1
|
New Rh(III) chloro complex of a tetradentate S-picolyl azo ligand of acetyl acetone: Synthesis, X-ray structure, spectral characterization, electrochemistry, DFT computation and interaction with DNA. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
2
|
Mondal AS, Naskar R, Manna CK, Mondal TK. Manganese(II) complex with ONS donor redox non-innocent azo-thioether pincer ligand: synthesis, X-ray structure, electrochemistry and DFT computation. J CHEM SCI 2022. [DOI: 10.1007/s12039-022-02080-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
|
3
|
Al-Noaimi M, Qnais E, Awwadi FF, Alwahsh MI. Synthesis, X-ray structure, spectroscopic electrochemistry, anti-nociceptive activity and DFT study of cis-[Ru(EPh3)(L)Cl2] complexes (E = P, as and Sb) (L = thioether-azoimine tridentate SNN donor ligands). Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115195] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
4
|
Bjelogrlić S, Todorović TR, Cvijetić I, Rodić MV, Vujčić M, Marković S, Araškov J, Janović B, Emhemmed F, Muller CD, Filipović NR. A novel binuclear hydrazone-based Cd(II) complex is a strong pro-apoptotic inducer with significant activity against 2D and 3D pancreatic cancer stem cells. J Inorg Biochem 2018; 190:45-66. [PMID: 30352315 DOI: 10.1016/j.jinorgbio.2018.10.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 09/16/2018] [Accepted: 10/03/2018] [Indexed: 11/29/2022]
Abstract
A novel binuclear Cd complex (1) with hydrazone-based ligand was prepared and characterized by spectroscopy and single crystal X-ray diffraction techniques. Complex 1 reveals a strong pro-apoptotic activity in both human, mammary adenocarcinoma cells (MCF-7) and pancreatic AsPC-1 cancer stem cells (CSCs). While apoptosis undergoes mostly caspase-independent, 1 stimulates the activation of intrinsic pathway with noteworthy down regulation of caspase-8 activity in respect to non-treated controls. Distribution of cells over mitotic division indicates that 1 caused DNA damage in both cell lines, which is confirmed in DNA interaction studies. Compared to 1, cisplatin (CDDP) does not achieve cell death in 2D cultured AsPC-1 cells, while induces different pattern of cell cycle changes and caspase activation in 2D cultured MCF-7 cells, implying that these two compounds do not share similar mechanism of action. Additionally, 1 acts as a powerful inducer of mitochondrial superoxide production with dissipated trans-membrane potential in the majority of the treated cells already after 6 h of incubation. On 3D tumors, 1 displays a superior activity against CSC model, and at 100 μM induces disintegration of spheroids within 2 days of incubation. Fluorescence spectroscopy, along with molecular docking show that compound 1 binds to the minor groove of DNA. Compound 1 binds to the human serum albumin (HSA) showing that the HSA can effectively transport and store 1 in the human body. Thus, our current study strongly supports further investigations on antitumor activity of 1 as a drug candidate for the treatment of highly resistant pancreatic cancer.
Collapse
Affiliation(s)
- Snežana Bjelogrlić
- National Cancer Research Center of Serbia, Pasterova 14, Belgrade, Serbia; Institut Pluridisciplinaire Hubert Curien, UMR 7178 CNRS Université de Strasbourg, 67401 Illkirch, France
| | - Tamara R Todorović
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, Belgrade, Serbia
| | - Ilija Cvijetić
- Innovation Center of the Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, Belgrade, Serbia
| | - Marko V Rodić
- Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, Novi Sad, Serbia
| | - Miroslava Vujčić
- Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, Belgrade, Serbia
| | - Sanja Marković
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, Belgrade, Serbia
| | - Jovana Araškov
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, Belgrade, Serbia
| | - Barbara Janović
- Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, Belgrade, Serbia
| | - Fathi Emhemmed
- Institut Pluridisciplinaire Hubert Curien, UMR 7178 CNRS Université de Strasbourg, 67401 Illkirch, France
| | - Christian D Muller
- Institut Pluridisciplinaire Hubert Curien, UMR 7178 CNRS Université de Strasbourg, 67401 Illkirch, France
| | - Nenad R Filipović
- Faculty of Agriculture, University of Belgrade, Nemanjina 6, Belgrade, Serbia.
