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Nguyen KA, Pachter R, Day PN, Su H. Theoretical analysis of structures and electronic spectra in molecular cadmium chalcogenide clusters. J Chem Phys 2015; 142:234305. [PMID: 26093557 DOI: 10.1063/1.4922320] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
We present calculated structural and optical properties of molecular cadmium chalcogenide nonstoichiometric clusters with a size range of less than 1 nm to more than 2 nm with well-defined chemical compositions and structures in comparison to experimental characterization and previous theoretical work. A unified treatment of these clusters to obtain a fundamental understanding of the size, ligand, and solvation effects on their optical properties has not been heretofore presented. The clusters belong to three topological classes, specifically supertetrahedral (Tn), penta-supertetrahedral (Pn), and capped supertetrahedral (Cn), where n is the number of metal layers in each cluster. The tetrahedrally shaped Tn clusters examined in this work are Cd(ER)4(2-) (T1), Cd4(ER)10(2-) (T2), and Cd10E4 (')(ER)16(4-) (T3), where R is an organic group, E and E' are chalcogen atoms (sulfur or selenium). The first member of the Pn series considered is M8E'(ER)16(2-). For the Cn series, we consider the first three members, M17E4 (')(ER)28(2-), M32E14 (')(ER)36L4, and M54E32 (')(ER)48L4(4-) (L = neutral ligand). Mixed ligand clusters with capping ER groups replaced by halogen or neutral ligands were also considered. Ligands and solvent were found to have a large influence on the color and intensity of the electronic absorption spectra of small clusters. Their effects are generally reduced with increasing cluster sizes. Blueshifts were observed for the first electronic transition with reduced size for both cadmium sulfide and cadmium selenide series. Due to weakly absorbing and forbidden transitions underlying the one-photon spectra, more care is needed in interpreting the quantum confinement from the clusters' lowest-energy absorption bands.
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Affiliation(s)
- Kiet A Nguyen
- Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, USA
| | - Ruth Pachter
- Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, USA
| | - Paul N Day
- Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, USA
| | - Haibin Su
- Nanyang Technological University, Singapore 639798, Singapore
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Sutherland DEK, Stillman MJ. Challenging conventional wisdom: single domain metallothioneins. Metallomics 2014; 6:702-28. [DOI: 10.1039/c3mt00216k] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Metallation studies of human metallothioneins support the role of single metal-binding-domains as commonplace with the typical two-domain-cluster structure as exceptional.
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Maiti BK, Avilés T, Matzapetakis M, Moura I, Pauleta SR, Moura JJG. Synthesis of [MoS
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2–
–M (M = Cu and Cd) Clusters: Potential NMR Spectroscopic Structural Probes for the Orange Protein. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200551] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Biplab K. Maiti
- REQUIMTE/CQFB, Departamento de Química, FCT Universidade Nova de Lisboa, 2829‐516 Caparica, Portugal, Fax: +351‐212948550, http://sites.fct.unl.pt/biologicalchemistryatfctunl/
| | - Teresa Avilés
- REQUIMTE/CQFB, Departamento de Química, FCT Universidade Nova de Lisboa, 2829‐516 Caparica, Portugal, Fax: +351‐212948550, http://sites.fct.unl.pt/biologicalchemistryatfctunl/
| | - Manolis Matzapetakis
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Rua da Quinta Grande 6, Apartado 127, 2780‐156, Oeiras, Portugal
| | - Isabel Moura
- REQUIMTE/CQFB, Departamento de Química, FCT Universidade Nova de Lisboa, 2829‐516 Caparica, Portugal, Fax: +351‐212948550, http://sites.fct.unl.pt/biologicalchemistryatfctunl/
| | - Sofia R. Pauleta
- REQUIMTE/CQFB, Departamento de Química, FCT Universidade Nova de Lisboa, 2829‐516 Caparica, Portugal, Fax: +351‐212948550, http://sites.fct.unl.pt/biologicalchemistryatfctunl/
| | - José J. G. Moura
- REQUIMTE/CQFB, Departamento de Química, FCT Universidade Nova de Lisboa, 2829‐516 Caparica, Portugal, Fax: +351‐212948550, http://sites.fct.unl.pt/biologicalchemistryatfctunl/
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Jalilehvand F, Amini Z, Parmar K, Kang EY. Cadmium(ii) N-acetylcysteine complex formation in aqueous solution. Dalton Trans 2011; 40:12771-8. [DOI: 10.1039/c1dt11705j] [Citation(s) in RCA: 20] [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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Abstract
Cadmium-113 nuclear magnetic resonance spectroscopy has been used in studies of the structure and dynamics of inorganic and bioinorganic molecules. Chemical dynamics play an important role in the analysis of relaxation and chemical shift data. Naïve interpretations of relaxation data can be checked by performing these experiments at a variety of temperatures and magnetic field strengths. A combination of solid- and liquid-state nuclear magnetic resonance measurements can provide the user with unambiguous data on chemical shielding. These data can be used to characterize zinc and calcium ion binding sites in metalloproteins.
