1
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Neuhaus D. Zinc finger structure determination by NMR: Why zinc fingers can be a handful. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2022; 130-131:62-105. [PMID: 36113918 PMCID: PMC7614390 DOI: 10.1016/j.pnmrs.2022.07.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 07/09/2022] [Accepted: 07/10/2022] [Indexed: 06/07/2023]
Abstract
Zinc fingers can be loosely defined as protein domains containing one or more tetrahedrally-co-ordinated zinc ions whose role is to stabilise the structure rather than to be involved in enzymatic chemistry; such zinc ions are often referred to as "structural zincs". Although structural zincs can occur in proteins of any size, they assume particular significance for very small protein domains, where they are often essential for maintaining a folded state. Such small structures, that sometimes have only marginal stability, can present particular difficulties in terms of sample preparation, handling and structure determination, and early on they gained a reputation for being resistant to crystallisation. As a result, NMR has played a more prominent role in structural studies of zinc finger proteins than it has for many other types of proteins. This review will present an overview of the particular issues that arise for structure determination of zinc fingers by NMR, and ways in which these may be addressed.
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Affiliation(s)
- David Neuhaus
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK.
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2
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Valentine AJ, Taylor LJ, Geer AM, Huke CD, Wood KE, Tovey W, Lewis W, Argent SP, Teale AM, McMaster J, Kays DL. Structural and Electronic Studies of Substituted m-Terphenyl Group 12 Complexes. Organometallics 2022; 41:1426-1433. [PMID: 36157255 PMCID: PMC9490839 DOI: 10.1021/acs.organomet.2c00156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Indexed: 12/03/2022]
Abstract
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The effects of para-substitution on the structural
and electronic properties of four series of two-coordinate m-terphenyl Group 12 complexes (R-Ar#)2M (M = Zn, Cd, Hg; R = t-Bu 1–3, SiMe34–6,
Cl 7–9, CF310–12, where R-Ar# = 2,6-{2,6-Xyl}2-4-R-C6H2 and 2,6-Xyl = 2,6-Me2C6H3) have been investigated. X-ray crystallography
shows little structural variation across the series, with no significant
change in the C–M–C bond distances and angles. However,
considerable electronic differences are revealed by heteronuclear
nuclear magnetic resonance (NMR) spectroscopy; a linear correlation
is observed between the 113Cd, 199Hg, and 1H (2,6-Xyl methyl protons) NMR chemical shifts of the para-substituted complexes and the Hammett constants for
the R-substituents. Specifically, an upfield shift in the NMR signal
is observed with increasingly electron-withdrawing R-substituents.
Density functional theory (DFT) calculations are employed to attempt
to rationalize these trends.
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Affiliation(s)
- Andrew J. Valentine
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - Laurence J. Taylor
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - Ana M. Geer
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Cameron D. Huke
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - Katherine E. Wood
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - Will Tovey
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - William Lewis
- School of Chemistry, The University of Sydney, F11, Eastern Avenue, Sydney, NSW 2006, Australia
| | - Stephen P. Argent
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - Andrew M. Teale
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - Jonathan McMaster
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - Deborah L. Kays
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
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3
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Solvent mediated photoluminescence responses over mixed-linker cadmium (II) based metal–organic frameworks. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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4
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Anaraki MT, Lysak DH, Downey K, Kock FVC, You X, Majumdar RD, Barison A, Lião LM, Ferreira AG, Decker V, Goerling B, Spraul M, Godejohann M, Helm PA, Kleywegt S, Jobst K, Soong R, Simpson MJ, Simpson AJ. NMR spectroscopy of wastewater: A review, case study, and future potential. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2021; 126-127:121-180. [PMID: 34852923 DOI: 10.1016/j.pnmrs.2021.08.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 08/12/2021] [Accepted: 08/13/2021] [Indexed: 06/13/2023]
Abstract
NMR spectroscopy is arguably the most powerful tool for the study of molecular structures and interactions, and is increasingly being applied to environmental research, such as the study of wastewater. With over 97% of the planet's water being saltwater, and two thirds of freshwater being frozen in the ice caps and glaciers, there is a significant need to maintain and reuse the remaining 1%, which is a precious resource, critical to the sustainability of most life on Earth. Sanitation and reutilization of wastewater is an important method of water conservation, especially in arid regions, making the understanding of wastewater itself, and of its treatment processes, a highly relevant area of environmental research. Here, the benefits, challenges and subtleties of using NMR spectroscopy for the analysis of wastewater are considered. First, the techniques available to overcome the specific challenges arising from the nature of wastewater (which is a complex and dilute matrix), including an examination of sample preparation and NMR techniques (such as solvent suppression), in both the solid and solution states, are discussed. Then, the arsenal of available NMR techniques for both structure elucidation (e.g., heteronuclear, multidimensional NMR, homonuclear scalar coupling-based experiments) and the study of intermolecular interactions (e.g., diffusion, nuclear Overhauser and saturation transfer-based techniques) in wastewater are examined. Examples of wastewater NMR studies from the literature are reviewed and potential areas for future research are identified. Organized by nucleus, this review includes the common heteronuclei (13C, 15N, 19F, 31P, 29Si) as well as other environmentally relevant nuclei and metals such as 27Al, 51V, 207Pb and 113Cd, among others. Further, the potential of additional NMR methods such as comprehensive multiphase NMR, NMR microscopy and hyphenated techniques (for example, LC-SPE-NMR-MS) for advancing the current understanding of wastewater are discussed. In addition, a case study that combines natural abundance (i.e. non-concentrated), targeted and non-targeted NMR to characterize wastewater, along with in vivo based NMR to understand its toxicity, is included. The study demonstrates that, when applied comprehensively, NMR can provide unique insights into not just the structure, but also potential impacts, of wastewater and wastewater treatment processes. Finally, low-field NMR, which holds considerable future potential for on-site wastewater monitoring, is briefly discussed. In summary, NMR spectroscopy is one of the most versatile tools in modern science, with abilities to study all phases (gases, liquids, gels and solids), chemical structures, interactions, interfaces, toxicity and much more. The authors hope this review will inspire more scientists to embrace NMR, given its huge potential for both wastewater analysis in particular and environmental research in general.