| |
Collapse
|
5
|
Synthesis of a zinc(II) complex with hexadentate N 4 S 2 donor thioether ligand: X-ray structure, DNA binding study and DFT computation. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.03.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
6
|
An octahedral nickel(II) complex of a hexadentate N2O2S2 thioether ligand: synthesis, characterization, X-ray and electronic structure. TRANSIT METAL CHEM 2016. [DOI: 10.1007/s11243-016-0087-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
7
|
Borren ES, Fitchett CM, Fulton JR. (β-Diketiminato)cadmium Bis(trimethylsilyl)amide: Facile Access to Low-Coordinate Cadmium Complexes. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600274] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Elliot S. Borren
- School of Chemical and Physical Sciences; Victoria University of Wellington; P. O. Box 600 6012 Wellington New Zealand
| | | | - J. Robin Fulton
- School of Chemical and Physical Sciences; Victoria University of Wellington; P. O. Box 600 6012 Wellington New Zealand
| |
Collapse
|
8
|
A copper(II) complex with a thioether and ether containing azophenol ligand: Synthesis, spectra, X-ray structure and DFT computations. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.07.064] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
9
|
Siek S, Dixon NA, Kumar M, Kraus JS, Wells KR, Rowe BW, Kelley SP, Zeller M, Yap GPA, Papish ET. Synthesis of Biomimetic Zinc Complexes for CO2 Activation and the Influence of Steric Changes in the Ttz Ligands [Ttz = Tris(triazolyl)borate]. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500819] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sopheavy Siek
- Department of ChemistryThe University of AlabamaBox 87033635487‐0336TuscaloosaAlabamaUSA
| | - Natalie A. Dixon
- Department of ChemistryDrexel University3141 Chestnut St.19104PhiladelphiaPAUSA
| | - Mukesh Kumar
- Department of ChemistryDrexel University3141 Chestnut St.19104PhiladelphiaPAUSA
| | - Jodi S. Kraus
- Department of ChemistryDrexel University3141 Chestnut St.19104PhiladelphiaPAUSA
| | - Kirsten R. Wells
- Department of ChemistrySalisbury University1101 Camden Ave.21801SalisburyMDUSA
| | - Brittany W. Rowe
- Department of ChemistrySalisbury University1101 Camden Ave.21801SalisburyMDUSA
| | - Steven P. Kelley
- Department of ChemistryThe University of AlabamaBox 87033635487‐0336TuscaloosaAlabamaUSA
| | - Matthias Zeller
- Department of ChemistryYoungstown State UniversityOne University Plaza44555YoungstownOHUSA
| | - Glenn P. A. Yap
- Department of Chemistry and BiochemistryUniversity of Delaware102 Brown Laboratory19716NewarkDEUSA
| | - Elizabeth T. Papish
- Department of ChemistryThe University of AlabamaBox 87033635487‐0336TuscaloosaAlabamaUSA
| |
Collapse
|
10
|
Biswas S, Sarkar D, Kundu S, Roy P, Mondal TK. Rhodium(III)-triphenylphosphine complex with NNS donor thioether containing Schiff base ligand: Synthesis, spectra, electrochemistry and catalytic activity. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.06.065] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
11
|
Sobhani S, Zeraatkar Z. A new magnetically recoverable heterogeneous palladium catalyst for phosphonation reactions in aqueous micellar solution. Appl Organomet Chem 2015. [DOI: 10.1002/aoc.3392] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Sara Sobhani
- Department of Chemistry, College of Sciences; University of Birjand; Birjand Iran
| | - Zohre Zeraatkar
- Department of Chemistry, College of Sciences; University of Birjand; Birjand Iran
| |
Collapse
|
12
|
Tomar K. Synthesis, crystal structure and hydrolytic activity of a trispyrazolyl borato cadmium hydroxo complex. INORG CHEM COMMUN 2015. [DOI: 10.1016/j.inoche.2015.02.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
13
|
Mondal P, Sarkar R, Hens A, Rajak KK. Mononuclear rhenium(i) complexes incorporating 2-(arylazo)phenyl benzyl thioethers: synthesis, structure, spectral, DFT and TDDFT studies. RSC Adv 2014. [DOI: 10.1039/c4ra05699j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
|
14
|
