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Song XT, Zhou Y, Liu GB, Guan HC, Yue SM. Synthesis, crystal structures and DNA-binding properties of Zn(II), Cd(II), Mn(II), Cu(II) complexes based on a thiazole derivative and carboxylic acids. J COORD CHEM 2023. [DOI: 10.1080/00958972.2023.2169880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Xiao-Tong Song
- College of Chemistry, Changchun Normal University, Changchun, P.R. China
| | - Ying Zhou
- College of Chemistry, Changchun Normal University, Changchun, P.R. China
| | - Gui-Bao Liu
- Joint Logistics College, China People’s Liberation Army National Defence University, Beijing, P.R. China
| | - Hui-Chao Guan
- College of Chemistry, Changchun Normal University, Changchun, P.R. China
| | - Shu-Mei Yue
- College of Chemistry, Changchun Normal University, Changchun, P.R. China
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2
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Huang J, Chen PX, Wettig S. Fluorescence-based techniques to assess the miscibility and physical stability of a drug–lipid complex. CAN J CHEM 2019. [DOI: 10.1139/cjc-2018-0404] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The objective of this study was to evaluate the feasibility of using fluorescence-based techniques to assess the miscibility and physical stability of a drug–lipid complex pharmaceutical dosage form under a solvent-free condition. An indomethacin–phospholipid complex (IDM–DPC) was used as model complex for this study. The miscibility of indomethacin within the phospholipid was assessed by fluorescence spectroscopy, fluorescence microscopy, and infrared spectroscopy. The miscibility limit of the complex system was determined by fluorescence to be 20%–30% drug loading content, showing good correlation with infrared spectroscopy. The physical stability of the IDM–DPC stored at 40 °C was evaluated by fluorescence microscopy. Indomethacin formulated in the lipid complex with an indomethacin loading not more than 30% remained in an amorphous state within a period of 21 days, whereas the samples with a drug loading over 30% started to crystallize earlier with increasing drug content. IDM–DPC having higher miscibilities were found to be more resistant to recrystallization under heating, thus having better physical stability. Fluorescence-based techniques showed convenience and promise in characterizing drug–lipid miscibility and predicting storage stability under a solvent-free condition.
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Affiliation(s)
- Jiahao Huang
- School of Pharmacy, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
| | - Peter X. Chen
- School of Pharmacy, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
- Department of Food Science, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada
| | - Shawn Wettig
- School of Pharmacy, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
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3
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A stable zinc(II)-mediated base pair in a parallel-stranded DNA duplex. J Inorg Biochem 2018; 186:301-306. [DOI: 10.1016/j.jinorgbio.2018.07.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 06/12/2018] [Accepted: 07/01/2018] [Indexed: 12/16/2022]
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4
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Kesama MR, Yun BK, Dugasani SR, Jung JH, Park SH. Enhancing the electrical, optical, and magnetic characteristics of DNA thin films through Mn2+ fortification. Colloids Surf B Biointerfaces 2018; 167:197-205. [DOI: 10.1016/j.colsurfb.2018.04.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2018] [Revised: 04/02/2018] [Accepted: 04/05/2018] [Indexed: 01/24/2023]
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5
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Gao EJ, Su J, Zhang S, Zhou H, Zhan Y, Qiu X, Ding YQ, Sun N, Zhu MC. Synthesis, structures, fluorescence studies and cytotoxicity of a new Manganese(II) complex. INORG NANO-MET CHEM 2017. [DOI: 10.1080/24701556.2017.1357603] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- En-Jun Gao
- The key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang, China
| | - Junqi Su
- The key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang, China
| | - Shaozhong Zhang
- The key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang, China
| | - Hao Zhou
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Food and Environmental Science and Technology, Dalian University of Technology, Panjin
| | - Yang Zhan
- The key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang, China
| | - Xue Qiu
- The key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang, China
| | - Yu-Qing Ding
- The key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang, China
| | - Na Sun
- The key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang, China
| | - Ming-Chang Zhu
- The key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang, China
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Kulkarni A, Dugasani SR. Photoelectric properties in metal ion modified DNA nanostructure. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2015; 2015:4359-4362. [PMID: 26737260 DOI: 10.1109/embc.2015.7319360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Due to specific or as designed self-assembly, DNA nanostructures gaining popularity in various nanoscale electronic applications. Herein, a novel divalent metal ion-DNA complex known as M-DNA have been investigated for its photoelectric characteristics. The increased conductivity of M-DNA thin films is attributed to the metal ion electrical and optical properties. The gate voltage effect along with illumination on the conductivity of M-DNA demonstrates that M-DNA can be used as an active element of a field-effect transistor. The Zn DNA shows maximum conductivity of 300μS/cm at 480 nm light illumination suggest that M-DNA can be utilized in nano-opto-electronics and bio-sensing applications.
