1
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Dasmahapatra U, Maiti B, Alam MM, Chanda K. Anti-cancer property and DNA binding interaction of first row transition metal complexes: A decade update. Eur J Med Chem 2024; 275:116603. [PMID: 38936150 DOI: 10.1016/j.ejmech.2024.116603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 06/12/2024] [Accepted: 06/13/2024] [Indexed: 06/29/2024]
Abstract
Metal ions carry out a wide variety of functions, including acid-base/redox catalysis, structural functions, signaling, and electron transport. Understanding the interactions of transition metal complexes with biomacromolecules is essential for biology, medicinal chemistry, and the production of synthetic metalloenzymes. After the coincidental discovery of cisplatin, importance of the metal complexes in biochemistry became a top priority for inquiry. In this review, a decade update on various synthetic strategies to first row transition metal complex and their interaction with DNA through non-covalent binding are explored. Moreover, this effort provides an excellent analysis on the efficacy of theoretical and practical approaches to the systematic generation of new non-platinum based metallodrugs for anti-cancer therapeutics.
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Affiliation(s)
- Upala Dasmahapatra
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, 632014, India
| | - Barnali Maiti
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, 632014, India.
| | - Mohammed Mujahid Alam
- Department of Chemistry, College of Science, King Khalid University, P.O. Box 9004, Abha, 61413, Saudi Arabia
| | - Kaushik Chanda
- Department of Chemistry, Rabindranath Tagore University, Hojai, Assam, 782435, India.
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2
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Jaiswal MK, Gupta A, Ansari FJ, Pandey VK, Tiwari VK. Recent Progress on Synthesis of Functionalized 1,5-Disubstituted Triazoles. Curr Org Synth 2024; 21:513-558. [PMID: 38804327 DOI: 10.2174/1570179420666230418123350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 12/13/2022] [Accepted: 01/12/2023] [Indexed: 05/29/2024]
Abstract
Immediately after the invention of 'Click Chemistry' in 2002, the regioselective 1,2,3- triazole scaffolds resulted from respective organic azides and terminal alkynes under Cu(I) catalysis have been well recognized as the functional heterocyclic core at the centre of modern organic chemistry, medicinal chemistry, and material sciences. This CuAAC reaction has several notable features including excellent regioselectivity, high-to-excellent yields, easy to execute, short reaction time, modular in nature, mild condition, readily available starting materials, etc. Moreover, the resulting regioselective triazoles can serve as amide bond isosteres, a privileged functional group in drug discovery and development. More than hundreds of reviews had been devoted to the 'Click Chemistry' in special reference to 1,4-disubstituted triazoles, while only little efforts were made for an opposite regioisomer i.e., 1,5-disubstituted triazole. Herein, we have presented various classical approaches for an expeditious synthesis of a wide range of biologically relevant 1,5- disubstituted 1,2,3-triazole analogues. The syntheses of such a class of diversly functionalized triazoles have emerged as a crucial investigation in the domain of chemistry and biology. This tutorial review covers the literature assessment on the development of various synthetic protocols for the functionalized 1,5-disubstituted triazoles reported during the last 12 years.
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Affiliation(s)
- Manoj K Jaiswal
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Abhishek Gupta
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Faisal J Ansari
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Vinay K Pandey
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Vinod K Tiwari
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
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3
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Abujubara H, Hintzen JCJ, Rahimi S, Mijakovic I, Tietze D, Tietze AA. Substrate-derived Sortase A inhibitors: targeting an essential virulence factor of Gram-positive pathogenic bacteria. Chem Sci 2023; 14:6975-6985. [PMID: 37389257 PMCID: PMC10306101 DOI: 10.1039/d3sc01209c] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 05/30/2023] [Indexed: 07/01/2023] Open
Abstract
The bacterial transpeptidase Sortase A (SrtA) is a surface enzyme of Gram-positive pathogenic bacteria. It has been shown to be an essential virulence factor for the establishment of various bacterial infections, including septic arthritis. However, the development of potent Sortase A inhibitors remains an unmet challenge. Sortase A relies on a five amino acid sorting signal (LPXTG), by which it recognizes its natural target. We report the synthesis of a series of peptidomimetic inhibitors of Sortase A based on the sorting signal, supported by computational binding analysis. By employing a FRET-compatible substrate, our inhibitors were assayed in vitro. Among our panel, we identified several promising inhibitors with IC50 values below 200 μM, with our strongest inhibitor - LPRDSar - having an IC50 of 18.9 μM. Furthermore, it was discovered that three of our compounds show an effect on growth and biofilm inhibition of pathogenic Staphylococcus aureus, with the inclusion of a phenyl ring seemingly key to this effect. The most promising compound in our panel, BzLPRDSar, could inhibit biofilm formation at concentrations as low as 32 μg mL-1, manifesting it as a potential future drug lead. This could lead to treatments for MRSA infections in clinics and diseases such as septic arthritis, which has been directly linked with SrtA.
