1
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Targeting emerging cancer hallmarks by transition metal complexes: Epigenetic reprogramming and epitherapies. Part II. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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2
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Thioester synthesis by a designed nickel enzyme models prebiotic energy conversion. Proc Natl Acad Sci U S A 2022; 119:e2123022119. [PMID: 35858422 PMCID: PMC9335327 DOI: 10.1073/pnas.2123022119] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
The formation of carbon-carbon bonds from prebiotic precursors such as carbon dioxide represents the foundation of all primordial life processes. In extant organisms, this reaction is carried out by the carbon monoxide dehydrogenase (CODH)/acetyl coenzyme A synthase (ACS) enzyme, which performs the cornerstone reaction in the ancient Wood-Ljungdahl metabolic pathway to synthesize the key biological metabolite, acetyl-CoA. Despite its significance, a fundamental understanding of this transformation is lacking, hampering efforts to harness analogous chemistry. To address these knowledge gaps, we have designed an artificial metalloenzyme within the azurin protein scaffold as a structural, functional, and mechanistic model of ACS. We demonstrate the intermediacy of the NiI species and requirement for ordered substrate binding in the bioorganometallic carbon-carbon bond-forming reaction from the one-carbon ACS substrates. The electronic and geometric structures of the nickel-acetyl intermediate have been characterized using time-resolved optical, electron paramagnetic resonance, and X-ray absorption spectroscopy in conjunction with quantum chemical calculations. Moreover, we demonstrate that the nickel-acetyl species is chemically competent for selective acyl transfer upon thiol addition to biosynthesize an activated thioester. Drawing an analogy to the native enzyme, a mechanism for thioester generation by this ACS model has been proposed. The fundamental insight into the enzymatic process provided by this rudimentary ACS model has implications for the evolution of primitive ACS-like proteins. Ultimately, these findings offer strategies for development of highly active catalysts for sustainable generation of liquid fuels from one-carbon substrates, with potential for broad applications across diverse fields ranging from energy storage to environmental remediation.
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3
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Riffel MN, Siegel L, Oliver AG, Tsui EY. Cluster self-assembly and anion binding by metal complexes of non-innocent thiazolidinyl-thiolate ligands. Dalton Trans 2022; 51:9611-9615. [PMID: 35695261 DOI: 10.1039/d2dt01339h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ZnII and FeII chloride complexes of a di(methylthiazolidinyl)pyridine ligand were deprotonated to form the corresponding thiolate complexes supported by redox-active iminopyridine moieties. The thiolate donor groups are nucleophilic and reactive toward oxidants, electrophiles, and protons, while the pendant thiazolidine rings are available for hydrogen bonding. Anion exchange with the weakly-coordinating triflate anion resulted in self-assembly of the iminopyridine complexes to form a trimeric [M3S3] cluster. Hydrogen bonding closely associates anions with this trimetallic core.
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Affiliation(s)
- Madeline N Riffel
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA.
| | - Lukas Siegel
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA. .,Department of Chemistry, Heidelberg University, Heidelberg, Germany
| | - Allen G Oliver
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA.
| | - Emily Y Tsui
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA.
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4
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de Paiva REF, Marçal Neto A, Santos IA, Jardim ACG, Corbi PP, Bergamini FRG. What is holding back the development of antiviral metallodrugs? A literature overview and implications for SARS-CoV-2 therapeutics and future viral outbreaks. Dalton Trans 2020; 49:16004-16033. [PMID: 33030464 DOI: 10.1039/d0dt02478c] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
In light of the Covid-19 outbreak, this review brings together historical and current literature efforts towards the development of antiviral metallodrugs. Classical compounds such as CTC-96 and auranofin are discussed in depth, as pillars for future metallodrug development. From the recent literature, both cell-based results and biophysical assays against potential viral biomolecule targets are summarized here. The comprehension of the biomolecular targets and their interactions with coordination compounds are emphasized as fundamental strategies that will foment further development of metal-based antivirals. We also discuss other possible and unexplored methods for unveiling metallodrug interactions with biomolecules related to viral replication and highlight the specific challenges involved in the development of antiviral metallodrugs.
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Affiliation(s)
- Raphael E F de Paiva
- Department of Fundamental Chemistry, Institute of Chemistry, University of Sao Paulo, Sao Paulo, SP - 05508-000, Brazil.
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5
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Ding Y, Tang J, You X, Zhang X, Wang G, Yao C, Lin M, Wang X, Cheng D. Study on the mechanism underlying Al-induced hepatotoxicity based on the identification of the Al-binding proteins in liver. Metallomics 2019; 11:1353-1362. [PMID: 31343013 DOI: 10.1039/c9mt00150f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Aluminum (Al) is the most abundant metal element in the earth's crust, and is implicated in the pathogenesis of liver lesions. However, the mechanisms underlying Al3+-induced hepatotoxicity are still largely elusive. Based on analysis with native gel electrophoresis, Al3+ plus 8-hydroxyquinoline staining and LC-MS/MS, the proteins with high Al3+ affinity were identified to be carbamoyl-phosphate synthase, adenosylhomocysteinase, heat shock protein 90-alpha, carbonic anhydrase 3, serum albumin and calreticulin. These proteins are involved in physiological processes such as the urea cycle, redox reactions, apoptosis and so on. Then we established an Al3+-treated rat model for biochemical tests, morphology observation and Ca2+ homeostasis analysis, in order to evaluate the extent of oxidative damage, hepatic histopathology and specific indicators of Al3+-related proteins in liver. Our findings indicated the high-affinity interactions with Al3+ perturbed the normal function of the above proteins, which could account for the mechanism underlying Al3+-induced hepatotoxicity.
