1
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Szarszoń K, Andrä S, Janek T, Wątły J. Insights into the Chemistry, Structure, and Biological Activity of Human Salivary MUC7 Fragments and Their Cu(II) and Zn(II) Complexes. Inorg Chem 2024; 63:11616-11627. [PMID: 38856909 PMCID: PMC11200262 DOI: 10.1021/acs.inorgchem.4c00868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 05/30/2024] [Accepted: 05/31/2024] [Indexed: 06/11/2024]
Abstract
Mucin 7 (MUC7) is one of the salivary proteins whose role in the innate immune system is widely known, but still, neither its mechanism of action nor the impact of its metal coordination is fully understood. MUC7 and its fragments demonstrate potent antimicrobial activity, serving as a natural defense mechanism for organisms against pathogens. This study delves into the bioinorganic chemistry of MUC7 fragments (L1─EGRERDHELRHRRHHHQSPK; L2─EGRERDHELRHRR; L3─HHHQSPK) and their complexes with Cu(II) and Zn(II) ions. The antimicrobial characteristics of the investigated peptides and their complexes were systematically assessed against bacterial and fungal strains at pH 5.40 and pH 7.40. Our findings highlight the efficacy of these systems against Streptococcus sanguinis, a common oral cavity pathogen. Most interestingly, Zn(II) coordination increased (or triggered) the MUC7 antimicrobial activity, which underscores the pivotal role of metal ion coordination in governing the antimicrobial activity of human salivary MUC7 fragments against S. sanguinis.
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Affiliation(s)
- Klaudia Szarszoń
- Faculty
of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Silke Andrä
- Faculty
of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Tomasz Janek
- Department
of Biotechnology and Food Microbiology, Wrocław University of Environmental and Life Sciences, Chełmońskiego 37, 51-630 Wrocław, Poland
| | - Joanna Wątły
- Faculty
of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland
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2
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Szarszoń K, Mikołajczyk A, Grelich-Mucha M, Wieczorek R, Matera-Witkiewicz A, Olesiak-Bańska J, Rowińska-Żyrek M, Wątły J. Bioinorganic chemistry of shepherin II complexes helps to fight Candida albicans? J Inorg Biochem 2024; 253:112476. [PMID: 38171045 DOI: 10.1016/j.jinorgbio.2023.112476] [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: 10/30/2023] [Revised: 12/04/2023] [Accepted: 12/22/2023] [Indexed: 01/05/2024]
Abstract
The fungal cell wall and cell membrane are an important target for antifungal therapies, and a needle-like cell wall or membrane disruption may be an entirely novel antifungal mode of action. In this work, we show how the coordination of Zn(II) triggers the antifungal properties of shepherin II, a glycine- and histidine-rich antimicrobial peptide from the root of Capsella bursa-pastoris. We analyze Cu(II) and Zn(II) complexes of this peptide using experimental and theoretical methods, such as: mass spectrometry, potentiometry, UV-Vis and CD spectroscopies, AFM imaging, biological activity tests and DFT calculations in order to understand the correlation between their metal binding mode, structure, morphology and biological activity. We observe that Zn(II) coordinates to Shep II and causes a structural change, resulting in fibril formation, what has a pronounced biological consequence - a strong anticandidal activity. This phenomenon was observed neither for the peptide itself, nor for its copper(II) complex. The Zn(II) - shepherin II complex can be considered as a starting point for further anticandidal drug discovery, which is extremely important in the era of increasing antifungal drug resistance.
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Affiliation(s)
- Klaudia Szarszoń
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Aleksandra Mikołajczyk
- Screening of Biological Activity Assays and Collection of Biological Material Laboratory, Wrocław Medical University Biobank, Faculty of Pharmacy, Wrocław Medical University, 50-556 Wrocław, Poland
| | - Manuela Grelich-Mucha
- Faculty of Chemistry, Wrocław University of Science and Technology, Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland
| | - Robert Wieczorek
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Agnieszka Matera-Witkiewicz
- Screening of Biological Activity Assays and Collection of Biological Material Laboratory, Wrocław Medical University Biobank, Faculty of Pharmacy, Wrocław Medical University, 50-556 Wrocław, Poland
| | - Joanna Olesiak-Bańska
- Faculty of Chemistry, Wrocław University of Science and Technology, Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland
| | | | - Joanna Wątły
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland.
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3
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Noormägi A, Golubeva T, Berntsson E, Wärmländer SK, Tõugu V, Palumaa P. Direct Competition of ATCUN Peptides with Human Serum Albumin for Copper(II) Ions Determined by LC-ICP MS. ACS OMEGA 2023; 8:33912-33919. [PMID: 37744839 PMCID: PMC10515390 DOI: 10.1021/acsomega.3c04649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 08/29/2023] [Indexed: 09/26/2023]
Abstract
Copper is an indispensable biometal, primarily serving as a redox-competent cofactor in numerous proteins. Apart from preformed copper-binding sites within the protein structures, small peptide motifs exist called ATCUN, which are composed of an N-terminal tripeptide XZH, able to bind Cu(II) ions in exchangeable form. These motifs are common for serum albumin, but they are also present in a wide range of proteins and peptides. These proteins and peptides can be involved in copper metabolism, and copper ions can affect their biological role. The distribution of copper between the ATCUN peptides, including truncated amyloid-β (Aβ) peptides Aβ4-42 and Aβ11-42, which may be involved in Alzheimer's disease pathogenesis, is mainly determined by their concentrations and relative Cu(II)-binding affinities. The Cu(II)-binding affinity (log Kd) of several ATCUN peptides, determined by different methods and authors, varies by more than three orders of magnitude. This variation may be attributed to the chemical properties of peptides but can also be influenced by the differences in methods and experimental conditions used for the determination of Kd. In the current study, we performed direct competition experiments between selected ATCUN peptides and HSA by using an LC-ICP MS-based approach. We demonstrated that ATCUN and truncated Aβ peptides Aβ4-16 and Aβ11-15 bind Cu(II) ions with an affinity similar to that for HSA. Our results demonstrate that ATCUN motifs cannot compete with excess HSA for the binding of Cu(II) ions in the blood and cerebrospinal fluid.