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Affiliation(s)
- Maryam Tabatabaei Anaraki
- Environmental NMR Center, University of Toronto Scarborough, 1265 Military Trail, Toronto M1C1A4, Canada
| | - Daniel H Lysak
- Environmental NMR Center, University of Toronto Scarborough, 1265 Military Trail, Toronto M1C1A4, Canada
| | - Katelyn Downey
- Environmental NMR Center, University of Toronto Scarborough, 1265 Military Trail, Toronto M1C1A4, Canada
| | - Flávio Vinicius Crizóstomo Kock
- Environmental NMR Center, University of Toronto Scarborough, 1265 Military Trail, Toronto M1C1A4, Canada; Department of Chemistry, Federal University of São Carlos-SP (UFSCar), São Carlos, SP, Brazil
| | - Xiang You
- Environmental NMR Center, University of Toronto Scarborough, 1265 Military Trail, Toronto M1C1A4, Canada
| | - Rudraksha D Majumdar
- Environmental NMR Center, University of Toronto Scarborough, 1265 Military Trail, Toronto M1C1A4, Canada; Synex Medical, 2 Bloor Street E, Suite 310, Toronto, ON M4W 1A8, Canada
| | - Andersson Barison
- NMR Center, Federal University of Paraná, CP 19081, 81530-900 Curitiba, PR, Brazil
| | - Luciano Morais Lião
- NMR Center, Institute of Chemistry, Universidade Federal de Goiás, Goiânia 74690-900, Brazil
| | | | - Venita Decker
- Bruker Biospin GmbH, Silberstreifen 4, 76287 Rheinstetten, Germany
| | | | - Manfred Spraul
- Bruker Biospin GmbH, Silberstreifen 4, 76287 Rheinstetten, Germany
| | | | - Paul A Helm
- Environmental Monitoring & Reporting Branch, Ontario Ministry of the Environment, Toronto M9P 3V6, Canada
| | - Sonya Kleywegt
- Technical Assessment and Standards Development Branch, Ontario Ministry of the Environment, Conservation and Parks, Toronto, ON M4V 1M2, Canada
| | - Karl Jobst
- Memorial University of Newfoundland, St. John's, NL A1C 5S7, Canada
| | - Ronald Soong
- Environmental NMR Center, University of Toronto Scarborough, 1265 Military Trail, Toronto M1C1A4, Canada
| | - Myrna J Simpson
- Environmental NMR Center, University of Toronto Scarborough, 1265 Military Trail, Toronto M1C1A4, Canada
| | - Andre J Simpson
- Environmental NMR Center, University of Toronto Scarborough, 1265 Military Trail, Toronto M1C1A4, Canada.
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5
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Conformational Dynamics from Ambiguous Zinc Coordination in the RanBP2-Type Zinc Finger of RBM5. J Mol Biol 2020; 432:4127-4138. [PMID: 32450081 DOI: 10.1016/j.jmb.2020.05.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 05/17/2020] [Accepted: 05/18/2020] [Indexed: 11/22/2022]
Abstract
The multi-domain RNA binding protein RBM5 is a molecular signature of metastasis. RBM5 regulates alternative splicing of apoptotic genes including the cell death receptor Fas and the initiator Caspase-2. The RBM5 RanBP2-type zinc finger (Zf1) is known to specifically recognize single-stranded RNAs with high affinity. Here, we study the structure and conformational dynamics of the Zf1 zinc finger of human RBM5 using NMR. We show that the presence of a non-canonical cysteine in Zf1 kinetically destabilizes the protein. Metal-exchange kinetics show that mutation of the cysteine establishes high-affinity coordination of the zinc. Our data indicate that selection of such a structurally destabilizing mutation during the course of evolution could present an opportunity for functional adaptation of the protein.
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6
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Effect of benzoic acid substituents and additional functional groups of ancillary ligands in modulating the nuclearity and aggregation behavior of transition metal carboxylates. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.10.054] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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7
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Chen S, Lucier BEG, Luo W, Xie X, Feng K, Chan H, Terskikh VV, Sun X, Sham TK, Workentin MS, Huang Y. Loading across the Periodic Table: Introducing 14 Different Metal Ions To Enhance Metal-Organic Framework Performance. ACS APPLIED MATERIALS & INTERFACES 2018; 10:30296-30305. [PMID: 30124282 DOI: 10.1021/acsami.8b08496] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Loading metal guests within metal-organic frameworks (MOFs) via secondary functional groups is a promising route for introducing or enhancing MOF performance in various applications. In this work, 14 metal ions (Li+, Na+, K+, Mg2+, Ca2+, Ba2+, Zn2+, Co2+, Mn2+, Ag+, Cd2+, La3+, In3+, and Pb2+) have been successfully introduced within the MIL-121 MOF using a cost-efficient route involving free carboxylic groups on the linker. The local and long-range structure of the metal-loaded MOFs is characterized using multinuclear solid-state NMR and X-ray diffraction methods. Li/Mg/Ca-loaded MIL-121 and Ag nanoparticle-loaded MIL-121 exhibit enhanced H2 and CO2 adsorption; Ag nanoparticle-loaded MIL-121 also demonstrates remarkable catalytic activity in the reduction of 4-nitrophenol.
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Affiliation(s)
- Shoushun Chen
- Department of Chemistry , University of Western Ontario , London , Ontario N6A 5B7 , Canada
| | - Bryan E G Lucier
- Department of Chemistry , University of Western Ontario , London , Ontario N6A 5B7 , Canada
| | - Wilson Luo
- Department of Chemistry , University of Western Ontario , London , Ontario N6A 5B7 , Canada
| | - Xinkai Xie
- Institute of Functional Nano & Soft Materials Laboratory (FUNSOM) & Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices , Soochow University , Jiangsu 215123 , P. R. China
| | - Kun Feng
- Institute of Functional Nano & Soft Materials Laboratory (FUNSOM) & Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices , Soochow University , Jiangsu 215123 , P. R. China
| | - Hendrick Chan
- Department of Chemistry , University of Western Ontario , London , Ontario N6A 5B7 , Canada
| | - Victor V Terskikh
- Department of Chemistry , University of Ottawa , Ottawa , Ontario K1N 6N5 , Canada
| | - Xuhui Sun
- Institute of Functional Nano & Soft Materials Laboratory (FUNSOM) & Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices , Soochow University , Jiangsu 215123 , P. R. China
| | - Tsun-Kong Sham
- Department of Chemistry , University of Western Ontario , London , Ontario N6A 5B7 , Canada
| | - Mark S Workentin
- Department of Chemistry , University of Western Ontario , London , Ontario N6A 5B7 , Canada
| | - Yining Huang
- Department of Chemistry , University of Western Ontario , London , Ontario N6A 5B7 , Canada
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8
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Levchenko TI, Lucier BEG, Corrigan JF, Huang Y. Crystalline Superlattices of Nanoscopic CdS Molecular Clusters: An X-ray Crystallography and 111Cd SSNMR Spectroscopy Study. Inorg Chem 2018; 57:204-217. [PMID: 29243923 DOI: 10.1021/acs.inorgchem.7b02403] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Systematic 111Cd solid-state (SS) NMR experiments were performed to correlate X-ray crystallographic data with SSNMR parameters for a set of CdS-based materials, varying from molecular crystals of small complexes [Cd(SPh)4]2- and [Cd4(SPh)10]2- to superlattices of large monodisperse clusters [Cd54S32(SPh)48(dmf)4]4- and 1.9 nm CdS. Methodical data analysis allowed for assigning individual resonances or resonance groups to particular types of cadmium sites residing in different chemical and/or crystallographic environments. For large CdS frameworks, 111Cd resonances were found to form three groups. This result is noteworthy, since for related systems with size polydispersity and variations in composition, such as CdS or CdSe nanoparticles protected with an organic ligand shell, typically only two groups of resonances were observed. The generalized information obtained in this work can be used for the interpretation of 111/113Cd SSNMR data for large CdS clusters and nanoparticles, for which crystal structure analysis remains inaccessible. Comparison of the powder X-ray diffraction patterns for freshly prepared and dried superlattices of large CdS clusters revealed an interesting superstructure rearrangement that was not observed for the smaller frameworks.
