Ontario, Canada K7L 3N6
| | - R. Stan Brown
- Department of Chemistry, Queen’s University, Kingston, Ontario, Canada K7L 3N6
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97
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Ibrahim MM, Mersal GA. Zinc(II) tweezers containing artificial peptides mimicking the active site of phosphotriesterase: The catalyzed hydrolysis of the toxic organophosphate parathion. J Inorg Biochem 2010; 104:1195-204. [DOI: 10.1016/j.jinorgbio.2010.07.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2010] [Revised: 07/14/2010] [Accepted: 07/15/2010] [Indexed: 10/19/2022]
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98
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Wiester MJ, Ulmann PA, Mirkin CA. Enzymnachbildungen auf der Basis supramolekularer Koordinationschemie. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201000380] [Citation(s) in RCA: 186] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Michael J. Wiester
- Department of Chemistry and the International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208‐3113 (USA), Fax: (+1) 847‐467‐5123
| | - Pirmin A. Ulmann
- Department of Chemistry and the International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208‐3113 (USA), Fax: (+1) 847‐467‐5123
| | - Chad A. Mirkin
- Department of Chemistry and the International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208‐3113 (USA), Fax: (+1) 847‐467‐5123
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99
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Wiester MJ, Ulmann PA, Mirkin CA. Enzyme Mimics Based Upon Supramolecular Coordination Chemistry. Angew Chem Int Ed Engl 2010; 50:114-37. [DOI: 10.1002/anie.201000380] [Citation(s) in RCA: 628] [Impact Index Per Article: 44.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Michael J. Wiester
- Department of Chemistry and the International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208‐3113 (USA), Fax: (+1) 847‐467‐5123
| | - Pirmin A. Ulmann
- Department of Chemistry and the International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208‐3113 (USA), Fax: (+1) 847‐467‐5123
| | - Chad A. Mirkin
- Department of Chemistry and the International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208‐3113 (USA), Fax: (+1) 847‐467‐5123
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100
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Arjmand F, Muddassir M. Design and synthesis of heterobimetallic topoisomerase I and II inhibitor complexes: in vitro DNA binding, interaction with 5'-GMP and 5'-TMP and cleavage studies. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2010; 101:37-46. [PMID: 20638859 DOI: 10.1016/j.jphotobiol.2010.06.009] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2010] [Revised: 06/11/2010] [Accepted: 06/21/2010] [Indexed: 10/19/2022]
Abstract
New potential cancer chemotherapeutic complexes Cu-Sn(2)/Zn-Sn(2) 3 and 4 were designed and prepared as topoisomerases inhibitors; their in vitro DNA binding studies were carried out which reveal strong electrostatic binding via phosphate backbone of DNA helix, in addition to other binding modes viz. coordinate covalent and partial intercalation. To throw insight to molecular binding event at the target site, UV-vis titrations of 3 and 4 with mononucleotides of interest, viz, 5'-GMP and 5'-TMP were carried out, (in case of 4) by (1)H and (31)P NMR. Cleavage studies employing gel electrophoresis demonstrate both the complexes 3 and 4 are efficient cleavage agents and are specific groove binders (complex 3 binds to both major and minor groove while complex 4 is specifically minor groove binder only). In addition, the complexes show high inhibition activity against topoisomerase I and II. However, complex 4 exhibits significant inhibitory effects on the Topo I activity at a very low concentration approximately 2.5 microM.
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Affiliation(s)
- Farukh Arjmand
- Department of Chemistry, Aligarh Muslim University, Aligarh 202 002, India.
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