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The exocyclic amino group of adenine in Pt II and Pd II complexes: a critical comparison of the X-ray crystallographic structural data and gas phase calculations. J Biol Inorg Chem 2017; 22:567-579. [PMID: 28315011 DOI: 10.1007/s00775-017-1448-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 02/28/2017] [Indexed: 12/30/2022]
Abstract
A detailed computational (DFT level of theory) study regarding the nature of the exocyclic amino group, N6H2, of the model nucleobase 9-methyladenine (9MeA) and its protonated (9MeAH+) and deprotonated forms (9MeA-H), free and metal-complexed, has been conducted. The metals are PtII and PdII, bonded to nitrogen-containing co-ligands (NH3, dien, bpy), with N1, N6, and N7 being the metal-binding sites, individually or in different combinations. The results obtained from gas phase calculations are critically compared with X-ray crystallography data, whenever possible. In the majority of cases, there is good qualitative agreement between calculated and experimentally determined C6-N6 bond lengths, but calculated values always show a trend to larger values, by 0.02-0.08 Å. Both methods indicate, with few exceptions, a high degree of double-bond character of C6-N6, consistent with an essentially sp2-hybridized N6 atom. The shortest values for C6-N6 distances in X-ray crystal structures are around 1.30 Å. Exceptions refer to cases in which DFT calculations suggest the existence of a hydrogen bond with N6H2 acting as a H bond acceptor, hence a situation with N6 having undergone a substantial hybridization shift toward sp3. Nevertheless, even in these cases the C6-N6 bond (1.392 Å) is still halfway between a typical C-N single bond (1.48 Å) and a typical C=N double bond (1.28 Å). This scenario is, however, not borne out by X-ray crystallographic results, and is attributed to the absence of counter anions and solvent molecules in the calculated structures.
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Ghorbanloo M, Jafari S, Bikas R, Krawczyk MS, Lis T. Dioxidovanadium(V) complexes containing thiazol-hydrazone NNN-donor ligands and their catalytic activity in the oxidation of olefins. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2016.10.005] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lüth MS, Freisinger E, Kampf G, Garijo Anorbe M, Griesser R, Operschall BP, Sigel H, Lippert B. Connectivity patterns and rotamer states of nucleobases determine acid-base properties of metalated purine quartets. J Inorg Biochem 2015; 148:93-104. [PMID: 25773716 DOI: 10.1016/j.jinorgbio.2015.02.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 02/04/2015] [Accepted: 02/05/2015] [Indexed: 10/24/2022]
Abstract
Potentiometric pH titrations and pD dependent (1)H NMR spectroscopy have been applied to study the acidification of the exocyclic amino group of adenine (A) model nucleobases (N9 position blocked by alkyl groups) when carrying trans-a2Pt(II) (with a=NH3 or CH3NH2) entities both at N1 and N7 positions. As demonstrated, in trinuclear complexes containing central A-Pt-A units, it depends on the connectivity pattern of the adenine bases (N7/N7 or N1/N1) and their rotamer states (head-head or head-tail), how large the acidifying effect is. Specifically, a series of trinuclear complexes with (A-N7)-Pt-(N7-A) and (A-N1)-Pt-(N1-A) cross-linking patterns and terminal 9-alkylguanine ligands (9MeGH, 9EtGH) have been analyzed in this respect, and it is shown that, for example, the 9MeA ligands in trans-,trans-,trans-[Pt(NH3)2(N7-9MeA-N1)2{Pt(NH3)2(9EtGH-N7)}2](ClO4)6·6H2O (4a) and trans-,trans-,trans-[Pt(NH3)2(N7-9EtA-N1)2{Pt(CH3NH2)2(9-MeGH-N7)}2](ClO4)6·3H2O (4b) are more acidic, by ca. 1.3 units (first pKa), than the linkage isomer trans-,trans-,trans-[Pt(CH3NH2)2(N1-9MeA-N7)2{Pt(NH3)2(9MeGH-N7)}2](NO3)6·6.25H2O (1b). Overall, acidifications in these types of complexes amount to 7-9 units, bringing the pKa values of such adenine ligands in the best case close to the physiological pH range. Comparison with pKa values of related trinuclear Pt(II) complexes having different co-ligands at the Pt ions, confirms this picture and supports our earlier proposal that the close proximity of the exocyclic amino groups in a head-head arrangement of (A-N7)-Pt-(N7-A), and the stabilization of the resulting N6H(-)⋯H2N6 unit, is key to this difference.