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Affiliation(s)
- Tetyana I Levchenko
- Department of Chemistry and ‡The Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario , London, Ontario N6A 5B7, Canada
| | - Bryan E G Lucier
- Department of Chemistry and ‡The Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario , London, Ontario N6A 5B7, Canada
| | - John F Corrigan
- Department of Chemistry and ‡The Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario , London, Ontario N6A 5B7, Canada
| | - Yining Huang
- Department of Chemistry and ‡The Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario , London, Ontario N6A 5B7, Canada
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9
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Incorporation of second coordination sphere D-amino acids alters Cd(II) geometries in designed thiolate-rich proteins. J Biol Inorg Chem 2017; 23:123-135. [PMID: 29218636 DOI: 10.1007/s00775-017-1515-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Accepted: 11/07/2017] [Indexed: 10/18/2022]
Abstract
We use a de Novo protein design strategy to demonstrate that the second coordination sphere of a metal site plays a key role in controlling coordination geometries of Cd(II)-tris-thiolate complexes. Specifically, we show that alteration of chirality within the core hydrophobic packing region of a three-stranded coiled coil (3SCC) can control the coordination number of Cd(II) by limiting steric encumbrance to the metal center. Within a specific class of 3SCCs [Ac-G-(LKALEEK) n -G-NH2], where n = 4 is TRI and n = 5 is GRAND, one L-Leu may be substituted by L-Cys to generate a planar tris-thiolate array capable of metal binding. In the native peptide containing only the L-configuration of leucine, the three-Cys ligand site leads to a mixture of 3- and 4-coordinate Cd(II). When the L-Leu above (toward the N-terminus) the tris-Cys site is substituted with D-Leu, solely a 3-coordinate structure [Cd(II)S3] was obtained. When D-Leu is located below (toward the C-terminus), a mixture of two coordination geometries, presumably Cd(II)S3O and Cd(II)S3O2, is observed, while substitution with D-Leu both above and below the tris-Cys plane yields a higher percentage of 4-coordinate Cd(II)S3O species. Thus, the use of D-amino acids around a metal's coordination sphere provides a powerful tool for controlling the properties of future designed metalloproteins.
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10
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Maiti BK, Almeida RM, Moura I, Moura JJ. Rubredoxins derivatives: Simple sulphur-rich coordination metal sites and its relevance for biology and chemistry. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.10.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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Ahmad S, Fettouhi M, Roisnel T, Alotaibi MA, Alharthi AI, Malik MR, Ahmad I, Isab AA. Structural diversity in pseudohalide complexes of cadmium(II) with N-methylthiourea (Metu): Polymeric [Cd(Metu)2(NCS)2]n versus monomeric [Cd(Metu)2(CN)2]. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1398824] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Saeed Ahmad
- Department of Chemistry, College of Sciences and Humanities, Prince Sattam bin Abdulaziz University, Al-Kharj, Saudi Arabia
| | - Mohammed Fettouhi
- Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
| | - Thierry Roisnel
- Centre de Diffractométrie X (CDIFX), Institut des Sciences Chimiques de Rennes UMR6226 CNRS – Université de Rennes 1, Rennes Cedex, France
| | - Mshari A. Alotaibi
- Department of Chemistry, College of Sciences and Humanities, Prince Sattam bin Abdulaziz University, Al-Kharj, Saudi Arabia
| | - Abdulrahman I. Alharthi
- Department of Chemistry, College of Sciences and Humanities, Prince Sattam bin Abdulaziz University, Al-Kharj, Saudi Arabia
| | | | - Irshad Ahmad
- Department of Chemistry, Government Gordon College, Rawalpindi, Pakistan
| | - Anvarhusein A. Isab
- Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
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12
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Jabłońska A, Bender J, Gudat D, Ponikiewski Ł, Dołęga A. Comparison of the coordination geometries of Zn(II) and Cd(II) ions in complexes with water, methanol and bulky aryloxysilanethiolate ligands. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.05.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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13
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Frost JM, Kobera L, Pialat A, Zhang Y, Southern SA, Gabidullin B, Bryce DL, Murugesu M. From discrete molecule, to polymer, to MOF: mapping the coordination chemistry of Cd(II) using (113)Cd solid-state NMR. Chem Commun (Camb) 2016; 52:10680-3. [PMID: 27507123 DOI: 10.1039/c6cc04940k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Studies of three related Cd(II) systems (a discrete [Cd(II)2] unit, a one-dimensional [Cd(II)2]n coordination polymer and a Cd(II)-based MOF) all derived from the ligand 2,4,6-tris(2-pyrimidyl)-1,3,5-triazine, reveal an exceptionally rare example of (113)Cd-(113)Cd J coupling in the polymer that is detectable by solid-state NMR ((2)JCd-Cd = ∼65 Hz).
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Affiliation(s)
- Jamie M Frost
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, ON, Canada K1N 6N5.
| | - Libor Kobera
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, ON, Canada K1N 6N5.
| | - Amélie Pialat
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, ON, Canada K1N 6N5.
| | - Yixin Zhang
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, ON, Canada K1N 6N5.
| | - Scott A Southern
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, ON, Canada K1N 6N5.
| | - Bulat Gabidullin
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, ON, Canada K1N 6N5.
| | - David L Bryce
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, ON, Canada K1N 6N5.
| | - Muralee Murugesu
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, ON, Canada K1N 6N5.
