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Wezynfeld NE, Bonna AM, Płonka D, Bal W, Frączyk T. Ni(II) Ions May Target the Entire Melatonin Biosynthesis Pathway—A Plausible Mechanism of Nickel Toxicity. Molecules 2022; 27:molecules27175582. [PMID: 36080347 PMCID: PMC9458082 DOI: 10.3390/molecules27175582] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 08/25/2022] [Accepted: 08/28/2022] [Indexed: 11/30/2022] Open
Abstract
Nickel is toxic to humans. Its compounds are carcinogenic. Furthermore, nickel allergy is a severe health problem that affects approximately 10–20% of humans. The mechanism by which these conditions develop remains unclear, but it may involve the cleavage of specific proteins by nickel ions. Ni(II) ions cleave the peptide bond preceding the Ser/Thr-Xaa-His sequence. Such sequences are present in all four enzymes of the melatonin biosynthesis pathway, i.e., tryptophan 5-hydroxylase 1, aromatic-l-amino-acid decarboxylase, serotonin N-acetyltransferase, and acetylserotonin O-methyltransferase. Moreover, fragments prone to Ni(II) are exposed on surfaces of these proteins. Our results indicate that all four studied fragments undergo cleavage within tens of hours at pH 8.2 and 37 °C, corresponding with the conditions in the mitochondrial matrix. Since melatonin, a potent antioxidant and anti-inflammatory agent, is synthesized within the mitochondria of virtually all human cells, depleting its supply may be detrimental, e.g., by raising the oxidative stress level. Intriguingly, Ni(II) ions have been shown to mimic hypoxia through the stabilization of HIF-1α protein, but melatonin prevents the action of HIF-1α. Considering all this, the enzymes of the melatonin biosynthesis pathway seem to be a toxicological target for Ni(II) ions.
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Affiliation(s)
- Nina E. Wezynfeld
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-106 Warsaw, Poland
- Faculty of Chemistry, Warsaw University of Technology, 00-664 Warsaw, Poland
| | - Arkadiusz M. Bonna
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-106 Warsaw, Poland
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1QW, UK
| | - Dawid Płonka
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-106 Warsaw, Poland
| | - Wojciech Bal
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-106 Warsaw, Poland
| | - Tomasz Frączyk
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-106 Warsaw, Poland
- Correspondence:
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Abd Elhameed HAH, Hajdu B, Jancsó A, Kéri A, Galbács G, Hunyadi-Gulyás É, Gyurcsik B. Modulation of the catalytic activity of a metallonuclease by tagging with oligohistidine. J Inorg Biochem 2020; 206:111013. [PMID: 32088594 DOI: 10.1016/j.jinorgbio.2020.111013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 01/23/2020] [Accepted: 01/27/2020] [Indexed: 11/19/2022]
Abstract
Peptide tags are extensively used for affinity purification of proteins. In an optimal case, these tags can be completely removed from the purified protein by a specific protease mediated hydrolysis. However, the interactions of these tags with the target protein may also be utilized for the modulation of the protein function. Here we show that the C-terminal hexahistidine (6 × His) tag can influence the catalytic activity of the nuclease domain of the Colicin E7 metallonuclease (NColE7) used by E. coli to kill competing bacteria under stress conditions. This enzyme non-specifically cleaves the DNA that results in cytotoxicity. We have successfully cloned the genes of NColE7 protein and its R447G mutant into a modified pET-21a DNA vector fusing the affinity tag to the protein upon expression, which would be otherwise not possible in the absence of the gene of the Im7 inhibitory protein. This reflects the inhibitory effect of the 6 × His fusion tag on the nuclease activity, which proved to be a complex process via both coordinative and non-specific steric interactions. The modulatory effect of Zn2+ ion was observed in the catalytic activity experiments. The DNA cleavage ability of the 6 × His tagged enzyme was first enhanced by an increase of metal ion concentration, while high excess of Zn2+ ions caused a lower rate of the DNA cleavage. Modelling of the coordinative effect of the fusion tag by external chelators suggested ternary complex formation instead of removal of the metal ion from the active center.
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Affiliation(s)
- Heba A H Abd Elhameed
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
| | - Bálint Hajdu
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
| | - Attila Jancsó
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
| | - Albert Kéri
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
| | - Gábor Galbács
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
| | - Éva Hunyadi-Gulyás
- Laboratory of Proteomics Research, Biological Research Centre, Temesvári krt. 62, H-6726 Szeged, Hungary
| | - Béla Gyurcsik
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary.
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3
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Mashima K, Nishii Y, Nagae H. Catalytic Cleavage of Amide C-N Bond: Scandium, Manganese, and Zinc Catalysts for Esterification of Amides. CHEM REC 2019; 20:332-343. [PMID: 31507072 DOI: 10.1002/tcr.201900044] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Revised: 08/20/2019] [Indexed: 11/06/2022]
Abstract
Amide C-N bonds are thermodynamically stable and their fission, such as by hydrolysis and alcoholysis, is considered a long-challenging organic reaction. In general, stoichiometric chemical transformations of amides into the corresponding esters and acids require harsh conditions, such as strong acids/bases at a high reaction temperature. Accordingly, the development of catalytic reactions that cleave not only primary and secondary amides, but also tertiary amides in mild conditions, is in high demand. Herein, we surveyed typical stoichiometric transformations of amides, and highlight our recent achievements in the catalytic esterification of amides using scandium, manganese, and zinc catalysts, together with some recent catalyst systems using late-transition metal reported by other groups.