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Affiliation(s)
- Marc Sven Lüth
- Fakultät Chemie und Chemische Biologie (CCB), Technische Universität, Dortmund 44221 Dortmund, Germany; Department of Chemistry, Inorganic Chemistry, University of Basel, Spitalstrasse 51, 4056 Basel, Switzerland
| | - Eva Freisinger
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland.
| | - Gunnar Kampf
- Fakultät Chemie und Chemische Biologie (CCB), Technische Universität, Dortmund 44221 Dortmund, Germany; Department of Chemistry, Inorganic Chemistry, University of Basel, Spitalstrasse 51, 4056 Basel, Switzerland
| | - Marta Garijo Anorbe
- Fakultät Chemie und Chemische Biologie (CCB), Technische Universität, Dortmund 44221 Dortmund, Germany
| | - Rolf Griesser
- Department of Chemistry, Inorganic Chemistry, University of Basel, Spitalstrasse 51, 4056 Basel, Switzerland
| | - Bert P Operschall
- Department of Chemistry, Inorganic Chemistry, University of Basel, Spitalstrasse 51, 4056 Basel, Switzerland
| | - Helmut Sigel
- Department of Chemistry, Inorganic Chemistry, University of Basel, Spitalstrasse 51, 4056 Basel, Switzerland.
| | - Bernhard Lippert
- Fakultät Chemie und Chemische Biologie (CCB), Technische Universität, Dortmund 44221 Dortmund, Germany.
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Patel DK, Domínguez-Martín A, Brandi-Blanco MDP, Choquesillo-Lazarte D, Nurchi VM, Niclós-Gutiérrez J. Metal ion binding modes of hypoxanthine and xanthine versus the versatile behaviour of adenine. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2011.05.014] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Patel DK, Choquesillo-Lazarte D, Domínguez-Martín A, Brandi-Blanco MP, González-Pérez JM, Castiñeiras A, Niclós-Gutiérrez J. Chelating Ligand Conformation Driving the Hypoxanthine Metal Binding Patterns. Inorg Chem 2011; 50:10549-51. [DOI: 10.1021/ic201918y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Dheerendra K. Patel
- Department of Inorganic Chemistry, Faculty of Pharmacy, University of Granada, 18071 Granada, Spain
| | - Duane Choquesillo-Lazarte
- Laboratorio de Estudios Cristalográgficos, IACT, CSIC-Universidad de Granada, Avenida de las Palmeras 4, 18100 Armilla, Granada, Spain
| | - Alicia Domínguez-Martín
- Department of Inorganic Chemistry, Faculty of Pharmacy, University of Granada, 18071 Granada, Spain
| | - M. Pilar Brandi-Blanco
- Department of Inorganic Chemistry, Faculty of Pharmacy, University of Granada, 18071 Granada, Spain
| | | | - Alfonso Castiñeiras
- Department of Inorganic Chemistry, Faculty of Pharmacy, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Juan Niclós-Gutiérrez
- Department of Inorganic Chemistry, Faculty of Pharmacy, University of Granada, 18071 Granada, Spain
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Zhang XH, Hao ZM, Zhang XM. Spin Canting and Metamagnetism in the First Hybrid Cobalt-Hypoxanthine Open Framework with umr Topology. Chemistry 2011; 17:5588-94. [DOI: 10.1002/chem.201003199] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2010] [Indexed: 11/10/2022]
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Lopes LMF, Garcia AR, Brogueira P, Ilharco LM. Interactions between DNA Purines and Ruthenium Ammine Complexes within Nanostructured Sol−Gel Silica Matrixes. J Phys Chem B 2010; 114:3987-98. [DOI: 10.1021/jp9080542] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Luís M. F. Lopes
- CQFM - Centro de Química-Física Molecular and IN - Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Universidade Técnica de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal, Departamento de Química e Farmácia, FCT, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal, and Departamento de Física and ICEMS, Instituto Superior Técnico, Universidade Técnica de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
| | - Ana R. Garcia