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Affiliation(s)
- Yixin Ding
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, No. 29, 13th Avenue, Tianjin Economy Technological Development Area, Tianjin, 300457, China.
| | - Jinlei Tang
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, No. 29, 13th Avenue, Tianjin Economy Technological Development Area, Tianjin, 300457, China.
| | - Xun You
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, No. 29, 13th Avenue, Tianjin Economy Technological Development Area, Tianjin, 300457, China.
| | - Xiongfeng Zhang
- Jiangxi Province Tobacco Science Research Institute, Nanchang, 330000, China
| | - Guangliang Wang
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, No. 29, 13th Avenue, Tianjin Economy Technological Development Area, Tianjin, 300457, China.
| | - Congying Yao
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, No. 29, 13th Avenue, Tianjin Economy Technological Development Area, Tianjin, 300457, China.
| | - Mibin Lin
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, No. 29, 13th Avenue, Tianjin Economy Technological Development Area, Tianjin, 300457, China.
| | - Xuerui Wang
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, No. 29, 13th Avenue, Tianjin Economy Technological Development Area, Tianjin, 300457, China.
| | - Dai Cheng
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, No. 29, 13th Avenue, Tianjin Economy Technological Development Area, Tianjin, 300457, China. and Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, China
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6
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Cheng D, Wang X, Xi Y, Cao J, Jiang W. Identification of the Al-binding proteins that account for aluminum neurotoxicity and transport in vivo. Toxicol Res (Camb) 2017; 7:127-135. [PMID: 30090569 DOI: 10.1039/c7tx00261k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Accepted: 11/22/2017] [Indexed: 12/22/2022] Open
Abstract
Studies have shown that aluminum (Al) is the most abundant neurotoxic element on Earth, and is implicated in the pathogenesis of Alzheimer's disease (AD). However, the mechanisms underlying Al-induced neurotoxicity are still largely elusive. Based on affinity analyses with Al and LC-LTQ-MS, we have found that serum albumin, brain CK-B and 14-3-3ζ protein have a high affinity for Al3+, and albumin has a much stronger affinity for Al than transferrin. The normal activity of CK-B, and physiological combination of 14-3-3ζ with tau can be severely perturbed by Al. We anticipate that our assay will provide a new focus concerning the mechanism underlying Al-induced neurotoxicity, and aid the design of strategies to prevent AD and other human diseases related to Al overload.
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Affiliation(s)
- Dai Cheng
- Key Laboratory of Food Safety and Sanitation , Ministry of Education , College of Food Engineering and Biotechnology , Tianjin University of Science and Technology , Tianjin , People's Republic of China.,College of Food Science and Nutritional Engineering , China Agricultural University , Beijing , People's Republic of China . .,Research Center of Food Science and Human Health , School of Medicine , Nankai University , Tianjin , 300071 , China
| | - Xiaomei Wang
- College of Food Science and Nutritional Engineering , China Agricultural University , Beijing , People's Republic of China .
| | - Yu Xi
- College of Food Science and Nutritional Engineering , China Agricultural University , Beijing , People's Republic of China .
| | - Jiankang Cao
- College of Food Science and Nutritional Engineering , China Agricultural University , Beijing , People's Republic of China .
| | - Weibo Jiang
- College of Food Science and Nutritional Engineering , China Agricultural University , Beijing , People's Republic of China .
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7
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Nakajima T, Kawasaki Y, Kure B, Tanase T. Homo‐ and Heterodinuclear Rh and Ir Complexes Supported by SN
n
Mixed‐Donor Ligands (
n
= 2–4): Stereochemistry and Coordination‐Site‐Exchange Reactions of Cp*M (M = Rh, Ir) Units. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600722] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Takayuki Nakajima
- Department of Chemistry Faculty of Science Nara Women's University Kitauoya‐nishi‐machi 630‐8506 Nara Japan
| | - Yuki Kawasaki
- Department of Chemistry Faculty of Science Nara Women's University Kitauoya‐nishi‐machi 630‐8506 Nara Japan
| | - Bunsho Kure
- Department of Chemistry Faculty of Science Nara Women's University Kitauoya‐nishi‐machi 630‐8506 Nara Japan
| | - Tomoaki Tanase
- Department of Chemistry Faculty of Science Nara Women's University Kitauoya‐nishi‐machi 630‐8506 Nara Japan
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8
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Du Z, de Paiva REF, Qu Y, Farrell N. Tuning the reactivity of Sp1 zinc fingers with platinum complexes. Dalton Trans 2016; 45:8712-6. [PMID: 27171123 DOI: 10.1039/c6dt01128d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023]
Abstract
cis-DDP presents reactivity towards the transcription factor Sp1-F3, as opposed to previous observations for Sp1-F2. Replacing the ammine ligands with the chelating ethylenediamine increases the reactivity giving a unique dinuclear {Pt(en)}2-bis(cysteine)-bridged product, confirmed by study of the binding sequence ACPECP.
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Affiliation(s)
- Zhifeng Du
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA 23284-2006, USA.
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9
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Fu Y, Romero MJ, Salassa L, Cheng X, Habtemariam A, Clarkson GJ, Prokes I, Rodger A, Costantini G, Sadler PJ. Os2 -Os4 Switch Controls DNA Knotting and Anticancer Activity. Angew Chem Int Ed Engl 2016; 55:8909-12. [PMID: 27240103 PMCID: PMC4982093 DOI: 10.1002/anie.201602995] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2016] [Revised: 05/01/2016] [Indexed: 12/19/2022]
Abstract
Dinuclear trihydroxido‐bridged osmium–arene complexes are inert and biologically inactive, but we show here that linking dihydroxido‐bridged OsII–arene fragments by a bridging di‐imine to form a metallacycle framework results in strong antiproliferative activity towards cancer cells and distinctive knotting of DNA. The shortened spacer length reduces biological activity and stability in solution towards decomposition to biologically inactive dimers. Significant differences in behavior toward plasmid DNA condensation are correlated with biological activity.
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Affiliation(s)
- Ying Fu
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, UK.,Laboratory of Molecular Biology, Center for Cancer Research, NCI, Building 37, Room 5011, Bethesda, MD, 20892-4264, USA
| | - María J Romero
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, UK.,Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Luca Salassa
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, UK.,CIC biomaGUNE, Paseo de Miramón 182, 20009, Donostia-San Sebastián, Spain
| | - Xi Cheng
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, UK
| | | | - Guy J Clarkson
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, UK
| | - Ivan Prokes
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, UK
| | - Alison Rodger
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, UK
| | | | - Peter J Sadler
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, UK.