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Affiliation(s)
- Helal Abujubara
- Department of Chemistry and Molecular Biology, Wallenberg Centre for Molecular and Translational Medicine, University of Gothenburg Kemigården 4 412 96 Göteborg Sweden
| | - Jordi C J Hintzen
- Department of Chemistry and Molecular Biology, Wallenberg Centre for Molecular and Translational Medicine, University of Gothenburg Kemigården 4 412 96 Göteborg Sweden
| | - Shadi Rahimi
- Division of Systems & Synthetic Biology, Department of Biology and Biological Engineering, Chalmers University of Technology Kemivägen 10 412 96 Göteborg Sweden
| | - Ivan Mijakovic
- Division of Systems & Synthetic Biology, Department of Biology and Biological Engineering, Chalmers University of Technology Kemivägen 10 412 96 Göteborg Sweden
- The Novo Nordisk Foundation, Center for Biosustainability, Technical University of Denmark DK-2800 Kongens Lyngby Denmark
| | - Daniel Tietze
- Department of Chemistry and Molecular Biology, Wallenberg Centre for Molecular and Translational Medicine, University of Gothenburg Kemigården 4 412 96 Göteborg Sweden
| | - Alesia A Tietze
- Department of Chemistry and Molecular Biology, Wallenberg Centre for Molecular and Translational Medicine, University of Gothenburg Kemigården 4 412 96 Göteborg Sweden
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4
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Functional Conversion of Acetyl-Coenzyme a Synthase to a Nickel Superoxide Dismutase via Rational Design of Coordination Microenvironment for the Ni d-Site. Int J Mol Sci 2022; 23:ijms23052652. [PMID: 35269794 PMCID: PMC8910529 DOI: 10.3390/ijms23052652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 02/19/2022] [Accepted: 02/21/2022] [Indexed: 02/01/2023] Open
Abstract
The Nid site coordination microenvironment of a truncated acetyl-coenzyme A synthase has been designed systematically for functional conversion to a Ni-SOD-like enzyme. To this end, the first strategy is to introduce an axial histidine ligand, using mutations F598H, S594H and S594H-GP individually. The resulting three mutants obtained Ni-SOD-like activity successfully, although the catalytic activity was about 10-fold lower than in native Ni-SOD. The second strategy is to mimic the H-bond network in the second sphere coordination microenvironment of the native Ni-SOD. Two mutations based on F598H (EFG-F598H and YGP-F598H) were designed. The successful EFG-F598H exhibited ~3-fold Ni-SOD-like activity of F598H. These designed Ni-SOD-like metalloproteins were characterized by UV/Vis, EPR and Cyclic voltammetry while F598H was also characterized by X-ray protein crystallography. The pH titrations were performed to reveal the source of the two protons required for forming H2O2 in the SOD catalytic reaction. Based on all of the results, a proposed catalytic mechanism for the Ni-SOD-like metalloproteins is presented.
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5
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Grob N, Schibli R, Béhé M, Valverde IE, Mindt TL. 1,5-Disubstituted 1,2,3-Triazoles as Amide Bond Isosteres Yield Novel Tumor-Targeting Minigastrin Analogs. ACS Med Chem Lett 2021; 12:585-592. [PMID: 33859799 PMCID: PMC8040048 DOI: 10.1021/acsmedchemlett.0c00636] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 03/08/2021] [Indexed: 12/12/2022] Open
Abstract
1,5-Disubstituted 1,2,3-triazoles (1,5-Tz) are considered bioisosteres of cis-amide bonds. However, their use for enhancing the pharmacological properties of peptides or proteins is not yet well established. Aiming to illustrate their utility, we chose the peptide conjugate [Nle15]MG11 (DOTA-dGlu-Ala-Tyr-Gly-Trp-Nle-Asp-Phe-NH2) as a model compound since it is known that the cholecystokinin-2 receptor (CCK2R) is able to accommodate turn conformations. Analogs of [Nle15]MG11 incorporating 1,5-Tz in the backbone were synthesized and radiolabeled with lutetium-177, and their pharmacological properties (cell internalization, receptor binding affinity and specificity, plasma stability, and biodistribution) were evaluated and compared with [Nle15]MG11 as well as their previously reported analogs bearing 1,4-disubstituted 1,2,3-triazoles. Our investigations led to the discovery of novel triazole-modified analogs of [Nle15]MG11 with nanomolar CCK2R-binding affinity and 2-fold increased tumor uptake. This study illustrates that substitution of amides by 1,5-disubstituted 1,2,3-triazoles is an effective strategy to enhance the pharmacological properties of biologically active peptides.
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Affiliation(s)
- Nathalie
M. Grob
- Department
of Chemistry and Applied Biosciences, ETH
Zurich, 8093 Zürich, Switzerland
| | - Roger Schibli
- Department
of Chemistry and Applied Biosciences, ETH
Zurich, 8093 Zürich, Switzerland
- Center
for Radiopharmaceutical Sciences, Division of Biology and Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - Martin Béhé
- Center
for Radiopharmaceutical Sciences, Division of Biology and Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - Ibai E. Valverde
- Institut
de Chimie Moléculaire de l’Université de Bourgogne,
UMR CNRS 6302, Université de Bourgogne Franche-Comté, 21000 Dijon, France
| | - Thomas L. Mindt
- Ludwig
Boltzmann Institute Applied Diagnostics, General Hospital of Vienna, 1090 Vienna, Austria
- Department
of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, 1090 Vienna, Austria
- Department
of Biomedical Imaging and Image Guided Therapy, Medical University of Vienna, 1090 Vienna, Austria
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6
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Rečnik LM, Kandioller W, Mindt TL. 1,4-Disubstituted 1,2,3-Triazoles as Amide Bond Surrogates for the Stabilisation of Linear Peptides with Biological Activity. Molecules 2020; 25:E3576. [PMID: 32781656 PMCID: PMC7465391 DOI: 10.3390/molecules25163576] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 08/03/2020] [Accepted: 08/04/2020] [Indexed: 12/20/2022] Open
Abstract
Peptides represent an important class of biologically active molecules with high potential for the development of diagnostic and therapeutic agents due to their structural diversity, favourable pharmacokinetic properties, and synthetic availability. However, the widespread use of peptides and conjugates thereof in clinical applications can be hampered by their low stability in vivo due to rapid degradation by endogenous proteases. A promising approach to circumvent this potential limitation includes the substitution of metabolically labile amide bonds in the peptide backbone by stable isosteric amide bond mimetics. In this review, we focus on the incorporation of 1,4-disubstituted 1,2,3-triazoles as amide bond surrogates in linear peptides with the aim to increase their stability without impacting their biological function(s). We highlight the properties of this heterocycle as a trans-amide bond surrogate and summarise approaches for the synthesis of triazole-containing peptidomimetics via the Cu(I)-catalysed azide-alkyne cycloaddition (CuAAC). The impacts of the incorporation of triazoles in the backbone of diverse peptides on their biological properties such as, e.g., blood serum stability and affinity as well as selectivity towards their respective molecular target(s) are discussed.