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Bendova M, Puchberger M, Schubert U. Characterization of “Cd10S4(SPh)12”, the Thermal Decomposition Product of (NMe4)4[Cd10S4(SPh)16]: Synthesis of a Neutral Cd54 Sulfide Cluster and of a Polymeric Chain of Thiolate-Bridged Cd17 Sulfide Clusters. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000454] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Mah V, Jalilehvand F. Cadmium(II) complex formation with glutathione. J Biol Inorg Chem 2009; 15:441-58. [PMID: 20035360 DOI: 10.1007/s00775-009-0616-3] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2009] [Accepted: 12/04/2009] [Indexed: 11/24/2022]
Abstract
Complex formation between heavy metal ions and glutathione (GSH) is considered as the initial step in many detoxification processes in living organisms. In this study the structure and coordination between the cadmium(II) ion and GSH were investigated in aqueous solutions (pH 7.5 and 11.0) and in the solid state, using a combination of spectroscopic techniques. The similarity of the Cd K-edge and L(3)-edge X-ray absorption spectra of the solid compound [Cd(GS)(GSH)]ClO(4).3H(2)O, precipitating at pH 3.0, with the previously studied cysteine compound {Cd(HCys)(2).H(2)O}(2).H(3)O(+).ClO(4) (-) corresponds to Cd(S-GS)(3)O (dominating) and Cd(S-GS)(4) four-coordination within oligomeric complexes with mean bond distances of 2.51 +/- 0.02 A for Cd-S and 2.24 +/- 0.04 A for Cd-O. For cadmium(II) solutions (C (Cd(II)) approximately 0.05 M) at pH 7.5 with moderate excess of GSH (C (GSH)/C (Cd(II)) = 3.0-5.0), a mix of Cd(S-GS)(3)O (dominating) and Cd(S-GS)(4) species is consistent with the broad (113)Cd NMR resonances in the range 632-658 ppm. In alkaline solutions (pH 11.0 and C (GSH)/C (Cd(II)) = 2.0 or 3.0), two distinct peaks at 322 and 674 ppm are obtained. The first peak indicates six-coordinated mononuclear and dinuclear complexes with CdS(2)N(2)(N/O)(2) and CdSN(3)O(2) coordination in fast exchange, whereas the second corresponds to Cd(S-GS)(4) sites. At high ligand excess the tetrathiolate complex, Cd(S-GS)(4), characterized by a sharp delta((113)Cd) NMR signal at 677 ppm, predominates. The average Cd-S distance, obtained from the X-ray absorption spectra, varied within a narrow range, 2.49-2.53 A, for all solutions (pH 7.5 and 11.0) regardless of the coordination geometry.