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Affiliation(s)
- Andra Noormägi
- Department
of Chemistry and Biotechnology, Tallinn
University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia
| | - Tatjana Golubeva
- Department
of Chemistry and Biotechnology, Tallinn
University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia
| | - Elina Berntsson
- Department
of Chemistry and Biotechnology, Tallinn
University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia
- Chemistry
Section, Stockholm University, 10691 Stockholm, Sweden
| | | | - Vello Tõugu
- Department
of Chemistry and Biotechnology, Tallinn
University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia
| | - Peep Palumaa
- Department
of Chemistry and Biotechnology, Tallinn
University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia
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4
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Sequence-Activity Relationship of ATCUN Peptides in the Context of Alzheimer's Disease. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27227903. [PMID: 36432004 PMCID: PMC9698028 DOI: 10.3390/molecules27227903] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/04/2022] [Accepted: 11/07/2022] [Indexed: 11/17/2022]
Abstract
Amino-terminal CuII and NiII (ATCUN) binding sequences are widespread in the biological world. Here, we report on the study of eight ATCUN peptides aimed at targeting copper ions and stopping the associated formation of reactive oxygen species (ROS). This study was actually more focused on Cu(Aβ)-induced ROS production in which the Aβ peptide is the "villain" linked to Alzheimer's disease. The full characterization of CuII binding to the ATCUN peptides, the CuII extraction from CuII(Aβ), and the ability of the peptides to prevent and/or stop ROS formation are described in the relevant biological conditions. We highlighted in this research that all the ATCUN motifs studied formed the same thermodynamic complex but that the addition of a second histidine in position 1 or 2 allowed for an improvement in the CuII uptake kinetics. This kinetic rate was directly related to the ability of the peptide to stop the CuII(Aβ)-induced production of ROS, with the most efficient motifs being HWHG and HGHW.
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5
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Tobolska A, Wezynfeld NE, Wawrzyniak UE, Bal W, Wróblewski W. Tuning Receptor Properties of Metal-Amyloid Beta Complexes. Studies on the Interaction between Ni(II)-Aβ 5-9 and Phosphates/Nucleotides. Inorg Chem 2021; 60:19448-19456. [PMID: 34878265 PMCID: PMC8693174 DOI: 10.1021/acs.inorgchem.1c03285] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Amyloid-beta (Aβ) peptides, potentially relevant in the pathology of Alzheimer's disease, possess distinctive coordination properties, enabling an effective binding of transition-metal ions, with a preference for Cu(II). In this work, we found that a N-truncated Aβ analogue bearing a His-2 motif, Aβ5-9, forms a stable Ni(II) high-spin octahedral complex at a physiological pH of 7.4 with labile coordination sites and facilitates ternary interactions with phosphates and nucleotides. As the pH increased above 9, a spin transition from a high-spin to a low-spin square-planar Ni(II) complex was observed. Employing electrochemical techniques, we showed that interactions between the binary Ni(II)-Aβ5-9 complex and phosphate species result in significant changes in the Ni(II) oxidation signal. Thus, the Ni(II)-Aβ5-9 complex could potentially serve as a receptor in electrochemical biosensors for phosphate species. The obtained results could also be important for nickel toxicology.
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Affiliation(s)
- Aleksandra Tobolska
- Chair of Medical Biotechnology, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, Warsaw 00-664, Poland.,Faculty of Chemistry, University of Warsaw, Pasteura 1, Warsaw 02-093, Poland
| | - Nina E Wezynfeld
- Chair of Medical Biotechnology, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, Warsaw 00-664, Poland
| | - Urszula E Wawrzyniak
- Chair of Medical Biotechnology, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, Warsaw 00-664, Poland
| | - Wojciech Bal
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, Warsaw 02-106, Poland
| | - Wojciech Wróblewski
- Chair of Medical Biotechnology, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, Warsaw 00-664, Poland
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6
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Heinrich J, Bossak-Ahmad K, Riisom M, Haeri HH, Steel TR, Hergl V, Langhans A, Schattschneider C, Barrera J, Jamieson SMF, Stein M, Hinderberger D, Hartinger CG, Bal W, Kulak N. Incorporation of β-Alanine in Cu(II) ATCUN Peptide Complexes Increases ROS Levels, DNA Cleavage and Antiproliferative Activity*. Chemistry 2021; 27:18093-18102. [PMID: 34658072 PMCID: PMC9299640 DOI: 10.1002/chem.202102601] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Indexed: 12/30/2022]
Abstract
Redox‐active Cu(II) complexes are able to form reactive oxygen species (ROS) in the presence of oxygen and reducing agents. Recently, Faller et al. reported that ROS generation by Cu(II) ATCUN complexes is not as high as assumed for decades. High complex stability results in silencing of the Cu(II)/Cu(I) redox cycle and therefore leads to low ROS generation. In this work, we demonstrate that an exchange of the α‐amino acid Gly with the β‐amino acid β‐Ala at position 2 (Gly2→β‐Ala2) of the ATCUN motif reinstates ROS production (•OH and H2O2). Potentiometry, cyclic voltammetry, EPR spectroscopy and DFT simulations were utilized to explain the increased ROS generation of these β‐Ala2‐containing ATCUN complexes. We also observed enhanced oxidative cleavage activity towards plasmid DNA for β‐Ala2 compared to the Gly2 complexes. Modifications with positively charged Lys residues increased the DNA affinity through electrostatic interactions as determined by UV/VIS, fluorescence, and CD spectroscopy, and consequently led to a further increase in nuclease activity. A similar trend was observed regarding the cytotoxic activity of the complexes against several human cancer cell lines where β‐Ala2 peptide complexes had lower IC50 values compared to Gly2. The higher cytotoxicity could be attributed to an increased cellular uptake as determined by ICP‐MS measurements.