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10
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Fu Y, Romero MJ, Salassa L, Cheng X, Habtemariam A, Clarkson GJ, Prokes I, Rodger A, Costantini G, Sadler PJ. Os2-Os4Switch Controls DNA Knotting and Anticancer Activity. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602995] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ying Fu
- Department of Chemistry; University of Warwick; Coventry CV4 7AL UK
- Laboratory of Molecular Biology; Center for Cancer Research, NCI; Building 37, Room 5011 Bethesda MD 20892-4264 USA
| | - María J. Romero
- Department of Chemistry; University of Warwick; Coventry CV4 7AL UK
- Departamento de Química Inorgánica; Facultade de Química; Universidade de Santiago de Compostela; 15782 Santiago de Compostela Spain
| | - Luca Salassa
- Department of Chemistry; University of Warwick; Coventry CV4 7AL UK
- CIC biomaGUNE; Paseo de Miramón 182 20009 Donostia-San Sebastián Spain
| | - Xi Cheng
- Department of Chemistry; University of Warwick; Coventry CV4 7AL UK
| | | | - Guy J. Clarkson
- Department of Chemistry; University of Warwick; Coventry CV4 7AL UK
| | - Ivan Prokes
- Department of Chemistry; University of Warwick; Coventry CV4 7AL UK
| | - Alison Rodger
- Department of Chemistry; University of Warwick; Coventry CV4 7AL UK
| | | | - Peter J. Sadler
- Department of Chemistry; University of Warwick; Coventry CV4 7AL UK
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11
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Denny JA, Foley WS, Todd AD, Darensbourg MY. The ligand unwrapping/rewrapping pathway that exchanges metals in S-acetylated, hexacoordinate N 2S 2O 2 complexes. Chem Sci 2015; 6:7079-7088. [PMID: 29896341 PMCID: PMC5954489 DOI: 10.1039/c5sc02269j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 09/05/2015] [Indexed: 12/13/2022] Open
Abstract
The effect of S-acetylation in MN2S2 complexes on metal exchange reactivity was examined in a series of MN2S2O2 complexes.
The effect of S-acetylation in MN2S2 complexes on metal exchange reactivity was examined in a series of MN2S2O2 complexes. While clean exchange processes do not occur for the MN2S2 derivatives where formation of S-bridged aggregates predominate, acetylation permits the metal exchange with hierarchy that follows the Irving–Williams series of stability for first row transition metals: Fe2+ < Co2+ < Ni2+ < Cu2+ > Zn2+. The rate determining step consistent with kinetic parameters depends on both M and M′, supporting a mechanism of exchange that involves ligand unwrapping/rewrapping process as earlier defined by Margerum et al. for M(EDTA) systems. The enhanced metal exchange deriving from S-acetylation is of significance to probes and detection of cysteine-S metallo-proteins and metallo-enzyme active sites, and highlights a new role for S-acetylation.
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Affiliation(s)
- J A Denny
- Department of Chemistry , Texas A&M University , College Station , Texas 77843 , USA .
| | - W S Foley
- Department of Chemistry , Texas A&M University , College Station , Texas 77843 , USA .
| | - A D Todd
- Department of Chemistry , Texas A&M University , College Station , Texas 77843 , USA .
| | - M Y Darensbourg
- Department of Chemistry , Texas A&M University , College Station , Texas 77843 , USA .
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12
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Denny JA, Darensbourg MY. Metallodithiolates as ligands in coordination, bioinorganic, and organometallic chemistry. Chem Rev 2015; 115:5248-73. [PMID: 25948147 DOI: 10.1021/cr500659u] [Citation(s) in RCA: 108] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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13
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Tsotsoros SD, Qu Y, Farrell NP. The reaction of dichlorodiammineplatinum(II), [PtCl2(NH3)2], isomers with zinc fingers. J Inorg Biochem 2015; 143:117-22. [DOI: 10.1016/j.jinorgbio.2014.12.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 12/02/2014] [Accepted: 12/02/2014] [Indexed: 11/24/2022]
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14
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McCready MS, Puddephatt RJ. The Platinum Center is a Stronger Nucleophile than the Free Nitrogen Donors in a Dimethylplatinum Complex with a Dipyridylpyridazine Ligand. Organometallics 2014. [DOI: 10.1021/om501023r] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Matthew S. McCready
- Department of Chemistry, University of Western Ontario, London, Ontario, Canada N6A 5B7
| | - Richard J. Puddephatt
- Department of Chemistry, University of Western Ontario, London, Ontario, Canada N6A 5B7
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15
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Daniel AG, Farrell NP. The dynamics of zinc sites in proteins: electronic basis for coordination sphere expansion at structural sites. Metallomics 2014; 6:2230-41. [PMID: 25329367 DOI: 10.1039/c4mt00213j] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The functional role assumed by zinc in proteins is closely tied to the variable dynamics around its coordination sphere arising by virtue of its flexibility in bonding. Modern experimental and computational methods allow the detection and study of previously unknown features of bonding between zinc and its ligands in protein environment. These discoveries are occurring just in time as novel biological functions of zinc, which involve rather unconventional coordination trends, are emerging. In this sense coordination sphere expansion of structural zinc sites, as observed in our previous experiments, is a novel phenomenon. Here we explore the electronic and structural requirements by simulating this phenomenon in structural zinc sites using DFT computations. For this purpose, we have chosen MPW1PW91 and a mixed basis set combination as the DFT method through benchmarking, because it accurately reproduces structural parameters of experimentally characterized zinc compounds. Using appropriate models, we show that the greater ionic character of zinc coordination would allow for coordination sphere expansion if the steric and electrostatic repulsions of the ligands are attenuated properly. Importantly, through the study of electronic and structural aspects of the models used, we arrive at a comprehensive bonding model, explaining the factors that influence coordination of zinc in proteins. The proposed model along with the existing knowledge would enhance our ability to predict zinc binding sites in proteins, which is today of growing importance given the predicted enormity of the zinc proteome.