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Affiliation(s)
- Vicky Mah
- Department of Chemistry, University of Calgary, Calgary, AB, T2N 1N4, Canada
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Synthesis and structural characterization of cadmium(II) complexes with chelating keto-hydroxy compounds: The X-ray molecular structure of [Cd2(nq)4(H2O)4]·3H2O (nqH=2-hydroxynaphthoquinone). Polyhedron 2009. [DOI: 10.1016/j.poly.2009.08.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Rigby Duncan KE, Kirby CW, Stillman MJ. Metal exchange in metallothioneins - a novel structurally significant Cd5 species in the alpha domain of human metallothionein 1a. FEBS J 2008; 275:2227-39. [DOI: 10.1111/j.1742-4658.2008.06375.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Wright JG, Natan MJ, MacDonnel FM, Ralston DM, O'Halloran TV. Mercury(II)-Thiolate Chemistry and the Mechanism of the Heavy Metal Biosensor MerR. PROGRESS IN INORGANIC CHEMISTRY 2007. [DOI: 10.1002/9780470166390.ch6] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Zaman KM, Blue LY, Huggins FE, Atwood DA. Cd, Hg, and Pb Compounds of Benzene-1,3-diamidoethanethiol (BDETH(2)). Inorg Chem 2007; 46:1975-80. [PMID: 17323915 DOI: 10.1021/ic0607639] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Benzene-1,3-diamidoethanethiol (BDETH2) is an exceptional precipitant for removing soft heavy metals from water. The present work will detail the bonding arrangement of BDETH2 to the metals Cd, Hg, and Pb, along with the full characterization data of the BDET-M compounds. It was found that the Hg compound has a linear S-M-S geometry. The characterization data consisted of Mp, EA, IR, Raman, MS, XANES, EXAFS, and solid-state multinuclear NMR.
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Affiliation(s)
- K M Zaman
- Department of Chemistry and CFFS/CME, University of Kentucky, Lexington, Kentucky 40506, USA
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Forsén S, Lindman B. Ion binding in biological systems as studied by NMR spectroscopy. METHODS OF BIOCHEMICAL ANALYSIS 2006; 27:289-486. [PMID: 7022113 DOI: 10.1002/9780470110478.ch5] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Helm ML, Hill LL, Lee JP, Van Derveer DG, Grant GJ. Cadmium-113 NMR studies on homoleptic complexes containing thioether ligands: the crystal structures of [Cd([12]aneS4)2](ClO4)2, [Cd([18]aneS4N2)](PF6)2 and [Cd([9]aneS3)2](PF6)2. Dalton Trans 2006:3534-43. [PMID: 16855755 DOI: 10.1039/b601665k] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the measurement of 113Cd NMR chemical shift data for homoleptic thioether and related aza and mixed aza/thiacrown complexes. In a series of Cd(II) complexes containing trithioether to hexathioether ligands, we observe solution 113Cd NMR chemical shifts in the range of 225 to 731 ppm. Upfield chemical shifts in these NMR spectra are seen whenever: (a) the number of thioether sulfur donors in the complex is decreased, (b) a thioether sulfur donor is replaced by a secondary nitrogen donor, or (c) the size of the macrocycle ring increases without a change in the nature or number of the donor atoms. Changes in the identity of non-coordinating anions such as perchlorate or hexafluorophosphate have little effect upon the 113Cd NMR chemical shift in solution. We report the X-ray structure of the complex [Cd([12]aneS4)2](ClO4)2 ([12]aneS4 = 1,4,7,10-tetrathiacyclododecane) (1) which shows the first example of octakis(thioether) coordination of a metal ion, forming an unusual eight-coordinate square antiprismatic structure. We report the X-ray structure of the complex [Cd([9]aneS3)2](PF6)2 ([9]aneS3 = 1,4,7-trithiacyclononane) (3a) which shows hexakis(thioether) coordination to form a distorted octahedral structure. We have also prepared and characterized the Cd(II) complex of a mixed azathiacrown, [Cd([18]aneS4N2)](PF6)2 ([18]aneS4N2 = 1,4,10,13-tetrathia-7,16-diazacyclooctadecane) (6). Its X-ray structure shows a distorted octahedral S4N2 environment around the Cd(II) with the ligand coordinated in the rac fashion. We observe a solvent- and temperature-dependent 14N-1H coupling in the 1H NMR spectrum of the complex which is not present in analogous complexes with this ligand.
