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Bellia F, Lanza V, Naletova I, Tomasello B, Ciaffaglione V, Greco V, Sciuto S, Amico P, Inturri R, Vaccaro S, Campagna T, Attanasio F, Tabbì G, Rizzarelli E. Copper(II) Complexes with Carnosine Conjugates of Hyaluronic Acids at Different Dipeptide Loading Percentages Behave as Multiple SOD Mimics and Stimulate Nrf2 Translocation and Antioxidant Response in In Vitro Inflammatory Model. Antioxidants (Basel) 2023; 12:1632. [PMID: 37627627 PMCID: PMC10452038 DOI: 10.3390/antiox12081632] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 08/07/2023] [Accepted: 08/16/2023] [Indexed: 08/27/2023] Open
Abstract
A series of copper(II) complexes with the formula [Cu2+Hy(x)Car%] varying the molecular weight (MW) of Hyaluronic acid (Hy, x = 200 or 700 kDa) conjugated with carnosine (Car) present at different loading were synthesized and characterized via different spectroscopic techniques. The metal complexes behaved as Cu, Zn-superoxide dismutase (SOD1) mimics and showed some of the most efficient reaction rate values produced using a synthetic and water-soluble copper(II)-based SOD mimic reported to date. The increase in the percentage of Car moieties parallels the enhancement of the I50 value determined via the indirect method of Fridovich. The presence of the non-functionalized Hy OH groups favors the scavenger activity of the copper(II) complexes with HyCar, recalling similar behavior previously found for the copper(II) complexes with Car conjugated using β-cyclodextrin or trehalose. In keeping with the new abilities of SOD1 to activate protective agents against oxidative stress in rheumatoid arthritis and osteoarthritis diseases, Cu2+ interaction with HyCar promotes the nuclear translocation of erythroid 2-related factor that regulates the expressions of target genes, including Heme-Oxigenase-1, thus stimulating an antioxidant response in osteoblasts subjected to an inflammatory/oxidative insult.
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Affiliation(s)
- Francesco Bellia
- Institute of Crystallography, National Council of Research (CNR), P. Gaifami 18, 95126 Catania, Italy; (F.B.); (V.L.); (I.N.); (V.C.); (T.C.); (F.A.); (E.R.)
| | - Valeria Lanza
- Institute of Crystallography, National Council of Research (CNR), P. Gaifami 18, 95126 Catania, Italy; (F.B.); (V.L.); (I.N.); (V.C.); (T.C.); (F.A.); (E.R.)
| | - Irina Naletova
- Institute of Crystallography, National Council of Research (CNR), P. Gaifami 18, 95126 Catania, Italy; (F.B.); (V.L.); (I.N.); (V.C.); (T.C.); (F.A.); (E.R.)
| | - Barbara Tomasello
- Department of Drug and Health Sciences, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy;
| | - Valeria Ciaffaglione
- Institute of Crystallography, National Council of Research (CNR), P. Gaifami 18, 95126 Catania, Italy; (F.B.); (V.L.); (I.N.); (V.C.); (T.C.); (F.A.); (E.R.)
| | - Valentina Greco
- Department of Chemical Sciences, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy; (V.G.); (S.S.)
| | - Sebastiano Sciuto
- Department of Chemical Sciences, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy; (V.G.); (S.S.)
| | - Pietro Amico
- Fidia Farmaceutici SpA, Contrada Pizzuta, 96017 Noto, Italy; (P.A.); (R.I.); (S.V.)
| | - Rosanna Inturri
- Fidia Farmaceutici SpA, Contrada Pizzuta, 96017 Noto, Italy; (P.A.); (R.I.); (S.V.)
| | - Susanna Vaccaro
- Fidia Farmaceutici SpA, Contrada Pizzuta, 96017 Noto, Italy; (P.A.); (R.I.); (S.V.)
| | - Tiziana Campagna
- Institute of Crystallography, National Council of Research (CNR), P. Gaifami 18, 95126 Catania, Italy; (F.B.); (V.L.); (I.N.); (V.C.); (T.C.); (F.A.); (E.R.)
| | - Francesco Attanasio
- Institute of Crystallography, National Council of Research (CNR), P. Gaifami 18, 95126 Catania, Italy; (F.B.); (V.L.); (I.N.); (V.C.); (T.C.); (F.A.); (E.R.)
| | - Giovanni Tabbì
- Institute of Crystallography, National Council of Research (CNR), P. Gaifami 18, 95126 Catania, Italy; (F.B.); (V.L.); (I.N.); (V.C.); (T.C.); (F.A.); (E.R.)
| | - Enrico Rizzarelli
- Institute of Crystallography, National Council of Research (CNR), P. Gaifami 18, 95126 Catania, Italy; (F.B.); (V.L.); (I.N.); (V.C.); (T.C.); (F.A.); (E.R.)