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14
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Griffiths K, Kumar P, Mattock JD, Abdul-Sada A, Pitak MB, Coles SJ, Navarro O, Vargas A, Kostakis GE. Efficient NiII2LnIII2 Electrocyclization Catalysts for the Synthesis of trans-4,5-Diaminocyclopent-2-enones from 2-Furaldehyde and Primary or Secondary Amines. Inorg Chem 2016; 55:6988-94. [DOI: 10.1021/acs.inorgchem.6b00720] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kieran Griffiths
- Department
of Chemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QJ, United Kingdom
| | - Prashant Kumar
- Department
of Chemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QJ, United Kingdom
| | - James D. Mattock
- Department
of Chemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QJ, United Kingdom
| | - Alaa Abdul-Sada
- Department
of Chemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QJ, United Kingdom
| | - Mateusz B. Pitak
- UK National
Crystallography Service, Chemistry, University of Southampton, Highfield
Campus, Southampton, SO17
1BJ, United Kingdom
| | - Simon J. Coles
- UK National
Crystallography Service, Chemistry, University of Southampton, Highfield
Campus, Southampton, SO17
1BJ, United Kingdom
| | - Oscar Navarro
- Department
of Chemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QJ, United Kingdom
| | - Alfredo Vargas
- Department
of Chemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QJ, United Kingdom
| | - George E. Kostakis
- Department
of Chemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QJ, United Kingdom
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15
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Chen W, Horike S, Umeyama D, Ogiwara N, Itakura T, Tassel C, Goto Y, Kageyama H, Kitagawa S. Glass Formation of a Coordination Polymer Crystal for Enhanced Proton Conductivity and Material Flexibility. Angew Chem Int Ed Engl 2016; 55:5195-200. [DOI: 10.1002/anie.201600123] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 02/02/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Wenqian Chen
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University Katsura, Nishikyo-ku Kyoto 615–8510 Japan
| | - Satoshi Horike
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University Katsura, Nishikyo-ku Kyoto 615–8510 Japan
| | - Daiki Umeyama
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University Katsura, Nishikyo-ku Kyoto 615–8510 Japan
| | - Naoki Ogiwara
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University Katsura, Nishikyo-ku Kyoto 615–8510 Japan
| | - Tomoya Itakura
- DENSO CORPORATION 1-1 Showa-cho, Kariya Aichi 448–8661 Japan
| | - Cédric Tassel
- Department of Energy and Hydrocarbon Chemistry Graduate School of Engineering Kyoto University Katsura, Nishikyo-ku Kyoto 615–8510 Japan
| | - Yoshihiro Goto
- Department of Energy and Hydrocarbon Chemistry Graduate School of Engineering Kyoto University Katsura, Nishikyo-ku Kyoto 615–8510 Japan
| | - Hiroshi Kageyama
- Department of Energy and Hydrocarbon Chemistry Graduate School of Engineering Kyoto University Katsura, Nishikyo-ku Kyoto 615–8510 Japan
| | - Susumu Kitagawa
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University Katsura, Nishikyo-ku Kyoto 615–8510 Japan
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS) Kyoto University Yoshida, Sakyo-ku Kyoto 606–8501 Japan
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16
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Chen W, Horike S, Umeyama D, Ogiwara N, Itakura T, Tassel C, Goto Y, Kageyama H, Kitagawa S. Glass Formation of a Coordination Polymer Crystal for Enhanced Proton Conductivity and Material Flexibility. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600123] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Wenqian Chen
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University Katsura, Nishikyo-ku Kyoto 615–8510 Japan
| | - Satoshi Horike
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University Katsura, Nishikyo-ku Kyoto 615–8510 Japan
| | - Daiki Umeyama
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University Katsura, Nishikyo-ku Kyoto 615–8510 Japan
| | - Naoki Ogiwara
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University Katsura, Nishikyo-ku Kyoto 615–8510 Japan
| | - Tomoya Itakura
- DENSO CORPORATION 1-1 Showa-cho, Kariya Aichi 448–8661 Japan
| | - Cédric Tassel
- Department of Energy and Hydrocarbon Chemistry Graduate School of Engineering Kyoto University Katsura, Nishikyo-ku Kyoto 615–8510 Japan
| | - Yoshihiro Goto
- Department of Energy and Hydrocarbon Chemistry Graduate School of Engineering Kyoto University Katsura, Nishikyo-ku Kyoto 615–8510 Japan
| | - Hiroshi Kageyama
- Department of Energy and Hydrocarbon Chemistry Graduate School of Engineering Kyoto University Katsura, Nishikyo-ku Kyoto 615–8510 Japan
| | - Susumu Kitagawa
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University Katsura, Nishikyo-ku Kyoto 615–8510 Japan
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS) Kyoto University Yoshida, Sakyo-ku Kyoto 606–8501 Japan
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17
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Griffiths K, Dokorou VN, Spencer J, Abdul-Sada A, Vargas A, Kostakis GE. Isoskeletal Schiff base polynuclear coordination clusters: synthetic and theoretical aspects. CrystEngComm 2016. [DOI: 10.1039/c5ce02109j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
This work addresses and enlightens synthetic aspects derived from our effort to systematically construct isoskeletal tetranuclear coordination clusters (CCs) of the general formula [TR2Ln2(LX)4(NO3)2(solv)2] possessing a specific defected dicubane topology.
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Affiliation(s)
- Kieran Griffiths
- Department of Chemistry
- School of Life Sciences
- University of Sussex
- Brighton BN1 9QJ, UK
| | - Vassiliki N. Dokorou
- Department of Chemistry
- School of Life Sciences
- University of Sussex
- Brighton BN1 9QJ, UK
| | - John Spencer
- Department of Chemistry
- School of Life Sciences
- University of Sussex
- Brighton BN1 9QJ, UK
| | - Alaa Abdul-Sada
- Department of Chemistry
- School of Life Sciences
- University of Sussex
- Brighton BN1 9QJ, UK
| | - Alfredo Vargas
- Department of Chemistry
- School of Life Sciences
- University of Sussex
- Brighton BN1 9QJ, UK
| | - George E. Kostakis
- Department of Chemistry
- School of Life Sciences
- University of Sussex
- Brighton BN1 9QJ, UK
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18
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Baxter EF, Bennett TD, Cairns AB, Brownbill NJ, Goodwin AL, Keen DA, Chater PA, Blanc F, Cheetham AK. A comparison of the amorphization of zeolitic imidazolate frameworks (ZIFs) and aluminosilicate zeolites by ball-milling. Dalton Trans 2016; 45:4258-68. [DOI: 10.1039/c5dt03477a] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Amorphization of zeolitic imidazolate frameworks during ball-milling is much more rapid than that of aluminosilicate zeolites.