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Affiliation(s)
- Monte L Helm
- Department of Chemistry, University of Tennessee at Chattanooga, Chattanooga, TN 37403, USA
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Formation and structure of novel ternary complexes of thallium(III)-cyanide–amine (ethylenediamine and triethylenetetramine) in solution and in solid. Inorganica Chim Acta 2003. [DOI: 10.1016/s0020-1693(02)01315-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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A variety of metal chalcogenide clusters: MOLCAO calculations and interplay between quantum-sized semiconductors and multinuclear complexes. Colloids Surf A Physicochem Eng Asp 2002. [DOI: 10.1016/s0927-7757(01)01081-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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Kritikos M, Ma G, Bodor A, Glaser J. Novel bis(diethylenetriamine)thallium(III) complex. Synthesis and characterization in pyridine solution and in solid. Inorganica Chim Acta 2002. [DOI: 10.1016/s0020-1693(01)00813-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ma G, Kritikos M, Glaser J. Small Platinum−Thallium Clusters Stabilized by Ethylenediamine, [(NC)5Pt−Tl(en)n−1] (n = 1−3) − Characterization in Solution and in the Solid State. Eur J Inorg Chem 2001. [DOI: 10.1002/1099-0682(200105)2001:5<1311::aid-ejic1311>3.0.co;2-w] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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19
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Xu W, Evilia RF. NMR study of cadmium(II)–triflate coordination. Inorganica Chim Acta 2000. [DOI: 10.1016/s0020-1693(00)00226-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Grapperhaus CA, Tuntulani T, Reibenspies JH, Darensbourg MY. Methylation of Tethered Thiolates in [(bme-daco)Zn](2) and [(bme-daco)Cd](2) as a Model of Zinc Sulfur-Methylation Proteins. Inorg Chem 1998; 37:4052-4058. [PMID: 11670523 DOI: 10.1021/ic971599f] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The dimeric dithiolate complex [1,5-bis(mercaptoethyl)-1,5-diazacyclooctanato]zinc(II), [(bme-daco)Zn](2) or Zn-1, and its cadmium analogue, Cd-1, were investigated as models for the active site of zinc-dependent methylation proteins. The key issue addressed was whether alkylation of a thiolate in a relatively rigid tetradentate ligand would result in coordination of the thioether product to the metal. On the basis of (1)H and (13)C NMR spectroscopy and similar reactivity toward alkylating agents, the newly synthesized cadmium complex, Cd-1, is proposed to be isostructural with the previously reported Zn-1 complex, which is known from X-ray crystallography to be dimeric in the solid state (Tuntulani, T.; Reibenspies, J. H.; Farmer, P. J.; Darensbourg, M. Y. Inorg. Chem.1992, 31, 3497). Iodomethane reacts with Zn-1 in hot CH(3)OH/CH(3)CN to produce a thioether which dissociates, replaced by coordination of iodide in the pseudotetrahedral complex, (Me(2)bme-daco)ZnI(2) or Zn-2. Complex Zn-2 crystallizes in the triclinic P&onemacr; space group with a = 7.911(2) Å, b = 10.675(2) Å, c = 12.394(2) Å, alpha = 75.270(10) degrees, beta = 75.270(10) degrees, gamma = 82.12(2) degrees, V = 998.270 Å(3), and Z = 2. An analogous reaction was observed for the cadmium derivative, Cd-1, which displays a (1)H NMR spectrum identical to that of Zn-2. In attempts to promote thioether binding, the iodide was displaced by addition of AgBF(4) to solutions of Zn-2 or the BF(4)(-) analogue was synthesized directly from Zn(BF(4))(2) and methylated ligand, Me(2)bme-daco, to yield Zn-3. Similar reactions with the cadmium analogue yielded a product identified as Cd-3 that was indistinguishable from Zn-3 