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Affiliation(s)
- Kazushi Mashima
- Department of Chemistry, Graduate School of Engineering Science, Osaka University Toyonaka, Osaka, 560-8531, Japan
| | - Yuji Nishii
- Frontier Research Base for Global Young Researchers, Graduate School of Engineering, Osaka University Suita, Osaka, 565-0871, Japan
| | - Haruki Nagae
- Department of Chemistry, Graduate School of Engineering Science, Osaka University Toyonaka, Osaka, 560-8531, Japan
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Abd Elhameed HAH, Hajdu B, Balogh RK, Hermann E, Hunyadi-Gulyás É, Gyurcsik B. Purification of proteins with native terminal sequences using a Ni(II)-cleavable C-terminal hexahistidine affinity tag. Protein Expr Purif 2019; 159:53-59. [PMID: 30905870 DOI: 10.1016/j.pep.2019.03.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Revised: 03/16/2019] [Accepted: 03/18/2019] [Indexed: 11/26/2022]
Abstract
The role of the termini of protein sequences is often perturbed by remnant amino acids after the specific protease cleavage of the affinity tags and/or by the amino acids encoded by the plasmid at/around the restriction enzyme sites used to insert the genes. Here we describe a method for affinity purification of a metallonuclease with its precisely determined native termini. First, the gene encoding the target protein is inserted into a newly designed cloning site, which contains two self-eliminating BsmBI restriction enzyme sites. As a consequence, the engineered DNA code of Ni(II)-sensitive Ser-X-His-X motif is fused to the 3'-end of the inserted gene followed by the gene of an affinity tag for protein purification purpose. The C-terminal segment starting from Ser mentioned above is cleaved off from purified protein by a Ni(II)-induced protease-like action. The success of the purification and cleavage was confirmed by gel electrophoresis and mass spectrometry, while structural integrity of the purified protein was checked by circular dichroism spectroscopy. Our new protein expression DNA construct is an advantageous tool for protein purification, when the complete removal of affinity or other tags, without any remaining amino acid residue is essential. The described procedure can easily be generalized and combined with various affinity tags at the C-terminus for chromatographic applications.
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Affiliation(s)
- Heba A H Abd Elhameed
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720, Szeged, Hungary
| | - Bálint Hajdu
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720, Szeged, Hungary
| | - Ria K Balogh
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720, Szeged, Hungary
| | - Enikő Hermann
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720, Szeged, Hungary
| | - Éva Hunyadi-Gulyás
- Laboratory of Proteomics Research, Institute of Biochemistry, Biological Research Centre of the Hungarian Academy of Sciences, Temesvári krt. 62, H-6726, Szeged, Hungary
| | - Béla Gyurcsik
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720, Szeged, Hungary.
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6
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Belczyk-Ciesielska A, Csipak B, Hajdu B, Sparavier A, Asaka MN, Nagata K, Gyurcsik B, Bal W. Nickel(ii)-promoted specific hydrolysis of zinc finger proteins. Metallomics 2018; 10:1089-1098. [DOI: 10.1039/c8mt00098k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The (S/T)XH sequence in Cys2His2zinc fingers can be hydrolytically cleaved by Ni(ii) ions. This reaction can be applied for purification, inhibition or activation of designed zinc finger fusion proteins.
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Affiliation(s)
| | - Brigitta Csipak
- Department of Inorganic and Analytical Chemistry
- University of Szeged
- Szeged H-6720
- Hungary
| | - Bálint Hajdu
- Department of Inorganic and Analytical Chemistry
- University of Szeged
- Szeged H-6720
- Hungary
| | | | - Masamitsu N. Asaka
- Nagata Special Laboratory
- Faculty of Medicine
- University of Tsukuba
- Tsukuba 305-8575
- Japan
| | - Kyosuke Nagata
- Nagata Special Laboratory
- Faculty of Medicine
- University of Tsukuba
- Tsukuba 305-8575
- Japan
| | - Béla Gyurcsik
- Department of Inorganic and Analytical Chemistry
- University of Szeged
- Szeged H-6720
- Hungary
| | - Wojciech Bal
- Institute of Biochemistry and Biophysics
- Polish Academy of Sciences
- Warsaw
- Poland
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7
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Metal assisted peptide bond hydrolysis: Chemistry, biotechnology and toxicological implications. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.02.009] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Wezynfeld NE, Bossak K, Goch W, Bonna A, Bal W, Frączyk T. Human annexins A1, A2, and A8 as potential molecular targets for Ni(II) ions. Chem Res Toxicol 2014; 27:1996-2009. [PMID: 25330107 DOI: 10.1021/tx500337w] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Nickel is harmful for humans, but molecular mechanisms of its toxicity are far from being fully elucidated. One of such mechanisms may be associated with the Ni(II)-dependent peptide bond hydrolysis, which occurs before Ser/Thr in Ser/Thr-Xaa-His sequences. Human annexins A1, A2, and A8, proteins modulating the immune system, contain several such sequences. To test if these proteins are potential molecular targets for nickel toxicity we characterized the binding of Ni(II) ions and hydrolysis of peptides Ac-KALTGHLEE-am (A1-1), Ac-TKYSKHDMN-am (A1-2), and Ac-GVGTRHKAL-am (A1-3), from annexin A1, Ac-KMSTVHEIL-am (A2-1) and Ac-SALSGHLET-am (A2-2), from annexin A2, and Ac-VKSSSHFNP-am (A8-1), from annexin A8, using UV-vis and circular dichroism (CD) spectroscopies, potentiometry, isothermal titration calorimetry, high-performance liquid chromatography (HPLC), and electrospray ionization mass spectrometry (ESI-MS). We found that at physiological conditions (pH 7.4 and 37 °C) peptides A1-2, A1-3, A8-1, and to some extent A2-2 bind Ni(II) ions sufficiently strongly in 4N complexes and are hydrolyzed at sufficiently high rates to justify the notion that these annexins can undergo nickel hydrolysis in vivo. These results are discussed in the context of specific biochemical interactions of respective proteins. Our results also expand the knowledge about Ni(II) binding to histidine peptides by determination of thermodynamic parameters of this process and spectroscopic characterization of 3N complexes. Altogether, our results indicate that human annexins A1, A2, and A8 are potential molecular targets for nickel toxicity and help design appropriate cellular studies.
