1
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Ackermann K, Wu D, Stewart AJ, Bode BE. EPR spectroscopic characterisation of native Cu II-binding sites in human serum albumin. Dalton Trans 2024; 53:13529-13536. [PMID: 39072685 PMCID: PMC11320662 DOI: 10.1039/d4dt00892h] [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: 03/26/2024] [Accepted: 07/17/2024] [Indexed: 07/30/2024]
Abstract
Human serum albumin (HSA) is the most abundant plasma protein, which functions to transport a large range of ligands within the circulation. These interactions have important implications for human health and disease. The primary binding site for CuII ions on HSA is known to be the so-called amino-terminal CuII and NiII binding (ATCUN) motif. However, the number and identity of secondary binding sites is currently not understood. In this study, we harnessed a suite of contemporary electron paramagnetic resonance (EPR) spectroscopy methods to investigate recombinantly produced constructs of HSA bearing single-histidine knockouts, with the aim to characterise its endogenous CuII ion binding sites.
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Affiliation(s)
- Katrin Ackermann
- EaStCHEM School of Chemistry, Biomedical Sciences Research Complex, and Centre of Magnetic Resonance, University of St Andrews, St Andrews, KY16 9ST, UK
| | - Dongmei Wu
- School of Medicine, Biomedical Sciences Research Complex, and Centre of Magnetic Resonance, University of St Andrews, St Andrews, KY16 9TF, UK.
| | - Alan J Stewart
- School of Medicine, Biomedical Sciences Research Complex, and Centre of Magnetic Resonance, University of St Andrews, St Andrews, KY16 9TF, UK.
| | - Bela E Bode
- EaStCHEM School of Chemistry, Biomedical Sciences Research Complex, and Centre of Magnetic Resonance, University of St Andrews, St Andrews, KY16 9ST, UK
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2
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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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3
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Lu Y, Wei X, Chen M, Wang J. Non-ceruloplasmin-bound copper and copper speciation in serum with extraction using functionalized dendritic silica spheres followed by ICP-MS detection. Anal Chim Acta 2023; 1251:340993. [PMID: 36925285 DOI: 10.1016/j.aca.2023.340993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 02/15/2023] [Accepted: 02/16/2023] [Indexed: 02/19/2023]
Abstract
The quantification of non-ceruloplasmin-bound copper (NCBC) and total copper in biological fluids is highly required for understanding the correlation of copper with various physiological processes and diseases. In the present work, we developed dendritic spherical silica particles functionalized with EDTA, shortly as DMSPs-EDTA, from the hydrolysis of tetraethyl orthosilicate with the aid of structure-directing agents and subsequent modification of EDTA. DMSPs-EDTA serves as adsorbent with abundant binding sites to facilitate efficient extraction of NCBC. The retained NCBC on DMSPs-EDTA may be readily recovered by stripping with HNO3 (2 mol L-1). By hyphenating with ICP-MS detection, it provides a limit of detection of 1.3 pmol for NCBC. The degradation of ceruloplasmin with 200 mmol L-1 H2O2 releases the bound copper as NCBC to distribute among other ligands, which may be efficiently retained by the adsorbent and facilitate the detection of total copper. The linear ranges of 0.21-10 μmol L-1 and 0.42-30 μmol L-1 were derived for the detection of NCBC and total copper. The recovery rates for spiked NCBC or total copper in serum were derived to be 97-108% and 94-102%, respectively. The analysis of serum for a healthy subject resulted in 1.8 μmol L-1 NCBC and 9.5 μmol L-1 total copper. In addition, the proportions of 8.5-12% for NCBC were derived from the serum of healthy adults, while those for the patients with lung, hepatocellular and esophageal carcinoma were found to be 10-12%, illustrating no obvious difference against the normal group.
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Affiliation(s)
- Yi Lu
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang, 110819, PR China
| | - Xing Wei
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang, 110819, PR China
| | - Mingli Chen
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang, 110819, PR China.
| | - Jianhua Wang
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang, 110819, PR China.
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4
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Schulte NB, Pushie MJ, Martinez A, Sendzik M, Escobedo M, Kuter K, Haas KL. Exploration of the Potential Role of Serum Albumin in the Delivery of Cu(I) to Ctr1. Inorg Chem 2023; 62:4021-4034. [PMID: 36826341 DOI: 10.1021/acs.inorgchem.2c03753] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Human serum albumin (HSA) is the major copper (Cu) carrier in blood. The majority of previous studies that have investigated Cu interactions with HSA have focused primarily on the Cu(II) oxidation state. Yet, cellular Cu uptake by the human copper transport protein (Ctr1), a plasma membrane-embedded protein responsible for Cu uptake into cells, requires Cu(I). Recent in vitro work has determined that reducing agents, such as the ascorbate present in blood, are sufficient to reduce the Cu(II)HSA complex to form Cu(I)HSA and that Cu(I) is bound to HSA with pM affinity. The biological accessibility of Cu(I)HSA suggests that HSA-bound Cu(I) may be an unappreciated form of Cu cargo and a key player in extracellular Cu trafficking. To better understand Cu trafficking by HSA, we sought to investigate the exchange of Cu(I) from HSA to a model peptide of the Cu-binding ectodomain of Ctr1. In this study, we used X-ray absorption near-edge spectroscopy to show that Cu(I) becomes more highly coordinated as increasing amounts of the Ctr1-14 model peptide are added to a solution of Cu(I)HSA. Extended X-ray absorption fine structure (EXAFS) spectroscopy was used to further characterize the interaction of Cu(I)HSA with Ctr1-14 by determining the ligands coordinating Cu(I) and their bond lengths. The EXAFS data support that some Cu(I) likely undergoes complete transfer from HSA to Ctr1-14. This finding of HSA interacting with and releasing Cu(I) to an ectodomain model peptide of Ctr1 suggests a mechanism by which HSA delivers Cu(I) to cells under physiological conditions.
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Affiliation(s)
- Natalie B Schulte
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
| | - M Jake Pushie
- Department of Surgery, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E5, Canada
| | - Ana Martinez
- Department of Chemistry and Physics, Saint Mary's College, Notre Dame, Indiana 46556, United States
| | - Madison Sendzik
- Department of Chemistry and Physics, Saint Mary's College, Notre Dame, Indiana 46556, United States
| | - Maria Escobedo
- Department of Mathematics and Computer Science, Saint Mary's College, Notre Dame, Indiana 46556, United States
| | - Kristin Kuter
- Department of Mathematics and Computer Science, Saint Mary's College, Notre Dame, Indiana 46556, United States
| | - Kathryn L Haas
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
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5
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Pivarcsik T, Pósa V, Kovács H, May NV, Spengler G, Pósa SP, Tóth S, Nezafat Yazdi Z, Özvegy-Laczka C, Ugrai I, Szatmári I, Szakács G, Enyedy ÉA. Metal Complexes of a 5-Nitro-8-Hydroxyquinoline-Proline Hybrid with Enhanced Water Solubility Targeting Multidrug Resistant Cancer Cells. Int J Mol Sci 2022; 24:ijms24010593. [PMID: 36614037 PMCID: PMC9820345 DOI: 10.3390/ijms24010593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/20/2022] [Accepted: 12/23/2022] [Indexed: 12/31/2022] Open
Abstract
Multidrug resistance (MDR) in cancer is one of the major obstacles of chemotherapy. We have recently identified a series of 8-hydroxyquinoline Mannich base derivatives with MDR-selective toxicity, however with limited solubility. In this work, a novel 5-nitro-8-hydroxyquinoline-proline hybrid and its Rh(η5-C5Me5) and Ru(η6-p-cymene) complexes with excellent aqueous solubility were developed, characterized, and tested against sensitive and MDR cells. Complex formation of the ligand with essential metal ions was also investigated using UV-visible, circular dichroism, 1H NMR (Zn(II)), and electron paramagnetic resonance (Cu(II)) spectroscopic methods. Formation of mono and bis complexes was found in all cases with versatile coordination modes, while tris complexes were also formed with Fe(II) and Fe(III) ions, revealing the metal binding affinity of the ligand at pH 7.4: Cu(II) > Zn(II) > Fe(II) > Fe(III). The ligand and its Rh(III) complex displayed enhanced cytotoxicity against the resistant MES-SA/Dx5 and Colo320 human cancer cell lines compared to their chemosensitive counterparts. Both organometallic complexes possess high stability in solution, however the Ru(II) complex has lower chloride ion affinity and slower ligand exchange processes, along with the readiness to lose the arene ring that is likely connected to its inactivity.