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Affiliation(s)
- Emma F. Baxter
- Department of Materials Science and Metallurgy
- University of Cambridge
- Cambridge
- UK
| | - Thomas D. Bennett
- Department of Materials Science and Metallurgy
- University of Cambridge
- Cambridge
- UK
| | - Andrew B. Cairns
- Inorganic Chemistry Laboratory
- Department of Chemistry
- University of Oxford
- Oxford OX1 3QR
- UK
| | - Nick J. Brownbill
- Department of Chemistry and Stephenson Institute for Renewable Energy
- University of Liverpool
- Liverpool
- UK
| | - Andrew L. Goodwin
- Inorganic Chemistry Laboratory
- Department of Chemistry
- University of Oxford
- Oxford OX1 3QR
- UK
| | | | - Philip A. Chater
- Diamond Light Source Ltd
- Diamond House
- Harwell Science & Innovation Campus
- Oxfordshire, OX11 0DE
- UK
| | - Frédéric Blanc
- Department of Chemistry and Stephenson Institute for Renewable Energy
- University of Liverpool
- Liverpool
- UK
| | - Anthony K. Cheetham
- Department of Materials Science and Metallurgy
- University of Cambridge
- Cambridge
- UK
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19
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Saxena P, Thirupathi N. Reactions of Cd(OAc)2·2H2O with variously substituted pyridines. Efforts to unravel the factors that determine structure/nuclearity of the products. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.06.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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20
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Kuttatheyil AV, Handke M, Bergmann J, Lässig D, Lincke J, Haase J, Bertmer M, Krautscheid H. 113Cd Solid-State NMR for Probing the Coordination Sphere in Metal-Organic Frameworks. Chemistry 2014; 21:1118-24. [DOI: 10.1002/chem.201405395] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Indexed: 11/12/2022]
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21
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Safin DA, Babashkina MG, Kubisiak P, Mitoraj MP, Le Duff CS, Robeyns K, Garcia Y. Supramolecular Coordination Complexes of theN-Thiophosphorylated 2,5-Dithiobiurea [NHC(S)NHP(S)(OiPr)2]2with ZnIIand CdIIIons - Cation-Induced Dinuclear Mesocate Structure versus Tetranuclear Nanoscaled Aggregate. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402544] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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22
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23
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Le Gac S, Fusaro L, Roisnel T, Boitrel B. Heterobimetallic Porphyrin Complexes Displaying Triple Dynamics: Coupled Metal Motions Controlled by Constitutional Evolution. J Am Chem Soc 2014; 136:6698-715. [DOI: 10.1021/ja501926f] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Stéphane Le Gac
- UMR
CNRS 6226, Institut des Sciences Chimiques de Rennes, Université de Rennes 1, 263 Avenue du Général Leclerc, 35042 Rennes Cedex, France
| | - Luca Fusaro
- Laboratoire
de RMN Haute Résolution, Université Libre de Bruxelles, CP
160/08, 50 Avenue F.-D. Roosevelt, B-1050, Bruxelles, Belgium
| | - Thierry Roisnel
- UMR
CNRS 6226, Institut des Sciences Chimiques de Rennes, Université de Rennes 1, 263 Avenue du Général Leclerc, 35042 Rennes Cedex, France
| | - Bernard Boitrel
- UMR
CNRS 6226, Institut des Sciences Chimiques de Rennes, Université de Rennes 1, 263 Avenue du Général Leclerc, 35042 Rennes Cedex, France
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24
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Sharma RK, Wadawale A, Kedarnath G, Vishwanadh B, Jain VK. Pyrimidyl-2-selenolates of cadmium and mercury: Synthesis, characterization, structures and their conversion to metal selenide nano-particles. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2013.11.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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25
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García-Rodríguez R, Liu H. Mechanistic insights into the role of alkylamine in the synthesis of CdSe nanocrystals. J Am Chem Soc 2014; 136:1968-75. [PMID: 24450484 DOI: 10.1021/ja4110182] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This paper reports a detailed mechanistic study of the effect of alkylamine on the synthesis of CdSe nanocrystals. Alkylamines are one of the most important additives for the synthesis of colloidal semiconductor nanocrystals. However, their effect on the monomer production as well as nanocrystal nucleation and growth are not well understood, as indicted by inconsistent and contradictory conclusions in the literature. We found that alkylamines slow down the reaction between cadmium oleate and trialkyl phosphine selenide by binding to cadmium and preventing the activation of trialkyl phosphine selenide. A linear correlation was observed between the observed reaction rate constant and the (31)P NMR chemical shift or (1)J(P-Se) of phosphine selenide. In the presence of alkylamine, an alkylaminophosphonium intermediate was observed. Mechanistic study suggests that the cleavage of P═Se bond is through nucleophilic attack by carboxylate instead of alkylamine. Interestingly, although alkylamines decrease the rate of monomer production, it increases the rate of CdSe nanocrystal growth. Although seemingly contradictory, this is due to a drastic decrease in the nanocrystal nucleation events in the presence of alkylamines. As a result, each nucleus is fed with more monomers and grows faster in the presence of alkylamine than in its absence.
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Affiliation(s)
- Raúl García-Rodríguez
- Department of Chemistry, University of Pittsburgh , Pittsburgh, Pennsylvania 15260, United States
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26
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Hsu W, Chen KT, Li YS, Cheng PW, Chen TR, Chen JD. Crystal-to-crystal transformations and photoluminescence changes in the Cu( i) coordination networks based on a formamidinate ligand. CrystEngComm 2014. [DOI: 10.1039/c4ce01791a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
While the syn-complexes show broad emission bands, those of the anti-complexes are not detectable, indicating that cuprophilicity is unlikely to play a significant role in determining the emission.
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Affiliation(s)
- Wayne Hsu
- Department of Chemistry
- Chung Yuan Christian University
- Chung-Li, Taiwan
| | - Kuan-Ting Chen
- Department of Chemistry
- Chung Yuan Christian University
- Chung-Li, Taiwan
| | - Yu-Sian Li
- Department of Chemistry
- Chung Yuan Christian University
- Chung-Li, Taiwan
| | - Po-Wen Cheng
- Department of Chemistry
- Chung Yuan Christian University
- Chung-Li, Taiwan
| | - Tsun-Ren Chen
- Department of Applied Chemistry
- National Pingtung University
- Ping-Tung, Taiwan
| | - Jhy-Der Chen
- Department of Chemistry
- Chung Yuan Christian University
- Chung-Li, Taiwan
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27
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Banerjee S, Rajakannu P, Butcher RJ, Murugavel R. Auxiliary ligand-aided tuning of aggregation of transition metal benzoates: isolation of four different types of coordination polymers. CrystEngComm 2014. [DOI: 10.1039/c4ce01043d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The position of benzoic acid substituents and the ability of the auxiliary ligand to act as a chelating or a bridging ligand drive metal benzoates to assemble either as discrete or as polymeric complexes.
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Affiliation(s)
- Subarna Banerjee
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400 076, India
| | - Palanisamy Rajakannu
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400 076, India
| | | | - Ramaswamy Murugavel
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400 076, India
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28
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Moreno-Alcántar G, Arroyo M, Bautista JL, Bernès S, Esturau-Escofet N, Torrens H. Polyfluorinated mercury thiolates. 199Hg NMR studies and the crystal structure of [Hg(SC6H4(CF3)-2)2]. J Fluor Chem 2013. [DOI: 10.1016/j.jfluchem.2013.09.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Daumann LJ, Schenk G, Ollis DL, Gahan LR. Spectroscopic and mechanistic studies of dinuclear metallohydrolases and their biomimetic complexes. Dalton Trans 2013; 43:910-28. [PMID: 24135968 DOI: 10.1039/c3dt52287c] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An enhanced understanding of the metal ion binding and active site structural features of phosphoesterases such as the glycerophosphodiesterase from Enterobacter aerogenes (GpdQ), and the organophosphate degrading agent from Agrobacterium radiobacter (OpdA) have important consequences for potential applications. Coupled with investigations of the metalloenzymes, programs of study to synthesise and characterise model complexes based on these metalloenzymes can add to our understanding of structure and function of the enzymes themselves. This review summarises some of our work and illustrates the significance and contributions of model studies to knowledge in the area.
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Affiliation(s)
- Lena J Daumann
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia.