- Department of Chemical Sciences, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy; (V.G.); (S.S.)
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2
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Saikia J, Bhat VT, Potnuru LR, Redkar AS, Agarwal V, Ramakrishnan V. Minimalist De Novo Design of an Artificial Enzyme. ACS OMEGA 2022; 7:19131-19140. [PMID: 35721939 PMCID: PMC9202009 DOI: 10.1021/acsomega.1c07075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 05/16/2022] [Indexed: 06/15/2023]
Abstract
We employed a reductionist approach in designing the first heterochiral tripeptide that forms a robust heterogeneous short peptide catalyst similar to the "histidine brace" active site of lytic polysaccharide monooxygenases. The histidine brace is a conserved divalent copper ion-binding motif that comprises two histidine side chains and an amino group to create the T-shaped 3N geometry at the reaction center. The geometry parameters, including a large twist angle (73°) between the two imidazole rings of the model complex, are identical to those of native lytic polysaccharide monooxygenases (72.61°). The complex was synthesized and characterized as a structural and functional mimic of the histidine brace. UV-vis, vis-circular dichroism, Raman, and electron paramagnetic resonance spectroscopic analyses suggest a distorted square-pyramidal geometry with a 3N coordination at pH 7. Solution- and solid-state NMR results further confirm the 3N coordination in the copper center of the complex. The complex is pH-dependent and could catalyze the oxidation of benzyl alcohol in water to benzaldehyde with yields up to 82% in 3 h at pH 7 and above at 40 °C. The catalyst achieved 100% selectivity for benzaldehyde compared to conventional copper catalysis. The design of such a minimalist building block for functional soft materials with a pH switch can be a stepping stone in addressing needs for a cleaner and sustainable future catalyst.
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Affiliation(s)
- Jahnu Saikia
- Department
of Biosciences and Bioengineering, Indian
Institute of Technology Guwahati, Guwahati 781039, India
| | - Venugopal T. Bhat
- Organic
Synthesis and Catalysis Laboratory SRM Research Institute and Department
of Chemistry SRM Institute of Science and Technology, Kattankulathur 603203, Tamilnadu, India
| | - Lokeswara Rao Potnuru
- TIFR
Centre for Interdisciplinary Sciences, Tata
Institute of Fundamental Research Hyderabad, Hyderabad 500107, India
| | - Amay S. Redkar
- Department
of Biosciences and Bioengineering, Indian
Institute of Technology Guwahati, Guwahati 781039, India
| | - Vipin Agarwal
- TIFR
Centre for Interdisciplinary Sciences, Tata
Institute of Fundamental Research Hyderabad, Hyderabad 500107, India
| | - Vibin Ramakrishnan
- Department
of Biosciences and Bioengineering, Indian
Institute of Technology Guwahati, Guwahati 781039, India
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3
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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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4
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Peana M, Gumienna-Kontecka E, Piras F, Ostrowska M, Piasta K, Krzywoszynska K, Medici S, Zoroddu MA. Exploring the Specificity of Rationally Designed Peptides Reconstituted from the Cell-Free Extract of Deinococcus radiodurans toward Mn(II) and Cu(II). Inorg Chem 2020; 59:4661-4684. [PMID: 32212645 PMCID: PMC7467671 DOI: 10.1021/acs.inorgchem.9b03737] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
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A series of five
rationally designed decapeptides [DEHGTAVMLK (DP1), THMVLAKGED (DP2),
GTAVMLKDEH (Term-DEH), TMVLDEHAKG (Mid-DEH), and DEHGGGGDEH (Bis-DEH)]
have been studied for their interactions with Cu(II) and Mn(II) ions.