- CQFM - Centro de Química-Física Molecular and IN - Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Universidade Técnica de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal, Departamento de Química e Farmácia, FCT, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal, and Departamento de Física and ICEMS, Instituto Superior Técnico, Universidade Técnica de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
| | - Pedro Brogueira
- CQFM - Centro de Química-Física Molecular and IN - Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Universidade Técnica de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal, Departamento de Química e Farmácia, FCT, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal, and Departamento de Física and ICEMS, Instituto Superior Técnico, Universidade Técnica de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
| | - Laura M. Ilharco
- CQFM - Centro de Química-Física Molecular and IN - Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Universidade Técnica de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal, Departamento de Química e Farmácia, FCT, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal, and Departamento de Física and ICEMS, Instituto Superior Técnico, Universidade Técnica de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
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Yang EC, Liu ZY, Liu ZY, Zhao LN, Zhao XJ. Long-range ferromagnetic ordering in a 3D CuII-tetracarboxylate framework assisted by an unprecedented bidentate μ2-O1,N4 hypoxanthine nucleobase. Dalton Trans 2010; 39:8868-71. [PMID: 20820623 DOI: 10.1039/c0dt00717j] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- En-Cui Yang
- College of Chemistry, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Tianjin Normal University, Tianjin, 300387, PR China
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Gupta D, Nowak R, Lippert B. Pt(ii) complexes of unsubstituted guanine and 7-methylguanine. Dalton Trans 2010:73-84. [DOI: 10.1039/b912701a] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Mikulski CM, Bayne ML, Grossman S, Gaul M, Renn A, Staley DL, Karayannis NM. Ferric Chloride and Bromide Complexes with Xanthine and Hypoxanthine. J COORD CHEM 2009. [DOI: 10.1080/00958978909408865] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Chester M. Mikulski
- a Department of Chemistry and Physics , Beaver College , Glenside, PA, 19038, USA
| | - Monica L. Bayne
- a Department of Chemistry and Physics , Beaver College , Glenside, PA, 19038, USA
| | - Scott Grossman
- a Department of Chemistry and Physics , Beaver College , Glenside, PA, 19038, USA
| | - Michele Gaul
- a Department of Chemistry and Physics , Beaver College , Glenside, PA, 19038, USA
| | - Amy Renn
- a Department of Chemistry and Physics , Beaver College , Glenside, PA, 19038, USA
| | - Donna L. Staley
- a Department of Chemistry and Physics , Beaver College , Glenside, PA, 19038, USA
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Mikulski CM, Staley DL, Karayannis NM. Hypoxanthine and Xanthine Complexes with Some Mercury(II) and Lead(II) Halides. J COORD CHEM 2009. [DOI: 10.1080/00958979209407911] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Chester M. Mikulski
- a Department of Chemistry and Physics , Beaver College , Glenside , PA , 19038 , USA
| | - Donna L. Staley
- a Department of Chemistry and Physics , Beaver College , Glenside , PA , 19038 , USA
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12
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Lippert B, Gupta D. Promotion of rare nucleobase tautomers by metal binding. Dalton Trans 2009:4619-34. [DOI: 10.1039/b823087k] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Krogh-Jespersen K, Stibrany RT, John E, Westbrook JD, Emge TJ, Clarke MJ, Potenza JA, Schugar HJ. Solid-State Changes in Ligand-to-Metal Charge-Transfer Spectra of (NH3)5RuIII(2,4-dihydroxybenzoate) and (NH3)5RuIII(xanthine) Chromophores. Inorg Chem 2008; 47:9813-27. [DOI: 10.1021/ic800511g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Karsten Krogh-Jespersen