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Affiliation(s)
- Tamás Pivarcsik
- MTA-SZTE Lendület Functional Metal Complexes Research Group, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
- Department of Inorganic and Analytical Chemistry, Interdisciplinary Excellence Centre, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
| | - Vivien Pósa
- MTA-SZTE Lendület Functional Metal Complexes Research Group, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
- Department of Inorganic and Analytical Chemistry, Interdisciplinary Excellence Centre, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
| | - Hilda Kovács
- MTA-SZTE Lendület Functional Metal Complexes Research Group, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
- Department of Inorganic and Analytical Chemistry, Interdisciplinary Excellence Centre, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
| | - Nóra V. May
- Centre for Structural Science, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar Tudósok krt. 2, H-1117 Budapest, Hungary
| | - Gabriella Spengler
- MTA-SZTE Lendület Functional Metal Complexes Research Group, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
- Department of Medical Microbiology, Albert Szent-Györgyi Health Center, Albert Szent-Györgyi Medical School, University of Szeged, Semmelweis u. 6, H-6725 Szeged, Hungary
| | - Szonja P. Pósa
- Drug Resistance Research Group, Institute of Enzymology, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar Tudósok krt. 2, H-1117 Budapest, Hungary
- National Laboratory for Drug Research and Development, Magyar Tudósok krt. 2, H-1117 Budapest, Hungary
| | - Szilárd Tóth
- Drug Resistance Research Group, Institute of Enzymology, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar Tudósok krt. 2, H-1117 Budapest, Hungary
- National Laboratory for Drug Research and Development, Magyar Tudósok krt. 2, H-1117 Budapest, Hungary
| | - Zeinab Nezafat Yazdi
- Drug Resistance Research Group, Institute of Enzymology, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar Tudósok krt. 2, H-1117 Budapest, Hungary
| | - Csilla Özvegy-Laczka
- Drug Resistance Research Group, Institute of Enzymology, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar Tudósok krt. 2, H-1117 Budapest, Hungary
| | - Imre Ugrai
- Institute of Pharmaceutical Chemistry and Stereochemistry Research Group, Eötvös Loránd Research Network, University of Szeged, Eötvös u. 6, H-6720 Szeged, Hungary
| | - István Szatmári
- Institute of Pharmaceutical Chemistry and Stereochemistry Research Group, Eötvös Loránd Research Network, University of Szeged, Eötvös u. 6, H-6720 Szeged, Hungary
| | - Gergely Szakács
- Drug Resistance Research Group, Institute of Enzymology, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar Tudósok krt. 2, H-1117 Budapest, Hungary
- Institute of Cancer Research, Medical University of Vienna, Borschkegasse 8a, A-1090 Vienna, Austria
| | - Éva A. Enyedy
- MTA-SZTE Lendület Functional Metal Complexes Research Group, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
- Department of Inorganic and Analytical Chemistry, Interdisciplinary Excellence Centre, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
- Correspondence:
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6
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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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7
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Interactions between copper (II) and β-amyloid peptide using capillary electrophoresis-ICP-MS: Kd measurements at the nanogram scale. Anal Bioanal Chem 2021; 414:5347-5355. [PMID: 34812903 DOI: 10.1007/s00216-021-03769-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 10/28/2021] [Accepted: 11/02/2021] [Indexed: 10/19/2022]
Abstract
Although the interaction between the β-amyloid peptide and copper (II) appears to play an important role in Alzheimer's disease, the affinity constant is still controversial and values are ranging from 107 to 1011 M-1. With the aim of clarifying this point, a complementary method, based on the capillary electrophoresis-ICP-MS hyphenation, was developed and competitive binding experiments were conducted in the presence of nitrilotriacetic acid. The effect of the capillary surface (neutral or positively charged) and nature of the buffer (Tris or Hepes) have been studied. Tris buffer was found to be inappropriate for such determination as it enhances the dissociation of copper (II) complexes, already occurring in the presence of an electric field in capillary electrophoresis. Using Hepes, a value of 1010 M-1 was found for the affinity of the small β-amyloid peptide 1-16 for copper (II), which is in agreement with the values obtained for other proteins involved in neurodegenerative diseases. These constants were also determined in conditions closer to those of biological media (higher ionic strength, presence of carbonates).
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8
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Tsikas D, Gambaryan S. Nitrous anhydrase activity of carbonic anhydrase II: cysteine is required for nitric oxide (NO) dependent phosphorylation of VASP in human platelets. J Enzyme Inhib Med Chem 2021; 36:525-534. [PMID: 33508993 PMCID: PMC7875556 DOI: 10.1080/14756366.2021.1874946] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The carbonic anhydrase (CA) family does not only catalyse the reversible hydration of CO2 to bicarbonate, but it also possesses esterase and phosphatase activity. Recently, bovine CA II and human CA II have been reported to convert inorganic nitrite (O=N-O−) to nitric oxide (NO) and nitrous anhydride (N2O3). Given the ability of NO to mediate vasodilation and inhibit platelet aggregation, this CA II activity would represent a bioactivation of nitrite. There are contradictory reports in the literature and the physiological role of CA II nitrite bioactivation is still disputed. Here, we provide new experimental data in support of the nitrous anhydrase activity of CA II and the key role L-cysteine in the bioactivation of nitrite by CA II. Using washed human platelets and by measuring VASP phosphorylation we provide evidence that exogenous nitrite (10 µM) is bioactivated to NO in a manner strongly depending on L-cysteine (100 and 200 µM). The process is not inhibitable by acetazolamide, a potent CA inhibitor. The contradictory results of recently published studies in this area are thoroughly discussed.
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Affiliation(s)
- Dimitrios Tsikas
- Institute of Toxicology, Core Unit Proteomics, Hannover Medical School, Hannover, Germany
| | - Stepan Gambaryan
- Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, Petersburg, Russia
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9
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Beuning CN, Zocchi LJ, Malikidogo KP, Esmieu C, Dorlet P, Crans DC, Hureau C. Measurement of Interpeptidic Cu II Exchange Rate Constants of Cu II-Amyloid-β Complexes to Small Peptide Motifs by Tryptophan Fluorescence Quenching. Inorg Chem 2021; 60:7650-7659. [PMID: 33983723 DOI: 10.1021/acs.inorgchem.0c03555] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The interpeptidic CuII exchange rate constants were measured for two Cu amyloid-β complexes, Cu(Aβ1-16) and Cu(Aβ1-28), to fluorescent peptides GHW and DAHW using a quantitative tryptophan fluorescence quenching methodology. The second-order rate constants were determined at three pH values (6.8, 7.4, and 8.7) important to the two Cu(Aβ) coordination complexes, components Cu(Aβ)I and Cu(Aβ)II. The interpeptidic CuII exchange rate constant is approximately 104 M-1 s-1 but varies in magnitude depending on many variables. These include pH, length of the Aβ peptide, location of the anchoring histidine ligand in the fluorescent peptide, number of amide deprotonations required in the tryptophan peptide to coordinate CuII, and interconversion between Cu(Aβ)I and Cu(Aβ)II. We also present EPR data probing the CuII exchange between peptides and the formation of ternary species between Cu(Aβ) and GHW. As the nonfluorescent GHK and DAHK peptides are important motifs found in the blood and serum, their ability to sequester CuII ions from Cu(Aβ) complexes may be relevant for the metal homeostasis and its implication in Alzheimer's disease. Thus, their kinetic CuII interpeptidic exchange rate constants are important chemical rate constants that can help elucidate the complex CuII trafficking puzzle in the synaptic cleft.
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Affiliation(s)
- Cheryle N Beuning
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Luca J Zocchi
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | | | | | - Pierre Dorlet
- CNRS, Aix-Marseille Université, Laboratoire de Bioénergétique et Ingénierie des Protéines, IMM, 13400 Marseille, France
| | - Debbie C Crans
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
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10
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Binding Models of Copper(II) Thiosemicarbazone Complexes with Human Serum Albumin: A Speciation Study. Molecules 2021; 26:molecules26092711. [PMID: 34063080 PMCID: PMC8125041 DOI: 10.3390/molecules26092711] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 04/29/2021] [Accepted: 05/03/2021] [Indexed: 11/24/2022] Open
Abstract
Copper(II) complexes of thiosemicarbazones (TSCs) often exhibit anticancer properties, and their pharmacokinetic behavior can be affected by their interaction with blood transport proteins. Interaction of copper(II) complexes of an {N,N,S} donor α-N-pyridyl TSC (Triapine) and an {O,N,S} donor 2-hydroxybenzaldehyde TSC (STSC) with human serum albumin (HSA) was investigated by UV–visible and electron paramagnetic resonance spectroscopy at physiological pH. Asp-Ala-His-Lys and the monodentate N-methylimidazole were also applied as binding models. Conditional formation constants were determined for the ternary copper(II)-TSC complexes formed with HSA, DAHK, and N-methylimidazole based on the spectral changes of both charge transfer and d-d bands. The neutral N-methylimidazole displays a similar binding affinity to both TSC complexes. The partially negatively charged tetrapeptide binds stronger to the positively charged Triapine complex in comparison to the neutral STSC complex, while the opposite trend was observed for HSA, which demonstrates the limitations of the use of simple ligands to model the protein binding. The studied TSC complexes are able to bind to HSA in a fast process, and the conditional constants suggest that their binding strength is only weak-to-moderate.
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11
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Portelinha J, Heilemann K, Jin J, Angeles-Boza AM. Unraveling the implications of multiple histidine residues in the potent antimicrobial peptide Gaduscidin-1. J Inorg Biochem 2021; 219:111391. [PMID: 33770667 DOI: 10.1016/j.jinorgbio.2021.111391] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 02/07/2021] [Accepted: 02/07/2021] [Indexed: 12/26/2022]
Abstract
The development of antimicrobial peptides (AMPs) as potential therapeutics requires resolving the foundational principles behind their structure-activity relationships. The role of histidine residues within AMPs remains a mystery despite the fact that several potent peptides containing this amino acid are being considered for further clinical development. Gaduscidin-1 (Gad-1) is a potent AMP from Atlantic cod fish that has a total of five His residues. Herein, the role of His residues and metal-potentiated activity of Gad-1 was studied. The five His residues contribute to the broad-spectrum activity of Gad-1. We demonstrated that Gad-1 can coordinate two Cu2+ ions, one at the N-terminus and one at the C-terminus, where the C-terminal binding site is a novel Cu2+ binding motif. High affinity Cu2+ binding at both sites was observed using mass spectrometry and isothermal titration calorimetry. Electron paramagnetic resonance was used to determine the coordination environment of the Cu2+ ions. Cu2+ binding was shown to be responsible for an increase in antimicrobial activity and a new mode of action. Along with the traditional AMP mode of action of pore formation, Gad-1 in the presence of Cu2+ (per)oxidizes lipids. Importantly, His3, His11, His17, and His21 were found to be important to lipid (per)oxidation. This insight will help further understand the inclusion and role of His residues in AMPs, the role of the novel C-terminal binding site, and can contribute to the field of designing potent AMPs that bind metal ions to potentiate activity.
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Affiliation(s)
- Jasmin Portelinha
- Department of Chemistry, University of Connecticut, 55 N. Eagleville Road, Storrs, CT 06269, United States of America
| | - Kara Heilemann
- Department of Chemistry, University of Connecticut, 55 N. Eagleville Road, Storrs, CT 06269, United States of America
| | - Jing Jin
- Magnetic Resonance Center, Boston College, 2609 Beacon Street, Chestnut Hill, MA 02467, United States of America
| | - Alfredo M Angeles-Boza
- Department of Chemistry, University of Connecticut, 55 N. Eagleville Road, Storrs, CT 06269, United States of America; Institute of Material Science, University of Connecticut, 97 N. Eagleville Road, Storrs, CT 06269, United States of America.