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Affiliation(s)
- A Gerard Daniel
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA 23284-2006, USA.
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16
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Kure B, Sano M, Nakajima T, Tanase T. Systematic Heterodinuclear Complexes with MM′(μ-meppp) Centers That Tune the Properties of a Nesting Hydride (M = Ni, Pd, Pt; M′ = Rh, Ir; H2meppp = meso-1,3-Bis[(mercaptoethyl)phenylphosphino]propane). Organometallics 2014. [DOI: 10.1021/om500410f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Bunsho Kure
- Department of Chemistry,
Faculty of Science, Nara Women’s University, Kitauoya-nishi-machi, Nara 630-8506, Japan
| | - Mikie Sano
- Department of Chemistry,
Faculty of Science, Nara Women’s University, Kitauoya-nishi-machi, Nara 630-8506, Japan
| | - Takayuki Nakajima
- Department of Chemistry,
Faculty of Science, Nara Women’s University, Kitauoya-nishi-machi, Nara 630-8506, Japan
| | - Tomoaki Tanase
- Department of Chemistry,
Faculty of Science, Nara Women’s University, Kitauoya-nishi-machi, Nara 630-8506, Japan
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17
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New Zn(II) complexes with N2S2 Schiff base ligands. Experimental and theoretical studies of the role of Zn(II) in disulfide thiolate-exchange. Polyhedron 2014. [DOI: 10.1016/j.poly.2013.12.040] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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18
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Chambers GM, Angamuthu R, Gray DL, Rauchfuss TB. Organo Ruthenium–Nickel Dithiolates with Redox-Responsive Nickel Sites. Organometallics 2013. [DOI: 10.1021/om4006824] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Geoffrey M. Chambers
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
| | - Raja Angamuthu
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
| | - Danielle L. Gray
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
| | - Thomas B. Rauchfuss
- School of Chemical Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
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19
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Luck RL, Olds TA, Zeller M. Bis{μ-2,2'-[(butane-2,3-diylidene)bis(azanylylidene)]dibenzenethiolato}dizinc(II)-dimethyl sulfoxide-methanol (2/0.18/0.82). Acta Crystallogr C 2013; 69:1116-9. [PMID: 24096497 DOI: 10.1107/s0108270113023524] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Accepted: 08/21/2013] [Indexed: 11/11/2022] Open
Abstract
The asymmetric unit in the crystal structure of the title compound, [Zn2(C16H14N2S2)2]2·0.18C2H6OS·0.82CH3OH, consists of two ordered bis{μ-2,2'-[(butane-2,3-diylidene)bis(azanylylidene)]dibenzenethiolato}dizinc(II) molecules and a disordered solvent combination at the same location which refined to 18.1 (7)% dimethyl sulfoxide and 81.9 (7)% methanol. The compound has a metallic cluster structure formed by the joining together of two zinc(II) complex molecules, forming a rhomboidal Zn2S2 arrangement. This complex was previously suggested on the basis of nonstructural evidence to be a monomer [Jadamus, Fernando & Freiser (1964). J. Am. Chem. Soc. 86, 3056-3059]. Each Zn(II) atom is five-coordinated and exhibits distorted trigonal bipyramidal geometry. The structure may be of interest with respect to zinc-thiolate bonds, the coordination chemistry of Schiff bases and the folding of proteins. The structure displays weak intermolecular C-H···S, C-H···O and C-H···N interactions, and contains a unique bonding arrangement of the ligands around the Zn2S2 rhomboid.
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Affiliation(s)
- Rudy L Luck
- Department of Chemistry, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49930, USA
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20
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Yang C, Ma F, Tang J, Han L, Wei S, Zhou L, Zhou J, Shen J, Ge X. Comparing the interaction of vanadyl-hypocrellin A complex and hypocrellin A with CT DNA. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2012.09.081] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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21
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Mangrum JB, Zgani I, Tsotsoros SD, Qu Y, Farrell NP. Zinc finger peptide cleavage by a dinuclear platinum compound. Chem Commun (Camb) 2013; 49:6986-8. [DOI: 10.1039/c3cc44219e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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de Paula QA, Tsotsoros SD, Qu Y, Bayse CA, Farrell NP. Platinum–nucleobase PtN4 complexes as chemotypes for selective peptide reactions with biomolecules. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2012.07.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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23
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Understanding trans platinum complexes as potential antitumor drugs beyond targeting DNA. J Inorg Biochem 2012; 114:106-12. [DOI: 10.1016/j.jinorgbio.2012.06.002] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Revised: 06/05/2012] [Accepted: 06/05/2012] [Indexed: 11/20/2022]
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24
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Dever SM, White ER, Hartman MCT, Valerie K. BRCA1-directed, enhanced and aberrant homologous recombination: mechanism and potential treatment strategies. Cell Cycle 2012; 11:687-94. [PMID: 22306997 DOI: 10.4161/cc.11.4.19212] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Despite intense studies, questions still remain regarding the molecular mechanisms leading to the development of hereditary breast and ovarian cancers. Research focused on elucidating the role of the breast cancer susceptibility gene 1 (BRCA1) in the DNA damage response may be of the most critical importance to understanding these processes. The BRCA1 protein has an N-terminal RING domain possessing E3 ubiquitinligase activity and a C-terminal BRCT domain involved in binding specific phosphoproteins. These domains are involved directly or indirectly in DNA double-strand break (DSB) repair. As the two terminal domains of BRCA1 represent two separate entities, understanding how these domains communicate and are functionally altered in regards to DSB repair is critical for understanding the development of BRCA1-related breast and ovarian cancers and for developing novel therapeutics. Herein, we review recent findings of how altered functions of these domains might lead to cancer through a mechanism of increased aberrant homologous recombination and possible implications for the development of BRCA1 inhibitors.