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903, and Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02167
| | - Robert T. Stibrany
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903, and Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02167
| | - Elizabeth John
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903, and Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02167
| | - John D. Westbrook
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903, and Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02167
| | - Thomas J. Emge
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903, and Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02167
| | - Michael J. Clarke
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903, and Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02167
| | - Joseph A. Potenza
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903, and Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02167
| | - Harvey J. Schugar
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903, and Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02167
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Lippert B. Ligand-pKaShifts through Metals: Potential Relevance to Ribozyme Chemistry. Chem Biodivers 2008; 5:1455-1474. [DOI: 10.1002/cbdv.200890135] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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15
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Aoki K, Salam MA, Munakata C, Fujisawa I. Metal ion interactions with nucleic acid bases in the tripodal tris(2-aminoethyl)amine (tren) ligand-system: Crystal structures of [Ni(tren)(adeninato)(ClO4)]·adenine, [Cu(tren)(9-ethylguanine)]·(ClO4)2, [{Ni(tren)(H2O)}2(hypoxanthinato)]·(ClO4)3·1.5H2O, [Ni(tren)(hypoxanthinato)(H2O)]·ClO4·2H2O, and [{Ni(tren)(H2O)}2(hypoxanthinato)]2·(NO3)6·4.5H2O. Inorganica Chim Acta 2007. [DOI: 10.1016/j.ica.2007.02.043] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Besker N, Coletti C, Marrone A, Re N. Binding of Antitumor Ruthenium Complexes to DNA and Proteins: A Theoretical Approach. J Phys Chem B 2007; 111:9955-64. [PMID: 17672493 DOI: 10.1021/jp072182q] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The thermodynamics of the binding of the antitumor ammine, amine, and immine complexes of ruthenium(II) and ruthenium(III) to DNA and peptides was studied computationally using model molecules. We performed density functional calculations on several monofunctional ruthenium complexes of the formula [Ru(NH3)5B]z+, where B is an adenine, guanine, or cytosine nucleobase or an 4-methylimidazole, a dimethylthioether, or a dimethylphosphate anion and z = 2 and 3. The pentammineruthenium fragment has been intensively studied and also constitutes a good model for a wide class of antitumor ammine, amine, and imine complexes of Ru(II) and Ru(III), while the considered bases/ligands have been chosen as models for the main binding sites of DNA, nucleobases, and phosphate backbone and proteins, histidyl, and sulfur-containing residue such as methionine or cysteine. Bond dissociation enthalpies and free energies have been calculated for all the considered metal binding sites both in the gas phase and in solution and allow building a binding affinity order for the considered nucleic acid or protein binding sites. The binding of guanine to some bifunctional complexes, [Ru(NH3)(4)Cl2], [cis-RuCl(2)(bpy)2], and [cis-RuCl(2)(azpy)2], has also been considered to evaluate the effect of a second labile chloro or aquo ligand and more realistic polypyridyl and arylazopyridine ligands.