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Affiliation(s)
- Lisa-Maria Rečnik
- Ludwig Boltzmann Institute Applied Diagnostics, General Hospital Vienna, 1090 Vienna, Austria;
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, 1090 Vienna, Austria;
- Department of Biomedical Imaging and Image Guided Therapy, Division of Nuclear Medicine, Medical University of Vienna, 1090 Vienna, Austria
| | - Wolfgang Kandioller
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, 1090 Vienna, Austria;
| | - Thomas L. Mindt
- Ludwig Boltzmann Institute Applied Diagnostics, General Hospital Vienna, 1090 Vienna, Austria;
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, 1090 Vienna, Austria;
- Department of Biomedical Imaging and Image Guided Therapy, Division of Nuclear Medicine, Medical University of Vienna, 1090 Vienna, Austria
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7
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Said Stålsmeden A, Paterson AJ, Szigyártó IC, Thunberg L, Johansson JR, Beke-Somfai T, Kann N. Chiral 1,5-disubstituted 1,2,3-triazoles - versatile tools for foldamers and peptidomimetic applications. Org Biomol Chem 2020; 18:1957-1967. [PMID: 32101244 DOI: 10.1039/d0ob00168f] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
1,4- and 1,5-Disubstituted triazole amino acid monomers have gained increasing interest among peptidic foldamers, as they are easily prepared via Cu- and Ru-catalyzed click reactions, with the potential for side chain variation. While the latter is key to their applicability, the synthesis and structural properties of the chiral mono- or disubstituted triazole amino acids have only been partially addressed. We here present the synthesis of all eight possible chiral derivatives of a triazole monomer prepared via a ruthenium-catalyzed azide alkyne cycloaddition (RuAAC). To evaluate the conformational properties of the individual building units, a systematic quantum chemical study was performed on all monomers, indicating their capacity to form several low energy conformers. This feature may be used to effect structural diversity when the monomers are inserted into various peptide sequences. We envisage that these results will facilitate new applications for these artificial oligomeric compounds in diverse areas, ranging from pharmaceutics to biotechnology.
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Affiliation(s)
- Anna Said Stålsmeden
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-41296 Göteborg, Sweden.
| | - Andrew J Paterson
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-41296 Göteborg, Sweden.
| | - Imola Cs Szigyártó
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok krt. 2, H-1117 Budapest, Hungary.
| | - Linda Thunberg
- Early Chemical Development, Pharmaceutical Sciences, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Johan R Johansson
- Medicinal Chemistry, Research and Early Development Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden.
| | - Tamás Beke-Somfai
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok krt. 2, H-1117 Budapest, Hungary.
| | - Nina Kann
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-41296 Göteborg, Sweden.
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8
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Domergue J, Pécaut J, Proux O, Lebrun C, Gateau C, Le Goff A, Maldivi P, Duboc C, Delangle P. Mononuclear Ni(II) Complexes with a S3O Coordination Sphere Based on a Tripodal Cysteine-Rich Ligand: pH Tuning of the Superoxide Dismutase Activity. Inorg Chem 2019; 58:12775-12785. [PMID: 31545024 DOI: 10.1021/acs.inorgchem.9b01686] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The superoxide dismutase (SOD) activity of mononuclear NiII complexes, whose structures are inspired by the NiSOD, has been investigated. They have been designed with a sulfur-rich pseudopeptide ligand, derived from nitrilotriacetic acid (NTA), where the three acid functions are grafted with cysteines (L3S). Two mononuclear complexes, which exist in pH-dependent proportions, have been fully characterized by a combination of spectroscopic techniques including 1H NMR, UV-vis, circular dichroism, and X-ray absorption spectroscopy, together with theoretical calculations. They display similar square-planar S3O coordination, with the three thiolates of the three cysteine moieties from L3S coordinated to the NiII ion, together with either a water molecule at physiological pH, as [NiL3S(OH2)]-, or a hydroxo ion in more basic conditions, as [NiL3S(OH)]2-. The 1H NMR study has revealed that contrary to the hydroxo ligand, the bound water molecule is labile. The cyclic voltammogram of both complexes displays an irreversible one-electron oxidation process assigned to the NiII/NiIII redox system with Epa = 0.48 and 0.31 V versus SCE for NiL3S(OH2) and NiL3S(OH), respectively. The SOD activity of both complexes has been tested. On the basis of the xanthine oxidase assay, an IC50 of about 1 μM has been measured at pH 7.4, where NiL3S(OH2) is mainly present (93% of the NiII species), while the IC50 is larger than 100 μM at pH 9.6, where NiL3S(OH) is the major species (92% of the NiII species). Interestingly, only NiL3S(OH2) displays SOD activity, suggesting that the presence of a labile ligand is required. The SOD activity has been also evaluated under catalytic conditions at pH 7.75, where the ratio between NiL3S(OH2)/ NiL3S(OH) is about (86:14), and a rate constant, kcat = 1.8 × 105 M-1 s-1, has been measured. NiL3S(OH2) is thus the first low-molecular weight, synthetic, bioinspired Ni complex that displays catalytic SOD activity in water at physiological pH, although it does not contain any N-donor ligand in its first coordination sphere, as in the NiSOD. Overall, the data show that a key structural feature is the presence of a labile ligand in the coordination sphere of the NiII ion.