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Affiliation(s)
- Nina E Wezynfeld
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences , Pawińskiego 5a, 02-106 Warsaw, Poland
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9
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Stanyon HF, Cong X, Chen Y, Shahidullah N, Rossetti G, Dreyer J, Papamokos G, Carloni P, Viles JH. Developing predictive rules for coordination geometry from visible circular dichroism of copper(II) and nickel(II) ions in histidine and amide main-chain complexes. FEBS J 2014; 281:3945-54. [DOI: 10.1111/febs.12934] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 07/03/2014] [Accepted: 07/14/2014] [Indexed: 01/08/2023]
Affiliation(s)
- Helen F. Stanyon
- School of Biological and Chemical Sciences; Queen Mary; University of London; UK
| | - Xiaojing Cong
- Computational Biophysics; German Research School for Simulation Sciences (Joint venture of RWTH Aachen University and Forschungszentrum Jülich); Germany
- Institute for Advanced Simulations IAS-5; Computational Biomedicine; Forschungszentrum Jülich Germany
| | - Yan Chen
- School of Biological and Chemical Sciences; Queen Mary; University of London; UK
| | - Nabeela Shahidullah
- School of Biological and Chemical Sciences; Queen Mary; University of London; UK
| | - Giulia Rossetti
- Computational Biophysics; German Research School for Simulation Sciences (Joint venture of RWTH Aachen University and Forschungszentrum Jülich); Germany
- Institute for Advanced Simulations IAS-5; Computational Biomedicine; Forschungszentrum Jülich Germany
- Jülich Supercomputing Center; Forschungszentrum Jülich Germany
- Computational Biomedicine Section INM-9; Institute for Neuroscience and Medicine; Jülich Germany
| | - Jens Dreyer
- Computational Biophysics; German Research School for Simulation Sciences (Joint venture of RWTH Aachen University and Forschungszentrum Jülich); Germany
- Institute for Advanced Simulations IAS-5; Computational Biomedicine; Forschungszentrum Jülich Germany
| | - George Papamokos
- Computational Biophysics; German Research School for Simulation Sciences (Joint venture of RWTH Aachen University and Forschungszentrum Jülich); Germany
- Institute for Advanced Simulations IAS-5; Computational Biomedicine; Forschungszentrum Jülich Germany
- Scuola Internazionale Superiore di Studi Avanzati; Trieste Italy
| | - Paolo Carloni
- Computational Biophysics; German Research School for Simulation Sciences (Joint venture of RWTH Aachen University and Forschungszentrum Jülich); Germany
- Institute for Advanced Simulations IAS-5; Computational Biomedicine; Forschungszentrum Jülich Germany
- Computational Biomedicine Section INM-9; Institute for Neuroscience and Medicine; Jülich Germany
| | - John H. Viles
- School of Biological and Chemical Sciences; Queen Mary; University of London; UK
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10
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Podobas EI, Bonna A, Polkowska-Nowakowska A, Bal W. Dual catalytic role of the metal ion in nickel-assisted peptide bond hydrolysis. J Inorg Biochem 2014; 136:107-14. [DOI: 10.1016/j.jinorgbio.2014.03.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Revised: 03/08/2014] [Accepted: 03/10/2014] [Indexed: 10/25/2022]
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11
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Belczyk-Ciesielska A, Zawisza IA, Mital M, Bonna A, Bal W. Sequence-specific Cu(II)-dependent peptide bond hydrolysis: similarities and differences with the Ni(II)-dependent reaction. Inorg Chem 2014; 53:4639-46. [PMID: 24735221 DOI: 10.1021/ic5003176] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Potentiometry and UV-vis and circular dichroism spectroscopies were applied to characterize Cu(II) coordination to the Ac-GASRHWKFL-NH2 peptide. Using HPLC and ESI-MS, we demonstrated that Cu(II) ions cause selective hydrolysis of the Ala-Ser peptide bond in this peptide and characterized the pH and temperature dependence of the reaction. We found that Cu(II)-dependent hydrolysis occurs solely in 4N complexes, in which the equatorial coordination positions of the Cu(II) ion are saturated by peptide donor atoms, namely, the pyridine-like nitrogen of the His imidazole ring and three preceding peptide bond nitrogens. Analysis of the reaction products led to the conclusion that Cu(II)-dependent hydrolysis proceeds according to the mechanism demonstrated previously for Ni(II) ions (Kopera, E.; Krężel, A.; Protas, A. M.; Belczyk, A.; Bonna, A.; Wysłouch-Cieszyńska, A.; Poznański, J.; Bal, W. Inorg. Chem. 2010, 49, 6636-6645). However, the pseudo-first-order reaction rate found for Cu(II) is, on average, 100 times lower than that for Ni(II) ions. The greater ability of Cu(II) ions to form 4N complexes at lower pH partially compensates for this difference in rates, resulting in similar hydrolytic activities for the two ions around pH 7.