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Affiliation(s)
- Neva Besker
- Dipartimento di Scienze del Farmaco, Università degli Studi G. d'Annunzio, Via Dei Vestini, 31, I-66100 Chieti, Italy
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Kalyanaraman S, Krishnakumar V, Ganesan K. Crystal growth, structural and spectroscopic analysis of hypoxanthinium chloride monohydrate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2007; 67:750-5. [PMID: 17049911 DOI: 10.1016/j.saa.2006.07.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2006] [Accepted: 07/28/2006] [Indexed: 05/12/2023]
Abstract
Protonated form of hypoxanthinium chloride monohydrate single crystal has been grown from dilute hydrochloric acid. Single crystal X-ray analysis was carried out and the titled crystal belong to the monoclinic P2(1)/c space group. Hypoxanthine is protonated at N(1) with the hypoxanthine cations, linked to chlorine anion via weak bifurcated N-H...Cl hydrogen bonds and interconnected by hydrogen bonding contacts of the type N-H...O. Infrared, Raman and UV spectroscopic tools were applied to characterize hypoxanthinium chloride monohydrate. By applying group theoretical methods the internal and external modes of vibrations of the title crystal have been identified and discussed.
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Affiliation(s)
- S Kalyanaraman
- Department of Physics, Sri Paramakalyani College, Alwarkurichi 627412, India
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Clarke MJ. Electrochemical Effects of Metal Ion Coordination to Noninnocent, Biologically Important Molecules. COMMENT INORG CHEM 2006. [DOI: 10.1080/02603598408078133] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Roitzsch M, Añorbe MG, Miguel PJS, Müller B, Lippert B. The role of intramolecular hydrogen bonding on nucleobase acidification following metal coordination: possible implications of an "indirect" role of metals in acid-base catalysis of nucleic acids. J Biol Inorg Chem 2005; 10:800-12. [PMID: 16231130 DOI: 10.1007/s00775-005-0030-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2005] [Accepted: 09/08/2005] [Indexed: 11/25/2022]
Abstract
The acidifying effect of Pt(II) on nucleobase -NH and -NH2 groups depends both on the site of metal coordination and on the efficiency of stabilization of the deprotonated nucleobase via intracomplex hydrogen bonding. Weakly acidic nucleobase protons with pK (a) values between 9 and 17 can be acidified by a single Pt(II) to have pK (a) values which are well within the physiological pH range. This could open the possibility of an acid-base catalysis occurring at pH 7, with the metal-nucleobase entity functioning either as an acid or a base. Examples of Pt(II) complexes studied here include, among others, mixed nucleobase systems of 1-methylcytosine and 1,9-dimethyladenine as well as a complex of the rare iminooxo tautomer of 1-methylcytosine having the metal bonded at N4.
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Affiliation(s)
- Michael Roitzsch
- Fachbereich Chemie, Universität Dortmund, Otto-Hahn-Strasse 6, 44221, Dortmund, Germany
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Ruthenium complexes with purine derivatives: Syntheses, structural characterization and preliminary studies with plasmidic DNA. INORG CHEM COMMUN 2005. [DOI: 10.1016/j.inoche.2005.05.023] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Turel I, Pecanac M, Golobic A, Alessio E, Serli B, Bergamo A, Sava G. Solution, solid state and biological characterization of ruthenium(III)-DMSO complexes with purine base derivatives. J Inorg Biochem 2004; 98:393-401. [PMID: 14729321 DOI: 10.1016/j.jinorgbio.2003.12.001] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Two new complexes of Ru(III) with purine base derivatives, [mer-RuCl(3)(acv)(DMSO-S)(C(2)H(5)OH)].C(2)H(5)OH (1) (acv=acyclovir, DMSO=dimethyl sulfoxide) and [trans-RuCl(4)(guaH)(DMSO-S)].2H(2)O (2) (guaH=protonated molecule of guanine), were prepared from the same Ru(III) precursor, [trans-RuCl(4)(DMSO-S)(2)](-), by substitution of one DMSO-S. Coordination of acv induced also replacement of one chloride by an ethanol molecule. This reactivity difference was explained by striking contrasts in the hydrogen bonding schemes of the two complexes, evidenced in their X-ray crystal structures. In 1 the guanine derivative acyclovir is coordinated to ruthenium through the N(7) atom, while in 2 the protonated guanine molecule is bound through the N(9) atom. Both complexes were also characterized by various physico-chemical methods in the solid state and in the solution. In vitro, the biological activity of 2 and of the previously described complexes [mer-RuCl(3)(acv)(DMSO-S)(CH(3)OH)].0.5CH(3)OH (3) and [mer-RuCl(3)(acv)(DMSO-S)(H(2)O)].H(2)O (4) on tumour cells appear to be very similar to that of NAMI-A (NAMI-A=[ImH][trans-RuCl(4)(DMSO-S)Im]). All compounds are only weakly active on tumour cell proliferation but show an interesting proadhesive effect that suggest possible activity on tumour malignancy.