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Affiliation(s)
- Jérémy Domergue
- Univ. Grenoble Alpes, CNRS, DCM , 38000 Grenoble , France.,Univ. Grenoble Alpes, CEA, CNRS, IRIG, SYMMES , 38000 Grenoble , France
| | - Jacques Pécaut
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, SYMMES , 38000 Grenoble , France
| | - Olivier Proux
- Univ. Grenoble Alpes, CNRS, OSUG , 38000 Grenoble , France
| | - Colette Lebrun
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, SYMMES , 38000 Grenoble , France
| | - Christelle Gateau
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, SYMMES , 38000 Grenoble , France
| | - Alan Le Goff
- Univ. Grenoble Alpes, CNRS, DCM , 38000 Grenoble , France
| | - Pascale Maldivi
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, SYMMES , 38000 Grenoble , France
| | - Carole Duboc
- Univ. Grenoble Alpes, CNRS, DCM , 38000 Grenoble , France
| | - Pascale Delangle
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, SYMMES , 38000 Grenoble , France
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9
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Biswas N, Khanra S, Sarkar A, Bhattacharjee S, Prasad Mandal D, Chaudhuri A, Chakraborty S, Roy Choudhury C. Cytotoxicity activity, in silico molecular docking, protein- and DNA-binding study of a new Ni(II) Schiff base complex. J COORD CHEM 2019. [DOI: 10.1080/00958972.2018.1492118] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Niladri Biswas
- Department of Chemistry, West Bengal State University, Kolkata, India
| | - Sumit Khanra
- Department of Chemistry, Indian Institute of Science Education and Research, Mohanpur, Kolkata, West Bengal, India
| | - Arnab Sarkar
- Department of Zoology, West Bengal State University, Kolkata, India
| | | | | | - Ankur Chaudhuri
- Department of Microbiology, West Bengal State University, Kolkata, India
| | - Sibani Chakraborty
- Department of Microbiology, West Bengal State University, Kolkata, India
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10
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Tietze D, Koley Seth B, Brauser M, Tietze AA, Buntkowsky G. NiII
Complex Formation and Protonation States at the Active Site of a Nickel Superoxide Dismutase-Derived Metallopeptide: Implications for the Mechanism of Superoxide Degradation. Chemistry 2018; 24:15879-15888. [DOI: 10.1002/chem.201803042] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Daniel Tietze
- Eduard-Zintl Institute for Physical and Inorganic Chemistry; Darmstadt University of Technology; Alarich-Weiss-Str. 8 64287 Darmstadt Germany), -darmstadt
| | - Banabithi Koley Seth
- Eduard-Zintl Institute for Physical and Inorganic Chemistry; Darmstadt University of Technology; Alarich-Weiss-Str. 8 64287 Darmstadt Germany), -darmstadt
- current address: Department of Chemistry; Durham University; Lower Mountjoy, Stockton Road Durham DH1 3LE United Kingdom
| | - Matthias Brauser
- Eduard-Zintl Institute for Physical and Inorganic Chemistry; Darmstadt University of Technology; Alarich-Weiss-Str. 8 64287 Darmstadt Germany), -darmstadt
| | - Alesia A. Tietze
- Clemens-Schöpf Institute for Organic Chemistry and Biochemistry; Darmstadt University of Technology; Alarich-Weiss-Str. 4 64287 Darmstadt Germany
| | - Gerd Buntkowsky
- Eduard-Zintl Institute for Physical and Inorganic Chemistry; Darmstadt University of Technology; Alarich-Weiss-Str. 8 64287 Darmstadt Germany), -darmstadt
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11
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Truong PT, Gale EM, Dzul SP, Stemmler TL, Harrop TC. Steric Enforcement about One Thiolate Donor Leads to New Oxidation Chemistry in a NiSOD Model Complex. Inorg Chem 2017; 56:7761-7780. [PMID: 28459242 DOI: 10.1021/acs.inorgchem.7b00485] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ni-containing superoxide dismutase (NiSOD) represents an unusual member of the SOD family due to the presence of oxygen-sensitive Ni-SCys bonds at its active site. Reported in this account is the synthesis and properties of the NiII complex of the N3S2 ligand [N3S2Me2]3- ([N3S2Me2]3- = deprotonated form of 2-((2-mercapto-2-methylpropyl)(pyridin-2-ylmethyl)amino)-N-(2-mercaptoethyl)acetamide), namely Na[Ni(N3S2Me2)] (2), as a NiSOD model that features sterically robust gem-(CH3)2 groups on the thiolate α-C positioned trans to the carboxamide. The crystal structure of 2, coupled with spectroscopic measurements from 1H NMR, X-ray absorption, IR, UV-vis, and mass spectrometry (MS), reveal a planar NiII (S = 0) ion coordinated by only the N2S2 basal donors of the N3S2 ligand. While the structure and spectroscopic properties of 2 resemble those of NiSODred and other models, the asymmetric S ligands open up new reaction paths upon chemical oxidation. One unusual oxidation product is the planar NiII-N3S complex [Ni(Lox)] (5; Lox = 2-(5,5-dimethyl-2-(pyridin-2-yl)thiazolidin-3-yl)-N-(2-mercaptoethyl)acetamide), where two-electron oxidation takes place at the substituted thiolate and py-CH2 carbon to generate a thiazolidine heterocycle. Electrochemical measurements of 2 reveal irreversible events wholly consistent with thiolate redox, which were identified by comparison to the ZnII complex Na[Zn(N3S2Me2)] (3). Although no reaction is observed between 2 and azide, reaction of 2 with superoxide produces multiple products on the basis of UV-vis and MS data, one of which is 5. Density functional theory (DFT) computations suggest that the HOMO in 2 is π* with primary contributions from Ni-dπ/S-pπ orbitals. These contributions can be modulated and biased toward Ni when electron-withdrawing groups are placed on the thiolate α-C. Analysis of the oxidized five-coordinate species 2ox* by DFT reveal a singly occupied spin-up (α) MO that is largely thiolate based, which supports the proposed NiIII-thiolate/NiII-thiyl radical intermediates that ultimately yield 5 and other products.