The peptides, constructed including the most prevalent amino acid
content found in the cell-free extract of Deinococcus radiodurans (DR), play a fundamental role in the antioxidant mechanism related
to its exceptional radioresistance. Mn(II) ions, in complex with these
peptides, are found to be an essential ingredient for the DR protection
kit. In this work, a detailed characterization of Cu(II) systems was
included, because Cu(II)–peptide complexes have also shown
remarkable antioxidant properties. All peptides studied contain in
their sequence coordinating residues that can bind effectively Mn(II)
or Cu(II) ions with high affinity, such as Asp, Glu, and His. Using
potentiometric techniques, NMR, EPR, UV–vis, and CD spectroscopies,
ESI-MS spectrometry, and molecular model calculations, we explored
the binding properties and coordination modes of all peptides toward
the two metal ions, were able to make a metal affinity comparison
for each metal system, and built a structural molecular model for
the most stable Cu(II) and Mn(II) complexes in agreement with experimental
evidence. Five rationally designed decapeptides
reconstituted from the cell-free extract of Deinococcus radiodurans have been precisely analyzed in terms of their coordination properties
toward Mn(II) and Cu(II). The results provide new insight to enhance
our understanding of the impact of metal complexes in the protection
of the bacterium from various damaging agents such as ionizing radiation,
ultraviolet radiation, and oxidative stress and novel information
useful for exploiting this extraordinary ability in future biotechnological
applications.
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Affiliation(s)
- Massimiliano Peana
- Department of Chemistry and Pharmacy, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | | | - Francesca Piras
- Department of Chemistry and Pharmacy, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Malgorzata Ostrowska
- Faculty of Chemistry, University of Wrocław, Fryderyka Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Karolina Piasta
- Faculty of Chemistry, University of Wrocław, Fryderyka Joliot-Curie 14, 50-383 Wrocław, Poland
| | | | - Serenella Medici
- Department of Chemistry and Pharmacy, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
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5
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A Pentapeptide with Tyrosine Moiety as Fluorescent Chemosensor for Selective Nanomolar-Level Detection of Copper(II) Ions. Int J Mol Sci 2020; 21:ijms21030743. [PMID: 31979365 PMCID: PMC7037753 DOI: 10.3390/ijms21030743] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 01/17/2020] [Accepted: 01/21/2020] [Indexed: 11/17/2022] Open
Abstract
Herein, we have investigated principally with the use of UV and fluorescence (steady-state and time-resolved) spectroscopy the interactions between selected pentapeptides with tyrosine residue (EYHHQ, EHYHQ, EHHQY, and KYHHE) and various metal ions (Cu2+, Mn2+, Co2+, Ni2+, Zn2+, Cr3+, Cd2+, Ag+, Pb2+, Sr2+, Ba2+, Ca2+, Mg2+, Al3+, Fe2+, and Ga3+) in order to establish the relationship between the position of a tyrosine residue in the peptide sequence and the metal ion-binding properties. Among the peptides studied, EHYHQ was evaluated as an efficient and selective ligand for developing a chemosensor for the detection of copper(II) ions. While significant fluorescence emission quenching was observed for that peptide in the presence of Cu2+ cations, other metal cations used at the same and at considerably higher concentrations caused a negligible change of the fluorescence emission spectrum, indicating a high selectivity of EHYHQ for Cu2+ ions. Under optimum conditions, fluorescence intensity was inversely proportional to the concentration of Cu2+ ions. The limit of detection of Cu2+ ions with the use of EHYHQ was determined at the level of 26.6 nM. The binding stoichiometry of the complexes of the studied peptides with Cu2+ ions was evaluated spectrophotometrically and fluorimetrically (as in the case of EHYHQ confirmed by mass spectrometry) and found to be 1:2 (Cu2+-peptide) for all the investigated systems. Furthermore, the stability constant (K) values of these complexes were determined. The reversibility of the proposed Cu2+ ions sensor was confirmed, the pH range where the sensor acts was determined, while its analytical performance was compared with some other reported recently fluorescent sensors. The mechanism of the interactions between EHYHQ and Cu2+ was proposed on the basis of NMR spectroscopy investigations.