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Affiliation(s)
- Seth M Dever
- Department of Radiation Oncology, Virginia Commonwealth University, Richmond, VA, USA
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25
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Patel MN, Dosi PA, Bhatt BS. Nucleic acid interaction and antibacterial behaviours of a ternary palladium(II) complexes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 86:508-514. [PMID: 22153744 DOI: 10.1016/j.saa.2011.10.077] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2011] [Revised: 10/22/2011] [Accepted: 10/28/2011] [Indexed: 05/31/2023]
Abstract
The bidentate ligands and Pd(II) complexes have been synthesized and characterized using elemental analysis (C, H, N), (1)H NMR, (13)C NMR, electronic spectra, FT-IR and FAB mass spectroscopy. The binding of palladium complexes with calf thymus DNA (CT DNA) has been explored using absorption titration, DNA melting temperature and viscosity measurements. The cleavage reaction on pUC19 DNA has been monitored by agarose gel electrophoresis. The results suggest that complexes can bind to DNA by intercalative modes and exhibit nuclease activities in which supercoil form is converted to open circular form. The antibacterial activity of ligands and complexes has been performed against three Gram(-ve) and two Gram(+ve) microorganisms and the study indicates that all the complexes show better microbial inhibition activity than ligands and palladium salt.
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Affiliation(s)
- Mohan N Patel
- Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar - 388 120 Gujarat, India.
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26
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Denny JA, Foley WS, Almaraz E, Reibenspies JH, Bhuvanesh N, Darensbourg MY. Comparisons of zinc with cadmium in N2S2coordination and as S-bonded adducts to tungsten carbonyls. Dalton Trans 2012; 41:143-8. [DOI: 10.1039/c1dt11336d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Wang Y, Zhu Y, Wang Y, Chen G. Structural analysis of zinc-finger (TTK) + [Cu(BPA)]2+ /[Cu(IDB)]2+ + DNA complexes: an investigation by molecular dynamics simulation. J Mol Recognit 2011; 24:981-94. [PMID: 22038805 DOI: 10.1002/jmr.1146] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
In the present study, the molecular dynamics simulation technique is employed to investigate the hydrogen abstraction possibility from sugar of DNA in two designed complexes of copper-based chemical nuclease [Cu(BPA)](2+) bis(2-pyridylmethyl) amine (BPA) or [Cu(IDB)](2+) N,N-bis(2-benzimidazolylmethyl) amine (IDB) bound to the zinc finger protein Tramtrack (TTK). The simulated results show that each of the designed complexes can form a stable conformation within 30 ns of simulation time with the substrate OOH(-) and an 18-base pair (bp) DNA segment and is located in the major groove of the DNA segment. The active terminal O atom of the OOH(-) substrate is found in close proximity to the target C2'H, C3'H, C4'H or C5'H proton of the DNA in TTK + [Cu(BPA)OOH](+) + DNA or TTK + [Cu(IDB)OOH](+) + DNA complex, which is crucial to propose the hydrogen abstraction possibility that is responsible for the DNA cleavage. The positions of copper-based chemical nucleases bound to TTK may substantially influence the hydrogen abstraction possibility. The structures and sizes of ligands in copper-based nucleases are also found to have influence on the order of difficulty of the hydrogen abstraction from the sugars of DNA.
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Affiliation(s)
- Yaru Wang
- College of Chemistry, Beijing Normal University, Beijing, 100875, China
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28
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Michalek JL, Besold AN, Michel SLJ. Cysteine and histidine shuffling: mixing and matching cysteine and histidine residues in zinc finger proteins to afford different folds and function. Dalton Trans 2011; 40:12619-32. [PMID: 21952363 DOI: 10.1039/c1dt11071c] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Zinc finger proteins utilize zinc for structural purposes: zinc binds to a combination of cysteine and histidine ligands in a tetrahedral coordination geometry facilitating protein folding and function. While much is known about the classical zinc finger proteins, which utilize a Cys(2)His(2) ligand set to coordinate zinc and fold into an anti-parallel beta sheet/alpha helical fold, there are thirteen other families of 'non-classical' zinc finger proteins for which relationships between metal coordination and protein structure/function are less defined. This 'Perspective' article focuses on two classes of these non-classical zinc finger proteins: Cys(3)His type zinc finger proteins and Cys(2)His(2)Cys type zinc finger proteins. These proteins bind zinc in a tetrahedral geometry, like the classical zinc finger proteins, yet they adopt completely different folds and target different oligonucleotides. Our current understanding of the relationships between ligand set, metal ion, fold and function for these non-classical zinc fingers is discussed.