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Affiliation(s)
- Phan T Truong
- Department of Chemistry and Center for Metalloenzyme Studies, The University of Georgia , 140 Cedar Street, Athens, Georgia 30602, United States
| | - Eric M Gale
- Department of Chemistry and Center for Metalloenzyme Studies, The University of Georgia , 140 Cedar Street, Athens, Georgia 30602, United States
| | - Stephen P Dzul
- Departments of Pharmaceutical Sciences, Biochemistry and Molecular Biology, Wayne State University , Detroit, Michigan 48201, United States
| | - Timothy L Stemmler
- Departments of Pharmaceutical Sciences, Biochemistry and Molecular Biology, Wayne State University , Detroit, Michigan 48201, United States
| | - Todd C Harrop
- Department of Chemistry and Center for Metalloenzyme Studies, The University of Georgia , 140 Cedar Street, Athens, Georgia 30602, United States
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12
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Guo Y, Liu C, Song H, Wang FL, Zou Y, Wu QY, Hu HG. Diaminodiacid-based synthesis of macrocyclic peptides using 1,2,3-triazole bridges as disulfide bond mimetics. RSC Adv 2017. [DOI: 10.1039/c6ra26617g] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
A new approach for the efficient construction of 1,2,3-triazole bridges as disulfide surrogates in peptides, utilizing the diaminodiacid strategy was established.
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Affiliation(s)
- Ye Guo
- Department of Organic Chemistry
- College of Pharmacy
- Second Military Medical University
- Shanghai 200433
- China
| | - Chao Liu
- Department of Organic Chemistry
- College of Pharmacy
- Second Military Medical University
- Shanghai 200433
- China
| | - Hui Song
- College of Pharmacy
- Weifang Medical University
- Weifang
- China
| | | | - Yan Zou
- Department of Organic Chemistry
- College of Pharmacy
- Second Military Medical University
- Shanghai 200433
- China
| | - Qiu-Ye Wu
- Department of Organic Chemistry
- College of Pharmacy
- Second Military Medical University
- Shanghai 200433
- China
| | - Hong-Gang Hu
- Department of Organic Chemistry
- College of Pharmacy
- Second Military Medical University
- Shanghai 200433
- China
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13
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Mondal M, Guha PM, Giri S, Ghosh A. Deactivation of catecholase-like activity of a dinuclear Ni(II) complex by incorporation of an additional Ni(II). ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcata.2016.08.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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14
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Johansson JR, Beke-Somfai T, Said Stålsmeden A, Kann N. Ruthenium-Catalyzed Azide Alkyne Cycloaddition Reaction: Scope, Mechanism, and Applications. Chem Rev 2016; 116:14726-14768. [DOI: 10.1021/acs.chemrev.6b00466] [Citation(s) in RCA: 223] [Impact Index Per Article: 27.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Johan R. Johansson
- Cardiovascular
and Metabolic Diseases, Innovative Medicines and Early Development
Biotech Unit, AstraZeneca, Pepparedsleden 1, SE-43183 Mölndal, Sweden
| | - Tamás Beke-Somfai
- Research
Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok
krt. 2, H-1117 Budapest, Hungary
| | - Anna Said Stålsmeden
- Chemistry
and Biochemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-41296 Göteborg, Sweden
| | - Nina Kann
- Chemistry
and Biochemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-41296 Göteborg, Sweden
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15
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Corredor M, Garrido M, Bujons J, Orzáez M, Pérez-Payá E, Alfonso I, Messeguer A. Efficient Synthesis of Conformationally Restricted Apoptosis Inhibitors Bearing a Triazole Moiety. Chemistry 2015; 21:14122-8. [PMID: 26270744 DOI: 10.1002/chem.201502380] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Indexed: 12/14/2022]
Abstract
Apoptosis is a biological process relevant to different human diseases that is regulated through protein-protein interactions and complex formation. Peptidomimetic compounds based on linear peptoids and cyclic analogues with different ring sizes have been previously reported as potent apoptotic inhibitors. Among them, the presence of cis/trans conformers of an exocyclic tertiary amide bond in slow exchange has been characterized. This information encouraged us to perform an isosteric replacement of the amide bond by a 1,2,3-triazole moiety, in which different substitution patterns would mimic different amide rotamers. The syntheses of these restricted analogues have been carried out through an Ugi multicomponent reaction followed by an intramolecular cyclization. The unexpected formation of a β-lactam scaffold prompted us to study the course of the intramolecular cyclization of the Ugi adducts. In order to modulate this cyclization, a small library of compounds bearing both heterocyclic scaffolds has been synthesized and their activities as apoptosis inhibitors have been evaluated.
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Affiliation(s)
- Miriam Corredor
- Dep. Biological Chemistry and Molecular Modeling, Instituto de Química Avanzada de Catalunya (CSIC), C/Jordi Girona 18-26, 08034 Barcelona (Spain)
| | - Maria Garrido
- Dep. Biological Chemistry and Molecular Modeling, Instituto de Química Avanzada de Catalunya (CSIC), C/Jordi Girona 18-26, 08034 Barcelona (Spain)
| | - Jordi Bujons
- Dep. Biological Chemistry and Molecular Modeling, Instituto de Química Avanzada de Catalunya (CSIC), C/Jordi Girona 18-26, 08034 Barcelona (Spain)
| | - Mar Orzáez
- Laboratory of Peptide and Protein Chemistry, Centro de Investigaciones Príncipe Felipe, C/Eduardo Primo Yúfera 3, 46012 Valencia (Spain)
| | - Enrique Pérez-Payá
- Laboratory of Peptide and Protein Chemistry, Centro de Investigaciones Príncipe Felipe, C/Eduardo Primo Yúfera 3, 46012 Valencia (Spain)
| | - Ignacio Alfonso
- Dep. Biological Chemistry and Molecular Modeling, Instituto de Química Avanzada de Catalunya (CSIC), C/Jordi Girona 18-26, 08034 Barcelona (Spain)
| | - Angel Messeguer
- Dep. Biological Chemistry and Molecular Modeling, Instituto de Química Avanzada de Catalunya (CSIC), C/Jordi Girona 18-26, 08034 Barcelona (Spain).