Octahedral Ni(II) and Cu(II) complexes with a new hexadentate (NSN)2 donor ligand: Synthesis, characterization, X-ray structure and DFT calculations. Polyhedron 2014. [DOI: 10.1016/j.poly.2014.03.052] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
15
|
Ruthenium(III) complexes with tetradentate NSNO donor ligand: Synthesis, electronic structure, catalytic activity and DFT calculation. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2013.11.035] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
16
|
Pramanik AK, Jana MS, Mondal TK. Cu(II) complexes of a new tetradentate N2SO donor: synthesis, structure, electrochemistry, and DFT computation. J COORD CHEM 2013. [DOI: 10.1080/00958972.2013.857407] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Ajoy Kumar Pramanik
- Department of Chemistry, Inorganic Chemistry Section, Jadavpur University, Kolkata, India
| | - Mahendra Sekhar Jana
- Department of Chemistry, Inorganic Chemistry Section, Jadavpur University, Kolkata, India
| | - Tapan Kumar Mondal
- Department of Chemistry, Inorganic Chemistry Section, Jadavpur University, Kolkata, India
| |
Collapse
|
17
|
Sickerman NS, Henry RM, Ziller JW, Borovik AS. Preparation and Structural Properties of In III-H Complexes. Polyhedron 2013; 58:65-70. [PMID: 25309019 PMCID: PMC4190917 DOI: 10.1016/j.poly.2012.07.098] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The use of the tripodal ligands tris[(N'-tert-butylureaylato)-N-ethyl]aminato ([H3buea]3-) and the sulfonamide-based N,N',N"-[2,2',2"-nitrilotris(ethane-2,1-diyl)]tris(2,4,6-trimethylbenzene-sulfonamidato) ([MST]3-) has led to the synthesis of two structurally distinct In(III)-OH complexes. The first example of a five-coordinate indium(III) complex with a terminal hydroxide ligand, K[InIIIH3buea(OH)], was prepared by addition of In(OAc)3 and water to a deprotonated solution of H6buea. X-ray diffraction analysis, as well as FTIR and 1H NMR spectroscopic methods, provided evidence for the formation of a monomeric In(III)-OH complex. The complex contains an intramolecular hydrogen bonding (H-bonding) network involving the In(III)-OH unit and [H3buea]3- ligand, which aided in isolation of the complex. Isotope labeling studies verified the source of the hydroxo ligand as water. Treatment of the [InIIIMST] complex with a mixture of 15-crown-5 ether and NaOH led to isolation of the complex [15-crown-5⊃NaI-(μ-OH)-InIIIMST], whose solid-state structure was confirmed using X-ray diffraction methods. Nuclear magnetic resonance studies on this complex suggest it retains its heterobimetallic structure in solution.
Collapse
Affiliation(s)
- Nathaniel S Sickerman
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, CA 92697
| | - Renée M Henry
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, CA 92697
| | - Joseph W Ziller
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, CA 92697
| | - A S Borovik
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, CA 92697
| |
Collapse
|
18
|
fac-Tricarbonyl rhenium(I) complexes of 2-(alkylthio)-N-((pyridine-2-yl)methylene)benzenamine: Synthesis, spectroscopic characterization, X-ray structure and DFT calculation. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2013.01.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
19
|
Jana MS, Pramanik AK, Kundu S, Sarkar D, Jana S, Mondal TK. Synthesis, X-ray structure, spectroscopic and DFT study of cis-[Ru(PPh3)(L)X2] complexes (X=Cl−, Br−, I− and NCS−) (L=1-methyl-2-{(o-thiomethyl)phenylazo}imidazole). Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2012.09.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
20
|
García-Deibe AM, Portela-García C, Fondo M, Mota AJ, Sanmartín-Matalobos J. Encapsulation of atmospheric CO2 by a self-assembled decanuclear cadmium complex via unfamiliar perchlorato and carbonato bridges. Chem Commun (Camb) 2012; 48:9915-7. [PMID: 22932953 DOI: 10.1039/c2cc35171d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A decanuclear Cd complex has been found as a carbonate-containing capsule. The structure strongly resembles a ten-blade waterwheel with a central carbonate ligand surrounded by two superimposed Cd(5)O(5) crowns with a pentagonal antiprism-like disposition. The capsule is doubly capped by two pentadentate perchlorate anions.