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12
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Skomorokhova EA, Sankova TP, Orlov IA, Savelev AN, Magazenkova DN, Pliss MG, Skvortsov AN, Sosnin IM, Kirilenko DA, Grishchuk IV, Sakhenberg EI, Polishchuk EV, Brunkov PN, Romanov AE, Puchkova LV, Ilyechova EY. Size-Dependent Bioactivity of Silver Nanoparticles: Antibacterial Properties, Influence on Copper Status in Mice, and Whole-Body Turnover. Nanotechnol Sci Appl 2020; 13:137-157. [PMID: 33408467 PMCID: PMC7781014 DOI: 10.2147/nsa.s287658] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 12/04/2020] [Indexed: 12/14/2022] Open
Abstract
Purpose The ability of silver nanoparticles (AgNPs) of different sizes to influence copper metabolism in mice is assessed. Materials and Methods AgNPs with diameters of 10, 20, and 75 nm were fabricated through a chemical reduction of silver nitrate and characterized by UV/Vis spectrometry, transmission and scanning electronic microscopy, and laser diffractometry. To test their bioactivity, Escherichia coli cells, cultured A549 cells, and C57Bl/6 mice were used. The antibacterial activity of AgNPs was determined by inhibition of colony-forming ability, and cytotoxicity was tested using the MTT test (viability, %). Ceruloplasmin (Cp, the major mammalian extracellular copper-containing protein) concentration and enzymatic activity were measured using gel-assay analyses and WB, respectively. In vitro binding of AgNPs with serum proteins was monitored with UV/Vis spectroscopy. Metal concentrations were measured using atomic absorption spectrometry. Results The smallest AgNPs displayed the largest dose- and time-dependent antibacterial activity. All nanoparticles inhibited the metabolic activity of A549 cells in accordance with dose and time, but no correlation between cytotoxicity and nanoparticle size was found. Nanosilver was not uniformly distributed through the body of mice intraperitoneally treated with low AgNP concentrations. It was predominantly accumulated in liver. There, nanosilver was included in ceruloplasmin, and Ag-ceruloplasmin with low oxidase activity level was formed. Larger nanoparticles more effectively interfered with the copper metabolism of mice. Large AgNPs quickly induced a drop of blood serum oxidase activity to practically zero, but after cancellation of AgNP treatment, the activity was rapidly restored. A major fraction of the nanosilver was excreted in the bile with Cp. Nanosilver was bound by alpha-2-macroglobulin in vitro and in vivo, but silver did not substitute for the copper atoms of Cp in vitro. Conclusion The data showed that even at low concentrations, AgNPs influence murine copper metabolism in size-dependent manner. This property negatively correlated with the antibacterial activity of AgNPs.
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Affiliation(s)
- Ekaterina A Skomorokhova
- International Research Center of Functional Materials and Devices of Optoelectronics, ITMO University, St. Petersburg, Russia.,Department of Molecular Genetics, Research Institute of Experimental Medicine, St. Petersburg, Russia
| | - Tatiana P Sankova
- Higher Engineering Physics School of the Institute of Physics, Nanotechnology and Telecommunications, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia
| | - Iurii A Orlov
- International Research Center of Functional Materials and Devices of Optoelectronics, ITMO University, St. Petersburg, Russia
| | - Andrew N Savelev
- Higher Engineering Physics School of the Institute of Physics, Nanotechnology and Telecommunications, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia
| | - Daria N Magazenkova
- Higher Engineering Physics School of the Institute of Physics, Nanotechnology and Telecommunications, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia
| | - Mikhail G Pliss
- Department of Experimental Physiology and Pharmacology, Almazov National Medical Research Centre, St. Petersburg, Russia.,Laboratory of Blood Circulation Biophysics, Pavlov First Saint Petersburg State Medical University, St. Petersburg, Russia
| | - Alexey N Skvortsov
- Higher Engineering Physics School of the Institute of Physics, Nanotechnology and Telecommunications, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia
| | - Ilya M Sosnin
- International Research Center of Functional Materials and Devices of Optoelectronics, ITMO University, St. Petersburg, Russia
| | - Demid A Kirilenko
- International Research Center of Functional Materials and Devices of Optoelectronics, ITMO University, St. Petersburg, Russia.,Center of Nanoheterostructures Physics, Ioffe Institute, Russian Academy of Sciences, St. Petersburg, Russia
| | - Ivan V Grishchuk
- Higher Engineering Physics School of the Institute of Physics, Nanotechnology and Telecommunications, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia
| | - Elena I Sakhenberg
- Laboratory of Cell Protection Mechanisms, Institute of Cytology, Russian Academy of Sciences, St. Petersburg, Russia
| | - Elena V Polishchuk
- International Research Center of Functional Materials and Devices of Optoelectronics, ITMO University, St. Petersburg, Russia.,Telethon Institute of Genetics and Medicine, Pozzuoli, Naples, Italy
| | - Pavel N Brunkov
- International Research Center of Functional Materials and Devices of Optoelectronics, ITMO University, St. Petersburg, Russia.,Center of Nanoheterostructures Physics, Ioffe Institute, Russian Academy of Sciences, St. Petersburg, Russia
| | - Alexey E Romanov
- International Research Center of Functional Materials and Devices of Optoelectronics, ITMO University, St. Petersburg, Russia.,Center of Nanoheterostructures Physics, Ioffe Institute, Russian Academy of Sciences, St. Petersburg, Russia
| | - Ludmila V Puchkova
- International Research Center of Functional Materials and Devices of Optoelectronics, ITMO University, St. Petersburg, Russia.,Department of Molecular Genetics, Research Institute of Experimental Medicine, St. Petersburg, Russia.,Higher Engineering Physics School of the Institute of Physics, Nanotechnology and Telecommunications, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia
| | - Ekaterina Yu Ilyechova
- International Research Center of Functional Materials and Devices of Optoelectronics, ITMO University, St. Petersburg, Russia.,Department of Molecular Genetics, Research Institute of Experimental Medicine, St. Petersburg, Russia
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13
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Summers KL, Dolgova NV, Gagnon KB, Sopasis GJ, James AK, Lai B, Sylvain NJ, Harris HH, Nichol HK, George GN, Pickering IJ. PBT2 acts through a different mechanism of action than other 8-hydroxyquinolines: an X-ray fluorescence imaging study. Metallomics 2020; 12:1979-1994. [PMID: 33169753 DOI: 10.1039/d0mt00222d] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
8-Hydroxyquinolines (8HQs) comprise a family of metal-binding compounds that have been used or tested for use in numerous medicinal applications, including as treatments for bacterial infection, Alzheimer's disease, and cancer. Two key 8HQs, CQ (5-chloro-7-iodo-8-hydroxyquinoline) and PBT2 (2-(dimethylamino)methyl-5,7-dichloro-8-hydroxyquinoline), have drawn considerable interest and have been the focus of many studies investigating their in vivo properties. These drugs have been described as copper and zinc ionophores because they do not cause metal depletion, as would be expected for a chelation mechanism, but rather cellular accumulation of these ions. In studies of their anti-cancer properties, CQ has been proposed to elicit toxic intracellular copper accumulation and to trigger apoptotic cancer cell death through several possible pathways. In this study we used synchrotron X-ray fluorescence imaging, in combination with biochemical assays and light microscopy, to investigate 8HQ-induced alterations to metal ion homeostasis, as well as cytotoxicity and cell death. We used the bromine fluorescence from a bromine labelled CQ congener (5,7-dibromo-8-hydroxyquinoline; B2Q) to trace the intracellular localization of B2Q following treatment and found that B2Q crosses the cell membrane. We also found that 8HQ co-treatment with Cu(ii) results in significantly increased intracellular copper and significant cytotoxicity compared with 8HQ treatments alone. PBT2 was found to be more cytotoxic, but a weaker Cu(ii) ionophore than other 8HQs. Moreover, treatment of cells with copper in the presence of CQ or B2Q resulted in copper accumulation in the nuclei, while PBT2-guided copper was distributed near to the cell membrane. These results suggest that PBT2 may be acting through a different mechanism than that of other 8HQs to cause the observed cytotoxicity.
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Affiliation(s)
- Kelly L Summers
- Molecular and Environmental Sciences Group, Department of Geological Sciences, College of Arts and Science, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada.
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14
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Maiti BK, Govil N, Kundu T, Moura JJ. 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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15
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Stefaniak E, Pushie MJ, Vaerewyck C, Corcelli D, Griggs C, Lewis W, Kelley E, Maloney N, Sendzik M, Bal W, Haas KL. Exploration of the Potential Role for Aβ in Delivery of Extracellular Copper to Ctr1. Inorg Chem 2020; 59:16952-16966. [PMID: 33211469 DOI: 10.1021/acs.inorgchem.0c02100] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Amyloid beta (Aβ) peptides are notorious for their involvement in Alzheimer's disease (AD), by virtue of their propensity to aggregate to form oligomers, fibrils, and eventually plaques in the brain. Nevertheless, they appear to be essential for correct neurophysiology on the synaptic level and may have additional functions including antimicrobial activity, sealing the blood-brain barrier, promotion of recovery from brain injury, and even tumor suppression. Aβ peptides are also avid copper chelators, and coincidentally copper is significantly dysregulated in the AD brain. Copper (Cu) is released in significant amounts during calcium signaling at the synaptic membrane. Aβ peptides may have a role in maintaining synaptic Cu homeostasis, including as a scavenger for redox-active Cu and as a chaperone for clearing Cu from the synaptic cleft. Here, we employed the Aβ1-16 and Aβ4-16 peptides as well-established non-aggregating models of major Aβ species in healthy and AD brains, and the Ctr1-14 peptide as a model for the extracellular domain of the human cellular copper transporter protein (Ctr1). With these model peptides and a number of spectroscopic techniques, we investigated whether the Cu complexes of Aβ peptides could provide Ctr1 with either Cu(II) or Cu(I). We found that Aβ1-16 fully and rapidly delivered Cu(II) to Ctr1-14 along the affinity gradient. Such delivery was only partial for the Aβ4-16/Ctr1-14 pair, in agreement with the higher complex stability for the former peptide. Moreover, the reaction was very slow and took ca. 40 h to reach equilibrium under the given experimental conditions. In either case of Cu(II) exchange, no intermediate (ternary) species were present in detectable amounts. In contrast, both Aβ species released Cu(I) to Ctr1-14 rapidly and in a quantitative fashion, but ternary intermediate species were detected in the analysis of XAS data. The results presented here are the first direct evidence of a Cu(I) and Cu(II) transfer between the human Ctr1 and Aβ model peptides. These results are discussed in terms of the fundamental difference between the peptides' Cu(II) complexes (pleiotropic ensemble of open structures of Aβ1-16 vs the rigid closed-ring system of amino-terminal Cu/Ni binding Aβ4-16) and the similarity of their Cu(I) complexes (both anchored at the tandem His13/His14, bis-His motif). These results indicate that Cu(I) may be more feasible than Cu(II) as the cargo for copper clearance from the synaptic cleft by Aβ peptides and its delivery to Ctr1. The arguments in favor of Cu(I) include the fact that cellular Cu export and uptake proteins (ATPase7A/B and Ctr1, respectively) specifically transport Cu(I), the abundance of extracellular ascorbate reducing agent in the brain, and evidence of a potential associative (hand-off) mechanism of Cu(I) transfer that may mirror the mechanisms of intracellular Cu chaperone proteins.