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Lu S. Zn2+ blocks annealing of complementary single-stranded DNA in a sequence-selective manner. Sci Rep 2014; 4:5464. [PMID: 24965053 PMCID: PMC4071324 DOI: 10.1038/srep05464] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 06/11/2014] [Indexed: 12/19/2022] Open
Abstract
Zinc is the second most abundant trace element essential for all living organisms. In human body, 30–40% of the total zinc ion (Zn2+) is localized in the nucleus. Intranuclear free Zn2+ sparks caused by reactive oxygen species have been observed in eukaryotic cells, but question if these free Zn2+ outrages could have affected annealing of complementary single-stranded (ss) DNA, a crucial step in DNA synthesis, repair and recombination, has never been raised. Here the author reports that Zn2+ blocks annealing of complementary ssDNA in a sequence-selective manner under near-physiological conditions as demonstrated in vitro using a low-temperature EDTA-free agarose gel electrophoresis (LTEAGE) procedure. Specifically, it is shown that Zn2+ does not block annealing of repetitive DNA sequences lacking CG/GC sites that are the major components of junk DNA. It is also demonstrated that Zn2+ blocks end-joining of double-stranded (ds) DNA fragments with 3′ overhangs mimicking double-strand breaks, and prevents renaturation of long stretches (>1 kb) of denatured dsDNA, in which Zn2+-tolerant intronic DNA provides annealing protection on otherwise Zn2+-sensitive coding DNA. These findings raise a challenging hypothesis that Zn2+-ssDNA interaction might be among natural forces driving eukaryotic genomes to maintain the Zn2+-tolerant repetitive DNA for adapting to the Zn2+-rich nucleus.
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Affiliation(s)
- Shunwen Lu
- USDA-ARS, Cereal Crops Research Unit, Fargo, ND 58102, USA
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8
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Amo-Ochoa P, Castillo O, Guijarro A, Sanz Miguel PJ, Zamora F. Supramolecular architectures based on 6-purinethione complexes. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2013.09.054] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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9
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Albertí FM, Rodríguez-Santiago L, Sodupe M, Mirats A, Kaitsiotou H, Sanz Miguel PJ, Lippert B. Mixed adenine/guanine quartets with three trans-a2 Pt(II) (a=NH(3) or MeNH(2)) cross-links: linkage and rotational isomerism, base pairing, and loss of NH(3). Chemistry 2014; 20:3394-407. [PMID: 24532472 DOI: 10.1002/chem.201304686] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Indexed: 11/12/2022]
Abstract
Of the numerous ways in which two adenine and two guanines (N9 positions blocked in each) can be cross-linked by three linear metal moieties such as trans-a2 Pt(II) (with a=NH3 or MeNH2 ) to produce open metalated purine quartets with exclusive metal coordination through N1 and N7 sites, one linkage isomer was studied in detail. The isomer trans,trans,trans-[{Pt(NH3 )2 (N7-9-EtA-N1)2 }{Pt(MeNH2 )2 (N7-9-MeGH)}2 ][(ClO4 )6 ]⋅3H2 O (1) (with 9-EtA=9-ethyladenine and 9-MeGH=9-methylguanine) was crystallized from water and found to adopt a flat Z-shape in the solid state as far as the trinuclear cation is concerned. In the presence of excess 9-MeGH, a meander-like construct, trans,trans,trans-[{Pt(NH3 )2 (N7-9-EtA-N1)2 }{Pt(MeNH2 )2 (N7-9-MeGH)2 }][(ClO4 )6 ]⋅[(9-MeGH)2 ]⋅7 H2 O (2) is formed, in which the two