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Affiliation(s)
- Julian Heinrich
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, 14195, Berlin, Germany.,Institute of Chemistry, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Karolina Bossak-Ahmad
- Institute of Biochemistry and Biophysics, Polish Academy of Science, Pawińskiego 5a, 02-106, Warsaw, Poland
| | - Mie Riisom
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Haleh H Haeri
- Institute of Chemistry, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120, Halle, Germany
| | - Tasha R Steel
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Vinja Hergl
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, 14195, Berlin, Germany
| | - Alexander Langhans
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, 14195, Berlin, Germany
| | - Corinna Schattschneider
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, 14195, Berlin, Germany
| | - Jannis Barrera
- Institute of Chemistry, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany.,Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489, Berlin, Germany
| | - Stephen M F Jamieson
- Auckland Cancer Society Research Centre, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Matthias Stein
- Max Planck Institute for Dynamics of Complex Technical Systems, Sandtorstrasse 1, 39106, Magdeburg, Germany
| | - Dariush Hinderberger
- Institute of Chemistry, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120, Halle, Germany
| | - Christian G Hartinger
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Wojciech Bal
- Institute of Biochemistry and Biophysics, Polish Academy of Science, Pawińskiego 5a, 02-106, Warsaw, Poland
| | - Nora Kulak
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, 14195, Berlin, Germany.,Institute of Chemistry, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany
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7
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Abstract
![]()
ATCUN (amino terminal
Cu(II) and Ni(II) binding) motifs chelate
Cu(II) ions strongly. However, the impact of the phosphorylation of
neighboring residues on such complexation has not been elucidated.
The copper(II) dissociation constants of original and phosphorylated
peptides from human histatin-1 and human serum albumin were compared
using spectroscopic methods. Phosphorylation markedly weakened Cu(II)
binding. Thus, these results indicate that phosphorylation may be
a vital mechanism governing metal ion binding. The phosphorylation of serine residues within or nearby
an ATCUN motif markedly weakens Cu(II) binding. It indicates that
phosphorylation may be a vital mechanism of metal ion binding regulation.
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Affiliation(s)
- Tomasz Frączyk
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
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8
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Copper-binding anticancer peptides from the piscidin family: an expanded mechanism that encompasses physical and chemical bilayer disruption. Sci Rep 2021; 11:12620. [PMID: 34135370 PMCID: PMC8208971 DOI: 10.1038/s41598-021-91670-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 05/21/2021] [Indexed: 12/11/2022] Open
Abstract
In the search for novel broad-spectrum therapeutics to fight chronic infections, inflammation, and cancer, host defense peptides (HDPs) have garnered increasing interest. Characterizing their biologically-active conformations and minimum motifs for function represents a requisite step to developing them into efficacious and safe therapeutics. Here, we demonstrate that metallating HDPs with Cu2+ is an effective chemical strategy to improve their cytotoxicity on cancer cells. Mechanistically, we find that prepared as Cu2+-complexes, the peptides not only physically but also chemically damage lipid membranes. Our testing ground features piscidins 1 and 3 (P1/3), two amphipathic, histidine-rich, membrane-interacting, and cell-penetrating HDPs that are α-helical bound to membranes. To investigate their membrane location, permeabilization effects, and lipid-oxidation capability, we employ neutron reflectometry, impedance spectroscopy, neutron diffraction, and UV spectroscopy. While P1-apo is more potent than P3-apo, metallation boosts their cytotoxicities by up to two- and seven-fold, respectively. Remarkably, P3-Cu2+ is particularly effective at inserting in bilayers, causing water crevices in the hydrocarbon region and placing Cu2+ near the double bonds of the acyl chains, as needed to oxidize them. This study points at a new paradigm where complexing HDPs with Cu2+ to expand their mechanistic reach could be explored to design more potent peptide-based anticancer therapeutics.
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9
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Fu R, Rooney MT, Zhang R, Cotten ML. Coordination of Redox Ions within a Membrane-Binding Peptide: A Tale of Aromatic Rings. J Phys Chem Lett 2021; 12:4392-4399. [PMID: 33939920 DOI: 10.1021/acs.jpclett.1c00636] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The amino-terminal-copper-and-nickel-binding (ATCUN) motif, a tripeptide sequence ending with a histidine, confers important functions to proteins and peptides. Few high-resolution studies have been performed on the ATCUN motifs of membrane-associated proteins and peptides, limiting our understanding of how they stabilize Cu2+/Ni2+ in membranes. Here, we leverage solid-state NMR to investigate metal-binding to piscidin-1 (P1), a host-defense peptide featuring F1F2H3 as its ATCUN motif. Bound to redox ions, P1 chemically and physically damages pathogenic cell membranes. We design 13C/15N correlation experiments to detect and assign the deprotonated nitrogens produced and/or shifted by Ni2+-binding. Occupying multiple chemical states in P1-apo, H3 and the neighboring H4 respond to metalation by populating only the τ-tautomer. H3, as a proximal histidine, directly coordinates the metal, compared to the distal H4. Density functional theory calculations reflect this noncanonical arrangement and point toward cation-π interactions between the F1/F2/H4 aromatic rings and metal. These structural findings, which are relevant to other ATCUN-containing membrane peptides, could help design new therapeutics and materials for use in the areas of drug-resistant bacteria, neurological disorders, and biomedical imaging.