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Affiliation(s)
- Iztok Turel
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Askerceva 5, 1000 Ljubljana, Slovenia.
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Salam M, Aoki K. Metal ion interactions with nucleobases in the tripodal tris(2-aminoethyl)amine (tren) ligand-system. Crystal structures of [Cu(tren)(adeninato)]·ClO4, [Ni(tren)(9-ethylguanine–0.5H)(H2O)]2·(ClO4)2.5·(ClO3)0.5 and [{Cu(tren)}2(hypoxanthinato)]·(ClO4)3. Inorganica Chim Acta 2001. [DOI: 10.1016/s0020-1693(00)00393-5] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Velders A, van der Geest B, Kooijman H, Spek A, Haasnoot J, Reedijk J. Ruthenium(III) Coordination to the Exocyclic Nitrogen of 9-Methyladenine and Stabilisation of the Rare Imine Tautomer by Intramolecular Hydrogen Bonding. Eur J Inorg Chem 2001. [DOI: 10.1002/1099-0682(200102)2001:2<369::aid-ejic369>3.0.co;2-n] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Sánchez-Delgado RA, Navarro M, Lazardi K, Atencio R, Capparelli M, Vargas F, Urbina JA, Bouillez A, Noels AF, Masi D. Toward a novel metal based chemotherapy against tropical diseases 4. Synthesis and characterization of new metal-clotrimazole complexes and evaluation of their activity against Trypanosoma cruzi. Inorganica Chim Acta 1998. [DOI: 10.1016/s0020-1693(98)00114-5] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Rodriguez-Bailey VM, LaChance-Galang KJ, Doan PE, Clarke MJ. 1H and (31)P NMR and EPR of Pentaammineruthenium(III) Complexes of Endocyclically Coordinated Nucleotides, Nucleosides, and Related Heterocyclic Bases. Autoxidation of [(Guokappa(N7))(NH(3))(5)Ru(III)] (Guo = Guanosine). Crystal Structure of [7MeGuakappa(N9)(NH(3))(5)Ru]Cl(3).3H(2)O. Inorg Chem 1997; 36:1873-1883. [PMID: 11669793 DOI: 10.1021/ic9609416] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The (1)H-NMR spectra of complexes involving the paramagnetic metal center [(NH(3))(5)Ru(III)] coordinated at ring nitrogens have been examined with pyridine, purine, nucleoside, and nucleotide ligands along with (31)P-NMR of the nucleotide complexes and EPR of representative complexes. Variations in the spectra have been investigated as a function of the coordination site and pH. Pseudocontact and contact shifts have been calculated for various protons, and an attempt has been made to correlate sugar conformations in coordinated 5'GMP, 5'IMP, Guo, and Ino with paramagnetically induced shifts. The compound [(7MeGuakappa(N9))(NH(3))(5)Ru]Cl(3).3H(2)O crystallizes in the orthorhombic space group Pna2(1) with cell parameters a = 25.375(4) Å, b = 11.803(4) Å, c = 6.958(2) Å, Z = 4, and R = 0.042. The autoxidation of [L(NH(3))(5)Ru(III)], where L = Guo, dGuo, and 1MeGuo, to the corresponding 8-oxo complexes under atmospheric oxygen is first order in the complex and [OH(-)]. For L = Guo, k = 6.6 x 10(-5) M(-1) s(-1), DeltaH = 58 kJ/mol, and DeltaS = -124 J/(mol K).