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Affiliation(s)
- Ewelina Stefaniak
- Department of Chemistry and Physics, Saint Mary's College, Notre Dame, Indiana 46556, United States.,Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
| | - M Jake Pushie
- Department of Surgery, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E5, Canada
| | - Catherine Vaerewyck
- Department of Chemistry and Physics, Saint Mary's College, Notre Dame, Indiana 46556, United States
| | - David Corcelli
- Department of Chemistry and Physics, Saint Mary's College, Notre Dame, Indiana 46556, United States
| | - Chloe Griggs
- Department of Chemistry and Physics, Saint Mary's College, Notre Dame, Indiana 46556, United States
| | - Whitney Lewis
- Department of Chemistry and Physics, Saint Mary's College, Notre Dame, Indiana 46556, United States
| | - Emma Kelley
- Department of Chemistry and Physics, Saint Mary's College, Notre Dame, Indiana 46556, United States
| | - Noreen Maloney
- Department of Chemistry and Physics, Saint Mary's College, Notre Dame, Indiana 46556, United States
| | - Madison Sendzik
- Department of Chemistry and Physics, Saint Mary's College, Notre Dame, Indiana 46556, United States
| | - Wojciech Bal
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland
| | - Kathryn L Haas
- Department of Chemistry and Physics, Saint Mary's College, Notre Dame, Indiana 46556, United States
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16
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A combined molecular dynamics and quantum mechanics study on the interaction of Fe3+ and human serum albumin relevant to iron overload disease. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113933] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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17
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Nunes P, Correia I, Marques F, Matos AP, Dos Santos MMC, Azevedo CG, Capelo JL, Santos HM, Gama S, Pinheiro T, Cavaco I, Pessoa JC. Copper Complexes with 1,10-Phenanthroline Derivatives: Underlying Factors Affecting Their Cytotoxicity. Inorg Chem 2020; 59:9116-9134. [PMID: 32578983 DOI: 10.1021/acs.inorgchem.0c00925] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The interpretation of in vitro cytotoxicity data of Cu(II)-1,10-phenanthroline (phen) complexes normally does not take into account the speciation that complexes undergo in cell incubation media and its implications in cellular uptake and mechanisms of action. We synthesize and test the activity of several distinct Cu(II)-phen compounds; up to 24 h of incubation, the cytotoxic activity differs for the Cu complexes and the corresponding free ligands, but for longer incubation times (e.g., 72 h), all compounds display similar activity. Combining the use of several spectroscopic, spectrometric, and electrochemical techniques, the speciation of Cu-phen compounds in cell incubation media is evaluated, indicating that the originally added complex almost totally decomposed and that Cu(II) and phen are mainly bound to bovine serum albumin. Several methods are used to disclose relationships between structure, activity, speciation in incubation media, cellular uptake, distribution of Cu in cells, and cytotoxicity. Contrary to what is reported in most studies, we conclude that interaction with cell components and cell death involves the separate action of Cu ions and phen molecules, not [Cu(phen)n] species. This conclusion should similarly apply to many other Cu-ligand systems reported to date.
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Affiliation(s)
- Patrique Nunes
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Isabel Correia
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Fernanda Marques
- Centro de Ciências e Tecnologias Nucleares and Departamento de Ciências e Engenharia Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066 Bobadela LRS, Portugal
| | - António Pedro Matos
- Centro de Investigação Interdisciplinar Egas Moniz, Campus Universitário, Quinta da Granja, Monte de Caparica, 2829-511 Caparica, Portugal
| | - Margarida M C Dos Santos
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Cristina G Azevedo
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av Rovisco Pais, 1049-001 Lisboa, Portugal
| | - José-Luis Capelo
- LAVQ, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.,PROTEOMASS Scientific Society, Madan Park, Rua dos Inventores, 2825-152 Caparica, Portugal
| | - Hugo M Santos
- LAVQ, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.,PROTEOMASS Scientific Society, Madan Park, Rua dos Inventores, 2825-152 Caparica, Portugal
| | - Sofia Gama
- Department of Analytical Chemistry, Faculty of Chemistry, University of Białystok, ul. Ciołkowskiego 1K, 15-245 Białystok, Poland
| | - Teresa Pinheiro
- Institute for Bioengineering and Biosciences and Departamento de Engenharia e Ciências Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
| | - Isabel Cavaco
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av Rovisco Pais, 1049-001 Lisboa, Portugal.,Departamento de Química e Farmácia, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
| | - João Costa Pessoa
- Centro de Química Estrutural and Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av Rovisco Pais, 1049-001 Lisboa, Portugal
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18
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Marciniak A, Witak W, Pieniężna A, Brasuń J. The Binding Ability of a Bicyclic Somatostatin Analogue Towards Cu(II) Ions. Chem Biodivers 2020; 17:e2000307. [PMID: 32470208 DOI: 10.1002/cbdv.202000307] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 05/29/2020] [Indexed: 12/23/2022]
Abstract
Somatostatin (SST) analogues have aroused the interest of scientists for years. This group of compounds is used in the diagnosis and treatment of neuroendocrine tumors. However, new molecules useful as radiopharmaceuticals in targeted therapy are still searched for. Bicyclic peptides seem to be very interesting in this context. These molecules are associated with beneficial properties. In this work, we present studies on the binding ability of the bicyclic analogue of somatostatin toward Cu(II) ions which could potentially be a chelator for copper radionuclides. The research is focused on the analysis of Cu(II) interactions with the metal binding cycle of the ligand and the influence of the receptor binding site on the coordination process. This is a novelty in comparison to the SST analogues used in medicine, where a metal ion is coordinated by a chelator and connected with a bioactive molecule by the linker. In this work, we present the first coordination study for a bicyclic ligand. The obtained results showed that the complexes with only imidazole donors are characterized by significantly higher stability in comparison to the other peptides.
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Affiliation(s)
- Aleksandra Marciniak
- Department of Inorganic Chemistry, Wroclaw Medical University, Borowska 211 A, 50-556, Wroclaw, Poland
| | - Weronika Witak
- Department of Inorganic Chemistry, Wroclaw Medical University, Borowska 211 A, 50-556, Wroclaw, Poland
| | - Aleksandra Pieniężna
- Department of Inorganic Chemistry, Wroclaw Medical University, Borowska 211 A, 50-556, Wroclaw, Poland
| | - Justyna Brasuń
- Department of Inorganic Chemistry, Wroclaw Medical University, Borowska 211 A, 50-556, Wroclaw, Poland
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19
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Alshammari N, Platts JA. Theoretical study of copper binding to GHK peptide. Comput Biol Chem 2020; 86:107265. [PMID: 32371360 DOI: 10.1016/j.compbiolchem.2020.107265] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 04/07/2020] [Accepted: 04/09/2020] [Indexed: 11/20/2022]
Abstract
We report ligand field molecular mechanics, density functional theory and semi-empirical studies on the binding of Cu(II) to GlyHisLys (GHK) peptide. Following exhaustive conformational searching using molecular mechanics, we show that relative energy and geometry of conformations are in good agreement between GFN2-xTB semi-empirical and B3LYP-D DFT levels. Conventional molecular dynamics simulation of Cu-GHK shows the stability of the copper-peptide binding over 100 ps trajectory. Four equatorial bonds in 3N1O coordination remain stable throughout simulation, while a fifth in apical position from C-terminal carboxylate is more fluxional. We also show that the automated conformer and rotamer search algorithm CREST is able to correctly predict the metal binding position from a starting point consisting of separated peptide, copper and water.
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Affiliation(s)
- Nadiyah Alshammari
- School of Chemistry, Cardiff University, Park Place, Cardiff CF10 3AT, UK
| | - James A Platts
- School of Chemistry, Cardiff University, Park Place, Cardiff CF10 3AT, UK.
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20
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Human Antimicrobial Peptide Hepcidin 25-Induced Apoptosis in Candida albicans. Microorganisms 2020; 8:microorganisms8040585. [PMID: 32316661 PMCID: PMC7232333 DOI: 10.3390/microorganisms8040585] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 04/13/2020] [Accepted: 04/15/2020] [Indexed: 12/28/2022] Open
Abstract
Hepcidin 25 (hep 25) is a cysteine-rich 25-amino acid antimicrobial peptide containing the amino-terminal Cu(II)/Ni(II)-binding (ATCUN) motif. Upon metal binding, the ATCUN motif is known to be involved in the generation of reactive oxygen species (ROS), especially hydrogen peroxide and hydroxyl radicals, which act against different bacterial species. However, the antifungal activity and its correlation to the Cu(II)-ATCUN complex of Hep 25 are still poorly understood. Here, we found that ROS accumulation plays an important role in the fungicidal activity of hep 25 against Candida albicans. In addition, Annexin V-FITC staining and TUNEL assay results provide clues about the apoptosis induced by hep 25. Moreover, hep 25 also increases the generation of ROS, possibly because of copper binding to the ATCUN motif, which is relevant to its activity against C. albicans. Finally, the C. albicans killing action of hep 25 is an energy- and temperature-dependent process that does not involve targeting the membrane. Taken together, our results provide new insights into the mechanisms of hep 25 against C. albicans cells and the potential use of hep 25 and its derivatives as novel antifungal agents.