extra 9-MeGH nucleobases are hydrogen bonded to the two terminal platinated guanine ligands of 1. Compound 1, and likewise the analogous complex 1 a (with NH3 ligands only), undergo loss of an ammonia ligand and formation of NH4 (+) when dissolved in [D6 ]DMSO. From the analogy between the behavior of 1 and 1 a it is concluded that a NH3 ligand from the central Pt atom is lost. Addition of 1-methylcytosine (1-MeC) to such a DMSO solution reveals coordination of 1-MeC to the central Pt. In an analogous manner, 9-MeGH can coordinate to the central Pt in [D6 ]DMSO. It is proposed that the proton responsible for formation of NH4 (+) is from one of the exocyclic amino groups of the two adenine bases, and furthermore, that this process is accompanied by a conformational change of the cation from Z-form to U-form. DFT calculations confirm the proposed mechanism and shed light on possible pathways of this process. Calculations show that rotational isomerism is not kinetically hindered and that it would preferably occur previous to the displacement of NH3 by DMSO. This displacement is the most energetically costly step, but it is compensated by the proton transfer to NH3 and formation of U(-H(+) ) species, which exhibits an intramolecular hydrogen bond between the deprotonated N6H(-) of one adenine and the N6H2 group of the other adenine. Finally the question is examined, how metal cross-linking patterns in closed metallacyclic quartets containing two adenine and two guanine nucleobases influence the overall shape (square, rectangle, trapezoid) and the planarity of a metalated purine quartet.
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Affiliation(s)
- Francisca M Albertí
- Fakultät Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44221 Dortmund (Germany), Fax: (+49) 231-755-3797
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10
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Nejdl L, Ruttkay-Nedecky B, Kudr J, Krizkova S, Smerkova K, Dostalova S, Vaculovicova M, Kopel P, Zehnalek J, Trnkova L, Babula P, Adam V, Kizek R. DNA interaction with zinc(II) ions. Int J Biol Macromol 2013; 64:281-7. [PMID: 24361244 DOI: 10.1016/j.ijbiomac.2013.12.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 12/07/2013] [Accepted: 12/09/2013] [Indexed: 10/25/2022]
Abstract
We focused on interactions of Zn(II) with DNA in this study. These interactions were monitored using UV/vis spectrophotometry and gel electrophoresis. Firstly, we isolated and amplified 498 bp fragment of DNA. Samples were obtained by incubation of DNA fragment with Zn(II) for 60 min at 25 °C. After incubation, the samples were dialyzed and analyzed immediately. In this way, DNA was converted into a metal bound DNA (Zn-DNA). Interaction of Zn(II) with DNA caused change in the absorption spectrum (190-350 nm) and decrease in the melting temperature (Tm) of Zn-DNA. Spectrophotometric (UV/vis) analysis showed that increasing concentrations of zinc(II) ions led to the increase in the absorbance at 200 nm and decrease in absorbance at 251 nm. Application of zinc(II) ions at 5.5 μM concentration caused decrease in Tm for app. 7.5 °C in average in comparison with control (75.5 ± 3 °C). The lowest melting temperature (60.5 ± 2.5 °C) was observed after application of zinc(II) ions at 33 μM concentration. Gel electrophoresis proved significance of Zn(II) in the renaturation of DNA. Samples of Zn-DNA (15 μM DNA+5.5-55 μM Zn(II)) caused significant changes in the renaturation of DNA in comparison with the control, untreated DNA (15 μM DNA).