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16
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Broering EP, Dillon S, Gale EM, Steiner RA, Telser J, Brunold TC, Harrop TC. Accessing Ni(III)-thiolate versus Ni(II)-thiyl bonding in a family of Ni-N2S2 synthetic models of NiSOD. Inorg Chem 2015; 54:3815-28. [PMID: 25835183 PMCID: PMC4630978 DOI: 10.1021/ic503124f] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Superoxide dismutase (SOD) catalyzes the disproportionation of superoxide (O2(• -)) into H2O2 and O2(g) by toggling through different oxidation states of a first-row transition metal ion at its active site. Ni-containing SODs (NiSODs) are a distinct class of this family of metalloenzymes due to the unusual coordination sphere that is comprised of mixed N/S-ligands from peptide-N and cysteine-S donor atoms. A central goal of our research is to understand the factors that govern reactive oxygen species (ROS) stability of the Ni-S(Cys) bond in NiSOD utilizing a synthetic model approach. In light of the reactivity of metal-coordinated thiolates to ROS, several hypotheses have been proffered and include the coordination of His1-Nδ to the Ni(II) and Ni(III) forms of NiSOD, as well as hydrogen bonding or full protonation of a coordinated S(Cys). In this work, we present NiSOD analogues of the general formula [Ni(N2S)(SR')](-), providing a variable location (SR' = aryl thiolate) in the N2S2 basal plane coordination sphere where we have introduced o-amino and/or electron-withdrawing groups to intercept an oxidized Ni species. The synthesis, structure, and properties of the NiSOD model complexes (Et4N)[Ni(nmp)(SPh-o-NH2)] (2), (Et4N)[Ni(nmp)(SPh-o-NH2-p-CF3)] (3), (Et4N)[Ni(nmp)(SPh-p-NH2)] (4), and (Et4N)[Ni(nmp)(SPh-p-CF3)] (5) (nmp(2-) = dianion of N-(2-mercaptoethyl)picolinamide) are reported. NiSOD model complexes with amino groups positioned ortho to the aryl-S in SR' (2 and 3) afford oxidized species (2(ox) and 3(ox)) that are best described as a resonance hybrid between Ni(III)-SR and Ni(II)-(•)SR based on ultraviolet-visible (UV-vis), magnetic circular dichroism (MCD), and electron paramagnetic resonance (EPR) spectroscopies, as well as density functional theory (DFT) calculations. The results presented here, demonstrating the high percentage of S(3p) character in the highest occupied molecular orbital (HOMO) of the four-coordinate reduced form of NiSOD (NiSODred), suggest that the transition from NiSODred to the five-coordinate oxidized form of NiSOD (NiSODox) may go through a four-coordinate Ni-(•)S(Cys) (NiSODox-Hisoff) that is stabilized by coordination to Ni(II).
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Affiliation(s)
- Ellen P. Broering
- Department of Chemistry and Center for Metalloenzyme Studies, The University of Georgia, 1001 Cedar Street, Athens, Georgia 30602, United States
| | - Stephanie Dillon
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, United States
| | - Eric M. Gale
- Department of Chemistry and Center for Metalloenzyme Studies, The University of Georgia, 1001 Cedar Street, Athens, Georgia 30602, United States
| | - Ramsey A. Steiner
- Department of Chemistry and Center for Metalloenzyme Studies, The University of Georgia, 1001 Cedar Street, Athens, Georgia 30602, United States
| | - Joshua Telser
- Department of Biological, Chemical and Physical Sciences, Roosevelt University, 430 South Michigan Avenue, Chicago, Illinois 60605, United States
| | - Thomas C. Brunold
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, United States
| | - Todd C. Harrop
- Department of Chemistry and Center for Metalloenzyme Studies, The University of Georgia, 1001 Cedar Street, Athens, Georgia 30602, United States
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17
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Kann N, Johansson JR, Beke-Somfai T. Conformational properties of 1,4- and 1,5-substituted 1,2,3-triazole amino acids – building units for peptidic foldamers. Org Biomol Chem 2015; 13:2776-85. [PMID: 25605623 PMCID: PMC4718141 DOI: 10.1039/c4ob02359e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Accepted: 01/02/2015] [Indexed: 01/22/2023]
Abstract
Peptidic foldamers have recently emerged as a novel class of artificial oligomers with properties and structural diversity similar to that of natural peptides, but possessing additional interesting features granting them great potential for applications in fields from nanotechnology to pharmaceuticals. Among these, foldamers containing 1,4- and 1,5-substitued triazole amino acids are easily prepared via the Cu- and Ru-catalyzed click reactions and may offer increased side chain variation, but their structural capabilities have not yet been widely explored. We here describe a systematic analysis of the conformational space of the two most important basic units, the 1,4-substitued (4Tzl) and the 1,5-substitued (5Tzl) 1,2,3-triazole amino acids, using quantum chemical calculations and NMR spectroscopy. Possible conformations of the two triazoles were scanned and their potential minima were located using several theoretical approaches (B3LYP/6-311++G(2d,2p), ωB97X-D/6-311++G(2d,2p), M06-2X/6-311++G(2d,2p) and MP2/6-311++G(2d,2p)) in different solvents. BOC-protected versions of 4Tzl and 5Tzl were also prepared via one step transformations and analyzed by 2D NOESY NMR. Theoretical results show 9 conformers for 5Tzl derivatives with relative energies lying close to each other, which may lead to a great structural diversity. NMR analysis also indicates that conformers preferring turn, helix and zig-zag secondary structures may coexist in solution. In contrast, 4Tzl has a much lower number of conformers, only 4, and these lack strong intraresidual interactions. This is again supported by NMR suggesting the presence of both extended and bent conformers. The structural information provided on these building units could be employed in future design of triazole foldamers.