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12
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Malandrinos G, Hadjiliadis N. Cu(II)–histones interaction related to toxicity-carcinogenesis. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2013.12.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Medici S, Peana M, Nurchi VM, Zoroddu MA. The involvement of amino acid side chains in shielding the nickel coordination site: an NMR study. Molecules 2013; 18:12396-414. [PMID: 24108401 PMCID: PMC6269899 DOI: 10.3390/molecules181012396] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Revised: 09/26/2013] [Accepted: 09/29/2013] [Indexed: 11/16/2022] Open
Abstract
Coordination of proteins and peptides to metal ions is known to affect their properties, often by a change in their structural organization. Side chains of the residues directly involved in metal binding or very close to the coordination centre may arrange themselves around it, in such a way that they can, for instance, disrupt the protein functions or stabilize a metal complex by shielding it from the attack of water or other small molecules. The conformation of these side chains may be crucial to different biological or toxic processes. In our research we have encountered such behaviour in several cases, leading to interesting results for our purposes. Here we give an overview on the structural changes involving peptide side chains induced by Ni(II) coordination. In this paper we deal with a number of peptides, deriving from proteins containing one or more metal coordinating sites, which have been studied through a series of NMR experiments in their structural changes caused by Ni(II) complexation. Several peptides have been included in the study: short sequences from serum albumin (HSA), Des-Angiotensinogen, the 30-amino acid tail of histone H4, some fragments from histone H2A and H2B, the initial fragment of human protamine HP2 and selected fragments from prion and Cap43 proteins. NMR was the election technique for gathering structural information. Experiments performed for this purpose included 1D 1H and 13C, and 2D HSQC, COSY, TOCSY, NOESY and ROESY acquisitions, which allowed the calculation of the Ni(II) complexes structural models.
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Affiliation(s)
- Serenella Medici
- Department of Chemistry and Pharmacy, University of Sassari, Via Vienna 2, 07100, Sassari, Italy; E-Mails: (S.M.); (M.P.); (V.M.N.)
| | - Massimiliano Peana
- Department of Chemistry and Pharmacy, University of Sassari, Via Vienna 2, 07100, Sassari, Italy; E-Mails: (S.M.); (M.P.); (V.M.N.)
| | - Valeria Marina Nurchi
- Department of Chemical and Geological Sciences, University of Cagliari, Cittadella Universitaria, I-09042 Monserrato, Cagliari, Italy
| | - Maria Antonietta Zoroddu
- Department of Chemistry and Pharmacy, University of Sassari, Via Vienna 2, 07100, Sassari, Italy; E-Mails: (S.M.); (M.P.); (V.M.N.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +39-079-229529; Fax: +39-079-228720
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Protas AM, Ariani HHN, Bonna A, Polkowska-Nowakowska A, Poznański J, Bal W. Sequence-specific Ni(II)-dependent peptide bond hydrolysis for protein engineering: Active sequence optimization. J Inorg Biochem 2013; 127:99-106. [DOI: 10.1016/j.jinorgbio.2013.07.037] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2013] [Revised: 07/27/2013] [Accepted: 07/27/2013] [Indexed: 10/26/2022]
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15
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Peana M, Medici S, Nurchi VM, Crisponi G, Zoroddu MA. Nickel binding sites in histone proteins: Spectroscopic and structural characterization. Coord Chem Rev 2013. [DOI: 10.1016/j.ccr.2013.02.022] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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16
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Kopera E, Belczyk-Ciesielska A, Bal W. Application of Ni(II)-assisted peptide bond hydrolysis to non-enzymatic affinity tag removal. PLoS One 2012; 7:e36350. [PMID: 22574150 PMCID: PMC3344860 DOI: 10.1371/journal.pone.0036350] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Accepted: 04/02/2012] [Indexed: 11/18/2022] Open
Abstract
In this study, we demonstrate a non-enzymatic method for hydrolytic peptide bond cleavage, applied to the removal of an affinity tag from a recombinant fusion protein, SPI2-SRHWAP-His(6). This method is based on a highly specific Ni(II) reaction with (S/T)XHZ peptide sequences. It can be applied for the protein attached to an affinity column or to the unbound protein in solution. We studied the effect of pH, temperature and Ni(II) concentration on the efficacy of cleavage and developed an analytical protocol, which provides active protein with a 90% yield and ∼100% purity. The method works well in the presence of non-ionic detergents, DTT and GuHCl, therefore providing a viable alternative for currently used techniques.