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Affiliation(s)
- Lukas Nejdl
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Branislav Ruttkay-Nedecky
- Central European Institute of Technology, Brno University of Technology, Technicka 3058/10, CZ-616 00 Brno, Czech Republic
| | - Jiri Kudr
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Sona Krizkova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; Central European Institute of Technology, Brno University of Technology, Technicka 3058/10, CZ-616 00 Brno, Czech Republic
| | - Kristyna Smerkova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Simona Dostalova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; Central European Institute of Technology, Brno University of Technology, Technicka 3058/10, CZ-616 00 Brno, Czech Republic
| | - Marketa Vaculovicova
- Central European Institute of Technology, Brno University of Technology, Technicka 3058/10, CZ-616 00 Brno, Czech Republic
| | - Pavel Kopel
- Central European Institute of Technology, Brno University of Technology, Technicka 3058/10, CZ-616 00 Brno, Czech Republic
| | - Josef Zehnalek
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; Central European Institute of Technology, Brno University of Technology, Technicka 3058/10, CZ-616 00 Brno, Czech Republic
| | - Libuse Trnkova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; Central European Institute of Technology, Brno University of Technology, Technicka 3058/10, CZ-616 00 Brno, Czech Republic
| | - Petr Babula
- Central European Institute of Technology, Brno University of Technology, Technicka 3058/10, CZ-616 00 Brno, Czech Republic
| | - Vojtech Adam
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; Central European Institute of Technology, Brno University of Technology, Technicka 3058/10, CZ-616 00 Brno, Czech Republic
| | - Rene Kizek
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic; Central European Institute of Technology, Brno University of Technology, Technicka 3058/10, CZ-616 00 Brno, Czech Republic.
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Fusch G, Zangrando E, Randaccio L, Lippert B. A Unique Helicate Comprised of Four Cytosine Nucleobases and Four Metal Entities (PtII, PtII, AuIII, AuI). Implications for the Interactions of Linearly Coordinated Metal Ions with Nucleotide Duplexes. Z Anorg Allg Chem 2013. [DOI: 10.1002/zaac.201300038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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12
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Amo-Ochoa P, Alexandre SS, Hribesh S, Galindo MA, Castillo O, Gómez-García CJ, Pike AR, Soler JM, Houlton A, Zamora F, Harrington RW, Clegg W. Coordination chemistry of 6-thioguanine derivatives with cobalt: toward formation of electrical conductive one-dimensional coordination polymers. Inorg Chem 2013; 52:5290-9. [PMID: 23594219 DOI: 10.1021/ic400237h] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this work we have synthetized and characterized by X-ray diffraction five cobalt complexes with 6-thioguanine (6-ThioGH), 6-thioguanosine (6-ThioGuoH), or 2'-deoxy-6-thioguanosine (2'-d-6-ThioGuoH) ligands. In all cases, these ligands coordinate to cobalt via N7 and S6 forming a chelate ring. However, independently of reagents ratio, 6-ThioGH provided monodimensional cobalt(II) coordination polymers, in which the 6-ThioG(-) acts as bridging ligand. However, for 2'-d-6-ThioGuoH and 6-ThioGuoH, the structure directing effect of the sugar residue gives rise to mononuclear cobalt complexes which form extensive H-bond interactions to generate 3D supramolecular networks. Furthermore, with 2'-d-6-ThioGuoH the cobalt ion remains in the divalent state, whereas with 6-ThioGuoH oxidation occurs and Co(III) is found. The electrical and magnetic properties of the coordination polymers isolated have been studied and the results discussed with the aid of DFT calculations, in the context of molecular wires.
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Affiliation(s)
- Pilar Amo-Ochoa
- Departamento de Química Inorgánica, Universidad Autónoma de Madrid, 28049 Madrid, Spain
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Sorokin V, Valeev V, Usenko E, Rakovsky Y, Andrushchenko V. Specific features of Zn2+, Co2+ and Ni2+ ion binding to DNA in alkaline solutions. Int J Biol Macromol 2013; 55:137-41. [DOI: 10.1016/j.ijbiomac.2013.01.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Revised: 12/23/2012] [Accepted: 01/01/2013] [Indexed: 11/30/2022]
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Megger DA, Megger N, Müller J. Metal-mediated base pairs in nucleic acids with purine- and pyrimidine-derived nucleosides. Met Ions Life Sci 2012; 10:295-317. [PMID: 22210344 DOI: 10.1007/978-94-007-2172-2_11] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Metal-mediated base pairs are transition metal complexes formed from complementary nucleosides within nucleic acid double helices. Instead of relying on hydrogen bonds, they are stabilized by coordinative bonds. The nucleosides acting as ligands do not necessarily have to be artificial. In fact, several examples are known of naturally occurring nucleobases (e.g., thymine, cytosine) capable of forming stable metal-mediated base pairs that are highly selective towards certain metal ions. This chapter provides a comprehensive overview of metal-mediated base pairs formed from natural nucleosides or from closely related artificial nucleosides that are pyrimidine or purine derivatives. It addresses the different strategies that lead to the development of these base pairs. The article focuses on structural models for metal-mediated base pairs, their experimental characterization within a nucleic acid, and on their possible applications.