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6
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Navarro Poupard MF, Polo E, Taboada P, Arenas-Vivo A, Horcajada P, Pelaz B, del Pino P. Aqueous Synthesis of Copper(II)-Imidazolate Nanoparticles. Inorg Chem 2018; 57:12056-12065. [DOI: 10.1021/acs.inorgchem.8b01612] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | - Ana Arenas-Vivo
- Advanced Porous Materials Unit, IMDEA Energy, 28935 Móstoles, Madrid, Spain
| | - Patricia Horcajada
- Advanced Porous Materials Unit, IMDEA Energy, 28935 Móstoles, Madrid, Spain
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7
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Magrì A, Grasso G, Corti F, Finetti F, Greco V, Santoro AM, Sciuto S, La Mendola D, Morbidelli L, Rizzarelli E. Peptides derived from the histidine–proline rich glycoprotein bind copper ions and exhibit anti-angiogenic properties. Dalton Trans 2018; 47:9492-9503. [DOI: 10.1039/c8dt01560k] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A peptide belonging to the histidine–proline rich glycoprotein binds copper(ii), inhibiting metal angiogenic responses in endothelial cells.
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Affiliation(s)
- Antonio Magrì
- Istituto di Biostrutture eBioimmagini-CNR
- 95126 Catania
- Italy
| | - Giulia Grasso
- Istituto di Biostrutture eBioimmagini-CNR
- 95126 Catania
- Italy
| | - Federico Corti
- Yale Cardiovascular Research Center
- Yale University
- New Haven
- USA
| | - Federica Finetti
- Dipartimento di Biotecnologie
- Chimica e Farmacia
- Università di Siena
- 53100 Siena
- Italy
| | - Valentina Greco
- Dipartimento di Scienze Chimiche
- Università di Catania
- 95125 Catania
- Italy
| | | | - Sebastiano Sciuto
- Dipartimento di Scienze Chimiche
- Università di Catania
- 95125 Catania
- Italy
| | | | - Lucia Morbidelli
- Dipartimento di Scienze della Vita
- Università di Siena
- 53100 Siena
- Italy
| | - Enrico Rizzarelli
- Dipartimento di Scienze Chimiche
- Università di Catania
- 95125 Catania
- Italy
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8
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Hecel A, Wątły J, Rowińska-Żyrek M, Świątek-Kozłowska J, Kozłowski H. Histidine tracts in human transcription factors: insight into metal ion coordination ability. J Biol Inorg Chem 2018; 23:81-90. [PMID: 29218639 PMCID: PMC5756558 DOI: 10.1007/s00775-017-1512-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 11/03/2017] [Indexed: 12/19/2022]
Abstract
Consecutive histidine repeats are chosen both by nature and by molecular biologists due to their high affinity towards metal ions. Screening of the human genome showed that transcription factors are extremely rich in His tracts. In this work, we examine two of such His-rich regions from forkhead box and MAFA proteins-MB3 (contains 18 His) and MB6 (with 21 His residues), focusing on the affinity and binding modes of Cu2+ and Zn2+ towards the two His-rich regions. In the case of Zn2+ species, the availability of imidazole nitrogen donors enhances metal complex stability. Interestingly, an opposite tendency is observed for Cu2+ complexes at above physiological pH, in which amide nitrogens participate in binding.
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Affiliation(s)
- Aleksandra Hecel
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383, Wrocław, Poland.
| | - Joanna Wątły
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383, Wrocław, Poland
| | | | | | - Henryk Kozłowski
- Public Higher Medical Professional School in Opole, Katowicka 68, 45-060, Opole, Poland.
- Wroclaw Research Centre EIT+, Stabłowicka 147, 54-066, Wrocław, Poland.
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9
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Metal interactions with the transmembrane region of HupE Ni 2+ transporter explain its efficiency. J Inorg Biochem 2017; 180:33-38. [PMID: 29227924 DOI: 10.1016/j.jinorgbio.2017.11.026] [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: 10/18/2017] [Revised: 11/17/2017] [Accepted: 11/29/2017] [Indexed: 11/23/2022]
Abstract
Efficient nickel transport is crucial for the survival and virulence of various bacteria and fungi, with Ni2+ being required for the activity of nine enzymes such as [NiFe] hydrogenase, which catalyzes the reversible oxidation of molecular hydrogen for energy production. This work focuses on a region of transmembrane domain I from the HupE nickel transporter, highly conserved in the HupE/UreJ and NiCoT permease families, analyzing its interactions with native Ni2+ and two other metal ions (Cu2+ and Zn2+), which might interfere with nickel binding. Metal coordination sites are pointed out and thermodynamic parameters are discussed in detail. Their comparison to the previously studied periplasmic metal binding region satisfies our chemical curiosity and allows to draw conclusions about HupE metal specificity. The results of this study explain one of the reasons why HupE is a medium-affinity and low-capacity transporter - its periplasmic region, 22HVGLHADGTLAGLN35, binds Ni2+ with much higher affinity than the transmembrane 36HPFSGLDH43 one, which should transport the metal inside the cell. Moreover, the specificity of the transmembrane region is similar to that of the periplasmic one and to that of the full-length HupE - Cu2+ ions are able to outcompete Ni2+.