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Affiliation(s)
- Nina Kann
- Department of Chemical and Biological Engineering , Chalmers University of Technology , SE-41296 Göteborg , Sweden . ; ; http://www.chalmers.se/chem/ ; Fax: +46-31-7723858 ; Tel: +46 (0)31 772 3029, +46 (0)31 772 3070
| | - Johan R. Johansson
- AstraZeneca R&D Mölndal , RIA IMED , Medicinal Chemistry , SE-43183 Mölndal , Sweden .
| | - Tamás Beke-Somfai
- Department of Chemical and Biological Engineering , Chalmers University of Technology , SE-41296 Göteborg , Sweden . ; ; http://www.chalmers.se/chem/ ; Fax: +46-31-7723858 ; Tel: +46 (0)31 772 3029, +46 (0)31 772 3070
- Research Centre for Natural Sciences , Hungarian Academy of Sciences , Pázmány Péter sétány 1 , H-1125 Budapest , Hungary
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18
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Das M, Nasani R, Saha M, Mobin SM, Mukhopadhyay S. Nickel(ii) complexes with a flexible piperazinyl moiety: studies on DNA and protein binding and catecholase like properties. Dalton Trans 2015; 44:2299-310. [DOI: 10.1039/c4dt02675f] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Nickel complexes with a flexible piperazinyl moiety are showing interesting DNA and protein binding properties and catecholase like activity in the boat conformation.
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Affiliation(s)
- Mriganka Das
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017
- India
| | - Rajendar Nasani
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017
- India
| | - Manideepa Saha
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017
- India
| | - Shaikh M Mobin
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017
- India
| | - Suman Mukhopadhyay
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017
- India
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19
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Sauer G, Nasu D, Tietze D, Gutmann T, Englert S, Avrutina O, Kolmar H, Buntkowsky G. Effective PHIP Labeling of Bioactive Peptides Boosts the Intensity of the NMR Signal. Angew Chem Int Ed Engl 2014; 53:12941-5. [DOI: 10.1002/anie.201404668] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Revised: 07/29/2014] [Indexed: 12/29/2022]
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20
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Sauer G, Nasu D, Tietze D, Gutmann T, Englert S, Avrutina O, Kolmar H, Buntkowsky G. Effektive Markierung von bioaktiven Peptiden mit PHIP-Markern zur Steigerung der Empfindlichkeit von NMR-Signalen. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201404668] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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21
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Chatterjee SK, Maji RC, Barman SK, Olmstead MM, Patra AK. Hexacoordinate nickel(II)/(III) complexes that mimic the catalytic cycle of nickel superoxide dismutase. Angew Chem Int Ed Engl 2014; 53:10184-9. [PMID: 25056843 DOI: 10.1002/anie.201404133] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Revised: 06/03/2014] [Indexed: 11/07/2022]
Abstract
A functional model complex of nickel superoxide dismutase (NiSOD) with a non-peptide ligand which mimics the full catalytic cycle of NiSOD is unknown. Similarly, it has not been fully elucidated whether NiSOD activity is a result of an outer- or inner-sphere electron-transfer mechanism. With this in mind, two octahedral nickel(II)/(III) complexes of a bis-tridentate N2 S donor carboxamide ligand, N-2-phenylthiophenyl-2'-pyridinecarboxamide (HL(Ph)), have been synthesized, structurally characterized, and their SOD activities examined. These complexes mimic the full catalytic cycle of NiSOD. Electrochemical experiments support an outer-sphere electron-transfer mechanism for their SOD activity.
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Affiliation(s)
- Sudip K Chatterjee
- Department of Chemistry, National Institute of Technology Durgapur, Mahatma Gandhi Avenue, Durgapur 713 209 (WB) (India)
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22
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Chatterjee SK, Maji RC, Barman SK, Olmstead MM, Patra AK. Hexacoordinate Nickel(II)/(III) Complexes that Mimic the Catalytic Cycle of Nickel Superoxide Dismutase. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201404133] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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23
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Nakane D, Wasada-Tsutsui Y, Funahashi Y, Hatanaka T, Ozawa T, Masuda H. A Novel Square-Planar Ni(II) Complex with an Amino—Carboxamido—Dithiolato-Type Ligand as an Active-Site Model of NiSOD. Inorg Chem 2014; 53:6512-23. [DOI: 10.1021/ic402574d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Daisuke Nakane
- Department
of Frontier Materials, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan
| | - Yuko Wasada-Tsutsui
- Department
of Frontier Materials, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan
| | - Yasuhiro Funahashi
- Department
of Chemistry, Graduate School of Science, Osaka University, 1-1
Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Tsubasa Hatanaka
- Department
of Chemistry, Graduate School of Science, Osaka University, 1-1
Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Tomohiro Ozawa
- Department
of Frontier Materials, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan
| | - Hideki Masuda
- Department
of Frontier Materials, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan
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24
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Systematic replacement of amides by 1,4-disubstituted[1,2,3]triazoles in Leu-enkephalin and the impact on the delta opioid receptor activity. Bioorg Med Chem Lett 2013; 23:5267-9. [PMID: 23988352 DOI: 10.1016/j.bmcl.2013.08.020] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Revised: 07/25/2013] [Accepted: 08/05/2013] [Indexed: 12/28/2022]
Abstract
Using Cu(I)-catalyzed azide-alkyne cycloaddition in a mixed classical organic phase and solid phase peptide synthesis approach, we synthesized four analogs of Leu-enkephalin to systematically replace amides by 1,4-disubstituted[1,2,3]triazoles. The peptidomimetics obtained were characterized by competitive binding, contractility assays and ERK1/2 phosphorylation. The present study reveals that the analog bearing a triazole between Phe and Leu retains some potency, more than all the others, suggesting that the hydrogen bond acceptor capacity of the last amide of Leu-enkephalin is essential for the biological activity of the peptide.