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Affiliation(s)
- Jamie L Michalek
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, Baltimore, Maryland 21201-1180, USA
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29
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Timerbaev A, Pawlak K, Gabbiani C, Messori L. Recent progress in the application of analytical techniques to anticancer metallodrug proteomics. Trends Analyt Chem 2011. [DOI: 10.1016/j.trac.2011.03.007] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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30
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Zhao P, Huang JW, Ji LN. Metal complexes of porphyrin–anthraquinone hybrids: DNA binding and photocleavage specificities. J COORD CHEM 2011. [DOI: 10.1080/00958972.2011.585641] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Ping Zhao
- a School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University , No. 280, Waihuandong Road, Education Mega Centre, Guangzhou 510006 , P.R. China
| | - Jin-Wang Huang
- b MOE Laboratory of Bioinorganic and Synthetic Chemistry , School of Chemistry and Chemical Engineering, Sun Yat-Sen University , No. 135, Xingangxi Road, Guangzhou 510275 , P.R. China
| | - Liang-Nian Ji
- b MOE Laboratory of Bioinorganic and Synthetic Chemistry , School of Chemistry and Chemical Engineering, Sun Yat-Sen University , No. 135, Xingangxi Road, Guangzhou 510275 , P.R. China
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31
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Yang B, Zhu Y, Wang Y, Chen G. Interaction identification of Zif268 and TATA(ZF) proteins with GC-/AT-rich DNA sequence: A theoretical study. J Comput Chem 2011; 32:416-28. [PMID: 20658568 DOI: 10.1002/jcc.21630] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Molecular dynamics (MD) simulations for Zif268 (a zinc-finger-protein binding specifically to the GC-rich DNA)-d(A(1) G(2) C(3) G(4) T(5) G(6) G(7) G(8) C(9) A(10) C(11) )(2) and TATA(ZF) (a zinc-finger-protein recognizing the AT-rich DNA)-d(A(1) C(2) G(3) C(4) T(5) A(6) T(7) A(8) A(9) A(10) A(11) G(12) G(13) )(2) complexes have been performed for investigating the DNA binding affinities and specific recognitions of zinc fingers to GC-rich and AT-rich DNA sequences. The binding free energies for the two systems have been further analyzed by using the molecular mechanics Poisson-Boltzmann surface area (MM-PBSA) method. The calculations of the binding free energies reveal that the affinity energy of Zif268-DNA complex is larger than that of TATA(ZF) -DNA one. The affinity between the zinc-finger-protein and DNA is mainly driven by more favorable van-der-Waals and nonpolar/solvation interactions in both complexes. However, the affinity energy difference of the two binding systems is mainly caused by the difference of van-der-Waals interactions and entropy components. The decomposition analysis of MM-PBSA free energies on each residue of the proteins predicts that the interactions between the residues with the positive charges and DNA favor the binding process; while the interactions between the residues with the negative charges and DNA behave in the opposite way. The interhydrogen-bonds at the protein-DNA interface and the induced intrafinger hydrogen bonds between the residues of protein for the Zif268-DNA complex have been identified at some key contact sites. However, only the interhydrogen-bonds between the residues of protein and DNA for TATA(ZF) -DNA complex have been found. The interactions of hydrogen-bonds, electrostatistics and van-der-Waals type at some new contact sites have been identified. Moreover, the recognition characteristics of the two studied zinc-finger-proteins have also been discussed.
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Affiliation(s)
- Bo Yang
- College of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China
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32
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Mendes F, Groessl M, Nazarov AA, Tsybin YO, Sava G, Santos I, Dyson PJ, Casini A. Metal-Based Inhibition of Poly(ADP-ribose) Polymerase − The Guardian Angel of DNA. J Med Chem 2011; 54:2196-206. [DOI: 10.1021/jm2000135] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Filipa Mendes
- Unidade de Ciências Químicas e Radiofarmacêuticas, Instituto Tecnológico e Nuclear, Estrada Nacional 10, 2686-953 Sacavém, Portugal
| | - Michael Groessl
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Alexey A. Nazarov
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Yury O. Tsybin
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Gianni Sava
- Callerio Foundation Onlus, Via A. Fleming 22-31, 34127 Trieste, Italy
| | - Isabel Santos
- Unidade de Ciências Químicas e Radiofarmacêuticas, Instituto Tecnológico e Nuclear, Estrada Nacional 10, 2686-953 Sacavém, Portugal
| | - Paul J. Dyson
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Angela Casini
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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33
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Pannetier F, Ohanessian G, Frison G. Comparison between α- and β-carbonic anhydrases: can Zn(His)3(H2O) and Zn(His)(Cys)2(H2O) sites lead to equivalent enzymes? Dalton Trans 2011; 40:2696-8. [PMID: 21298147 DOI: 10.1039/c0dt01454k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Large models of α- and β-carbonic anhydrases were compared using DFT calculations. They indicate similar acidity of the coordinated water molecule and zinc affinity. This explains their similar mechanism of action, despite the wide difference in their first coordination sphere.
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Affiliation(s)
- Florent Pannetier
- Laboratoire des Mécanismes Réactionnels, Département de Chimie, Ecole Polytechnique and CNRS, 91128 Palaiseau Cedex, France
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34
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Quintal SM, dePaula QA, Farrell NP. Zinc finger proteins as templates for metal ion exchange and ligand reactivity. Chemical and biological consequences. Metallomics 2011; 3:121-39. [PMID: 21253649 DOI: 10.1039/c0mt00070a] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Zinc finger reactions with inorganic ions and coordination compounds are as diverse as the zinc fingers themselves. Use of metal ions such as Co(2+) and Cd(2+) has given structural, thermodynamic and kinetic information on zinc fingers and zinc-finger-DNA/RNA interactions. It is a general truism that alteration of the coordination sphere in the finger environment will disrupt the recognition with DNA/RNA and this has implications for mechanism of toxicity and carcinogenesis of metal ions. Structural zinc fingers are susceptible to electrophilic attack and the recognition that the coordination sphere of inorganic compounds may be modulated for control of electrophilic attack on zinc fingers raises the possibility of systematic studies of zinc fingers as drug targets using inorganic chemistry. Some inorganic compounds such as those of As(III) and Au(I) may exert their biological effects through inactivation of zinc fingers and novel approaches to specifically attack the zinc-bound ligands using Co(III)-Schiff bases and Platinum(II)-Nucleobase compounds have been proposed. The genomic importance of zinc fingers suggests that the "coordination chemistry" of zinc fingers themselves is ripe for exploration to design new targets for medicinal inorganic chemistry.