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Affiliation(s)
- Riqiang Fu
- National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, United States
| | - Mary T Rooney
- Department of Applied Science, William & Mary, Williamsburg, Virginia 23185, United States
| | - Rongfu Zhang
- National High Magnetic Field Laboratory, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, United States
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Myriam L Cotten
- Department of Applied Science, William & Mary, Williamsburg, Virginia 23185, United States
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10
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Falcone E, Vileno B, Hoang M, Raibaut L, Faller P. A luminescent ATCUN peptide variant with enhanced properties for copper(II) sensing in biological media. J Inorg Biochem 2021; 221:111478. [PMID: 33975250 DOI: 10.1016/j.jinorgbio.2021.111478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 04/26/2021] [Accepted: 04/26/2021] [Indexed: 10/21/2022]
Abstract
The measurement of labile CuII in biological samples is fundamental for understanding Cu metabolism and has been emerging as a promising diagnostic marker for Cu-related pathologies such as Wilson's and Alzheimer's diseases. The use of fluorescent chelators may be useful to circumvent separation steps employed by current methods. For this purpose, we recently designed a selective and suited-affinity turn-off luminescent probe based on a peptide bearing the CuII-binding Xxx-Zzz-His (Amino-Terminal CuII- and NiII-binding, ATCUN) motif and a TbIII-DOTA (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid) complex. Here, we present an analogue probe bearing the ATCUN motif variant Xxx-His-His. This probe showed much faster response in biologically-relevant media and higher stability than the previous motif at low pH. These features could be beneficial to the measurement of dynamic CuII fluctuations and the application in slightly acidic media, such as urine.
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Affiliation(s)
- Enrico Falcone
- Institut de Chimie, UMR 7177, CNRS, Université de Strasbourg, 4 Rue Blaise Pascal, 67000 Strasbourg, France.
| | - Bertrand Vileno
- Institut de Chimie, UMR 7177, CNRS, Université de Strasbourg, 4 Rue Blaise Pascal, 67000 Strasbourg, France; French EPR Federation of Research, Fédération IR-RPE CNRS, 67081 Strasbourg, France.
| | - Mai Hoang
- Institut de Chimie, UMR 7177, CNRS, Université de Strasbourg, 4 Rue Blaise Pascal, 67000 Strasbourg, France; Department of Chemistry, Earlham College, 801 National Road West, Richmond, 47374, Indiana, USA.
| | - Laurent Raibaut
- Institut de Chimie, UMR 7177, CNRS, Université de Strasbourg, 4 Rue Blaise Pascal, 67000 Strasbourg, France.
| | - Peter Faller
- Institut de Chimie, UMR 7177, CNRS, Université de Strasbourg, 4 Rue Blaise Pascal, 67000 Strasbourg, France.
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11
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Portelinha J, Duay SS, Yu SI, Heilemann K, Libardo MDJ, Juliano SA, Klassen JL, Angeles-Boza AM. Antimicrobial Peptides and Copper(II) Ions: Novel Therapeutic Opportunities. Chem Rev 2021; 121:2648-2712. [PMID: 33524257 DOI: 10.1021/acs.chemrev.0c00921] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The emergence of new pathogens and multidrug resistant bacteria is an important public health issue that requires the development of novel classes of antibiotics. Antimicrobial peptides (AMPs) are a promising platform with great potential for the identification of new lead compounds that can combat the aforementioned pathogens due to their broad-spectrum antimicrobial activity and relatively low rate of resistance emergence. AMPs of multicellular organisms made their debut four decades ago thanks to ingenious researchers who asked simple questions about the resistance to bacterial infections of insects. Questions such as "Do fruit flies ever get sick?", combined with pioneering studies, have led to an understanding of AMPs as universal weapons of the immune system. This review focuses on a subclass of AMPs that feature a metal binding motif known as the amino terminal copper and nickel (ATCUN) motif. One of the metal-based strategies of hosts facing a pathogen, it includes wielding the inherent toxicity of copper and deliberately trafficking this metal ion into sites of infection. The sudden increase in the concentration of copper ions in the presence of ATCUN-containing AMPs (ATCUN-AMPs) likely results in a synergistic interaction. Herein, we examine common structural features in ATCUN-AMPs that exist across species, and we highlight unique features that deserve additional attention. We also present the current state of knowledge about the molecular mechanisms behind their antimicrobial activity and the methods available to study this promising class of AMPs.
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Affiliation(s)
- Jasmin Portelinha
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Searle S Duay
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States.,Chemistry Department, Adamson University, 900 San Marcelino Street, Ermita, Manila 1000, Philippines
| | - Seung I Yu
- Department of Molecular and Cell Biology, University of Connecticut, 91 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Kara Heilemann
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - M Daben J Libardo
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Samuel A Juliano
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Jonathan L Klassen
- Department of Molecular and Cell Biology, University of Connecticut, 91 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Alfredo M Angeles-Boza
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States.,Institute of Material Science, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
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12
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Maiti BK, Govil N, Kundu T, Moura JJG. Designed Metal-ATCUN Derivatives: Redox- and Non-redox-Based Applications Relevant for Chemistry, Biology, and Medicine. iScience 2020; 23:101792. [PMID: 33294799 PMCID: PMC7701195 DOI: 10.1016/j.isci.2020.101792] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023] Open
Abstract
The designed “ATCUN” motif (amino-terminal copper and nickel binding site) is a replica of naturally occurring ATCUN site found in many proteins/peptides, and an attractive platform for multiple applications, which include nucleases, proteases, spectroscopic probes, imaging, and small molecule activation. ATCUN motifs are engineered at periphery by conjugation to recombinant proteins, peptides, fluorophores, or recognition domains through chemically or genetically, fulfilling the needs of various biological relevance and a wide range of practical usages. This chemistry has witnessed significant growth over the last few decades and several interesting ATCUN derivatives have been described. The redox role of the ATCUN moieties is also an important aspect to be considered. The redox potential of designed M-ATCUN derivatives is modulated by judicious choice of amino acid (including stereochemistry, charge, and position) that ultimately leads to the catalytic efficiency. In this context, a wide range of M-ATCUN derivatives have been designed purposefully for various redox- and non-redox-based applications, including spectroscopic probes, target-based catalytic metallodrugs, inhibition of amyloid-β toxicity, and telomere shortening, enzyme inactivation, biomolecules stitching or modification, next-generation antibiotic, and small molecule activation.