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Affiliation(s)
- Edyta Kopera
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | | | - Wojciech Bal
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
- * E-mail:
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17
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Protas AM, Bonna A, Kopera E, Bal W. Selective peptide bond hydrolysis of cysteine peptides in the presence of Ni(II) ions. J Inorg Biochem 2010; 105:10-6. [PMID: 21134597 DOI: 10.1016/j.jinorgbio.2010.09.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2010] [Revised: 09/16/2010] [Accepted: 09/20/2010] [Indexed: 11/16/2022]
Abstract
Recently, we described a sequence-specific R1-(Ser/Thr) peptide bond hydrolysis reaction in peptides of a general sequence R1-(Ser/Thr)-Xaa-His-Zaa-R, which occurs in the presence of Ni(II) ions [A. Krężel, E. Kopera, A. M. Protas, A. Wysłouch-Cieszyńska, J. Poznański, W. Bal, J. Am. Chem. Soc. 132 (2010) 3355-3366]. In this study we explored the possibility of substituting the Ser/Thr and the His residues, necessary for the reaction to occur according to the Ni(II)-assisted acyl shift reaction mechanism, with Cys residues. We tested this concept by synthesizing three homologous peptides: R1-Ser-Arg-Cys-Trp-R2, R1-Cys-Arg-His-Trp-R2, and R1-Cys-Arg-Cys-Trp-R2, and the R1-Ser-Arg-His-Trp-R2 peptide as comparator (R1 and R2 were CH3CO-Gly-Ala and Lys-Phe-Leu-NH2, respectively). We studied their hydrolysis in the presence of Ni(II) ions, under anaerobic conditions and in the presence of TCEP as a thiol group antioxidant. We measured hydrolysis rates using HPLC and identified products of reaction using electrospray mass spectrometry. Potentiometry and UV-vis spectroscopy were used to assess Ni(II) complexation. We demonstrated that Ni(II) is not compatible with the Cys substitution of the Ser/Thr acyl acceptor residue, but the substitution of the Ni(II) binding His residue with a Cys yields a peptide susceptible to Ni(II)-related hydrolysis. The relatively high activity of the R1-Ser-Arg-Cys-Trp-R2 peptide at pH 7.0 suggests that this peptide and its Cys-containing analogs might be useful in practical applications of Ni(II)-dependent peptide bond hydrolysis.
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Affiliation(s)
- Anna Maria Protas
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
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18
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Interactions of Trivalent Lanthanide Cations with a New Hexadentate Di-Schiff Base: New Lanthanide(III) Complexes from (NE,N'E)-2,2'-(ethane-1,2-diylbis(oxy))bis(N-(pyridin-2-ylmethylene)ethanamine). Bioinorg Chem Appl 2010. [PMID: 20689704 PMCID: PMC2905721 DOI: 10.1155/2010/613140] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2010] [Accepted: 05/02/2010] [Indexed: 11/18/2022] Open
Abstract
The novel lanthanide(III) complexes [Ln(NO(3))(2)L](NO(3)).3MeOH (Ln = La 1, Pr 2) and [Ln(NO(3))(3)L](NO(3)).2MeOH (Ln = Gd 3, Yb 4), where L = (NE,N'E)-2,2'-(ethane-1,2-diylbis(oxy))bis(N-(pyridin-2-ylmethylene)ethanamine), have been obtained by direct reaction of the Schiff base ligand and the corresponding hydrated lanthanide(III) nitrates in methanol. All complexes were characterized spectroscopically and thermogravimetrically. Complex 4 was also characterized with crystallographic studies: orthorhombic P2(1)2(1)2(1), a = 10.6683(14), b = 13.4752(15), c = 19.3320(26) A. In the molecular structure of 4, Yb(III) is surrounded by all donor atoms of the Schiff base (four nitrogen and two oxygen atoms) and four oxygen atoms belonging to two bidentate chelating nitrato ligands.
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Cu(II) and Ni(II) interactions with the terminally blocked hexapeptide Ac-Leu-Ala-His-Tyr-Asn-Lys-amide model of histone H2B (80-85). Bioinorg Chem Appl 2010:257038. [PMID: 18431450 PMCID: PMC2292837 DOI: 10.1155/2008/257038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2007] [Accepted: 02/04/2008] [Indexed: 01/12/2023] Open
Abstract
The N- and C-terminal blocked hexapeptide Ac-Leu-Ala-His-Tyr-Asn-Lys-amide (LAHYNK) representing the 80–85 fragment of histone H2B was synthesized and its interactions with Cu(II) and Ni(II) ions were studied by potentiometric, UV-Vis, CD, EPR, and NMR spectroscopic techniques in solution. Our data reveal that the imidazole N(3) nitrogen atom is the primary ligating group for both metal ions. Sequential amide groups deprotonation and subsequent coordination to metal ions indicated an {Nimidazole, 3Namide} coordination mode above pH∼9, in all cases. In the case of Cu(II)-peptide system, the almost exclusive formation of the predominant species CuL in neutral media accounting for almost 98% of the total metal ion concentration at pH 7.3 strongly indicates that at physiological pH values the sequence -LAHYNK- of histone H2B provides very efficient binding sites for metal ions. The imidazole pyrrole N(1) ionization (but not coordination) was also detected in species
CuH−4L present in solution above pH ∼ 11.