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10
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Peana M, Zdyb K, Medici S, Pelucelli A, Simula G, Gumienna-Kontecka E, Zoroddu MA. Ni(II) interaction with a peptide model of the human TLR4 ectodomain. J Trace Elem Med Biol 2017; 44:151-160. [PMID: 28965571 DOI: 10.1016/j.jtemb.2017.07.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 07/18/2017] [Accepted: 07/27/2017] [Indexed: 12/29/2022]
Abstract
Ni(II) stimulates innate immunity via the direct binding to human Toll Like Receptor 4 (hTLR4), the bacterial lypopolysaccharide receptor. The binding is specific for humans and causes nickel contact allergy. The protein sequence analysis of hTLR4 revealed that the ectodomain, the region supposed to coordinate the metal ions, contains a histidine-rich motif that is not conserved among all organisms. To elucidate the role of each histidine residue on the protein-nickel binding, we examined the formation of Ni(II) complexes with the model peptide NH2-FQHSNRKQMSERSVFRSRRNRIYRDISHTHTR-COO-, which encompasses the sequence 429-460 of hTLR4. The amino acid sequence of the peptide has been modified by the substitution of some selected lipophilic residues (Leu and Phe) with hydrophilic residues (Arg), aiming at increasing the peptide hydro solubility of the protein fragment. Potentiometric, ultraviolet-visible (UV-vis), nuclear magnetic resonance (NMR) and circular dichroism (CD) measurements demonstrate that the non-conserved histidines in the ectodomain cooperate in metal coordination and consequently enable the activation of the molecular mechanism of nickel hypersensitivity reaction.
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Affiliation(s)
| | - Karolina Zdyb
- Faculty of Chemistry, University of Wroclaw, Poland.
| | - Serenella Medici
- Department of Chemistry and Pharmacy, University of Sassari, Italy
| | | | - Giancarlo Simula
- Department of Chemistry and Pharmacy, University of Sassari, Italy
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11
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Maiti BK, Almeida RM, Maia LB, Moura I, Moura JJG. Insights into the Molybdenum/Copper Heterometallic Cluster Assembly in the Orange Protein: Probing Intermolecular Interactions with an Artificial Metal-Binding ATCUN Tag. Inorg Chem 2017; 56:8900-8911. [PMID: 28742344 DOI: 10.1021/acs.inorgchem.7b00840] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Orange protein (ORP) is a small bacterial protein, of unknown function, that contains a unique molybdenum/copper heterometallic cluster, [S2MoVIS2CuIS2MoVIS2]3- (Mo/Cu), non-covalently bound. The native cluster can be reconstituted in a protein-assisted mode by the addition of CuII plus tetrathiomolybdate to apo-ORP under controlled conditions. In the work described herein, we artificially inserted the ATCUN ("amino terminus Cu and Ni") motif in the Desulfovibrio gigas ORP (Ala1Ser2His3 followed by the native amino acid residues; modified protein abbreviated as ORP*) to increase our understanding of the Mo/Cu cluster assembly in ORP. The apo-ORP* binds CuII in a 1:1 ratio to yield CuII-ORP*, as clearly demonstrated by EPR (g||,⊥ = 2.183, 2.042 and ACu||,⊥ = 207 × 10-4 cm-1, 19 × 10-4 cm-1) and UV-visible spectroscopies (typical d-d transition bands at 520 nm, ε = 90 M-1 cm-1). The 1H NMR spectrum shows that His3 and His53 are significantly affected upon the addition of the CuII. The X-ray structure shows that these two residues are very far apart (Cα-Cα ≈ 27.9 Å), leading us to suggest that the metal-induced NMR perturbations are due to the interaction of two protein molecules with a single metal ion. Docking analysis supports the metal-mediated dimer formation. The subsequent tetrathiomolybdate binding, to yield the native Mo/Cu cluster, occurs only upon addition of dithiothreitol, as shown by UV-visible and NMR spectroscopies. Additionally, 1H NMR of AgI-ORP* (AgI used as a surrogate of CuI) showed that AgI strongly binds to a native methionine sulfur atom rather than to the ATCUN site, suggesting that CuII and CuI have two different binding sites in ORP*. A detailed mechanism for the formation of the Mo/Cu cluster is discussed, suggesting that CuII is reduced to CuI and transferred from the ATCUN motif to the methionine site; finally, CuI is transferred to the cluster-binding region, upon the interaction of two protein molecules. This result may suggest that copper trafficking is triggered by redox-dependent coordination properties of copper in a trafficking pathway.