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30
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Le Gac S, Fusaro L, Dorcet V, Boitrel B. Formation and Dynamic Behavior of Mono- and Bimetallic Cadmium(II) Porphyrin Complexes: Allosteric Control of Coupled Intraligand Metal Migrations. Chemistry 2013; 19:13376-86. [DOI: 10.1002/chem.201302178] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Indexed: 11/10/2022]
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31
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Non-covalently aggregated zinc and cadmium complexes derived from substituted aromatic carboxylic acids: Synthesis, spectroscopy, and structural studies. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2013.04.021] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Abstract
Lectins are proteins of non-immune origin that bind specific carbohydrates without chemical modification. Coupled with the emerging biological and pathological significance of carbohydrates, lectins have become extensively used as research tools in glycobiology. However, lectin-based drug development has been impeded by high manufacturing costs, low chemical stability, and the potential risk of initiating an unfavorable immune response. As alternatives to lectins, non-protein small molecules having carbohydrate-binding properties (lectin mimics) are currently attracting a great deal of attention because of their ease of preparation and chemical modification. Lectin mimics of synthetic origin are divided roughly into two groups, boronic acid-dependent and boronic acid-independent lectin mimics. This article outlines their representative architectures and carbohydrate-binding properties, and discusses their therapeutic potential by reviewing recent attempts to develop antiviral and antimicrobial agents using their architectures. We also focus on the naturally occurring lectin mimics, pradimicins and benanomicins. They are the only class of non-protein natural products having a C-type lectin-like ability to recognize d-mannopyranosides in the presence of Ca2 + ions. Their molecular basis of carbohydrate recognition and therapeutic potential are also discussed.
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Affiliation(s)
- Yu Nakagawa
- Synthetic Cellular Chemistry Laboratory, RIKEN Advanced Science Institute, Wako, Saitama, Japan
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33
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Hegemann C, Tyrra W, Neudörfl JM, Mathur S. Synthetic and Structural Investigations on the Reactivity of the Cd–I Bond in [ICd{Zr2(OPri)9}] to Construct New Mixed-Metal Alkoxides. Organometallics 2013. [DOI: 10.1021/om301053b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Corinna Hegemann
- Institute
of Inorganic Chemistry and ‡Institute of Organic
Chemistry, Department of Chemistry, University of Cologne, Greinstrasse 6, 50939 Cologne, Germany
| | - Wieland Tyrra
- Institute
of Inorganic Chemistry and ‡Institute of Organic
Chemistry, Department of Chemistry, University of Cologne, Greinstrasse 6, 50939 Cologne, Germany
| | - Jörg-Martin Neudörfl
- Institute
of Inorganic Chemistry and ‡Institute of Organic
Chemistry, Department of Chemistry, University of Cologne, Greinstrasse 6, 50939 Cologne, Germany
| | - Sanjay Mathur
- Institute
of Inorganic Chemistry and ‡Institute of Organic
Chemistry, Department of Chemistry, University of Cologne, Greinstrasse 6, 50939 Cologne, Germany
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34
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Reany O, Fuchs B. Lateral cis-1,3,5,7-tetraazadecalin podands and their complexes: synthesis, structure, and strong binding with Pb(II) and other heavy metal ions. Inorg Chem 2013; 52:1976-90. [PMID: 23360511 DOI: 10.1021/ic3023166] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The chemistry and complexation behavior of diaminal podands based on cis-1,3,5,7-tetraazadecalin (cis-TAD) were elaborated, reassessed, and extended. The synthesis of 2,6-bis(hydroxymethylene)-cis-TAD (9) and 2,6-bis(α,α'-dimethyl-β- hydroxyethyl)-cis-TAD (10) as well as of suitably substituted 2,6-diaryl-cis-TAD podands is laid out. For the latter, the effect of electron donating or withdrawing substituents on the benzaldehyde reagents was examined while 9 and 10 were probed and showed considerable propensity for heavy metal-ion chelation. The [Cd(II)·(9)] and [Pb(II)·(9)] complexes stood out indeed, and their structure and properties show a particularly interesting 5-amino-1,3-diazane chelation type and strong ligand-ion binding mode, with intramolecular donor exchange in solution, all strongly influenced by the anomeric effect in the ligand.
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Affiliation(s)
- Ofer Reany
- School of Chemistry, Tel-Aviv University, Ramat-Aviv, 69978 Tel-Aviv, Israel.
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35
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Blindauer CA. Lessons on the critical interplay between zinc binding and protein structure and dynamics. J Inorg Biochem 2013; 121:145-55. [PMID: 23376625 DOI: 10.1016/j.jinorgbio.2013.01.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2012] [Revised: 01/08/2013] [Accepted: 01/08/2013] [Indexed: 02/05/2023]
Abstract
Zinc is one of the most important micronutrients for virtually all living organisms, and hence, it is important to understand the molecular mechanisms for its homeostasis. Besides proteins involved in transmembrane transport, both extra- and intracellular zinc-binding proteins play important roles in the respective metabolic networks. Important examples for extracellular zinc transporters are mammalian serum albumins, and for intracellular zinc handling, certain metallothioneins are of relevance. The availability of protein structures including relevant metal binding sites is a fundamental prerequisite to decipher the mechanisms that govern zinc binding dynamics in these proteins, but their determination can prove to be surprisingly challenging. Due to the spectroscopic silence of Zn(2+), combinations of biophysical techniques including electrospray ionisation mass spectrometry (ESI-MS) and multinuclear NMR, isothermal titration calorimetry (ITC) and extended X-ray absorption fine structure (EXAFS) spectroscopy, coupled with site-directed mutagenesis and molecular modelling have proven to be valuable approaches to understand not only the zinc-binding properties of metallothioneins and albumins, but also the influence of other physiologically relevant competing agents. These studies have demonstrated why the bacterial metallothionein SmtA contains a site inert towards exchange with Cd(2+), why the plant metallothionein EC from wheat is partially unfolded in the presence of Cd(2+), and how fatty acids impact on the zinc-binding ability of mammalian serum albumins.
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36
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Abstract
This chapter describes an approach using designed proteins to understand the structure, spectroscopy, and dynamics of proteins that bind Cd(II). We will show that three-stranded coiled coils (3SCCs) based on the parent peptides TRI (Ac-G(LKALEEK)(4)G-NH(2)) or GRAND (Ac-G(LKALEEK)(5)G-NH(2)) have been essential for understanding how Cd(II) binds to thiolate-rich environments in proteins. Examples are given correlating physical properties such as the binding constants or deprotonation constants relating to structure. We present a scale that relates (113)Cd NMR chemical shifts to structures extracted from (111m)Cd PAC experiments. In addition, we describe motional processes that help transport from the helical interface of proteins into the hydrophobic interior of helical bundles. These studies help clarify the chemistry of Cd(II) in relation to metal-regulated gene expression and detoxification.