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Kopera E, Krȩżel A, Protas AM, Belczyk A, Bonna A, Wysłouch-Cieszyńska A, Poznański J, Bal W. Sequence-Specific Ni(II)-Dependent Peptide Bond Hydrolysis for Protein Engineering: Reaction Conditions and Molecular Mechanism. Inorg Chem 2010; 49:6636-45. [DOI: 10.1021/ic1005709] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Edyta Kopera
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
| | - Artur Krȩżel
- Laboratory of Protein Engineering, Faculty of Biotechnology, University of Wrocław, Tamka 2, 50-137 Wrocław, Poland
| | - Anna Maria Protas
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
| | - Agnieszka Belczyk
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
| | - Arkadiusz Bonna
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
| | | | - Jarosław Poznański
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
| | - Wojciech Bal
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
- Central Institute for Labour Protection—National Research Institute, Czerniakowska 16, 00-701 Warsaw, Poland
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Nunes AM, Zavitsanos K, Del Conte R, Malandrinos G, Hadjiliadis N. The Possible Role of 94−125 Peptide Fragment of Histone H2B in Nickel-Induced Carcinogenesis. Inorg Chem 2010; 49:5658-68. [DOI: 10.1021/ic1005665] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ana Mónica Nunes
- Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
| | - Kimon Zavitsanos
- Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
| | - Rebecca Del Conte
- Magnetic Resonance Center, University of Florence, Via L. Sacconi 6, 0019, Sesto Fiorentino, Italy
| | | | - Nick Hadjiliadis
- Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
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Krȩżel A, Kopera E, Protas AM, Poznański J, Wysłouch-Cieszyńska A, Bal W. Sequence-Specific Ni(II)-Dependent Peptide Bond Hydrolysis for Protein Engineering. Combinatorial Library Determination of Optimal Sequences. J Am Chem Soc 2010; 132:3355-66. [DOI: 10.1021/ja907567r] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Artur Krȩżel
- Laboratory of Protein Engineering, Faculty of Biotechnology, University of Wrocław, Tamka 2, 50-137 Wrocław, Poland, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland, Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland, and Central Institute for Labour Protection—National Research Institute, Czerniakowska 16, 00-701 Warsaw, Poland
| | - Edyta Kopera
- Laboratory of Protein Engineering, Faculty of Biotechnology, University of Wrocław, Tamka 2, 50-137 Wrocław, Poland, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland, Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland, and Central Institute for Labour Protection—National Research Institute, Czerniakowska 16, 00-701 Warsaw, Poland
| | - Anna Maria Protas
- Laboratory of Protein Engineering, Faculty of Biotechnology, University of Wrocław, Tamka 2, 50-137 Wrocław, Poland, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland, Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland, and Central Institute for Labour Protection—National Research Institute, Czerniakowska 16, 00-701 Warsaw, Poland
| | - Jarosław Poznański
- Laboratory of Protein Engineering, Faculty of Biotechnology, University of Wrocław, Tamka 2, 50-137 Wrocław, Poland, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland, Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland, and Central Institute for Labour Protection—National Research Institute, Czerniakowska 16, 00-701 Warsaw, Poland
| | - Aleksandra Wysłouch-Cieszyńska
- Laboratory of Protein Engineering, Faculty of Biotechnology, University of Wrocław, Tamka 2, 50-137 Wrocław, Poland, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland, Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland, and Central Institute for Labour Protection—National Research Institute, Czerniakowska 16, 00-701 Warsaw, Poland
| | - Wojciech Bal
- Laboratory of Protein Engineering, Faculty of Biotechnology, University of Wrocław, Tamka 2, 50-137 Wrocław, Poland, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland, Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland, and Central Institute for Labour Protection—National Research Institute, Czerniakowska 16, 00-701 Warsaw, Poland
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Nunes AM, Zavitsanos K, Malandrinos G, Hadjiliadis N. Coordination of Cu2+and Ni2+ with the histone model peptide of H2B N-terminal tail (1-31 residues): A spectroscopic study. Dalton Trans 2010; 39:4369-81. [DOI: 10.1039/b927157k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Timári S, Kállay C, Osz K, Sóvágó I, Várnagy K. Transition metal complexes of short multihistidine peptides. Dalton Trans 2009:1962-71. [PMID: 19259566 DOI: 10.1039/b816498c] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nickel(ii), cobalt(ii) and cadmium(ii) complexes of terminally protected multihistidine peptides including Ac-HGH-OH, Ac-HGH-NHMe, Ac-HHGH-OH, Ac-HAHVH-NH(2), Ac-HVHGH-NH(2), Ac-HGHVH-NH(2) and Ac-(His-Sar)(n)-His-NH(2) (n = 1, 2 or 3) were studied by potentiometric, UV-Vis, CD and (1)H NMR spectroscopic techniques. It was found that the complexes in which the histidine imidazole nitrogens coordinate with ML stoichiometry are the main species in the physiological pH-range in all cases. The stability of these complexes is determined by the number of bound imidazole rings, the presence of the carboxylate group and the quality of the metal ion centre. The larger the number of coordinated imidazole-N donor atoms, the higher the stability of the complex. The stability constants of the ML complexes follow the Ni(ii) > Co(ii) approximately Cd(ii) order. Cobalt(ii) and cadmium(ii) are not, but nickel(ii) is able to promote the deprotonation and the coordination of amide nitrogens and NiH(-2)L and NiH(-3)L (Ni(2)H(-4)L) species predominate in basic solutions. For the pentapeptides with the exception of the sarcosine containing ligand the presence of coordination isomers is supported by spectroscopic methods. These data reveal that the favoured isomers are coordinated on the C-termini, but the ratio of isomers depends on the sequence of peptides.