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Affiliation(s)
- Biplab K Maiti
- National Institute of Technology Sikkim, Ravangla Campus, Barfung Block, Ravangla Sub Division, South Sikkim 737139, India
| | - Nidhi Govil
- National Institute of Technology Sikkim, Ravangla Campus, Barfung Block, Ravangla Sub Division, South Sikkim 737139, India
| | - Taraknath Kundu
- National Institute of Technology Sikkim, Ravangla Campus, Barfung Block, Ravangla Sub Division, South Sikkim 737139, India
| | - José J G Moura
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal
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13
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Tran KK, Jayawardena BM, Elphick MR, Jones CE. A gonadotropin-releasing hormone type neuropeptide with a high affinity binding site for copper(ii) and nickel(ii). Metallomics 2020; 11:404-414. [PMID: 30564813 DOI: 10.1039/c8mt00279g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In vertebrates gonadotropin-releasing hormone I (GnRH-I) is a key regulator of reproductive development and function. The receptor-binding activity of human GnRH-I can be modified by the presence of divalent copper. Thus, copper binding to N-terminal amino acids in GnRH-I induces structural changes that influence receptor interactions and downstream intracellular signalling cascades. It is not known if copper-binding is restricted to human GnRH-I or if it is also a feature of GnRH-type peptides that have been identified in other taxa. To investigate this, we have characterised copper binding to a recently discovered GnRH-type peptide from the starfish Asterias rubens (ArGnRH). Using a range of spectroscopic and biophysical techniques we show that this peptide can bind copper(ii) and nickel(ii). Copper(ii) is bound in a square-planar, high-affinity (Kd ∼ 10-12 M) site incorporating four nitrogen donor atoms from a histidine imidazole group, two amides and the N-terminal amine group. The ArGnRH copper affinity and geometry are quite different to GnRH-I suggesting the copper sites have evolved to suit the environment the peptides are exposed to. By comparing the copper binding sites in ArGnRH and human GnRH-I and conducting a phylogenetic analysis of GnRH-type peptide sequences from a range of species, we predict that copper-binding is an evolutionarily ancient feature of GnRH-type peptides that has been retained, modified or lost in different lineages.
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Affiliation(s)
- Kevin K Tran
- The School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, 2759, NSW, Australia.
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14
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Janicka-Kłos A, Janek T, Burger J, Czapor-Irzabek H. Human salivary MUC7 mucin fragment and its analogues. Coordination and biological studies. J Inorg Biochem 2020; 203:110923. [DOI: 10.1016/j.jinorgbio.2019.110923] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 11/08/2019] [Accepted: 11/12/2019] [Indexed: 12/17/2022]
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15
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Peacey L, Elphick MR, Jones CE. Roles of copper in neurokinin B and gonadotropin-releasing hormone structure and function and the endocrinology of reproduction. Gen Comp Endocrinol 2020; 287:113342. [PMID: 31783025 DOI: 10.1016/j.ygcen.2019.113342] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 11/24/2019] [Accepted: 11/25/2019] [Indexed: 11/30/2022]
Abstract
Copper is a metal ion present in all organisms, where it has well-known roles in association with proteins and enzymes essential for cellular processes. In the early decades of the twentieth century copper was shown to influence mammalian reproductive biology, and it was subsequently shown to exert effects primarily at the level of the pituitary gland and/or hypothalamic regions of the brain. Furthermore, it has been reported that copper can interact with key neuropeptides in the hypothalamic-pituitary-gonadal axis, notably gonadotropin-releasing hormone (GnRH) and neurokinin B. Interestingly, recent phylogenetic analysis of the sequences of GnRH-related peptides indicates that copper binding is an evolutionarily ancient property of this neuropeptide family, which has been variously retained, modified or lost in the different taxa. In this mini-review the metal-binding properties of neuropeptides in the vertebrate reproductive pathway are reviewed and the evolutionary and functional significance of copper binding by GnRH-related neuropeptides in vertebrates and invertebrates are discussed.
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Affiliation(s)
- Lorraine Peacey
- School of Science and Health, The University of Western Sydney, Locked Bag 1797, Penrith, New South Wales, Australia
| | - Maurice R Elphick
- Queen Mary University of London, School of Biological and Chemical Sciences, Mile End Road, London E14NS, UK
| | - Christopher E Jones
- School of Science and Health, The University of Western Sydney, Locked Bag 1797, Penrith, New South Wales, Australia.