by (1)H NMR. The (113)Cd NMR spectra of Cd-3 displayed a single resonance at 88 ppm consistent with a hard donor environment and inconsistent with sulfur binding. As a further attempt to induce thioether binding to zinc, the macrocyclization reagent 1,3-dibromopropane was added to Zn-1. The resulting product, [BrZn(macrocycle)](+), was only slightly soluble in pyridine and identified by +FAB/MS as the desired macrocyclic product with a large amount of free macrocycle ligand. Recrystallization from pyridine/ether resulted in loss of the zinc as Zn(py)(2)Br(2), which was obtained as colorless crystals and characterized by X-ray crystallography. Complex Zn(py)(2)Br(2) crystallizes in the monoclinic P2(1)/c space group with a = 8.534(2) Å, b = 18.316(4) Å, c = 8.461(2) Å, beta = 101.07(3) degrees, V = 1297.9(5) Å(3), and Z = 4.
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Chung KH, Rhee SW, Shin HS, Moon CH. Probe of cadmium(II) binding on soil fulvic acid investigated by113Cd NMR spectroscopy. CAN J CHEM 1996. [DOI: 10.1139/v96-152] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Binding of cadmium(II) on soil fulvic acid (FA) was investigated over a range of fulvate-to-cadmium concentration ratios (8 – 59 equiv. mol−1) using113Cd NMR spectroscopy. The113Cd chemical shift of cadmium bound on fulvate was observed in a more downfield region (δ −20.4 to −15.6) than that bound on synthetic polymers, poly(acrylic acid) (PAA: δ −36.6 to −38.2), poly(methacrylic acid) (PMAA: δ −34.0 to −25.4), and poly(vinyl benzoic acid) (PVBA: δ −34.7 to −31.2). The calculated values of individual chemical shifts for the species CdL+and CdL2(L: carboxylate) formed in Cd(II)–carboxylate systems (e.g., acetate, benzoate) are δ −22 to −24 and δ −39 to −40, respectively. The relative downfield shift of cadmium(II)–fulvate suggests that functional groups (e.g., hydroxyl and neutral N donor) other than carboxylates may be involved in cadmium coordination. The chemical shifts of cadmium complexes of hydroxycarboxylates (e.g., glycolate) or carboxylates containing neutral N donor (e.g., picolinate) were generally observed in more downfield regions than their carboxylate counterparts. Key words: fulvic acid, polyfunctionality, binding sites, chemical shift,113Cd NMR.
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23
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Gurin VS. Electronic Structure of CdS Cores in Cd Thiolate Complexes and Clusters. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp9527620] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- V. S. Gurin
- Physico-Chemical Research Institute, Belarusian State University, Leningradskaja str., 14, Minsk, 220080, Belarus
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Vossmeyer T, Reck G, Katsikas L, Haupt ET, Schulz B, Weller H. A "Double-Diamond Superlattice" Built Up of Cd17S4(SCH2CH2OH)26 Clusters. Science 1995; 267:1476-9. [PMID: 17743546 DOI: 10.1126/science.267.5203.1476] [Citation(s) in RCA: 299] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
A simple preparation of Cd(17)S(4)(SCH(2)CH(2)OH)(26) clusters in aqueous solution leads to the formation of colorless blocky crystals. X-ray structure determinations revealed a superlattice framework built up of covalently linked clusters. This superlattice is best described as two enlarged and interlaced diamond or zinc blende lattices. Because both the superlattice and the clusters display the same structural features, the crystal structure resembles the self-similarities known from fractal geometry. The optical spectrum of the cluster solution displays a sharp transition around 290 nanometers with a large absorption coefficient ( approximately 84,000 per molar per centimeter).