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37
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Armitage IM, Drakenberg T, Reilly B. Use of (113)Cd NMR to probe the native metal binding sites in metalloproteins: an overview. Met Ions Life Sci 2013; 11:117-44. [PMID: 23430773 PMCID: PMC5245840 DOI: 10.1007/978-94-007-5179-8_6] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Our laboratories have actively published in this area for several years and the objective of this chapter is to present as comprehensive an overview as possible. Following a brief review of the basic principles associated with (113)Cd NMR methods, we will present the results from a thorough literature search for (113)Cd chemical shifts from metalloproteins. The updated (113)Cd chemical shift figure in this chapter will further illustrate the excellent correlation of the (113)Cd chemical shift with the nature of the coordinating ligands (N, O, S) and coordination number/geometry, reaffirming how this method can be used not only to identify the nature of the protein ligands in uncharacterized cases but also the dynamics at the metal binding site. Specific examples will be drawn from studies on alkaline phosphatase, Ca(2+) binding proteins, and metallothioneins.In the case of Escherichia coli alkaline phosphatase, a dimeric zinc metalloenzyme where a total of six metal ions (three per monomer) are involved directly or indirectly in providing the enzyme with maximal catalytic activity and structural stability, (113)Cd NMR, in conjunction with (13)C and (31)P NMR methods, were instrumental in separating out the function of each class of metal binding sites. Perhaps most importantly, these studies revealed the chemical basis for negative cooperativity that had been reported for this enzyme under metal deficient conditions. Also noteworthy was the fact that these NMR studies preceded the availability of the X-ray crystal structure.In the case of the calcium binding proteins, we will focus on two proteins: calbindin D(9k) and calmodulin. For calbindin D(9k) and its mutants, (113)Cd NMR has been useful both to follow actual changes in the metal binding sites and the cooperativity in the metal binding. Ligand binding to calmodulin has been studied extensively with (113)Cd NMR showing that the metal binding sites are not directly involved in the ligand binding. The (113)Cd chemical shifts are, however, exquisitely sensitive to minute changes in the metal ion environment.In the case of metallothionein, we will reflect upon how (113)Cd substitution and the establishment of specific Cd to Cys residue connectivity by proton-detected heteronuclear (1)H-(113)Cd multiple-quantum coherence methods (HMQC) was essential for the initial establishment of the 3D structure of metallothioneins, a protein family deficient in the regular secondary structural elements of α-helix and β-sheet and the first native protein identified with bound Cd. The (113)Cd NMR studies also enabled the characterization of the affinity of the individual sites for (113)Cd and, in competition experiments, for other divalent metal ions: Zn, Cu, and Hg.
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Affiliation(s)
- Ian M Armitage
- Department of Biochemistry, University of Minnesota, Minneapolis, MN 55455, USA.
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38
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Calatayud DG, López-Torres E, Mendiola MA. A Fluorescent Dissymmetric Thiosemicarbazone Ligand Containing a Hydrazonequinoline Arm and Its Complexes with Cadmium and Mercury. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200815] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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39
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Dokorou VN, Milios CJ, Tsipis AC, Haukka M, Weidler PG, Powell AK, Kostakis GE. Pseudopeptidic ligands: exploring the self-assembly of isophthaloylbisglycine (H2IBG) and divalent metal ions. Dalton Trans 2012; 41:12501-13. [PMID: 22955234 DOI: 10.1039/c2dt31383a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present a systematic study of the complexation of the new pseudopeptidic ligand isophthaloylbisglycine (H(2)IBG) with divalent metal ions of varying ionic radius. This work represents the initial employment of H(2)IBG in the coordination chemistry of alkaline earth, 3d transition, Zn(II) and Cd(II) metal elements. Infrared, NMR, thermal, magnetic, adsorption and theoretical studies of these compounds are also discussed.
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Affiliation(s)
- Vassiliki N Dokorou
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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40
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Jalilehvand F, Amini Z, Parmar K. Cadmium(II) complex formation with selenourea and thiourea in solution: an XAS and 113Cd NMR study. Inorg Chem 2012; 51:10619-30. [PMID: 23016594 PMCID: PMC3498765 DOI: 10.1021/ic300852t] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The complexes formed in methanol solutions of Cd(CF(3)SO(3))(2) with selenourea (SeU) or thiourea (TU), for thiourea also in aqueous solution, were studied by combining (113)Cd NMR and X-ray absorption spectroscopy. At low temperature (~200 K), distinct (113)Cd NMR signals were observed, corresponding to CdL(n)(2+) species (n = 0-4, L = TU or SeU) in slow ligand exchange. Peak integrals were used to obtain the speciation in the methanol solutions, allowing stability constants to be estimated. For cadmium(II) complexes with thione (C═S) or selone (C═Se) groups coordinated in Cd(S/Se)O(5) or Cd(S/Se)(2)O(4) (O from MeOH or CF(3)SO(3)(-)) environments, the (113)Cd chemical shifts were quite similar, within 93-97 ppm and 189-193 ppm, respectively. However, the difference in the chemical shift for the Cd(SeU)(4)(2+) (578 pm) and Cd(TU)(4)(2+) (526 ppm) species, with CdSe(4) and CdS(4) coordination, respectively, shows less chemical shielding for the coordinated Se atoms than for S, in contrast to the common trend with increasing shielding in the following order: O > N > Se > S. In solutions dominated by mono- and tetra-thiourea/selenourea complexes, their coordination and bond distances could be evaluated by Cd K-edge extended X-ray absorption fine structure (EXAFS) spectroscopy. At ~200 K and high excess of thiourea, a minor amount (up to ~30%) of [Cd(TU)(5-6)](2+) species was detected by an upfield shift of the (113)Cd NMR signal (up to 423 ppm) and an amplitude reduction of the EXAFS oscillation. The amount was estimated by fitting linear combinations of simulated EXAFS spectra for [Cd(TU)(4)](2+) and [Cd(TU)(6)](2+) complexes. At room temperature, [Cd(TU)(4)](2+) was the highest complex formed, also in aqueous solution. Cd L(3)-edge X-ray absorption near edge structure (XANES) spectra of cadmium(II) thiourea solutions in methanol were used to follow changes in the CdS(x)O(y) coordination. The correlations found from the current and previous studies between (113)Cd NMR chemical shifts and different Cd(II) coordination environments are generally useful for evaluating cadmium coordination to thione-containing or Se-donor ligands in biochemical systems or for monitoring speciation in solution.
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Affiliation(s)
- Farideh Jalilehvand
- Department of Chemistry, University of Calgary, Calgary, AB, Canada T2N 1N4.
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Nami SAA, Alam M, Husain A, Parveen M. Synthesis, characterization, thermal and antioxidant studies of potassium dihydrobisphenothiazinyl borate and its transition metal complexes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 96:729-735. [PMID: 22885087 DOI: 10.1016/j.saa.2012.07.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2012] [Revised: 06/30/2012] [Accepted: 07/10/2012] [Indexed: 06/01/2023]
Abstract
The bidentate borate anion H(2)B(ptz)(2)(-) and its transition metal complexes have been synthesized and characterized by elemental analyses, magnetic susceptibility, electronic, IR, (1)H and (13)C NMR data. The molar conductance of 10(-3) M solution for all the complexes supports their non-ionic nature. The TGA profile of borate anion shows a single stage unlike that of two stage decomposition plot of the metal complexes. On the basis of spectroscopic studies the geometry of all the complexes have been proposed to be distorted-tetrahedral. The in vitro antioxidant and lipid oxidation inhibition of the ligand and its complexes have also been studied. The Cu[B(ptz)(2)](2) complex was found to be most effective in all the studies.
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Affiliation(s)
- Shahab A A Nami
- Department of Kulliyat, Faculty of Unani Medicine, Aligarh Muslim University, Aligarh 202002, India.