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Affiliation(s)
- Sarolta Timári
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4032, Debrecen, Hungary
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Nunes AMPC, Zavitsanos K, Del Conte R, Malandrinos G, Hadjiliadis N. Interaction of histone H2B (fragment 63–93) with Ni(ii). An NMR study. Dalton Trans 2009:1904-13. [DOI: 10.1039/b817411c] [Citation(s) in RCA: 11] [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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26
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Zavitsanos K, Nunes AMPC, Malandrinos G, Kállay C, Sóvágó I, Magafa V, Cordopatis P, Hadjiliadis N. Interaction of Cu(ii) and Ni(ii) with the 63–93 fragment of histone H2B. Dalton Trans 2008:6179-87. [DOI: 10.1039/b810354b] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Karavelas T, Malandrinos G, Hadjiliadis N, Mlynarz P, Kozlowski H, Barsan M, Barsam M, Butler I. Coordination properties of Cu(II) and Ni(II) ions towards the C-terminal peptide fragment -TYTEHA- of histone H4. Dalton Trans 2007:1215-23. [PMID: 18283382 DOI: 10.1039/b716863b] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In order to reveal more information about the toxicity caused by metals and furthermore their influence to the physiological metabolism of the cell, the hexapeptide model Ac-ThrTyrThrGluHisAla-am representing the C-terminal 71-76 fragment of histone H4 which lies into the nucleosome core, was synthesized. A combined pH-metric and spectroscopic UV-VIS, EPR, CD and NMR study of Ni(II) and Cu(II) binding to the blocked hexapeptide, revealed the formation of octahedral complexes involving imidazole nitrogen of histidine, at pH 5 and pH 7 for Cu(II) and Ni(II) ions respectively. In basic solutions a major square-planar 4 N Ni(II)-complex, adopting a {N(Im), 3N(-)} coordination mode, was formed. In the case of Cu(II) ions, a 3 N complex, involving the imidazole nitrogen of histidine and two deprotonated amide nitrogens of the backbone of the peptide, at pH 7 and a series of 4 N complexes starting at pH 6.5, were suggested. In addition Ni(II)-mediated hydrolysis of the peptide bond-Tyr-Thr was evident following our experimental data.
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Affiliation(s)
- T Karavelas
- University of Ioannina, Department of Chemistry, Ioannina, 45110, Greece
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Klewpatinond M, Viles JH. Empirical rules for rationalising visible circular dichroism of Cu2+and Ni2+histidine complexes: Applications to the prion protein. FEBS Lett 2007; 581:1430-4. [PMID: 17359979 DOI: 10.1016/j.febslet.2007.02.068] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2007] [Revised: 02/27/2007] [Accepted: 02/27/2007] [Indexed: 10/23/2022]
Abstract
A natively unfolded region of the prion protein, PrP(90-126) binds Cu(2+) ions and is vital for prion propagation. Pentapeptides, acyl-GGGTH(92-96) and acyl-TNMKH(107-111), represent the minimum motif for this Cu(2+) binding region. EPR and (1)H NMR suggests that the coordination geometry for the two binding sites is very similar. However, the visible CD spectra of the two sites are very different, producing almost mirror image spectra. We have used a series of analogues of the pentapeptides containing His(96) and His(111) to rationalise these differences in the visible CD spectra. Using simple histidine-containing tri-peptides we have formulated a set of empirical rules that can predict the appearance of Cu(2+) visible CD spectra involving histidine and amide main-chain coordination.
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Affiliation(s)
- Mark Klewpatinond
- School of Biological and Chemical Sciences, Queen Mary, University of London, Mile End Road, London E1 4NS, UK
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Jezowska-Bojczuk M, Kaczmarek P, Bal W, Kasprzak KS. Coordination mode and oxidation susceptibility of nickel(II) complexes with 2'-deoxyguanosine 5'-monophosphate and l-histidine. J Inorg Biochem 2005; 98:1770-7. [PMID: 15522404 DOI: 10.1016/j.jinorgbio.2004.08.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2004] [Revised: 07/16/2004] [Accepted: 08/04/2004] [Indexed: 10/26/2022]
Abstract
The formation of binary and ternary complexes of Ni(II) with two biologically relevant molecules, 2'-deoxyguanosine 5'-monophosphate (dGMP) and l-histidine (histidine or His) was characterized by potentiometry and UV-visible spectroscopy. For dGMP, the mononuclear complexes with stoichiometries NiH(2)L(+), NiHL and NiL(-) were found. In the mixed system the ternary complexes NiH(2)LA, NiHLA(-) and NiLA(2-) were detected. In binary systems, the Ni(II) ion coordinates to dGMP through the N-7 atom of its purine ring and indirectly through a water molecule bonded to the phosphate group, while in ternary complexes Ni(II) is bonded to all three histidine donors and directly to the phosphate group of dGMP. Both binary and ternary complexes are susceptible to oxidation by H(2)O(2), with the increased formation of 8-oxo-dGMP in the ternary system. The toxicological relevance of these findings stems from possible disturbance by the major biological Ni(II)-His complex of the nucleotide pools homeostasis through the formation of ternary species and oxidation promotion, as well as from 8-oxo-dGMP capacity to inhibit enzymatic elimination of promutagenic oxidized nucleotides from such pools.
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Mylonas M, Krężel A, Plakatouras JC, Hadjiliadis N, Bal W. Interactions of transition metal ions with His-containing peptide models of histone H2A. J Mol Liq 2005. [DOI: 10.1016/j.molliq.2004.07.025] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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31
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Karavelas T, Mylonas M, Malandrinos G, Plakatouras JC, Hadjiliadis N, Mlynarz P, Kozlowski H. Coordination properties of Cu(II) and Ni(II) ions towards the C-terminal peptide fragment –ELAKHA– of histone H2B. J Inorg Biochem 2005; 99:606-15. [PMID: 15621295 DOI: 10.1016/j.jinorgbio.2004.11.012] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2004] [Revised: 11/10/2004] [Accepted: 11/12/2004] [Indexed: 11/29/2022]
Abstract
The coordination properties of the peptide Ac-GluLeuAlaLysHisAla-amide, the C-terminal 102-107 fragment of histone H2B towards Cu(II) and Ni(II) ions were studied by means of potentiometry and spectroscopic techniques (UV/Vis, CD, EPR and NMR). It was found that the peptide has a unique ability to bind Cu(II) ions at physiological pH values at a Cu(II): peptide molar ratio 1:2, which is really surprising for blocked hexapeptides containing one His residue above position 3. At physiological pH values the studied hexapeptide forms a CuL(2) complex {N(Im),2N(-)}, while in acidic and basic pH values the equimolar mode is preferred. In basic solutions Ac-GluLeuAlaLysHisAla-amide may bound through a {4N(-)} mode forming a square-planar complex, in which the imidazole ring is not any more coordinated or it has been removed in an axial position. On the contrary, Ni(II) ions form only equimolar complexes, starting from a distorted octahedral complex at about neutral pH values to a planar complex, where hexapeptide is bound through a {N(Im),3N(-)} mode in equatorial plane. The results may be of importance in order to reveal more information about the toxicity caused by metals and furthermore their influence to the physiologic metabolism of the cell.