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Affiliation(s)
- Susana M Quintal
- Department of Chemistry, Virginia Commonwealth University, 1001 W. Main St., Richmond, VA 23284-2006, USA
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35
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Hsieh CH, Chupik RB, Brothers SM, Hall MB, Darensbourg MY. cis-Dithiolatonickel as metalloligand to dinitrosyl iron units: the di-metallic structure of Ni(μ-SR)[Fe(NO)2] and an unexpected, abbreviated metalloadamantyl cluster, Ni2(μ-SR)4[Fe(NO)2]3. Dalton Trans 2011; 40:6047-53. [DOI: 10.1039/c1dt10438a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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36
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Alternative syntheses and reactivity of platinum(II) terpyridyl acetonitrile complexes. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.05.060] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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37
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Zhao P, Huang JW, Mei WJ, He J, Ji LN. DNA binding and photocleavage specificities of a group of tricationic metalloporphyrins. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2010; 75:1108-1114. [PMID: 20093071 DOI: 10.1016/j.saa.2009.12.065] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2009] [Revised: 12/21/2009] [Accepted: 12/22/2009] [Indexed: 05/28/2023]
Abstract
The interactions of 5,10,15-tris(1-methylpyridinium-4-yl)-20-(4-hydroxyphenyl)porphyrinatozinc(II) Zn[TMPyHP](3+) (2) along with Cu[TMPyHP](3+) (3), Co[TMPyHP](4+) (4), Mn[TMPyHP](4+) (5) and the free base porphyrin H(2)[TMPyHP](3+) (1) with duplex DNA have been studied by using a combination of absorption, fluorescence titration, surface-enhanced Raman spectroscopy (SERS), induced circular dichroism (ICD) spectroscopy, thermal DNA denaturation, viscosity measurements as well as gel electrophoresis experiment. Their binding modes and intrinsic binding constants (K(b)) to calf DNA (CT DNA) were comparatively studied and were found significantly influenced by different metals coordinated with the porphyrin plane. Except 3, which has four-coordination structure at the metal, all the metal derivatives showed non-intercalative DNA-binding mode and lower K(b) than the free base porphyrin 1, most probably due to the steric hindrance results from the axial ligands of the inserted metals which are five or six-coordination structures. Meanwhile, the insertion of metals into cationic porphyrin greatly removed the self-aggregation of the metal-free porphyrins, and thus fully enhanced the singlet oxygen ((1)O(2)) productivities in the DNA photocleavage experiments. Therefore, these metalloporphyrins have comparable DNA cleavage ability with the free base porphyrin.
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Affiliation(s)
- Ping Zhao
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, PR China
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38
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Maurmann L, Bose RN. Unwinding of zinc finger domain of DNA polymerase I by cis-diamminedichloroplatinum(ii). Dalton Trans 2010; 39:7968-79. [DOI: 10.1039/c0dt00274g] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Zinc finger proteins as templates for metal ion exchange: Substitution effects on the C-finger of HIV nucleocapsid NCp7 using M(chelate) species (M=Pt, Pd, Au). J Inorg Biochem 2009; 103:1347-54. [PMID: 19692125 DOI: 10.1016/j.jinorgbio.2009.07.002] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2009] [Revised: 06/30/2009] [Accepted: 07/03/2009] [Indexed: 11/23/2022]
Abstract
The interactions of monofunctional [MCl(chelate)] compounds (M=Pt(II), Pd(II) or Au(III) and chelate=diethylenetriamine, dien or 2,2',2''-terpyridine, terpy) with the C-terminal finger of the HIV nucleocapsid NCp7 zinc finger (ZF) were studied by mass spectrometry and circular dichroism spectroscopy. In the case of [M(dien)] species, Pt(II) and Pd(II) behaved in a similar fashion with evidence of adducts caused by displacement of Pt-Cl or Pd-Cl by zinc-bound thiolate. Labilization, presumably under the influence of the strong trans influence of thiolate, resulted in loss of ligand (dien) as well as zinc ejection and formation of species with only Pd(II) or Pt(II) bound to the finger. For both Au(III) compounds the reactions were very fast and only "gold fingers" with no ancillary ligands were observed. For all terpyridine compounds ligand scrambling and metal exchange occurred with formation of [Zn(terpy)](2+). The results conform well to those proposed from the study of model Zn compounds such as N,N'-bis(2-mercapto-ethyl)-1,4-diazacycloheptanezinc(II), [Zn(bme-dach)](2). The possible structures of the adducts formed are discussed and, for Pt(II) and Pd(II), the evidence for possible expansion of the zinc coordination sphere from four- to five-coordinate is discussed. This observation reinforces the possibility of change in geometry for zinc in biology, even in common "structural" sites in metalloenzymes. The results further show that the extent and rate of zinc displacement by inorganic compounds can be modulated by the nature (metal, ligands) of the reacting compound.
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40
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Green KN, Brothers SM, Lee B, Darensbourg MY, Rockcliffe DA. Chemical issues addressing the construction of the distal Ni[cysteine-glycine-cysteine]2- site of acetyl CoA synthase: why not copper? Inorg Chem 2009; 48:2780-92. [PMID: 19253985 DOI: 10.1021/ic801628r] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The discovery of the metallopeptide Ni(Cysteine-Glycine-Cysteine)(2-), Ni(CGC)(2-), in the A-cluster active site of Acetyl CoA Synthase has prompted the synthesis of many small molecule models which employ M(N(2)S(2)) complexes as metalloligands. In vitro studies have shown that nickel incorporates into the N(2)S(2) binding pocket even when copper is in the enzyme growth medium, while copper is preferentially taken up in the proximal site, displacing the catalytically active nickel. (Darnault, C.; Volbeda, A.; Kim, E.J.; Legrand, P.; Vernede, X.; Lindahl, P.A.; Fontecilla-Camps, J.C. Nat. Struct. Biol. 2003, 10, 271-279.) The work herein has been designed to address the chemical viability of copper(II) within the tripeptide N(2)S(2) ligand set. To this end, a series of CuN(2)S(2)(2-) complexes, the resin-bound, O-Cu(CGC)(2-) (A) and free Cu(CGC)(2-) (B) complexes, as well as Cu(ema)(2-) (C) and Cu(emi)(2-) (D) dianions, have been characterized by UV-vis, electron paramagnetic resonance (EPR), and electrospray ionization mass spectrometry (ESI-MS) spectroscopies, cyclic voltammetry (CV), and, where appropriate, X-ray diffraction studies, and compared to the Ni(II) congeners. EPR spectroscopic results have indicated that, in frozen N,N-dimethylformamide (DMF) solution, the copper complexes are distorted square planar structures with nitrogen and sulfur donors. This is consistent with X-ray diffraction measurements which also show copper(II) in a distorted square planar environment that is bereft of CuN(2)S(2)(2-) intermolecular interactions. Density-functional theory (DFT) calculations resulted in optimized structures that are consistent with crystallographic data and indicated highest occupied molecular orbital (HOMO)-singly occupied molecular orbital (SOMO) gaps of 5.01 and 4.68 eV for C and D, respectively. Optimized structures of Ni(ema)(2-) and Ni(emi)(2-) share the same basic characteristics as the copper(II) congeners. Electrochemical characterization of C and D resulted in a reversible Cu(III/II) couple at -1.20 V and - 1.40 V, respectively. Reactivity studies with Rh(CO)(2)(+) show similar donor capabilities for complexes A-D. Analysis of A shows that transmetalation does not occur. From competitive metal uptake studies on immobilized tripeptide it is concluded that the N(2)S(2)(4-) ligating unit has a slight preference for Cu(2+) over Ni(2+) and that the biosynthetic pathway responsible for constructing the distal site of ACS must be selective for nickel insertion or copper exclusion, or both.