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21
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Abstract
It has been reported that Cu(II) ions in human blood are bound mainly to serum albumin (HSA), ceruloplasmin (CP), alpha-2-macroglobulin (α2M) and His, however, data for α2M are very limited and the thermodynamics and kinetics of the copper distribution are not known. We have applied a new LC-ICP MS-based approach for direct determination of Cu(II)-binding affinities of HSA, CP and α2M in the presence of competing Cu(II)-binding reference ligands including His. The ligands affected both the rate of metal release from Cu•HSA complex and the value of KD. Slow release and KD = 0.90 pM was observed with nitrilotriacetic acid (NTA), whereas His showed fast release and substantially lower KD = 34.7 fM (50 mM HEPES, 50 mM NaCl, pH 7.4), which was explained with formation of ternary His•Cu•HSA complex. High mM concentrations of EDTA were not able to elicit metal release from metallated CP at pH 7.4 and therefore it was impossible to determine the KD value for CP. In contrast to earlier inconclusive evidence, we show that α2M does not bind Cu(II) ions. In the human blood serum ~75% of Cu(II) ions are in a nonexchangeable manner bound to CP and the rest exchangeable copper is in an equilibrium between HSA (~25%) and Cu(II)-His-Xaa ternary complexes (~0.2%).
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22
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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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23
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Bossak‐Ahmad K, Frączyk T, Bal W, Drew SC. The Sub‐picomolar Cu2+Dissociation Constant of Human Serum Albumin. Chembiochem 2019; 21:331-334. [DOI: 10.1002/cbic.201900435] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Indexed: 12/22/2022]
Affiliation(s)
- Karolina Bossak‐Ahmad
- Institute of Biochemistry and BiophysicsPolish Academy of Sciences Pawińskiego 5a 02-106 Warsaw Poland
| | - Tomasz Frączyk
- Institute of Biochemistry and BiophysicsPolish Academy of Sciences Pawińskiego 5a 02-106 Warsaw Poland
- Department of Immunology, Transplantology and Internal MedicineMedical University of Warsaw Nowogrodzka 59 02-006 Warsaw Poland
| | - Wojciech Bal
- Institute of Biochemistry and BiophysicsPolish Academy of Sciences Pawińskiego 5a 02-106 Warsaw Poland
| | - Simon C. Drew
- Institute of Biochemistry and BiophysicsPolish Academy of Sciences Pawińskiego 5a 02-106 Warsaw Poland
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24
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Stefaniak E, Płonka D, Drew SC, Bossak-Ahmad K, Haas KL, Pushie MJ, Faller P, Wezynfeld NE, Bal W. The N-terminal 14-mer model peptide of human Ctr1 can collect Cu(ii) from albumin. Implications for copper uptake by Ctr1. Metallomics 2019; 10:1723-1727. [PMID: 30489586 DOI: 10.1039/c8mt00274f] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Human cells acquire copper primarily via the copper transporter 1 protein, hCtr1. We demonstrate that at extracellular pH 7.4 CuII is bound to the model peptide hCtr11-14via an ATCUN motif and such complexes are strong enough to collect CuII from albumin, supporting the potential physiological role of CuII binding to hCtr1.
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Affiliation(s)
- Ewelina Stefaniak
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego 5a, 02-106 Warsaw, Poland.
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25
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Paranawithana NN, Martins AF, Clavijo Jordan V, Zhao P, Chirayil S, Meloni G, Sherry AD. A Responsive Magnetic Resonance Imaging Contrast Agent for Detection of Excess Copper(II) in the Liver In Vivo. J Am Chem Soc 2019; 141:11009-11018. [PMID: 31268706 PMCID: PMC9991518 DOI: 10.1021/jacs.8b13493] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The design, synthesis, and properties of a new gadolinium-based copper-responsive magnetic resonance imaging (MRI) contrast agent is presented. The sensor (GdL1) has high selectivity for copper ions and exhibits a 43% increase in r1 relaxivity (20 MHz) upon binding to 1 equiv of Cu2+ in aqueous buffer. Interestingly, in the presence of physiological levels of human serum albumin (HSA), the r1 relaxivity is amplified further up to 270%. Additional spectroscopic and X-ray absorption spectroscopy (XAS) studies show that Cu2+ is coordinated by two carboxylic acid groups and the single amine group on an appended side chain of GdL1 and forms a ternary complex with HSA (GdL1-Cu2+-HSA). T1-weighted in vivo imaging demonstrates that GdL1 can detect basal, endogenous labile copper(II) ions in living mice. This offers a unique opportunity to explore the role of copper ions in the development and progression of neurological diseases such as Wilson's disease.
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Affiliation(s)
- Namini N Paranawithana
- Department of Chemistry and Biochemistry , University of Texas at Dallas , Richardson , Texas , United States
| | - Andre F Martins
- Department of Chemistry and Biochemistry , University of Texas at Dallas , Richardson , Texas , United States
| | - Veronica Clavijo Jordan
- Advanced Imaging Research Center , University of Texas Southwestern Medical Center , Dallas , Texas , United States
| | - Piyu Zhao
- Department of Chemistry and Biochemistry , University of Texas at Dallas , Richardson , Texas , United States
| | - Sara Chirayil
- Advanced Imaging Research Center , University of Texas Southwestern Medical Center , Dallas , Texas , United States
| | - Gabriele Meloni
- Department of Chemistry and Biochemistry , University of Texas at Dallas , Richardson , Texas , United States
| | - A Dean Sherry
- Department of Chemistry and Biochemistry , University of Texas at Dallas , Richardson , Texas , United States.,Advanced Imaging Research Center , University of Texas Southwestern Medical Center , Dallas , Texas , United States
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26
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Stefaniak E, Bal W. Cu II Binding Properties of N-Truncated Aβ Peptides: In Search of Biological Function. Inorg Chem 2019; 58:13561-13577. [PMID: 31304745 DOI: 10.1021/acs.inorgchem.9b01399] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
As life expectancy increases, the number of people affected by progressive and irreversible dementia, Alzheimer's Disease (AD), is predicted to grow. No drug designs seem to be working in humans, apparently because the origins of AD have not been identified. Invoking amyloid cascade, metal ions, and ROS production hypothesis of AD, herein we share our point of view on Cu(II) binding properties of Aβ4-x, the most prevalent N-truncated Aβ peptide, currently known as the main constituent of amyloid plaques. The capability of Aβ4-x to rapidly take over copper from previously tested Aβ1-x peptides and form highly stable complexes, redox unreactive and resistant to copper exchange reactions, prompted us to propose physiological roles for these peptides. We discuss the new findings on the reactivity of Cu(II)Aβ4-x with coexisting biomolecules in the context of synaptic cleft; we suggest that the role of Aβ4-x peptides is to quench Cu(II) toxicity in the brain and maintain neurotransmission.
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Affiliation(s)
- Ewelina Stefaniak
- 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
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27
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Nemashkalova EL, Permyakov EA, Uversky VN, Permyakov SE, Litus EA. Effect of Cu 2+ and Zn 2+ ions on human serum albumin interaction with plasma unsaturated fatty acids. Int J Biol Macromol 2019; 131:505-509. [PMID: 30880051 DOI: 10.1016/j.ijbiomac.2019.03.085] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 03/11/2019] [Accepted: 03/13/2019] [Indexed: 01/15/2023]
Abstract
Human serum albumin (HSA) serves as a depot and carrier of multiple unrelated ligands including several participants of the pathogenesis of Alzheimer's disease (AD), such as amyloid β peptide (Aβ), Zn2+/Cu2+ ions, docosahexaenoic (DHA), linoleic (LA), and oleic (OA) acids. To explore the interplay between HSA interaction with Zn2+/Cu2+ and the plasma unsaturated fatty acids (DHA, LA, OA, and arachidonic acid (ArA)), we have studied the metal dependence of the fatty acid (FA) binding capacity of HSA (nmax) and structural consequences of the HSA-FA interactions. HSA loading with Zn2+ decreases nmax value by 0.3-1.5, while its saturation with Cu2+ causes the FA-dependent nmax changes by up to 0.9. The Cu2+-induced decline in nmax value for DHA is due to conformational rearrangements in HSA molecule. In other cases, the changes in nmax are attributed to steric hindarance/facilitation of the HSA-FA interaction because of the protein multimerization/monomerization, as confirmed by chemical crosslinking. The surface hydrophobicity of HSA is Cu2+-, Zn2+-, and FA-dependent and decreases upon the FA binding, according to bis-ANS fluorescence data. Overall, Zn2+ or Cu2+ binding selectively affect HSA interaction with the FAs studied, in part due to changes in quaternary structure of the protein.
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Affiliation(s)
- Ekaterina L Nemashkalova
- Institute for Biological Instrumentation of the Russian Academy of Sciences, Federal Research Center 'Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences', Institutskaya str., 7, Pushchino, Moscow region 142290, Russia
| | - Eugene A Permyakov
- Institute for Biological Instrumentation of the Russian Academy of Sciences, Federal Research Center 'Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences', Institutskaya str., 7, Pushchino, Moscow region 142290, Russia
| | - Vladimir N Uversky
- Institute for Biological Instrumentation of the Russian Academy of Sciences, Federal Research Center 'Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences', Institutskaya str., 7, Pushchino, Moscow region 142290, Russia; Department of Molecular Medicine and USF Health Byrd Alzheimer's Research Institute, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
| | - Sergei E Permyakov
- Institute for Biological Instrumentation of the Russian Academy of Sciences, Federal Research Center 'Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences', Institutskaya str., 7, Pushchino, Moscow region 142290, Russia
| | - Ekaterina A Litus
- Institute for Biological Instrumentation of the Russian Academy of Sciences, Federal Research Center 'Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences', Institutskaya str., 7, Pushchino, Moscow region 142290, Russia.
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28
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Wezynfeld NE, Vileno B, Faller P. Cu(II) Binding to the N-Terminal Model Peptide of the Human Ctr2 Transporter at Lysosomal and Extracellular pH. Inorg Chem 2019; 58:7488-7498. [PMID: 31083932 DOI: 10.1021/acs.inorgchem.9b00711] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
It was shown that His3 of human copper transporter 1 (hCtr1) prompts the ATCUN-like Cu(II) coordination for model peptides of the hCtr1 N-terminus. Its high Cu(II) affinity is a potential driving force for the transfer of Cu(II) from extracellular Cu(II) carriers to hCtr1. Having a sequence similar to that of hCtr1, hCtr2 has been proposed as another human copper transporter. However, the N-terminal domain of hCtr2 is much shorter than that of hCtr1, with different copper binding motifs at its N-terminus. Employing a model peptide of the hCtr2 N-terminus, MAMHF-am, we demonstrated that His4 provides a unique pattern of Cu(II) complexes, involving Met sulfurs in their Cu(II) coordination sphere. The affinity of Cu(II) for MAMHF-am is a few orders of magnitude lower than that reported for the hCtr1 model peptides at the extracellular pH of 7.4, suggesting a maximal complementary role of Cu(II) binding to hCtr2 in the import of copper from the extracellular space to the cytoplasm. On the other hand, the ability of the hCtr2 model peptide to capture Cu(II) from amino acids and short peptides (potential degradation products of proteins) at pH 5.0 and the known predominant lysosomal localization of hCtr2 support an important potential role of the Cu(II)-hCtr2 interaction in the recovery of copper from lysosomes.