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Affiliation(s)
- T Karavelas
- Department of Chemistry, University of Ioannina, Ioannina 45110, Greece
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Mylonas M, Plakatouras JC, Hadjiliadis N, Papavasileiou KD, Melissas VS. An extremely stable Ni(II) complex derived from the hydrolytic cleavage of the C-terminal tail of histone H2A. J Inorg Biochem 2005; 99:637-43. [PMID: 15621298 DOI: 10.1016/j.jinorgbio.2004.11.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2004] [Revised: 11/09/2004] [Accepted: 11/18/2004] [Indexed: 10/26/2022]
Abstract
The C-terminal blocked tetrapeptides SHHK- and SAHK-, which represent the fragments produced from the hydrolysis of the hexapeptides' -TASHHK-, -TESHHK-, and -TESAHK- complexes with Ni(II), were synthesized and their interactions with Ni(II) ions were studied potentiometrically and spectroscopically. Both tetrapeptides interact strongly with Ni(II) ions leading to square-planar complexes with 4N {NH(2),2N(-),N(im)} coordination. The stability of the Ni-SHHK- complex is about 2 orders of magnitude higher than the Ni-SAHK- complex. Spectroscopic evidence and theoretical predictions suggest the positioning of the free imidazole ring, in the Ni-SHHK- complex, above the coordination plane, explaining the extra stability of the complex.
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Affiliation(s)
- Marios Mylonas
- Department of Chemistry, University of Ioannina, GR 451 10 Ioannina, Greece
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Kaczmarek P, Jezowska-Bojczuk M, Gatner K, Bal W. Oxidative reactivity of Cu–TESHHK– and its alanine analogues. Dalton Trans 2005:1985-8. [PMID: 15909047 DOI: 10.1039/b502920a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Redox properties of Cu(II) complexes of the terminally blocked hexapeptide -TESHHK- and a series of its alanine substituted analogs: -TASHHK-, -TEAHHK-, -TESAHK-, -TESHAK-, were investigated in their reactions with hydrogen peroxide in solution and by cyclic voltammetry in a broad range of pH. The formation of reactive oxygen species was followed with the use of spectrophotometric indicators, NDMA and NBT. The results indicate that the ability of these complexes to generate hydroxyl-like radicals correlates with the formation of active Cu(III) complexes resulting from the oxidation of Cu(II) by H2O2, which interact with further H2O2 molecules specifically.
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Affiliation(s)
- Piotr Kaczmarek
- Faculty of Chemistry, University of Wrocław, 50-383 Wrocław, Poland
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Mylonas M, Plakatouras JC, Hadjiliadis N. Interactions of Ni(II) and Cu(II) ions with the hydrolysis products of the C-terminal -ESHH- motif of histone H2A model peptides. Association of the stability of the complexes formed with the cleavage of the -E-S- bond. Dalton Trans 2004:4152-60. [PMID: 15573167 DOI: 10.1039/b414679d] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We studied the interactions of Ni(II) and Cu(II) ions with the synthetic tetrapeptides SHHK- and SAHK-, which were blocked by amidation making them more realistic models of the hydrolysis peptidic products of the hexapeptides models of H2A histone. A combination of potentiometric and spectroscopic techniques (UV/Vis, CD, NMR and EPR) suggested that at pH > 7 both tetrapeptides coordinated equatorially through the imidazole ring of His in position 3, the N-terminal amino group and the two amide nitrogens existing between these groups {NH2, 2N-, NIm} forming 4N square-planar complexes. While in the case of the CuH(-1)L complex with SHHK- a possible axial coordination of the imidazole ring of His in position 2 was suggested, in the case of the analogous NiH(-1)L complex a completely different interaction of the same ring with metal ions was observed. As expected these complexes have the same structures with the hydrolysis products produced from the Ni(II)- or Cu(II)-assisted hydrolysis of previously studied hexapeptide models of the C-terminal of histone H2A, due to their predominance at pH > 7.4. In addition, the competition plots presented herein showed that the synthetic tetrapeptides SHHK- and SAHK- have higher affinity towards Ni(II) and Cu(II) ions than the previously studied hexapeptides, suggesting that metal ions remain bound to the peptidic products during the hydrolysis cleavage. Thus, it can be concluded that the stability of Ni(II) or Cu(II) complexes with the synthetic tetrapeptides and consequently with the real hydrolysis peptidic products is the driving force of the hydrolysis reaction of H2A histone blocked hexapeptide models, presented in previous studies.
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Affiliation(s)
- Marios Mylonas
- University of Ioannina, Department of Chemistry, Ioannina, 45110, Greece
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