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Zaima H, Ueyama N, Adachi H, Nakamura A. 1H-, 13C-, and 113Cd-NMR study of the Cd(II) complex of a blocked peptide, Z-Cys-Ala-Pro-His-OMe, in organic solvents. Biopolymers 1995; 35:319-29. [PMID: 7703375 DOI: 10.1002/bip.360350307] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The Cd(II) complex of a peptide, Z-Cys-Ala-Pro-His-OMe was prepared and characterized by absorption, CD, 1H-, 13C-, and 113Cd-nmr, and nuclear Overhauser effect spectroscopy (NOESY) spectra to show the coordination of cysteine thiolate and histidine imizazole to Cd(II) ion. The NOESY spectra in dimethyl formamide showed that the cysteine residue was in proximity to the histidine residue. These results reveal the chelation of Z-Cys-Ala-Pro-His-OMe to Cd(II) ion in solution. Temperature-dependent dissociation equilibrium of histidine imidazole in solution was observed in this complex. Structural features of the chelating peptide are discussed.
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Affiliation(s)
- H Zaima
- Department of Macromolecular Science, Faculty of Science, Osaka University, Japan
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Ichinose I, Asai T, Yoshimura S, Kimizuka N, Kunitake T. Two-Dimensional Arrangement or Polynuclear Metal Complexes in the Interlayer of Multibilayer Cast Films. CHEM LETT 1994. [DOI: 10.1246/cl.1994.1837] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Garcia-Fontan S, Rodriguez-Seoane P, Casas JS, Sordo J, Jones MM. Spectroscopic study of cadmium(II) complexes with heterocyclic dithiocarbamate ligands. Inorganica Chim Acta 1993. [DOI: 10.1016/s0020-1693(00)85604-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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28
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Narula SS, Winge DR, Armitage IM. Copper- and silver-substituted yeast metallothioneins: sequential 1H NMR assignments reflecting conformational heterogeneity at the C terminus. Biochemistry 1993; 32:6773-87. [PMID: 8329400 DOI: 10.1021/bi00077a032] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Complete 1H NMR sequential assignments have been made for copper(I)- and silver (I)-substituted metallothionein (MT) from Saccharomyces cerevisiae using standard 2D 1H NMR methods. The fingerprint region of the COSY spectrum of both metalloproteins shows a doubling of a few backbone proton resonances from residue K41 onward in the C terminus. This doubling of resonances is absent in the spectrum of the truncated mutant protein that lacks the five C-terminal residues which includes two cysteines. Concurrently, it has been established from a comparison of the heteronuclear 1H-109 Ag multiple-quantum coherence transfer (HMQC) spectrum on the silver-substituted mutant and the wild-type protein that metal ligation is similar in both molecules. Thus, the 2 C-terminal Cys are not essential for metal cluster formation in the wild-type yeast MT and only 10 of the 12 Cys present in this protein appear to be involved in ligating the 7 mol of bound metal ions. A qualitative analysis of the coupling constant, hydrogen exchange, and NOE data indicates the presence of many type I beta-turns and the lack of any other regular secondary structural elements. A comparison of chemical shifts and NOE data for native copper- and silver-substituted yeast MT indicates a high degree of conservation of structural elements in both proteins. Therefore, it seems reasonable to conclude that the metal to Cys connectivities which are obtained directly from the HMQC data on silver-substituted metallothionein are conserved in the native copper protein. Interestingly, a mixture of both 2 and 3 coordination was found for the bound Ag(I) ions in a single Ag7Cys10 cluster. This mixed coordination number and a single cluster arrangement is most probably also shared with the Cu(I) ion coordination in the native protein.