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16
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Uceda AB, Mariño L, Adrover M, Vilanova B. Understanding metal binding in neuromedin C. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2019.119197] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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17
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Yu Z, Cowan JA. Design and applications of catalytic metallodrugs containing the ATCUN motif. Med Chem 2020. [DOI: 10.1016/bs.adioch.2019.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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The Cu(II) affinity of the N-terminus of human copper transporter CTR1: Comparison of human and mouse sequences. J Inorg Biochem 2019; 182:230-237. [PMID: 29402466 DOI: 10.1016/j.jinorgbio.2018.01.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 01/08/2018] [Accepted: 01/19/2018] [Indexed: 11/20/2022]
Abstract
Copper Transporter 1 (CTR1) is a homotrimeric membrane protein providing the main route of copper transport into eukaryotic cells from the extracellular milieu. Its N-terminal extracellular domain, rich in His and Met residues, is considered responsible for directing copper into the transmembrane channel. Most of vertebrate CTR1 proteins contain the His residue in position three from N-terminus, creating a well-known Amino Terminal Cu(II)- and Ni(II)-Binding (ATCUN) site. CTR1 from humans, primates and many other species contains the Met-Asp-His (MDH) sequence, while some rodents including mouse have the Met-Asn-His (MNH) N-terminal sequence. CTR1 is thought to collect Cu(II) ions from blood copper transport proteins, including albumin, but previous reports indicated that the affinity of N-terminal peptide/domain of CTR1 is significantly lower than that of albumin, casting serious doubt on this aspect of CTR1 function. Using potentiometry and spectroscopic techniques we demonstrated that MDH-amide, a tripeptide model of human CTR1 N-terminus, binds Cu(II) with K of 1.3 × 1013 M-1 at pH 7.4, ~13 times stronger than Human Serum Albumin (HSA), and MNH-amide is even stronger, K of 3.2 × 1014 M-1 at pH 7.4. These results indicate that the N-terminus of CTR1 may serve as intermediate binding site during Cu(II) transfer from blood copper carriers to the transporter. MDH-amide, but not MNH-amide also forms a low abundance complex with non-ATCUN coordination involving the Met amine, His imidazole and Asp carboxylate. This species might assist Cu(II) relay down the peptide chain or its reduction to Cu(I), both steps necessary for the CTR1 function.
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19
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Rai RK, Angelis AD, Greenwood A, Opella SJ, Cotten ML. Metal-ion Binding to Host Defense Peptide Piscidin 3 Observed in Phospholipid Bilayers by Magic Angle Spinning Solid-state NMR. Chemphyschem 2019; 20:295-301. [PMID: 30471190 PMCID: PMC6494093 DOI: 10.1002/cphc.201800855] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Revised: 11/21/2018] [Indexed: 12/21/2022]
Abstract
Cationic antimicrobial peptides (AMPs) are essential components of the innate immune system. They have attracted interest as novel compounds with the potential to treat infections associated with multi-drug resistant bacteria. In this study, we investigate piscidin 3 (P3), an AMP that was first discovered in the mast cells of hybrid striped bass. Prior studies showed that P3 is less active than its homolog piscidin 1 (P1) against planktonic bacteria. However, P3 has the advantage of being less toxic to mammalian cells and more active on biofilms and persister cells. Both P1 and P3 cross bacterial membranes and co-localize with intracellular DNA but P3 is more condensing to DNA while P1 is more membrane active. Recently, we showed that both peptides coordinate Cu2+ through an amino-terminal copper and nickel (ATCUN) motif. We also demonstrated that the bactericidal effects of P3 are linked to its ability to form radicals that nick DNA in the presence of Cu2+ . Since metal binding and membrane crossing by P3 is biologically important, we apply in this study solid-state NMR spectroscopy to uniformly 13 C-15 N-labeled peptide samples to structurally characterize the ATCUN motif of P3 bound to bilayers and coordinated to Ni2+ and Cu2+ . These experiments are supplemented with density functional theory calculations. Taken together, these studies refine the arrangement of not only the backbone but also side chain atoms of an AMP simultaneously bound to metal ions and phospholipid bilayers.
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Affiliation(s)
- Ratan Kumar Rai
- Department of Chemistry and Biochemistry University of California San Diego La Jolla, California 92093-0307 (USA)
| | - Anna De Angelis
- Department of Chemistry and Biochemistry University of California San Diego La Jolla, California 92093-0307 (USA)
| | - Alexander Greenwood
- Department of Applied Science, Department of Physics The College of William and Mary Williamsburg, VA 23185 (USA), Fax: (757)-221-2050,
| | - Stanley J. Opella
- Department of Chemistry and Biochemistry University of California San Diego La Jolla, California 92093-0307 (USA)
| | - Myriam L. Cotten
- Department of Applied Science, Department of Physics The College of William and Mary Williamsburg, VA 23185 (USA), Fax: (757)-221-2050,
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20
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Santoro A, Walke G, Vileno B, Kulkarni PP, Raibaut L, Faller P. Low catalytic activity of the Cu(ii)-binding motif (Xxx-Zzz-His; ATCUN) in reactive oxygen species production and inhibition by the Cu(i)-chelator BCS. Chem Commun (Camb) 2018; 54:11945-11948. [PMID: 30288543 DOI: 10.1039/c8cc06040a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The catalytic redox activity of Cu(ii) bound to the motif NH2-Xxx-Zzz-His (ATCUN) with ascorbate and H2O2/O2 is very low and can be stopped via Cu(i)-chelation. This impacts its application as an artificial Cu-enzyme to degrade biomolecules via production of reactive oxygen species in a Cu(i)-chelator rich environment like the cytosol.
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Affiliation(s)
- Alice Santoro
- Institut de Chimie, UMR 7177, CNRS-Université de Strasbourg, 4 rue Blaise Pascal, 67000, Strasbourg, France.
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21
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Dunbar RC, Martens J, Berden G, Oomens J. Binding of Divalent Metal Ions with Deprotonated Peptides: Do Gas-Phase Anions Parallel the Condensed Phase? J Phys Chem A 2018; 122:5589-5596. [PMID: 29847124 PMCID: PMC6026845 DOI: 10.1021/acs.jpca.8b02926] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
![]()
Chelation complexes
of the histidine-containing tripeptides HisAlaAla,
AlaHisAla, and AlaAlaHis with Ni(II) and Cu(II) having a −1
net charge are characterized in the gas phase by infrared multiple-photon
dissociation (IRMPD) spectroscopy and density functional theory calculations.