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Affiliation(s)
- Nina E Wezynfeld
- Institut de Chimie, UMR 7177 , CNRS-Université de Strasbourg , 4 rue Blaise Pascal , 67000 Strasbourg , France.,Institute of Biochemistry and Biophysics , Polish Academy of Sciences , Pawińskiego 5a , 02-106 Warsaw , Poland
| | - Bertrand Vileno
- Institut de Chimie, UMR 7177 , CNRS-Université de Strasbourg , 4 rue Blaise Pascal , 67000 Strasbourg , France.,French EPR Federation of Research (REseau NAtional de Rpe interDisciplinaire (RENARD) Fédération IR-RPE CNRS #3443) , 67081 Strasbourg , France
| | - Peter Faller
- Institut de Chimie, UMR 7177 , CNRS-Université de Strasbourg , 4 rue Blaise Pascal , 67000 Strasbourg , France
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29
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Al-Harthi S, Lachowicz JI, Nowakowski ME, Jaremko M, Jaremko Ł. Towards the functional high-resolution coordination chemistry of blood plasma human serum albumin. J Inorg Biochem 2019; 198:110716. [PMID: 31153112 DOI: 10.1016/j.jinorgbio.2019.110716] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 05/07/2019] [Accepted: 05/13/2019] [Indexed: 12/11/2022]
Abstract
Human serum albumin (HSA) is a monomeric, globular, multi-carrier and the most abundant protein in the blood. HSA displays multiple ligand binding sites with extraordinary binding capacity for a wide range of ions and molecules. For decades, HSA's ability to bind to various ligands has led many scientists to study its physiological properties and protein structure; indeed, a better understanding of HSA-ligand interactions in human blood, at the atomic level, will likely foster the development of more potent, and overall more performant, diagnostic and therapeutic tools against serious human disorders such as diabetes, cardiovascular disorders, and cancer. Here, we present a concise overview of the current knowledge of HSA's structural characteristics, and its coordination chemistry with transition metal ions, within the scope and limitations of current techniques and biophysical methods to reach atomic resolution in solution and in blood serum. We also highlight the overwhelming need of a detailed atomistic understanding of HSA dynamic structures and interactions that are transient, weak, multi-site and multi-step, and allosterically affected by each other. Considering the fact that HSA is a current clinical tool for drug delivery systems and a potential contender as molecular cargo and nano-vehicle used in biophysical, clinical and industrial fields, we underline the emerging need for novel approaches to target the dynamic functional coordination chemistry of the human blood serum albumin in solution, at the atomic level.
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Affiliation(s)
- Samah Al-Harthi
- King Abdullah University of Science and Technology (KAUST), Biological and Environmental Science and Engineering Division (BESE), 23955-6900 Thuwal, Saudi Arabia
| | - Joanna Izabela Lachowicz
- Dipartimento di Scienze Chimiche e Geologiche, Università di Cagliari, Cittadella Universitaria, I-09042 Monserrato, Cagliari, Italy
| | - Michal Eligiusz Nowakowski
- King Abdullah University of Science and Technology (KAUST), Biological and Environmental Science and Engineering Division (BESE), 23955-6900 Thuwal, Saudi Arabia; Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089 Warszawa, Poland
| | - Mariusz Jaremko
- King Abdullah University of Science and Technology (KAUST), Biological and Environmental Science and Engineering Division (BESE), 23955-6900 Thuwal, Saudi Arabia
| | - Łukasz Jaremko
- King Abdullah University of Science and Technology (KAUST), Biological and Environmental Science and Engineering Division (BESE), 23955-6900 Thuwal, Saudi Arabia.
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30
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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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31
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McInnes LE, Noor A, Kysenius K, Cullinane C, Roselt P, McLean CA, Chiu FCK, Powell AK, Crouch PJ, White JM, Donnelly PS. Potential Diagnostic Imaging of Alzheimer's Disease with Copper-64 Complexes That Bind to Amyloid-β Plaques. Inorg Chem 2019; 58:3382-3395. [PMID: 30785268 DOI: 10.1021/acs.inorgchem.8b03466] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Amyloid-β plaques, consisting of aggregated amyloid-β peptides, are one of the pathological hallmarks of Alzheimer's disease. Copper complexes formed using positron-emitting copper radionuclides that cross the blood-brain barrier and bind to specific molecular targets offer the possibility of noninvasive diagnostic imaging using positron emission tomography. New thiosemicarbazone-pyridylhydrazone based ligands that incorporate pyridyl-benzofuran functional groups designed to bind amyloid-β plaques have been synthesized. The ligands form stable complexes with copper(II) ( Kd = 10-18 M) and can be radiolabeled with copper-64 at room temperature. Subtle changes to the periphery of the ligand backbone alter the metabolic stability of the complexes in mouse and human liver microsomes, and influenced the ability of the complexes to cross the blood-brain barrier in mice. A lead complex was selected based on possessing the best metabolic stability and brain uptake in mice. Synthesis of this lead complex with isotopically enriched copper-65 allowed us to show that the complex bound to amyloid-β plaques present in post-mortem human brain tissue using laser ablation-inductively coupled plasma-mass spectrometry. This work provides insight into strategies to target metal complexes to amyloid-β plaques, and how small modifications to ligands can dramatically alter the metabolic stability of metal complexes as well as their ability to cross the blood-brain barrier.
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Affiliation(s)
| | | | | | - Carleen Cullinane
- Research Division , Peter MacCallum Cancer Centre , Melbourne , Victoria , Australia , 3000.,The Sir Peter MacCallum Department of Oncology , The University of Melbourne , Parkville , Victoria , Australia , 3000
| | - Peter Roselt
- Research Division , Peter MacCallum Cancer Centre , Melbourne , Victoria , Australia , 3000
| | - Catriona A McLean
- Department of Anatomical Pathology , The Alfred Hospital , Melbourne , Victoria , Australia , 3181
| | - Francis C K Chiu
- Centre for Drug Candidate Optimisation, Monash Institute of Pharmaceutical Sciences , Monash University , Parkville , Victoria , Australia , 3052
| | - Andrew K Powell
- Centre for Drug Candidate Optimisation, Monash Institute of Pharmaceutical Sciences , Monash University , Parkville , Victoria , Australia , 3052
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32
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Dhandapani G, Howard A, Truong TV, Baiju TV, Kesselman E, Friedman N, Wachtel E, Sheves M, Danino D, Namboothiri INN, Patchornik G. A general platform for antibody purification utilizing engineered-micelles. MAbs 2019; 11:583-592. [PMID: 30618334 DOI: 10.1080/19420862.2019.1565749] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
We introduce a new concept and potentially general platform for antibody (Ab) purification that does not rely on chromatography or specific ligands (e.g., Protein A); rather, it makes use of detergent aggregates capable of efficiently capturing Ab while rejecting hydrophilic impurities. Captured Ab are then extracted from the aggregates in pure form without co-extraction of hydrophobic impurities or aggregate dissolution. The aggregates studied consist of conjugated "Engineered-micelles" built from the nonionic detergent, Tween-20; bathophenanthroline, a hydrophobic metal chelator, and Fe2+ions. When tested in serum-free media with or without bovine serum albumin as additive, human or mouse IgGs were recovered with good overall yields (70-80%, by densitometry). Extraction of IgGs with 7 different buffers at pH 3.8 sheds light on possible interactions between captured Ab and their surrounding detergent matrix that lead to purity very similar to that obtained via Protein A or Protein G resins. Extracted Ab preserve their secondary structure, specificity and monomeric character as determined by circular dichroism, enzyme-linked immunosorbent assay and dynamic light scattering, respectively.
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Affiliation(s)
| | - Assaf Howard
- a Department of Chemical Sciences , Ariel University , Ariel , Israel
| | - Thien Van Truong
- a Department of Chemical Sciences , Ariel University , Ariel , Israel
| | - Thekke V Baiju
- b Department of Chemistry , Indian Institute of Technology Bombay , Powai , India
| | - Ellina Kesselman
- c Faculty of Biotechnology and Food Engineering , Technion , Haifa , Israel
| | - Noga Friedman
- d Faculty of Chemistry , Weizmann Institute of Science , Rehovot , Israel
| | - Ellen Wachtel
- d Faculty of Chemistry , Weizmann Institute of Science , Rehovot , Israel
| | - Mordechai Sheves
- d Faculty of Chemistry , Weizmann Institute of Science , Rehovot , Israel
| | - Dganit Danino
- c Faculty of Biotechnology and Food Engineering , Technion , Haifa , Israel
| | | | - Guy Patchornik
- a Department of Chemical Sciences , Ariel University , Ariel , Israel
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33
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Falcone E, Sour A, Lebrun V, Ulrich G, Raibaut L, Faller P. Reversible turn-on fluorescent Cu(ii) sensors: rather dream than reality? Dalton Trans 2019; 48:14233-14237. [DOI: 10.1039/c9dt02864a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Reversible turn-on fluorescent Cu(ii) sensors are of high interest to understand copper metabolism in biology and medicine. However, they are intrinsically difficult to build, and careful studies are needed to exclude Cu(ii)-induced sensor oxidation.