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Megger N, Welte L, Zamora F, Müller J. Metal-mediated aggregation of DNA comprising 2,2′-bipyridine nucleoside, an asymmetrically substituted chiral bidentate ligand. Dalton Trans 2011; 40:1802-7. [DOI: 10.1039/c0dt01569e] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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16
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Solution structure of a DNA double helix with consecutive metal-mediated base pairs. Nat Chem 2010; 2:229-34. [PMID: 21124482 DOI: 10.1038/nchem.512] [Citation(s) in RCA: 224] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2009] [Accepted: 12/03/2009] [Indexed: 11/08/2022]
Abstract
Metal-mediated base pairs represent a powerful tool for the site-specific functionalization of nucleic acids with metal ions. The development of applications of the metal-modified nucleic acids will depend on the availability of structural information on these double helices. We present here the NMR solution structure of a self-complementary DNA oligonucleotide with three consecutive imidazole nucleotides in its centre. In the absence of transition-metal ions, a hairpin structure is adopted with the artificial nucleotides forming the loop. In the presence of Ag(i) ions, a duplex comprising three imidazole-Ag(+)-imidazole base pairs is formed. Direct proof for the formation of metal-mediated base pairs was obtained from ¹J(¹⁵N,¹⁰⁷/¹⁰⁹Ag) couplings upon incorporation of ¹⁵N-labelled imidazole. The duplex adopts a B-type conformation with only minor deviations in the region of the artificial bases. This work represents the first structural characterization of a metal-modified nucleic acid with a continuous stretch of metal-mediated base pairs.
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Bin X, Kraatz HB. Interaction of metal ions and DNA films on gold surfaces: an electrochemical impedance study. Analyst 2009; 134:1309-13. [PMID: 19562195 DOI: 10.1039/b821670c] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electrochemical impedance spectroscopy (EIS) has been used to investigate the effects of a number of metal ions with DNA films on gold surfaces exploiting [Fe(CN)6](3-/4-) as a solution-based redox probe. Alkaline earth metal ions Mg2+, Ca2+, trivalent Al3+, La3+ and divalent transition metal ions Ni2+, Cu2+, Cd2+ and Hg2+ have been selected in this study and the results are compared with previous studies on the effects of Zn2+ on the EIS of DNA films. All experimental results were evaluated with the help of equivalent circuits which allowed the extraction of resistive and capacitive components. For all metal ions studied here, addition of the metal ions causes a decrease in the charge transfer resistance. The difference of charge transfer resistance (DeltaR(ct)) of ds-DNA films in the presence and absence of the various metal ions is different and particular to any given metal ion. In addition, we studied the EIS of ds-DNA films containing a single A-C mismatch in the presence and absence of Ca2+, Zn2+, Cd2+ and Hg2+. DeltaR(ct) values for ds-DNA films with a single A-C mismatch is smaller than those of fully matched ds-DNA films.