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25
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Liu Y, Wang Q, Wei Y, Lin YW, Li W, Su JH, Wang Z, Tian Y, Huang ZX, Tan X. Functional conversion of nickel-containing metalloproteins via molecular design: from a truncated acetyl-coenzyme A synthase to a nickel superoxide dismutase. Chem Commun (Camb) 2013; 49:1452-4. [DOI: 10.1039/c2cc38224e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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26
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Yamamoto Y. Syntheses of Heterocycles via Alkyne Cycloadditions Catalyzed by Cyclopentadienylruthenium-Type Complexes. HETEROCYCLES 2013. [DOI: 10.3987/rev-13-783] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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27
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Kotha S, Goyal D, Bitra A, Thota N, Kruger G, Anand R. Diversity oriented approach to triazole based peptidomimetics as mammalian sterile 20 kinase inhibitors. RSC Adv 2013. [DOI: 10.1039/c3ra44318c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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28
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Broering EP, Truong PT, Gale EM, Harrop TC. Synthetic Analogues of Nickel Superoxide Dismutase: A New Role for Nickel in Biology. Biochemistry 2012; 52:4-18. [DOI: 10.1021/bi3014533] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ellen P. Broering
- Department
of Chemistry and Center for Metalloenzyme
Studies, The University of Georgia, 1001
Cedar Street, Athens, Georgia 30602, United States
| | - Phan T. Truong
- Department
of Chemistry and Center for Metalloenzyme
Studies, The University of Georgia, 1001
Cedar Street, Athens, Georgia 30602, United States
| | - Eric M. Gale
- Department
of Chemistry and Center for Metalloenzyme
Studies, The University of Georgia, 1001
Cedar Street, Athens, Georgia 30602, United States
| | - Todd C. Harrop
- Department
of Chemistry and Center for Metalloenzyme
Studies, The University of Georgia, 1001
Cedar Street, Athens, Georgia 30602, United States
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29
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Krause ME, Glass AM, Jackson TA, Laurence JS. Embedding the Ni-SOD mimetic Ni-NCC within a polypeptide sequence alters the specificity of the reaction pathway. Inorg Chem 2012; 52:77-83. [PMID: 23214928 DOI: 10.1021/ic301175f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The unique metal abstracting peptide asparagine-cysteine-cysteine (NCC) binds nickel in a square planar 2N:2S geometry and acts as a mimic of the enzyme nickel superoxide dismutase (Ni-SOD). The Ni-NCC tripeptide complex undergoes rapid, site-specific chiral inversion to dld-NCC in the presence of oxygen. Superoxide scavenging activity increases proportionally with the degree of chiral inversion. Characterization of the NCC sequence within longer peptides with absorption, circular dichroism (CD), and magnetic CD (MCD) spectroscopies and mass spectrometry (MS) shows that the geometry of metal coordination is maintained, though the electronic properties of the complex are varied to a small extent because of bis-amide, rather than amine/amide, coordination. In addition, both Ni-tripeptide and Ni-pentapeptide complexes have charges of -2. This study demonstrates that the chiral inversion chemistry does not occur when NCC is embedded in a longer polypeptide sequence. Nonetheless, the superoxide scavenging reactivity of the embedded Ni-NCC module is similar to that of the chirally inverted tripeptide complex, which is consistent with a minor change in the reduction potential for the Ni-pentapeptide complex. Together, this suggests that the charge of the complex could affect the SOD activity as much as a change in the primary coordination sphere. In Ni-NCC and other Ni-SOD mimics, changes in chirality, superoxide scavenging activity, and oxidation of the peptide itself all depend on the presence of dioxygen or its reduced derivatives (e.g., superoxide), and the extent to which each of these distinct reactions occurs is ruled by electronic and steric effects that emenate from the organization of ligands around the metal center.
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Affiliation(s)
- Mary E Krause
- Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, Kansas 66047, United States
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30
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Tischler M, Nasu D, Empting M, Schmelz S, Heinz DW, Rottmann P, Kolmar H, Buntkowsky G, Tietze D, Avrutina O. Peptid in Ketten: Einblicke in die Struktur-Aktivitäts-Beziehungen von Proteaseinhibitormimetika mit fixierten Amidkonformationen. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201108983] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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31
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Tischler M, Nasu D, Empting M, Schmelz S, Heinz DW, Rottmann P, Kolmar H, Buntkowsky G, Tietze D, Avrutina O. Braces for the peptide backbone: insights into structure-activity relationships of protease inhibitor mimics with locked amide conformations. Angew Chem Int Ed Engl 2012; 51:3708-12. [PMID: 22374650 DOI: 10.1002/anie.201108983] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Indexed: 01/08/2023]
Affiliation(s)
- Marco Tischler
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 22, 64287 Darmstadt, Germany
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32
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Lee WZ, Chiang CW, Lin TH, Kuo TS. A Discrete Five-Coordinate NiIII Complex Resembling the Active Site of the Oxidized Form of Nickel Superoxide Dismutase. Chemistry 2011; 18:50-3. [DOI: 10.1002/chem.201102690] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2011] [Revised: 10/20/2011] [Indexed: 11/08/2022]
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33
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Risse J, Scopelliti R, Severin K. Beyond Click-Chemistry: Transformation of Azides with Cyclopentadienyl Ruthenium Complexes. Organometallics 2011. [DOI: 10.1021/om200295c] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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34
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Empting M, Avrutina O, Meusinger R, Fabritz S, Reinwarth M, Biesalski M, Voigt S, Buntkowsky G, Kolmar H. "Triazole bridge": disulfide-bond replacement by ruthenium-catalyzed formation of 1,5-disubstituted 1,2,3-triazoles. Angew Chem Int Ed Engl 2011; 50:5207-11. [PMID: 21544910 DOI: 10.1002/anie.201008142] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2010] [Revised: 02/21/2011] [Indexed: 12/20/2022]
Affiliation(s)
- Martin Empting
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie, Technische Universität Darmstadt, Petersenstrasse 22, 64287 Darmstadt, Germany
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35
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Empting M, Avrutina O, Meusinger R, Fabritz S, Reinwarth M, Biesalski M, Voigt S, Buntkowsky G, Kolmar H. “Triazolbrücke”: ein Disulfidbrückenersatz durch Ruthenium- katalysierte Bildung von 1,5-disubstituierten 1,2,3-Triazolen. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201008142] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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