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Affiliation(s)
- Enrico Falcone
- Institut de Chimie
- UMR 7177
- CNRS-Université de Strasbourg
- Strasbourg
- France
| | - Angélique Sour
- Institut de Chimie
- UMR 7177
- CNRS-Université de Strasbourg
- Strasbourg
- France
| | - Vincent Lebrun
- Institut de Chimie
- UMR 7177
- CNRS-Université de Strasbourg
- Strasbourg
- France
| | - Gilles Ulrich
- ICPEES
- UMR 7515
- CNRS-Université de Strasbourg
- ECPM
- Strasbourg
| | - Laurent Raibaut
- Institut de Chimie
- UMR 7177
- CNRS-Université de Strasbourg
- Strasbourg
- France
| | - Peter Faller
- Institut de Chimie
- UMR 7177
- CNRS-Université de Strasbourg
- Strasbourg
- France
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34
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Adam N, Adam C, Keskitalo M, Pfeuffer-Rooschüz J, Panak PJ. Interaction of Cm(III) with human serum albumin studied by time-resolved laser fluorescence spectroscopy and NMR. J Inorg Biochem 2018; 192:45-51. [PMID: 30594865 DOI: 10.1016/j.jinorgbio.2018.12.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 11/16/2018] [Accepted: 12/15/2018] [Indexed: 10/27/2022]
Abstract
The complexation of Cm(III) with human serum albumin (HSA) was investigated using time-resolved laser fluorescence spectroscopy (TRLFS). The Cm(III) HSA species is dominating the speciation between pH 7.0 and 9.3. The first coordination sphere is composed by three to four H2O molecules and five to six coordinating ligands from the protein. For the complex formation at pH 8.0 a conditional stability constant of logK = 6.16 ± 0.50 was determined. Furthermore, information on the Cm(III) HSA binding site were obtained. With increasing Cu(II) concentration the Cm(III) HSA complexation is suppressed whereas the addition of Zn(II) has no effect. This points to the complexation of Cm(III) at the N-terminal binding site (NTS) which is the primary Cu(II) binding site. NMR experiments with Cu(II), Eu(III) and Am(III) HSA show a decrease of the peak assigned to the His C2 proton of His 3, which is part of the NTS, with increasing metal ion concentration. This confirms the complexation of Eu(III) and Am(III) at the Cu(II) binding site NTS. The results presented in this study contribute to a better understanding of relevant biochemical reactions of incorporated actinides.
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Affiliation(s)
- Nicole Adam
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe, Germany.
| | - Christian Adam
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Markus Keskitalo
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe, Germany; Department of Chemistry - Radiochemistry, University of Helsinki, P.O. Box 55, 00014 Helsinki, Finland
| | - Jonathan Pfeuffer-Rooschüz
- University of Heidelberg, Institute of Physical Chemistry, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
| | - Petra J Panak
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe, Germany; University of Heidelberg, Institute of Physical Chemistry, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
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35
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Bossak-Ahmad K, Mital M, Płonka D, Drew SC, Bal W. Oligopeptides Generated by Neprilysin Degradation of β-Amyloid Have the Highest Cu(II) Affinity in the Whole Aβ Family. Inorg Chem 2018; 58:932-943. [PMID: 30582328 DOI: 10.1021/acs.inorgchem.8b03051] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The catabolism of β-amyloid (Aβ) is carried out by numerous endopeptidases including neprilysin, which hydrolyzes peptide bonds preceding positions 4, 10, and 12 to yield Aβ4-9 and a minor Aβ12- x species. Alternative processing of the amyloid precursor protein by β-secretase also generates the Aβ11- x species. All these peptides contain a Xxx-Yyy-His sequence, also known as an ATCUN or NTS motif, making them strong chelators of Cu(II) ions. We synthesized the corresponding peptides, Phe-Arg-His-Asp-Ser-Gly-OH (Aβ4-9), Glu-Val-His-His-Gln-Lys-am (Aβ11-16), Val-His-His-Gln-Lys-am (Aβ12-16), and pGlu-Val-His-His-Gln-Lys-am (pAβ11-16), and investigated their Cu(II) binding properties using potentiometry, and UV-vis, circular dichroism, and electron paramagnetic resonance spectroscopies. We found that the three peptides with unmodified N-termini formed square-planar Cu(II) complexes at pH 7.4 with analogous geometries but significantly varied Kd values of 6.6 fM (Aβ4-9), 9.5 fM (Aβ12-16), and 1.8 pM (Aβ11-16). Cyclization of the N-terminal Glu11 residue to the pyroglutamate species pAβ11-16 dramatically reduced the affinity (5.8 nM). The Cu(II) affinities of Aβ4-9 and Aβ12-16 are the highest among the Cu(II) complexes of Aβ peptides. Using fluorescence spectroscopy, we demonstrated that the Cu(II) exchange between the Phe-Arg-His and Val-His-His motifs is very slow, on the order of days. These results are discussed in terms of the relevance of Aβ4-9, a major Cu(II) binding Aβ fragment generated by neprilysin, as a possible Cu(II) carrier in the brain.
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Affiliation(s)
- Karolina Bossak-Ahmad
- Institute of Biochemistry and Biophysics , Polish Academy of Sciences , 02-106 Warsaw , Poland
| | - Mariusz Mital
- Institute of Biochemistry and Biophysics , Polish Academy of Sciences , 02-106 Warsaw , Poland
| | - Dawid Płonka
- Institute of Biochemistry and Biophysics , Polish Academy of Sciences , 02-106 Warsaw , Poland
| | - Simon C Drew
- 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
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36
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Penezić AZ, Aćimović JM, Pavićević ID, Jovanović VB, Takić M, Mandić LM. The interplay between copper(II), human serum albumin, fatty acids, and carbonylating agent interferes with Cys 34 thiol reactivity and copper binding. J Biol Inorg Chem 2018; 24:61-70. [PMID: 30456476 DOI: 10.1007/s00775-018-1628-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 11/13/2018] [Indexed: 12/12/2022]
Abstract
Cys34 thiol group of human serum albumin (HSA) represents major plasma antioxidant. Its reactivity is influenced by multiple factors. The influence of fatty acids (FA; saturated, mono, and poly unsaturated acids from fish oil) binding to HSA, on copper(II) binding affinity and Cys34 thiol group accessibility/reactivity, in the presence of carbonylation agent (methylglyoxal, MG) was examined. HSA-copper(II) content, thiol group reactivity, and HSA carbonylation level were monitored spectrophotometrically. Changes in HSA were followed by fluorescence spectroscopy and native PAG electrophoresis. FA/HSA molar ratio was screened by GC. Together, binding of copper(II) ions and FA to HSA increase the reactivity of Cys34 thiol group (depending on the type of FA), with constant contribution of copper(II) ions of one-third. Carbonylation of FA-HSA-Cu(II) complexes caused a decrease in the Cys34 thiol group content, accompanied by a decrease in the content of HSA-bound copper. The carbonylation level of guanidine groups was not affected by FAs and copper(II) binding. Fluorescent emission spectra of FA-HSA-Cu(II)-MG complexes showed conformational changes in HSA molecule. Although binding of fatty acids and copper ions caused a significant increase in the thiol group reactivity, Cys34 thiol from FA-HSA-Cu(II) complexes reacted with MG in smaller extent than expected, probably as a consequence of conformational changes introduced by carbonylation. Increase in the percentage of reacted-free thiol groups with MG (due to FA and copper binding) may not seem to be very significant, but it is very important in complex biological systems, where catalytic metal is present.
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Affiliation(s)
- Ana Z Penezić
- Institute for the Application of Nuclear Energy, INEP, Banatska 31b, 11000, Belgrade, Serbia.
| | - Jelena M Aćimović
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000, Belgrade, Serbia
| | - Ivan D Pavićević
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000, Belgrade, Serbia
| | - Vesna B Jovanović
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000, Belgrade, Serbia
| | - Marija Takić
- Laboratory for Nutrition and Metabolism, Institute for Medical Research, University of Belgrade, Belgrade, Serbia
| | - Ljuba M Mandić
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000, Belgrade, Serbia
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Libardo MDJ, de la Fuente-Nuñez C, Anand K, Krishnamoorthy G, Kaiser P, Pringle SC, Dietz C, Pierce S, Smith MB, Barczak A, Kaufmann SHE, Singh A, Angeles-Boza AM. Phagosomal Copper-Promoted Oxidative Attack on Intracellular Mycobacterium tuberculosis. ACS Infect Dis 2018; 4:1623-1634. [PMID: 30141623 DOI: 10.1021/acsinfecdis.8b00171] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Copper (Cu) ions are critical in controlling bacterial infections, and successful pathogens like Mycobacterium tuberculosis (Mtb) possess multiple Cu resistance mechanisms. We report, as proof of concept, that a novel Cu hypersensitivity phenotype can be generated in mycobacteria, including Mtb, through a peptide, DAB-10, that is able to form reactive oxygen species (ROS) following Cu-binding. DAB-10 induces intramycobacterial oxidative stress in a Cu-dependent manner in vitro and during infection. DAB-10 penetrates murine macrophages and encounters intracellular mycobacteria. Significant intracellular Cu-dependent protection was observed when Mtb-infected macrophages were treated with DAB-10 alongside a cell-permeable Cu chelator. Treatment with the Cu chelator reversed the intramycobacterial oxidative shift induced by DAB-10. We conclude that DAB-10 utilizes the pool of phagosomal Cu ions in the host-Mtb interface to augment the mycobactericidal activity of macrophages while simultaneously exploiting the susceptibility of Mtb to ROS. DAB-10 serves as a model with which to develop next-generation, multifunctional antimicrobials.