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Affiliation(s)
- Xiaomin Bin
- Department of Chemistry, University of Western Ontario, 1151 Richmond Street, London, Ontario, Canada N6A 5B7
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Sundaresan N, Suresh CH, Thomas T, Thomas TJ, Pillai CKS. Liquid Crystalline Phase Behavior of High Molecular Weight DNA: A Comparative Study of the Influence of Metal Ions of Different Size, Charge and Binding Mode. Biomacromolecules 2008; 9:1860-9. [DOI: 10.1021/bm800101x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Neethu Sundaresan
- Chemical Sciences and Technology Division and Computational Modeling and Simulation Section, National Institute for Interdisciplinary Science and Technology (formerly Regional Research Laboratory), Council of Scientific and Industrial Research, Thiruvananthapuram 695019, India, and Departments of Environmental and Occupational Medicine and Medicine, The Cancer Institute of New Jersey, University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, New Jersey 08903
| | - Cherumuttathu H. Suresh
- Chemical Sciences and Technology Division and Computational Modeling and Simulation Section, National Institute for Interdisciplinary Science and Technology (formerly Regional Research Laboratory), Council of Scientific and Industrial Research, Thiruvananthapuram 695019, India, and Departments of Environmental and Occupational Medicine and Medicine, The Cancer Institute of New Jersey, University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, New Jersey 08903
| | - Thresia Thomas
- Chemical Sciences and Technology Division and Computational Modeling and Simulation Section, National Institute for Interdisciplinary Science and Technology (formerly Regional Research Laboratory), Council of Scientific and Industrial Research, Thiruvananthapuram 695019, India, and Departments of Environmental and Occupational Medicine and Medicine, The Cancer Institute of New Jersey, University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, New Jersey 08903
| | - T. J. Thomas
- Chemical Sciences and Technology Division and Computational Modeling and Simulation Section, National Institute for Interdisciplinary Science and Technology (formerly Regional Research Laboratory), Council of Scientific and Industrial Research, Thiruvananthapuram 695019, India, and Departments of Environmental and Occupational Medicine and Medicine, The Cancer Institute of New Jersey, University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, New Jersey 08903
| | - C. K. S. Pillai
- Chemical Sciences and Technology Division and Computational Modeling and Simulation Section, National Institute for Interdisciplinary Science and Technology (formerly Regional Research Laboratory), Council of Scientific and Industrial Research, Thiruvananthapuram 695019, India, and Departments of Environmental and Occupational Medicine and Medicine, The Cancer Institute of New Jersey, University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, New Jersey 08903
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He W, Franzini RM, Achim C. Metal-Containing Nucleic Acid Structures Based on Synergetic Hydrogen and Coordination Bonding. PROGRESS IN INORGANIC CHEMISTRY 2008. [DOI: 10.1002/9780470144428.ch8] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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20
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Choi JY, Lee JM, Lee H, Jung MJ, Kim SK, Kim JM. Mixing ratio-dependent energy transfer from DNA-bound 4′,6-diamidino-2-phenylindole to [Ru(1,10-phenanthroline)2dipyrido[3,2-a:2′,3′-c]phenazine]2+. Biophys Chem 2008; 134:56-63. [DOI: 10.1016/j.bpc.2008.01.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2007] [Revised: 01/16/2008] [Accepted: 01/17/2008] [Indexed: 10/22/2022]
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Kirin SI, Yennawar HP, Williams ME. Synthesis and Characterization of CuII Complexes with Amino Acid Substituted Di(2-pyridyl)amine Ligands. Eur J Inorg Chem 2007. [DOI: 10.1002/ejic.200700273] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Joseph J, Schuster GB. Long-Distance Radical Cation Hopping in DNA: The Effect of Thymine−Hg(II)−Thymine Base Pairs. Org Lett 2007; 9:1843-6. [PMID: 17417861 DOI: 10.1021/ol070135a] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Thymine-Hg(II)-thymine base pairs have been incorporated in an oligonucleotide duplex to study their effect on DNA-mediated charge transport. The introduction of a formally charged Hg atom inside the DNA base core does not significantly alter the charge hopping and trapping properties, as discussed in this paper. Hg(II) replaces the protons normally found on thymines within the complex and acts like a "big proton" in terms of its role in DNA charge transport.
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Affiliation(s)
- Joshy Joseph
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332, USA
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Abstract
Very recently it has been shown that stable metal-mediated base pairs [Thymine-Hg-Thymine] can form in DNA. To estimate the effect of such pairs on the efficiency of charge transfer through DNA, we carry out quantum mechanical calculations of double-stranded pi-stacks GXG, GXXG, and GXXXG, where X = [Thymine-Hg-Thymine] and stacks GT(n)G of canonical base pairs. The charge-transfer efficiency in short duplexes GXG and GTG is found to be similar. However, the donor-acceptor coupling in GXXG and GXXXG is stronger by a factor of 2.5-3.0 than that in GT(n)G (n = 2 and 3), respectively. It is shown that the valence orbitals of Hg atoms do not essentially participate in mediating the electronic coupling for hole transfer; however, they may play an important role in excess electron transfer.
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Affiliation(s)
- Alexander A Voityuk
- Institució Catalana de Recerca i Estudis Avançats, Institute of Computational Chemistry, Universitat de Girona, 17071 Girona, Spain.
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