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Affiliation(s)
- S S Narula
- Department of Pharmacology, Yale University School of Medicine, New Haven, Connecticut 06510
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Affiliation(s)
- J E Coleman
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut 06510
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Ozutsumi K, Takamuku T, Ishiguro SI, Ohtaki H. EXAFS and X-Ray Diffraction Studies on the Structure of the Tetrathiocyanatocadmate(II) Complex in Dimethyl Sulfoxide. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1992. [DOI: 10.1246/bcsj.65.2104] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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31
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Structures and stabilities of metal(II) (Co(II), Ni(II), Cu(II), Zn(II), Pd(II), Cd(II)) compounds of N-protected amino acids. Coord Chem Rev 1992. [DOI: 10.1016/0010-8545(92)80020-r] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Boulmaaz S, Papiernik R, Hubert-Pfalzgraf LG, Vaissermann J, Daran JC. Synthesis and molecular structure of Cd9(OC2H4OMe)18,2HOC2H4OMe, the first cadmium aggregate based on oxygen donor ligands. Polyhedron 1992. [DOI: 10.1016/s0277-5387(00)83362-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Li H, Amma E. A novel square planar Cd(II) with four sulfur donor ligands: crystal structure and 113Cd NMR. Inorganica Chim Acta 1990. [DOI: 10.1016/s0020-1693(00)91900-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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34
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Spectroscopic characterization of anionic tris(N,N-dialkyldithiocarbamate) complexes of zinc(II) and cadmium(II). Inorganica Chim Acta 1989. [DOI: 10.1016/s0020-1693(00)83216-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Adebodun F, Jordan F. Multinuclear magnetic resonance studies on the calcium (II) binding site in trypsin, chymotrypsin, and subtilisin. Biochemistry 1989; 28:7524-31. [PMID: 2692702 DOI: 10.1021/bi00445a005] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Two different nuclear magnetic resonance experiments were conducted to elucidate the properties of the Ca(II) binding locus on serine proteases in solution. Trypsin, alpha-chymotrypsin, and subtilisin were inactivated with diisopropyl fluorophosphate, and the distance of the phosphorus from Gd(III) in place of Ca(II) was determined from the lanthanide-induced relaxation on the 31P resonance. The distances found (between 20 and 21 A) were in excellent agreement with those reported in the X-ray crystallographic structures of trypsin and subtilisin, demonstrating that the method has wide applicability to systems for which no X-ray structure is available. Subsequently, the 113Cd spectra [in place of Ca(II)] were examined in the presence of the native enzymes. At ambient temperatures only a single 113Cd resonance could be observed, presumably representing the weighted average of the variously weakly bound ions and the free ion. At 280 K for trypsin and chymotrypsin, and at 268 K for subtilisin there was observed a resonance at ca. 65-70 ppm higher field than the previous averaged resonance that could be attributed to tightly bound Cd. The chemical shift of the resonance was consistent with its assignment to an octahedral environment around Cd with oxygen ligands.
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Affiliation(s)
- F Adebodun
- Department of Chemistry, Rutgers, State University of New Jersey, Newark 07102
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Elgren TE, Wilcox DE. A unique low frequency Raman band associated with metal binding to metallothionein. Biochem Biophys Res Commun 1989; 163:1093-9. [PMID: 2528950 DOI: 10.1016/0006-291x(89)92333-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We find that the low frequency Raman spectrum of Zn(II) metallothionein has a single prominent band at 138 cm-1 which is absent from the Raman spectrum of the metal-free protein. This feature is also found for Cd(II) binding to both of the independent metallothionein domains and the metallothionein from Neurospora crassa. TcO(III) coordination to metallothionein results in a similar Raman band which is also found for the complex (Ph4As)[ReO(SCH2CH2S)2]. By comparing these results to literature data for metal-thiolate complexes, this feature is identified as a bending vibration which appears to be characteristic of metal ion coordination by the metallothionein cysteines. Two likely assignments are a symmetric metal-centered mode (delta S-M-S) or a bending mode of the metal-coordinated cysteine thiolates (delta M-S-C).
