Biological recognition patterns implicated by the formation and stability of ternary metal ion complexes of low-molecular-weight formed with amino acid/peptides and nucleobases/nucleosides

Terrón, Àngel; Fiol, Juan J.; Garcı́a-Raso, Ángel; Barceló‐Oliver, Miquel; Moreno, Virtudes

doi:10.1016/j.ccr.2007.03.006

Cited by 82 publications

(22 citation statements)

References 118 publications

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“…S1, Supplementary data) are indicative, as previously, of the presence of two species in solution at room temperature. In this case, the proportion of the tetranuclear species is larger compared to the dinuclear one which agrees with the higher polarity of the solvent which favour stacking interactions [51]. At higher temperatures, 393 K, it can be observed the unique existence of the dinuclear species.…”

Section: Resultssupporting

confidence: 57%

Cyclic tetranuclear half-sandwich ruthenium(II) complexes with 4,7-phenanthroline and hydroxo bridges: Crystal structure, solution behaviour and binding to nucleosides

Galindo

Quirós

Romero

et al. 2008

Journal of Inorganic Biochemistry

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Section: Resultssupporting

confidence: 57%

Cyclic tetranuclear half-sandwich ruthenium(II) complexes with 4,7-phenanthroline and hydroxo bridges: Crystal structure, solution behaviour and binding to nucleosides

Galindo

Quirós

Romero

et al. 2008

Journal of Inorganic Biochemistry

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“…Numerous compounds, naturally occurring and man-made, contain the cobalt at two common oxidation states Co (II) and Co(III). There is growing interest in investigating cobalt and other transition metal complexes for their interaction with DNA [1][2][3][4][5]. This may be partly influenced by the results of extensive investigation into two areas of research, viz.…”

Section: Introductionmentioning

confidence: 99%

“…IC50 values of Co(phen)(ma)Cl (1), Co(ma) 2 (phen)(2) and starting materials on the MDA-MB-231, MCF7 and MCF10A cell lines.…”

mentioning

confidence: 99%

Synthesis, characterization and biological properties of cobalt(II) complexes of 1,10-phenanthroline and maltol

Chin

Kong

Seng

et al. 2011

Journal of Inorganic Biochemistry

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“…Nucleobase complexes with transition metals are continuously under investigation due to their applications as advanced functional materials, their biologic importance, structural diversity and use as molecular recognition models for nucleic acids [1][2][3][4][5][6]. The majority of structural information available in these systems is mainly dedicated to the adenine nucleobase [7][8][9][10][11][12][13][14][15][16] and a variety of N-alkylated derivatives as ligands [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Anion–Cation Recognition Pattern, Thermal Stability and DFT-Calculations in the Crystal Structure of H2dap[Cd(HEDTA)(H2O)] Salt (H2dap = H2(N3,N7)-2,6-Diaminopurinium Cation)

et al. 2020

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The proton transfer between equimolar amounts of [Cd(H 2 EDTA)(H 2 O)] and 2,6-diaminopurine (Hdap) yielded crystals of the out-of-sphere metal complex H 2 (N3,N7)dap [Cd(HEDTA)(H 2 O)]·H 2 O (1) that was studied by single-crystal X-ray diffraction, thermogravimetry, FT-IR spectroscopy, density functional theory (DFT) and quantum theory of "atoms-in-molecules" (QTAIM) methods. The crystal was mainly dominated by H-bonds, favored by the observed tautomer of the 2,6-diaminopurinium(1+) cation. Each chelate anion was H-bonded to three neighboring cations; two of them were also connected by a symmetry-related anti-parallel π,π-staking interaction. Our results are in clear contrast with that previously reported for H 2 (N1,N9)ade [Cu(HEDTA) (H 2 O)]·2H 2 O (EGOWIG in Cambridge Structural Database (CSD), Hade = adenine), in which H-bonds and π,π-stacking played relevant roles in the anion-cation interaction and the recognition between two pairs of ions, respectively. Factors contributing in such remarkable differences are discussed on the basis of the additional presence of the exocyclic 2-amino group in 2,6-diaminopurinium(1+) ion. Crystals 2020, 10, 304 2 of 15 reported analog of adenine, [Cu(HEDTA)(H 2 O)]·2H 2 O [5,32], was also performed. The H-bonding networks that are established at both faces of H 2 dap were also studied using DFT calculations and the relative strength of each H-bond was estimated using the QTAIM theory. The antiparallel π,π-stacking interactions that were formed between the cations were also studied, focusing on the effect of the counter-ions. Materials and Methods ReagentsH 4 EDTA acid (TCI), Hdap (Alfa Aesar) and CdCO 3 (Alfa Aesar) were used as received. CrystallographyA colorless needle crystal of H 2 dap[Cd(HEDTA)(H 2 O)]·H 2 O (1) was mounted on a glass fiber and used for data collection. Crystal data were collected at 100(2) K, using a Bruker D8 VENTURE PHOTON III-14 diffractometer. Graphite-monochromated MoK(α) radiation (λ = 0.71073 Å) was used throughout. The data were processed with APEX2 [33] and corrected for absorption using SADABS (transmissions factors: 1.000-0.962) [34]. The structure was solved by direct methods using the program SHELXS-2013 [35] and refined by full-matrix least-squares techniques against F 2 using SHELXL-2013 [35]. Positional and anisotropic atomic displacement parameters were refined for all non-hydrogen atoms. Hydrogen atoms were located in difference maps and included as fixed contributions riding on attached atoms with isotropic thermal parameters 1.2/1.5 times those of their carrier atoms. Criteria of a satisfactory complete analysis were the ratios of 'rms' shift to standard deviation less than 0.001 and no significant features in final difference maps. Atomic scattering factors were taken from the International Tables for Crystallography [36]. Molecular graphics were plotted with PLATON [37]. A summary of the crystal data, experimental details and refinement results are listed in Table 1. Crystallographic data for 1 has been deposited in the Cambridg...

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Biological recognition patterns implicated by the formation and stability of ternary metal ion complexes of low-molecular-weight formed with amino acid/peptides and nucleobases/nucleosides

Cited by 82 publications

References 118 publications

Cyclic tetranuclear half-sandwich ruthenium(II) complexes with 4,7-phenanthroline and hydroxo bridges: Crystal structure, solution behaviour and binding to nucleosides

Cyclic tetranuclear half-sandwich ruthenium(II) complexes with 4,7-phenanthroline and hydroxo bridges: Crystal structure, solution behaviour and binding to nucleosides

Synthesis, characterization and biological properties of cobalt(II) complexes of 1,10-phenanthroline and maltol

Anion–Cation Recognition Pattern, Thermal Stability and DFT-Calculations in the Crystal Structure of H2dap[Cd(HEDTA)(H2O)] Salt (H2dap = H2(N3,N7)-2,6-Diaminopurinium Cation)

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