We address the question of whether the gas-phase complexes carry over
characteristics from the corresponding condensed-phase species. We
focus particularly on three aspects of their structure: (i) square-planar
chelation by the deprotonated amide nitrogens around the metal ion
(low-spin for the Ni case), (ii) metal-ion coordination of the imidazole
side chain nitrogen, and (iii) the exceptional preference for metal-ion
chelation by peptides with His in the third position from the N-terminus,
as in the amino terminal Cu and Ni (ATCUN) motif. We find that square-planar
binding around the metal ion, involving bonds to both deprotonated
backbone nitrogens, one of the carboxylate oxygens and the N-terminal
nitrogen, is the dominant binding motif for all three isomers. In
contrast to the condensed-phase behavior, the dominant mode of binding
for all three isomers does not involve the imidazole side chain, which
is instead placed outside the coordination zone. Only for the AlaAlaHis
isomer, the imidazole-bound structure is also detected as a minority
population, as identified from a distinctive short-wavelength IR absorption.
The observation that this conformation exists only for AlaAlaHis correlates
with condensed-phase behavior at neutral-to-basic pH, in the sense
that the isomer with His in the third position is exceptionally disposed
to metal ion chelation by four nitrogen atoms (4N) when compared with
the other isomers. These results also emphasize the divergence between
the conformational stabilities in the gas phase and in solution or
crystalline environments: in the gas phase, direct metal binding of
the imidazole is overall less favorable than the alternative of a
remote imidazole that can act as an intramolecular H-bond donor enhancing
the gas-phase stability.
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Affiliation(s)
- Robert C Dunbar
- Chemistry Department , Case Western Reserve University , Cleveland , Ohio 44106 , United States
| | - Jonathan Martens
- Radboud University, Institute for Molecules and Materials , FELIX Laboratory , Toernooiveld 7c , 6525ED Nijmegen , The Netherlands
| | - Giel Berden
- Radboud University, Institute for Molecules and Materials , FELIX Laboratory , Toernooiveld 7c , 6525ED Nijmegen , The Netherlands
| | - Jos Oomens
- Radboud University, Institute for Molecules and Materials , FELIX Laboratory , Toernooiveld 7c , 6525ED Nijmegen , The Netherlands.,University of Amsterdam , Science Park 904 , 1098XH Amsterdam , The Netherlands
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22
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Gonzalez P, Bossak K, Stefaniak E, Hureau C, Raibauta L, Balc W, Faller P. N-Terminal Cu-Binding Motifs (Xxx-Zzz-His, Xxx-His) and Their Derivatives: Chemistry, Biology and Medicinal Applications. Chemistry 2018; 24:8029-8041. [PMID: 29336493 PMCID: PMC6152890 DOI: 10.1002/chem.201705398] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Indexed: 12/28/2022]
Abstract
Peptides and proteins with N-terminal amino acid sequences NH2 -Xxx-His (XH) and NH2 -Xxx-Zzz-His (XZH) form well-established high-affinity CuII -complexes. Key examples are Asp-Ala-His (in serum albumin) and Gly-His-Lys, the wound healing factor. This opens a straightforward way to add a high-affinity CuII -binding site to almost any peptide or protein, by chemical or recombinant approaches. Thus, these motifs, NH2 -Xxx-Zzz-His in particular, have been used to equip peptides and proteins with a multitude of functions based on the redox activity of Cu, including nuclease, protease, glycosidase, or oxygen activation properties, useful in anticancer or antimicrobial drugs. More recent research suggests novel biological functions, mainly based on the redox inertness of CuII in XZH, like PET imaging (with 64 Cu), chelation therapies (for instance in Alzheimer's disease and other types of neurodegeneration), antioxidant units, Cu transporters and activation of biological functions by strong CuII binding. This Review gives an overview of the chemical properties of Cu-XH and -XZH motifs and discusses the pros and cons of the vastly different biological applications, and how they could be improved depending on the application.
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Affiliation(s)
- Paulina Gonzalez
- Institut de Chimie, UMR 7177,CNRS-Université de Strasbourg 4 rue Blaise Pascal, 67000, Strasbourg, France
- University of Strasbourg Institute for Advanced Study (USIAS), Strasbourg, France
| | - Karolina Bossak
- Institute of Biochemistry and Biophysics, dediPolish Academy of
Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
| | - Ewelina Stefaniak
- Institute of Biochemistry and Biophysics, dediPolish Academy of
Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
| | - Christelle Hureau
- University of Strasbourg Institute for Advanced Study (USIAS), Strasbourg, France
- CNRS; LCC (Laboratoire de Chimie de Coordination) 205, route de Narbonne, F-31077 Toulouse, France
- Université de Toulouse, UPS, INPT ; LCC; F-31077 Toulouse, France
| | - Laurent Raibauta
- Institut de Chimie, UMR 7177,CNRS-Université de Strasbourg 4 rue Blaise Pascal, 67000, Strasbourg, France
| | - Wojciech Balc
- Institute of Biochemistry and Biophysics, dediPolish Academy of
Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
| | - Peter Faller
- Institut de Chimie, UMR 7177,CNRS-Université de Strasbourg 4 rue Blaise Pascal, 67000, Strasbourg, France
- University of Strasbourg Institute for Advanced Study (USIAS), Strasbourg, France
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23
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A Naturally Encoded Dipeptide Handle for Bioorthogonal Chan–Lam Coupling. Angew Chem Int Ed Engl 2018; 57:4015-4019. [DOI: 10.1002/anie.201800828] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Indexed: 11/07/2022]
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24
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Ohata J, Zeng Y, Segatori L, Ball ZT. A Naturally Encoded Dipeptide Handle for Bioorthogonal Chan–Lam Coupling. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201800828] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jun Ohata
- Department of Chemistry Rice University Houston TX 77005 USA
| | - Yimeng Zeng
- Department of Chemical Biomolecular Engineering Rice University Houston TX 77005 USA
| | - Laura Segatori
- Department of Chemical Biomolecular Engineering Rice University Houston TX 77005 USA
| | - Zachary T. Ball
- Department of Chemistry Rice University Houston TX 77005 USA
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25
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Agbale CM, Cardoso MH, Galyuon IK, Franco OL. Designing metallodrugs with nuclease and protease activity. Metallomics 2017; 8:1159-1169. [PMID: 27714031 DOI: 10.1039/c6mt00133e] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The accidental discovery of cisplatin some 50 years ago generated renewed interest in metallopharmaceuticals. Beyond cisplatin, many useful metallodrugs have been synthesized for the diagnosis and treatment of various diseases, but toxicity concerns, and the propensity to induce chemoresistance and secondary cancers make it imperative to search for novel metallodrugs that address these limitations. The Amino Terminal Cu(ii) and Ni(ii) (ATCUN) binding motif has emerged as a suitable template to design catalytic metallodrugs with nuclease and protease activities. Unlike their classical counterparts, ATCUN-based metallodrugs exhibit low toxicity, employ novel mechanisms to irreversibly inactivate disease-associated genes or proteins providing in principle, a channel to circumvent the rapid emergence of chemoresistance. The ATCUN motif thus presents novel strategies for the treatment of many diseases including cancers, HIV and infections caused by drug-resistant bacteria at the genetic level. This review discusses their design, mechanisms of action and potential for further development to expand their scope of application.