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Affiliation(s)
- M. Daben J. Libardo
- Department of Chemistry, University of Connecticut, 55 N. Eagleville Road, Storrs, Connecticut 06269, United States
| | - Cesar de la Fuente-Nuñez
- Synthetic Biology Group, MIT Synthetic Biology Center, Department of Biological Engineering, and Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, 21 Ames Street, Cambridge, Massachusetts 02139, United States
- Research Laboratory of Electronics, Massachusetts Institute of Technology, 50 Vassar Street, Cambridge, Massachusetts 02139, United States
- The Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02139, United States
| | - Kushi Anand
- Department of Microbiology and Cell Biology, Center for Infectious Disease Research, Indian Institute of Science, Bangalore 560012, India
| | - Gopinath Krishnamoorthy
- Department of Immunology, Max Planck Institute for Infection Biology, Virchowweg 12, Berlin 10117, Germany
| | - Peggy Kaiser
- Department of Immunology, Max Planck Institute for Infection Biology, Virchowweg 12, Berlin 10117, Germany
| | - Stephanie C. Pringle
- The Ragon Institute of Harvard, MIT, and Massachusetts General Hospital, 400 Technology Square, Cambridge, Massachusetts 02139, United States
| | - Christopher Dietz
- Department of Chemistry, University of Connecticut, 55 N. Eagleville Road, Storrs, Connecticut 06269, United States
| | - Scott Pierce
- Department of Chemistry, University of Connecticut, 55 N. Eagleville Road, Storrs, Connecticut 06269, United States
| | - Michael B. Smith
- Department of Chemistry, University of Connecticut, 55 N. Eagleville Road, Storrs, Connecticut 06269, United States
| | - Amy Barczak
- The Ragon Institute of Harvard, MIT, and Massachusetts General Hospital, 400 Technology Square, Cambridge, Massachusetts 02139, United States
- Division of Infectious Disease, Massachusetts General Hospital, 55 Fruit Street, Boston, Massachusetts 02114, United States
- Department of Medicine, Harvard Medical School, 25 Shattuck Street, Boston, Massachusetts 02115, United States
| | - Stefan H. E. Kaufmann
- Department of Immunology, Max Planck Institute for Infection Biology, Virchowweg 12, Berlin 10117, Germany
| | - Amit Singh
- Department of Microbiology and Cell Biology, Center for Infectious Disease Research, Indian Institute of Science, Bangalore 560012, India
| | - Alfredo M. Angeles-Boza
- Department of Chemistry, University of Connecticut, 55 N. Eagleville Road, Storrs, Connecticut 06269, United States
- Institute of Materials Science, University of Connecticut, 97 N. Eagleville Road, Storrs, Connecticut 06269, United States
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38
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de Paula QA, Joly JP, Selmeczi K, Fonseca DEP, Caramori GF, Farrell NP, Da Costa Ferreira AM. Binding affinity studies of 1,2,3-triazole copper(II) complexes to human serum albumin. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1495331] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Queite A. de Paula
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, Brazil
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA, USA
| | - Jean-Pierre Joly
- L2CM UMR 7053 CNRS, Université de Lorraine, Faculté des Sciences, Vandoeuvre-lès-Nancy, France
| | - Katalin Selmeczi
- L2CM UMR 7053 CNRS, Université de Lorraine, Faculté des Sciences, Vandoeuvre-lès-Nancy, France
| | - David E. P. Fonseca
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Giovanni F. Caramori
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Nicholas P. Farrell
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA, USA
| | - Ana M. Da Costa Ferreira
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, Brazil
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40
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Coverdale JPC, Katundu KGH, Sobczak AIS, Arya S, Blindauer CA, Stewart AJ. Ischemia-modified albumin: Crosstalk between fatty acid and cobalt binding. Prostaglandins Leukot Essent Fatty Acids 2018; 135:147-157. [PMID: 30103926 PMCID: PMC6109191 DOI: 10.1016/j.plefa.2018.07.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 07/17/2018] [Accepted: 07/17/2018] [Indexed: 02/06/2023]
Abstract
Myocardial ischemia is difficult to diagnose effectively with still few well-defined biochemical markers for identification in advance, or in the absence of myocardial necrosis. "Ischemia-modified albumin" (IMA), a form of albumin displaying reduced cobalt-binding affinity, is significantly elevated in ischemic patients, and the albumin cobalt-binding (ACB) assay can measure its level indirectly. Elucidating the molecular mechanism underlying the identity of IMA and the ACB assay hinges on understanding metal-binding properties of albumin. Albumin binds most metal ions and harbours four primary metal binding sites: site A, site B, the N-terminal site (NTS), and the free thiol at Cys34. Previous efforts to clarify the identity of IMA and the causes for its reduced cobalt-binding capacity were focused on the NTS site, but the degree of N-terminal modification could not be correlated to the presence of ischemia. More recent work suggested that Co2+ ions as used in the ACB assay bind preferentially to site B, then to site A, and finally to the NTS. This insight paved the way for a new consistent molecular basis of the ACB assay: albumin is also the main plasma carrier for free fatty acids (FFAs), and binding of a fatty acid to the high-affinity site FA2 results in conformational changes in albumin which prevent metal binding at site A and partially at site B. Thus, this review advances the hypothesis that high IMA levels in myocardial ischemia and many other conditions originate from high plasma FFA levels hampering the binding of Co2+ to sites A and/or B. This is supported by biophysical studies and the co-association of a range of pathological conditions with positive ACB assays and high plasma FFA levels.
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Affiliation(s)
| | - Kondwani G H Katundu
- School of Medicine, University of St Andrews, St Andrews, United Kingdom; College of Medicine, University of Malawi, Blantyre, Malawi
| | - Amélie I S Sobczak
- School of Medicine, University of St Andrews, St Andrews, United Kingdom
| | - Swati Arya
- School of Medicine, University of St Andrews, St Andrews, United Kingdom
| | | | - Alan J Stewart
- School of Medicine, University of St Andrews, St Andrews, United Kingdom.
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41
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Young TR, Pukala TL, Cappai R, Wedd AG, Xiao Z. The Human Amyloid Precursor Protein Binds Copper Ions Dominated by a Picomolar-Affinity Site in the Helix-Rich E2 Domain. Biochemistry 2018; 57:4165-4176. [DOI: 10.1021/acs.biochem.8b00572] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Tessa R. Young
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Tara L. Pukala
- Discipline of Chemistry, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Roberto Cappai
- Department of Pharmacology and Therapeutics, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Anthony G. Wedd
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Zhiguang Xiao
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3010, Australia
- Melbourne Dementia Research Centre, Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, Victoria 3052, Australia
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42
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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: 94] [Impact Index Per Article: 15.7] [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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Castelli S, Gonçalves MB, Katkar P, Stuchi GC, Couto RAA, Petrilli HM, da Costa Ferreira AM. Comparative studies of oxindolimine-metal complexes as inhibitors of human DNA topoisomerase IB. J Inorg Biochem 2018; 186:85-94. [PMID: 29860208 DOI: 10.1016/j.jinorgbio.2018.05.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 05/18/2018] [Accepted: 05/20/2018] [Indexed: 12/17/2022]
Affiliation(s)
- Silvia Castelli
- Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica, Rome 00133, Italy
| | - Marcos Brown Gonçalves
- Departamento de Física, Universidade Tecnológica Federal do Paraná, 80230-901 Curitiba, PR, Brazil
| | - Prafulla Katkar
- Department of Biology, University of Rome Tor Vergata, Via Della Ricerca Scientifica, Rome 00133, Italy
| | - Gabriela Cristina Stuchi
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, 05508-000 São Paulo, SP, Brazil
| | - Ricardo Alexandre Alves Couto
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, 05508-000 São Paulo, SP, Brazil
| | - Helena Maria Petrilli
- Departamento de Física dos Materiais e Mecânica, Instituto de Física, Universidade de São Paulo, 05508-090 São Paulo, SP, Brazil
| | - Ana Maria da Costa Ferreira
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, 05508-000 São Paulo, SP, Brazil.
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44
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Beuning CN, Mestre-Voegtlé B, Faller P, Hureau C, Crans DC. Measurement of Interpeptidic Cu(II) Exchange Rate Constants by Static Fluorescence Quenching of Tryptophan. Inorg Chem 2018; 57:4791-4794. [DOI: 10.1021/acs.inorgchem.8b00182] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Cheryle N. Beuning
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
- Laboratoire de Chimie de Coordination, CNRS, BP 44099, 31077 Toulouse Cedex 4, France
| | - Béatrice Mestre-Voegtlé
- Laboratoire de Chimie de Coordination, CNRS, BP 44099, 31077 Toulouse Cedex 4, France
- Université of Toulouse, UPS, INPT, 31077 Toulouse Cedex 4, France
| | - Peter Faller
- Biometals and Biology Chemistry, Institut de Chimie, CNRS UMR 7177, University of Strasbourg, 67081 Strasbourg Cedex, France
| | - Christelle Hureau
- Laboratoire de Chimie de Coordination, CNRS, BP 44099, 31077 Toulouse Cedex 4, France
- Université of Toulouse, UPS, INPT, 31077 Toulouse Cedex 4, France
| | - Debbie C. Crans
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
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45
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Płonka D, Bal W. The N-terminus of hepcidin is a strong and potentially biologically relevant Cu(II) chelator. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.06.051] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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46
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Galkina PА, Proskurnin МА. Supramolecular interaction of transition metal complexes with albumins and DNA: Spectroscopic methods of estimation of binding parameters. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4150] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Polina А. Galkina
- Moscow State M.V. Lomonosov University; Department of Chemistry; Leninskiye Gory 1, bld. 3 119991 Moscow Russia
| | - Мikhail А. Proskurnin
- Moscow State M.V. Lomonosov University; Department of Chemistry; Leninskiye Gory 1, bld. 3 119991 Moscow Russia
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47
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Zhang H, Zhang C, Dong XY, Zheng J, Sun Y. Design of nonapeptide LVFFARKHH: A bifunctional agent against Cu2+
-mediated amyloid β-protein aggregation and cytotoxicity. J Mol Recognit 2018; 31:e2697. [DOI: 10.1002/jmr.2697] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 10/14/2017] [Accepted: 11/28/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Huan Zhang
- Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
| | - Chong Zhang
- Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
| | - Xiao-Yan Dong
- Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
| | - Jie Zheng
- Department of Chemical and Biomolecular Engineering; The University of Akron; Akron OH 44325 USA
| | - Yan Sun
- Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
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48
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McInnes LE, Rudd SE, Donnelly PS. Copper, gallium and zirconium positron emission tomography imaging agents: The importance of metal ion speciation. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.05.011] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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49
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Sendzik M, Pushie MJ, Stefaniak E, Haas KL. Structure and Affinity of Cu(I) Bound to Human Serum Albumin. Inorg Chem 2017; 56:15057-15065. [DOI: 10.1021/acs.inorgchem.7b02397] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Madison Sendzik
- Department of Chemistry
and Physics, Saint Mary’s College, Notre Dame, Indiana 46556, United States
| | - M. Jake Pushie
- Department of Surgery, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E5, Canada
| | - Ewelina Stefaniak
- Department of Chemistry
and Physics, Saint Mary’s College, Notre Dame, Indiana 46556, United States
- Institute
of Biochemistry and Biophysics, Polish Academy of Sciences, Pawińskiego
5a, 02-106 Warsaw, Poland
| | - Kathryn L. Haas
- Department of Chemistry
and Physics, Saint Mary’s College, Notre Dame, Indiana 46556, United States
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50
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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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