Collapse
Affiliation(s)
- Ana M García-Deibe
- Departamento de Química Inorgánica, Facultad de Química, Universidad de Santiago de Compostela, 15782-Santiago de Compostela, Spain
| | | | | | | | | |
Collapse
|
21
|
Daumann LJ, Gahan LR, Comba P, Schenk G. Cadmium(II) Complexes: Mimics of Organophosphate Pesticide Degrading Enzymes and Metallo-β-lactamases. Inorg Chem 2012; 51:7669-81. [DOI: 10.1021/ic300687y] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lena J. Daumann
- School of
Chemistry and Molecular
Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Lawrence. R. Gahan
- School of
Chemistry and Molecular
Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Peter Comba
- Anorganisch-Chemisches Institut, Universitat Heidelberg, Im Neuenheimer Feld 270, 69120
Heidelberg, Germany
| | - Gerhard Schenk
- School of
Chemistry and Molecular
Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
- Department
of Chemistry, National University of Ireland, Maynooth, County Kildare,
Ireland
| |
Collapse
|
22
|
Spiropulos NG, Standley EA, Shaw IR, Ingalls BL, Diebels B, Krawczyk SV, Gherman BF, Arif AM, Brown EC. Synthesis of zinc and cadmium O-alkyl thiocarbonate and dithiocarbonate complexes and a cationic zinc hydrosulfide complex. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2012.01.040] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
23
|
Copper–thioarylazoimidazole complexes: Structures, photochromism and redox interconversion between Cu(II)↔Cu(I) and correlation with DFT calculation. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.03.073] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
24
|
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.
Collapse
Affiliation(s)
- Vicky Mah
- Department of Chemistry, University of Calgary, Calgary, AB, T2N 1N4, Canada
| | | |
Collapse
|
25
|
Nandi S, Bannerjee D, Wu JS, Lu TH, Slawin AMZ, Woollins JD, Ribas J, Sinha C. Thioether Bonded Nickel(II)-Azoimidazole Complexes: Structures, Spectra and Electrochemical Oxidation to the Nickel(III) State. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200900423] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
26
|
Mirams RE, Smith SJ, Hadler KS, Ollis DL, Schenk G, Gahan LR. Cadmium(II) complexes of the glycerophosphodiester-degrading enzyme GpdQ and a biomimetic N,O ligand. J Biol Inorg Chem 2008; 13:1065-72. [PMID: 18535849 DOI: 10.1007/s00775-008-0392-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2008] [Accepted: 05/23/2008] [Indexed: 11/30/2022]
Abstract
The glycerophosphodiester-degrading enzyme GpdQ from Enterobacter aerogenes is a promising bioremediator owing to its ability to degrade some organophosphate pesticides and diester products originating from the hydrolysis of nerve agents such as VX. Here, the cadmium derivative of GpdQ was prepared by reconstituting the apoenzyme. Catalytic measurements with (Cd(2+))(2)-GpdQ and the phosphodiester substrate bis(4-nitrophenyl)phosphate yield k(cat) = 15 s(-1). The pK(a) of 9.4, determined from the pH dependence of the catalytic activity, implicates a hydroxide ligand as the catalytic nucleophile. Also prepared was the cadmium-containing biomimetic [Cd(2)((HP)(2)B)(OAc)(2)(OH(2))](PF(6)) (where (HP)(2)B is [2,6-bis([(2-pyridylmethyl)(2-hydroxyethyl)amino]methyl)-4-methylphenol]), which mimics the asymmetry of the metal ion coordination in the active site of GpdQ. The phosphoesterase-like activity of [Cd(2)((HP)(2)B)(OAc)(2)(OH(2))](PF(6)) was studied using the substrate bis(2,4-dinitrophenyl)phosphate, yielding a kinetically relevant pK(a) of 8.9, with k(cat) = 0.004 s(-1). In summary, the model is both an adequate structural and a reasonable functional mimic of GpdQ.
Collapse
Affiliation(s)
- Ruth E Mirams
- School of Molecular and Microbial Sciences, The University of Queensland, St. Lucia, QLD, 4072, Australia
| | | | | | | | | | | |
Collapse
|
27
|
Mishra S, Daniele S, Hubert-Pfalzgraf LG, Jeanneau E. Hydrolysis of a (2-Propanol)yttrium Triiodide Complex in the Presence of Glymes: Synthesis and X-ray Structures of Hydroxo-Bridged Dinuclear Yttrium Complexes and Their Applications in Materials Science. Eur J Inorg Chem 2007. [DOI: 10.1002/ejic.200601232] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
28
|
Janzen DE, Botros ME, VanDerveer DG, Grant GJ. Fixation of atmospheric carbon dioxide by a cadmium(ii) macrocyclic complex. Dalton Trans 2007:5316-21. [DOI: 10.1039/b711187h] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|