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Affiliation(s)
- Biplab K Maiti
- UCIBIO, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa , 2829-516 Caparica, Portugal
| | - Rui M Almeida
- UCIBIO, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa , 2829-516 Caparica, Portugal
| | - Luisa B Maia
- UCIBIO, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa , 2829-516 Caparica, Portugal
| | - Isabel Moura
- UCIBIO, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa , 2829-516 Caparica, Portugal
| | - José J G Moura
- UCIBIO, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa , 2829-516 Caparica, Portugal
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12
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Rowińska-Żyrek M. Periplasmic HupE region-Ni 2+ interactions: Thermodynamics, binding mode and competition with Cu 2+ and Zn 2+. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2016.08.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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13
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Di Natale G, Sinopoli A, Grenács Á, Sanna D, Sóvágó I, Pappalardo G. Copper(ii) coordination properties of the Aβ(1–16)2 peptidomimetic: experimental evidence of intermolecular macrochelate complex species in the Aβ dimer. NEW J CHEM 2016. [DOI: 10.1039/c6nj02354a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The coordination features of the copper(ii) complexes with a Aβ(1–16)2 dimeric model are reported for the first time.
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Affiliation(s)
| | - Alessandro Sinopoli
- PhD Program in Translational Biomedicine
- University of Catania
- 95125 Catania
- Italy
| | - Ágnes Grenács
- Department of Inorganic and Analytical Chemistry
- University of Debrecen
- Hungary
| | - Daniele Sanna
- CNR Institute of Biomolecular Chemistry
- 07040 Sassari
- Italy
| | - Imre Sóvágó
- Department of Inorganic and Analytical Chemistry
- University of Debrecen
- Hungary
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Nguyen TT, Bea SO, Kim DM, Yoon WJ, Park JW, An SSA, Ju H. A regenerative label-free fiber optic sensor using surface plasmon resonance for clinical diagnosis of fibrinogen. Int J Nanomedicine 2015; 10 Spec Iss:155-63. [PMID: 26347331 PMCID: PMC4556302 DOI: 10.2147/ijn.s88963] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Purpose We present the regenerative label-free fiber optical biosensor that exploits surface plasmon resonance for quantitative detection of fibrinogen (Fbg) extracted from human blood plasma. Materials and methods The sensor head was made up of a multimode optical fiber with its polymer cladding replaced by metal composite of nanometer thickness made of silver, aluminum, and nickel. The Ni layer coated allowed a direct immobilization of histidine-tagged peptide (HP) on its metal surface without an additional cross-linker in between. On the coated HP layer, immunoglobulin G was then immobilized for specific capturing of Fbg. Results We demonstrated a real-time quantitative detection of Fbg concentrations with limit of detection of ~10 ng/mL. The fact that the HP layer could be removed by imidazole with acid also permitted us to demonstrate the regeneration of the outermost metal surface of the sensor head for the sensor reusability. Conclusion The sensor detection limit was estimated to be ~10 pM, which was believed to be sensitive enough for detecting Fbg during the clinical diagnosis of cardiovascular diseases, myocardial infarction, strokes, and Alzheimer’s diseases.