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Affiliation(s)
- Kayla N Green
- Department of Chemistry, Texas A&M University, College Station, Texas 77845, USA
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41
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Cummings SD. Platinum complexes of terpyridine: Interaction and reactivity with biomolecules. Coord Chem Rev 2009. [DOI: 10.1016/j.ccr.2008.12.009] [Citation(s) in RCA: 104] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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42
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Abstract
Substitution of NH(3) by a range of amines in trans-[PtCl(2)(NH(3))(2)] produces compounds with cytotoxicity significantly improved over the parent transplatin and in many cases equivalent to that of cisplatin. This microreview summarizes the chemistry and biology of trans-platinum compounds containing principally planar amines and succinctly reviews the current status of anticancer relevance of the trans-platinum geometry. The nature of bifunctional DNA adducts (intrastrand, interstrand) is remarkably dependent on the nature of the amine. Further, the stability of monofunctional adducts allows for competitive production of DNA-protein crosslinks and overall the results suggest that the trans-platinum chemotype may offer significant potential for design of selective DNA-protein crosslinking agents. A subset of proteins known to bind to DNA modified by trans-platinum is that comprised of zinc fingers - model studies show the potential for formation of heteronuclear thiolate-bridged species as precedent for zinc displacement from the biomolecule.
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Affiliation(s)
- Sheena M Aris
- Department of Chemistry, Virginia Commonwealth University 1001 W. Main St., Richmond VA 23284-2006
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43
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Naue JA, Toma SH, Bonacin JA, Araki K, Toma HE. Probing the binding of tetraplatinum(pyridyl)porphyrin complexes to DNA by means of surface plasmon resonance. J Inorg Biochem 2009; 103:182-9. [DOI: 10.1016/j.jinorgbio.2008.10.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2008] [Revised: 09/26/2008] [Accepted: 10/06/2008] [Indexed: 10/21/2022]
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44
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Almaraz E, Denny JA, Foley WS, Reibenspies JH, Bhuvanesh N, Darensbourg MY. Zinc/Nickel exchange and ligand cannibalism in N2S2O1,2 donor ligand sets. Dalton Trans 2009:9496-502. [DOI: 10.1039/b914422f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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de Paula QA, Liu Q, Almaraz E, Denny JA, Mangrum JB, Bhuvanesh N, Darensbourg MY, Farrell NP. Reactions of palladium and gold complexes with zinc-thiolate chelates using electrospray mass spectrometry and X-ray diffraction: molecular identification of [Pd(bme-dach)], [Au(bme-dach]+ and [ZnCl(bme-dach)]2Pd. Dalton Trans 2009:10896-903. [DOI: 10.1039/b917748p] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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Karotki AV, Vasák M. Interaction of metallothionein-2 with platinum-modified 5'-guanosine monophosphate and DNA. Biochemistry 2008; 47:10961-9. [PMID: 18803406 DOI: 10.1021/bi801253x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Human metallothioneins (MTs), a family of cysteine- and metal-rich metalloproteins, play an important role in the acquired resistance to platinum drugs. MTs occur in the cytosol and the nucleus of the cells and sequester platinum drugs through interaction with their zinc-thiolate clusters. Herein, we investigate the ability of human Zn 7MT-2 to form DNA-Pt-MT cross-links using the cisplatin- and transplatin-modified plasmid DNA pSP73. Immunochemical analysis of MT-2 showed that the monofunctional platinum-DNA adducts formed DNA- cis/ trans-Pt-MT cross-links and that platinated MT-2 was released from the DNA- trans-Pt-MT cross-links with time. The DNA- cis/ trans-Pt-MT cross-links were also formed in the presence of 2 mM glutathione, a strong S-donor ligand. Independently, we used 5'-guanosine monophosphate (5'-GMP) platinated at the N7 position as a model of monofunctional platinum-DNA adducts. Comparison of reaction kinetics revealed that the formation of ternary complexes between Zn 7MT-2 and cis-Pt-GMP was faster than that of the trans isomer. The analysis of the reaction products with time showed that while the formation of ternary GMP- trans-Pt-MT complex(es) is accompanied by 5'-GMP release, a stable ternary GMP- cis-Pt-MT complex is formed. In the latter complex, a fast initial formation of two Pt-S bonds was followed by a slow formation of an additional Pt-S bond yielding an unusual Pt(II)S 3N coordination with N7-GMP as the only N-donor ligand. The ejection of negligible zinc from the zinc-thiolate clusters implies the initial formation of Zn-(mu-SCys)-Pt bridges involving the terminal thiolate ligands. The biological implications of these studies are discussed.
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Affiliation(s)
- Andrei V Karotki
- Department of Biochemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
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Picot D, Ohanessian G, Frison G. Thermodynamic Stability Versus Kinetic Lability of ZnS4Core. Chem Asian J 2008; 5:1445-54. [DOI: 10.1002/asia.200900624] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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