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Affiliation(s)
- T E Elgren
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755
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37
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Rodehüser L, Chniber T, Rubini P, Delpuech JJ. Mixed ligand complexes containing β-diphosphoramides. I. Substitution of DMSO by NIPA in solvates of Cd(II). A cadmium-113 NMR study. Inorganica Chim Acta 1988. [DOI: 10.1016/s0020-1693(00)87506-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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38
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Presence of endogenous calcium ion in horseradish peroxidase. Elucidation of metal-binding site by substitutions of divalent and lanthanide ions for calcium and use of metal-induced NMR (1H and 113Cd) resonances. J Biol Chem 1986. [DOI: 10.1016/s0021-9258(18)67667-7] [Citation(s) in RCA: 70] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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41
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Cd-113 and Al-27 NMR relaxation study of aquoeus solutions adsorbed on silica gels and zeolite NaY. Chem Phys 1985. [DOI: 10.1016/0301-0104(85)85103-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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43
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Metal Ion NMR: Application to Biological Systems. ACTA ACUST UNITED AC 1985. [DOI: 10.1016/b978-0-12-152514-9.50011-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
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44
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Fernàndez A, Kisch H. Photophysikalische und photochemische Eigenschaften von Metalldithiolenen. ACTA ACUST UNITED AC 1984. [DOI: 10.1002/cber.19841171010] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Sommer R, Beyersmann D. Zinc and cadmium in 5-aminolevulinic acid dehydratase. Equilibrium, kinetic, and 113Cd-nmr-studies. J Inorg Biochem 1984; 20:131-45. [PMID: 6716101 DOI: 10.1016/0162-0134(84)80013-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
5-Aminolevulinic acid dehydratase (ALAD) from bovine liver contains zinc that is partially lost during the isolation of the enzyme. ALAD has its maximal activity at 10(-5) M ZnCl2. It binds 7.4 Zn per octameric protein with an association constant of 5.3 X 10(6)M-1. ALAD is inactivated by 1,10-phenanthroline or ethylenediaminetetraacetic acid (EDTA) but not by monodentate anions like cyanide or sulfide. After removal of zinc by chelating agents, the enzyme activity may be restored by Zn2+ or Cd2+. Removal of zinc by EDTA increases KM 60-fold and decreases Vmax to about 1/2 of its original value. The 113Cd nuclear magnetic resonance spectrum of the enzyme reconstituted with 113Cd-acetate exhibits a single sharp resonance signal at 79 ppm. It does not change by the addition of substrate but disappears when the inhibitor lead acetate is added. Therefore, an immediate interaction between the metal ion of the enzyme and the substrate is excluded, whereas lead changes the environment of cadmium and probably of zinc too.
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Avdeef A, Brown JA. Cadmium binding by biological ligands. 2 [1]. Formation of protonated and polynuclear complexes between cadmium and 2-mercaptoethylamine. Inorganica Chim Acta 1984. [DOI: 10.1016/s0020-1693(00)84221-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ribeiro A, Parello J, Jardetzky O. NMR studies of muscle proteins. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 1984; 43:95-160. [PMID: 6377387 DOI: 10.1016/0079-6107(84)90005-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Ellis PD, Yang PP, Palmert AR. Cadmium-113 NMR spin-lattice relaxation and exchange kinetics in concanavalin A: A double saturation transfer experiment. ACTA ACUST UNITED AC 1983. [DOI: 10.1016/0022-2364(83)90193-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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49
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Nakashima TT, Rabenstein DL. A lead-207 nuclear magnetic resonance study of the complexation of lead by carboxylic acids and aminocarboxylic acids. ACTA ACUST UNITED AC 1983. [DOI: 10.1016/0022-2364(83)90004-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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50
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Alyea EC. The observation of long range substituent effects in cadmium schiff base complexes by cadmium-133 NMR spectroscopy. Inorganica Chim Acta 1983. [DOI: 10.1016/s0020-1693(00)81520-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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