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Maiti BK, Avilés T, Matzapetakis M, Moura I, Pauleta SR, Moura JJG. Synthesis of [MoS
4
]
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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Pathak RK, Hinge VK, Mahesh K, Rai A, Panda D, Rao CP. Cd2+ complex of a triazole-based calix[4]arene conjugate as a selective fluorescent chemosensor for Cys. Anal Chem 2012; 84:6907-13. [PMID: 22834792 DOI: 10.1021/ac301492h] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
An N,N-Dimethylamine ethylimino-appended triazole-linked calix[4]arene conjugate, L, has been synthesized and characterized, and its Cd(2+) complex has been isolated and characterized. The structure of [CdL] was established by computational calculation using B3LYP/LANL2DZ. Time-dependent density functional theory calculations were performed to demonstrate the electronic properties of [CdL]. This highly fluorescing [CdL] has been used to recognize Cys selectively among the 20 naturally occurring amino acids. [CdL] exhibits a minimum detection limit of 58 ppb for Cys, with reusability and reversibility being imparted to the system during sensing. Thus, the sensing of Cys was well demonstrated using various techniques, viz., fluorescence, absorption, visual color change, electrospray ionization MS, (1)H NMR, and live cell imaging experiments.
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Affiliation(s)
- Rakesh K Pathak
- Bioinorganic Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India
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Chakraborty S, Iranzo O, Zuiderweg ERP, Pecoraro VL. Experimental and theoretical evaluation of multisite cadmium(II) exchange in designed three-stranded coiled-coil peptides. J Am Chem Soc 2012; 134:6191-203. [PMID: 22394049 DOI: 10.1021/ja210510g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
An important factor that defines the toxicity of elements such as cadmium(II), mercury(II), and lead(II) with biological macromolecules is metal ion exchange dynamics. Intriguingly, little is known about the fundamental rates and mechanisms of metal ion exchange into proteins, especially helical bundles. Herein, we investigate the exchange kinetics of Cd(II) using de novo designed three-stranded coiled-coil peptides that contain metal complexing cysteine thiolates as a model for the incorporation of this ion into trimeric, parallel coiled coils. Peptides were designed containing both a single Cd(II) binding site, GrandL12AL16C [Grand = AcG-(LKALEEK)(5)-GNH(2)], GrandL26AL30C, and GrandL26AE28QL30C, as well as GrandL12AL16CL26AL30C with two Cd(II) binding sites. The binding of Cd(II) to any of these sites is of high affinity (K(A) > 3 × 10(7) M(-1)). Using (113)Cd NMR spectroscopy, Cd(II) binding to these designed peptides was monitored. While the Cd(II) binding is in extreme slow exchange regime without showing any chemical shift changes, incremental line broadening for the bound (113)Cd(II) signal is observed when excess (113)Cd(II) is titrated into the peptides. Most dramatically, for one site, L26AL30C, all (113)Cd(II) NMR signals disappear once a 1.7:1 ratio of Cd(II)/(peptide)(3) is reached. The observed processes are not compatible with a simple "free-bound" two-site exchange kinetics at any time regime. The experimental results can, however, be simulated in detail with a multisite binding model, which features additional Cd(II) binding site(s) which, once occupied, perturb the primary binding site. This model is expanded into differential equations for five-site NMR chemical exchange. The numerical integration of these equations exhibits progressive loss of the primary site NMR signal without a chemical shift change and with limited line broadening, in good agreement with the observed experimental data. The mathematical model is interpreted in molecular terms as representing binding of excess Cd(II) to surface Glu residues located at the helical interfaces. In the absence of Cd(II), the Glu residues stabilize the three-helical structure though salt bridge interactions with surface Lys residues. We hypothesize that Cd(II) interferes with these surface ion pairs, destabilizing the helical structure, and perturbing the primary Cd(II) binding site. This hypothesis is supported by the observation that the Cd(II)-excess line broadening is attenuated in GrandL26AE28QL30C, where a surface Glu(28), close to the metal binding site, was changed to Gln. The external binding site may function as an entry pathway for Cd(II) to find its internal binding site following a molecular rearrangement which may serve as a basis for our understanding of metal complexation, transport, and exchange in complex native systems containing α-helical bundles.
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Affiliation(s)
- Saumen Chakraborty
- Department of Chemistry, University of Michigan, University of Michigan Medical School, Ann Arbor, Michigan 48109, USA
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Calatayud DG, López-Torres E, Dilworth JR, Antonia Mendiola M. Complexes of group 12 metals containing a hybrid thiosemicarbazone-pyridylhydrazone ligand. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2011.10.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Romero MJ, Pedrido R, González-Noya AM, Maneiro M, Fernández-García MI, Zaragoza G, Bermejo MR. Versatile coordination behaviour of an asymmetric half-salen ligand bearing a dansyl fluorophore. Dalton Trans 2012; 41:10832-44. [DOI: 10.1039/c2dt31093g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Nakagawa Y, Doi T, Takegoshi K, Igarashi Y, Ito Y. Solid-state NMR analysis of calcium and d-mannose binding of BMY-28864, a water-soluble analogue of pradimicin A. Bioorg Med Chem Lett 2012; 22:1040-3. [DOI: 10.1016/j.bmcl.2011.11.106] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2011] [Revised: 11/24/2011] [Accepted: 11/28/2011] [Indexed: 11/17/2022]
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Jancsó A, Szunyogh D, Larsen FH, Thulstrup PW, Christensen NJ, Gyurcsik B, Hemmingsen L. Towards the role of metal ions in the structural variability of proteins: CdII speciation of a metal ion binding loop motif. Metallomics 2011; 3:1331-9. [PMID: 22041892 DOI: 10.1039/c1mt00138h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A de novo designed dodecapeptide (HS), inspired by the metal binding loops of metal-responsive transcriptional activators, was synthesized. The aim was to create a model system for structurally promiscuous and intrinsically unstructured proteins, and explore the effect of metal ions on their structure and dynamics. The interaction with Cd(II) was investigated by UV, synchrotron radiation CD, (1)H NMR, and perturbed angular correlation (PAC) of γ-rays spectroscopy, pH-potentiometry, and molecular modelling. The peptide mainly displays characteristics of random coil in the CD spectra, and the molecular dynamics simulations demonstrate that it is unstructured with transient and varying helical content. The spectroscopic studies revealed the formation of loop structures with the coordination of the two Cys-thiolates close to each end of the HS peptide, in the presence of one equivalent of Cd(II) per ligand. The imidazole moiety from histidine is also bound to Cd(II) at neutral pH and above. In the presence of 0.5 equivalent of Cd(II) per HS metal bridged structures with e.g. CdS(2)N(2) and possibly CdS(4) coordination geometries are formed above pH ~6. In an equilibrium of several co-existing species the peptide is exchanging between a number of structures also in its metal ion bound state(s), as indicated by NMR and PAC data.
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Affiliation(s)
- Attila Jancsó
- Department of Inorganic and Analytical Chemistry, University of Szeged, Szeged, Hungary.
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Examining the impact of steric and electronic variation in N2S scorpionate ligands on the properties of zinc(II) and cadmium(II) complexes. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.07.033] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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50
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Dey SK, Shit S, Dey SP, Mitra S, Malik KMA. First Report on Thermally Stable Cadmium Carbonyl Complex Containing an Interesting Chloroaryl Bridge: Isolation and Characterization. CHEM LETT 2011. [DOI: 10.1246/cl.2011.810] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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