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Affiliation(s)
- V. M. Rodriguez-Bailey
- Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02167, and Department of Chemistry, Northwestern University, Evanston, Illinois 60208
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Rodriguez-Bailey VM, Clarke MJ. 1H and (31)P NMR of Pentaammineruthenium(III) Complexes of Exocyclically-Coordinated Adenine and Cytosine Ligands. Evidence for Rotamers with Distinct Acidities. Inorg Chem 1997; 36:1611-1618. [PMID: 11669751 DOI: 10.1021/ic9610142] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
1H NMR spectra of the paramagnetic complexes [L(NH(3))(5)Ru(III)], where L = derivatives of cytosine-kappa(N4) and adenine-kappa(N6), reveal rotameric isomers with distinct acid-base equilibria. (31)P NMR spectra of the 5'CMPkappa(N4) and 5'AMPkappa(N6) complexes indicate little interaction between the metal and phosphate centers. Differences between the (1)H and (31)P NMR of endo- and exocyclically-coordinated nucleosides and nucleotides are discussed and provide a means of distinguishing exocyclic from endocyclic nitrogen coordination.
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LaChance-Galang KJ, Zhao M, Clarke MJ. Disproportionation of [(py)(NH3)4RuIII] at the N7 of Guanine Nucleosides: Severing the N-Glycosidic Bond. Inorg Chem 1996. [DOI: 10.1021/ic960798g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - M. Zhao
- Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02167
| | - M. J. Clarke
- Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02167
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N7 and C8 coordinated purine complexes of [(NH3)5OsIII]. Crystal structures of 7-[9MeHyp(NH3)5Os]Cl3·H2O and 8-[1,3,7Me3Xan(NH3)5Os]Cl3·2H2O. Inorganica Chim Acta 1993. [DOI: 10.1016/s0020-1693(00)83321-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Lippert B, Schöllhorn H, Thewalt U. Metal-stabilized rare tautomers of nucleobases. 4. On the question of adenine tautomerization by a coordinated platinum(II). Inorganica Chim Acta 1992. [DOI: 10.1016/s0020-1693(00)92417-4] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Songsheng Z, Shepherd RE. η2-1,3-dimethyluracil complexes of pentaammineruthenium(II) and pentaammineosmium(II). Inorganica Chim Acta 1989. [DOI: 10.1016/s0020-1693(00)83457-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Mikulski CM, Grossman S, Bayne ML, Gaul M, Staley DL, Renn A, Karayannis NM. Xanthine and hypoxanthine complexes with cobalt(II) halides. Inorganica Chim Acta 1989. [DOI: 10.1016/s0020-1693(00)90110-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Mikulski CM, Kurlan MK, Bayne ML, Gaul M, Karayannis NM. HYPOXANTHINE COMPLEXES WITH FIRST ROW TRANSITION METAL PERCHLORATES+. J COORD CHEM 1988. [DOI: 10.1080/00958978808080970] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Biochemical effects of binding [(H2O)(NH3)5RuII]2+ to DNA and oxidation to[(NH3)5RuIII]n—DNA. Inorganica Chim Acta 1986. [DOI: 10.1016/s0020-1693(00)82080-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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42
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Clarke M, Morrissey P. Nucleoside oxidation and hydrolysis induced by a coordinated metal ion: Xanthine oxidase activity in a simple metallonucleoside complex. Inorganica Chim Acta 1983. [DOI: 10.1016/s0020-1693(00)91250-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Clarke MJ, Coffey KF, Perpall HJ, Lyon J. Analysis of metallonucleoside hydrolysis by high-pressure liquid chromatography. Anal Biochem 1982; 122:404-11. [PMID: 7114459 DOI: 10.1016/0003-2697(82)90302-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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