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Affiliation(s)
- Caleb Mawuli Agbale
- School of Biological Sciences, College of Agriculture and Natural Sciences, University of Cape Coast, Cape Coast, Ghana and S-Inova Biotech, Programa de Pós-Graduação em Biotecnologia, Universidade Católica Dom Bosco, 79117-900 Campo Grande, MS, Brazil.
| | - Marlon Henrique Cardoso
- S-Inova Biotech, Programa de Pós-Graduação em Biotecnologia, Universidade Católica Dom Bosco, 79117-900 Campo Grande, MS, Brazil. and Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, 70719-100 Brasília, DF, Brazil and Programa de Pós-Graduação em Patologia Molecular, Faculdade de Medicina, Universidade de Brasília, 70910-900 Brasília, DF, Brazil
| | - Isaac Kojo Galyuon
- School of Biological Sciences, College of Agriculture and Natural Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Octávio Luiz Franco
- S-Inova Biotech, Programa de Pós-Graduação em Biotecnologia, Universidade Católica Dom Bosco, 79117-900 Campo Grande, MS, Brazil. and Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, 70719-100 Brasília, DF, Brazil and Programa de Pós-Graduação em Patologia Molecular, Faculdade de Medicina, Universidade de Brasília, 70910-900 Brasília, DF, Brazil
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26
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Bucci JC, McClintock CS, Chu Y, Ware GL, McConnell KD, Emerson JP, Peterson CB. Resolving distinct molecular origins for copper effects on PAI-1. J Biol Inorg Chem 2017; 22:1123-1135. [PMID: 28913669 PMCID: PMC5613068 DOI: 10.1007/s00775-017-1489-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2017] [Accepted: 08/24/2017] [Indexed: 11/19/2022]
Abstract
Components of the fibrinolytic system are subjected to stringent control to maintain proper hemostasis. Central to this regulation is the serpin plasminogen activator inhibitor-1 (PAI-1), which is responsible for specific and rapid inhibition of fibrinolytic proteases. Active PAI-1 is inherently unstable and readily converts to a latent, inactive form. The binding of vitronectin and other ligands influences stability of active PAI-1. Our laboratory recently observed reciprocal effects on the stability of active PAI-1 in the presence of transition metals, such as copper, depending on the whether vitronectin was also present (Thompson et al. Protein Sci 20:353–365, 2011). To better understand the molecular basis for these copper effects on PAI-1, we have developed a gel-based copper sensitivity assay that can be used to assess the copper concentrations that accelerate the conversion of active PAI-1 to a latent form. The copper sensitivity of wild-type PAI-1 was compared with variants lacking N-terminal histidine residues hypothesized to be involved in copper binding. In these PAI-1 variants, we observed significant differences in copper sensitivity, and these data were corroborated by latency conversion kinetics and thermodynamics of copper binding by isothermal titration calorimetry. These studies identified a copper-binding site involving histidines at positions 2 and 3 that confers a remarkable stabilization of PAI-1 beyond what is observed with vitronectin alone. A second site, independent from the two histidines, binds metal and increases the rate of the latency conversion.
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Affiliation(s)
- Joel C Bucci
- Department of Biochemistry and Cellular and Molecular Biology, University of Tennessee, Walters Life Sciences Building, 1414 Cumberland Avenue, Knoxville, TN, 37996, USA.,Department of Biological Sciences, A221 Life Sciences Annex, Louisiana State University, Baton Rouge, LA, 70803, USA
| | - Carlee S McClintock
- Department of Biochemistry and Cellular and Molecular Biology, University of Tennessee, Walters Life Sciences Building, 1414 Cumberland Avenue, Knoxville, TN, 37996, USA
| | - Yuzhuo Chu
- Department of Biological Sciences, A221 Life Sciences Annex, Louisiana State University, Baton Rouge, LA, 70803, USA
| | - Gregory L Ware
- Department of Biological Sciences, A221 Life Sciences Annex, Louisiana State University, Baton Rouge, LA, 70803, USA
| | - Kayla D McConnell
- Department of Chemistry, Mississippi State University, Box 1115, Starkville, MS, 39762, USA
| | - Joseph P Emerson
- Department of Chemistry, Mississippi State University, Box 1115, Starkville, MS, 39762, USA
| | - Cynthia B Peterson
- Department of Biochemistry and Cellular and Molecular Biology, University of Tennessee, Walters Life Sciences Building, 1414 Cumberland Avenue, Knoxville, TN, 37996, USA. .,Department of Biological Sciences, A221 Life Sciences Annex, Louisiana State University, Baton Rouge, LA, 70803, USA.
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