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Affiliation(s)
- Tan Tai Nguyen
- Department of Bionano Technology, College of Bionano Technology, Gachon University, Seongnam, South Korea
| | - Sun Oh Bea
- Department of Bionano Technology, College of Bionano Technology, Gachon University, Seongnam, South Korea
| | - Dong Min Kim
- Department of Materials Science and Engineering, Hongik University, Sejong City, South Korea
| | - Won Jung Yoon
- Department of Chemical and Bio Engineering, Gachon University, Seongnam, South Korea
| | - Jin-Won Park
- Department of Chemical and Biomolecular Engineering, College of Energy and Biotechnology, Seoul National University of Science and Technology, Seoul, South Korea
| | - Seong Soo A An
- Department of Bionano Technology, College of Bionano Technology, Gachon University, Seongnam, South Korea
| | - Heongkyu Ju
- Department of Bionano Technology, College of Bionano Technology, Gachon University, Seongnam, South Korea ; Department of Nanophysics, College of Bionano Technology, Gachon University, Seongnam, South Korea ; Neuroscience Institute, Gil Hospital, Incheon, South Korea
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15
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Gupta A, Krishna KV, Verma S. Microstructure manipulation and guest release from cation responsive peptide microspheres. RSC Adv 2015. [DOI: 10.1039/c5ra15827c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A thiolated C3-symmetric dihistidine conjugate and its self-assembly to yield nanospheres. Doughnut shaped, porous microspheres formed upon co-incubation with ATP that can be triggered to release cargo in response to cationic stimulus.
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Affiliation(s)
- Astha Gupta
- Department of Chemical Engineering
- Indian Institute of Technology Kanpur
- Kanpur-208016
- India
| | - K. Vijaya Krishna
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur-208016
- India
| | - Sandeep Verma
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur-208016
- India
- DST Unit of Excellence on Soft Nanofabrication
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16
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Wang C, Wang C, Li B, Li H. Zn(II) chelating with peptides found in sesame protein hydrolysates: Identification of the binding sites of complexes. Food Chem 2014; 165:594-602. [DOI: 10.1016/j.foodchem.2014.05.146] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 05/19/2014] [Accepted: 05/27/2014] [Indexed: 10/25/2022]
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17
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Hamley IW, Kirkham S, Dehsorkhi A, Castelletto V, Adamcik J, Mezzenga R, Ruokolainen J, Mazzuca C, Gatto E, Venanzi M, Placidi E, Bilalis P, Iatrou H. Self-Assembly of a Model Peptide Incorporating a Hexa-Histidine Sequence Attached to an Oligo-Alanine Sequence, and Binding to Gold NTA/Nickel Nanoparticles. Biomacromolecules 2014; 15:3412-20. [DOI: 10.1021/bm500950c] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Ian W. Hamley
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, United Kingdom
| | - Steven Kirkham
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, United Kingdom
| | - Ashkan Dehsorkhi
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, United Kingdom
| | - Valeria Castelletto
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, United Kingdom
| | - Jozef Adamcik
- Food and Soft Materials Science, ETH Zürich, Schmelzbergstrasse 9, 8092 Zürich, Switzerland
| | - Raffaele Mezzenga
- Food and Soft Materials Science, ETH Zürich, Schmelzbergstrasse 9, 8092 Zürich, Switzerland
| | - Janne Ruokolainen
- Department
of Applied Physics, Aalto University School of Science, P.O. Box 15100, FI-00076 Aalto, Finland
| | - Claudia Mazzuca
- Department of Chemical Sciences
and Technologies, University of Rome “Tor Vergata”, Via
Ricerca Scientifica 1, 00133 Rome, Italy
| | - Emanuela Gatto
- Department of Chemical Sciences
and Technologies, University of Rome “Tor Vergata”, Via
Ricerca Scientifica 1, 00133 Rome, Italy
| | - Mariano Venanzi
- Department of Chemical Sciences
and Technologies, University of Rome “Tor Vergata”, Via
Ricerca Scientifica 1, 00133 Rome, Italy
| | - Ernesto Placidi
- Institute of Structure of
Matter, CNR, Department of Physics, University of Rome “Tor Vergata”, 00133 Rome, Italy
| | - Panayiotis Bilalis
- University of Athens, Department of Chemistry, Panepistimiopolis Zografou, 157 71 Athens, Greece
| | - Hermis Iatrou
- University of Athens, Department of Chemistry, Panepistimiopolis Zografou, 157 71 Athens, Greece
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18
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Watly J, Simonovsky E, Wieczorek R, Barbosa N, Miller Y, Kozlowski H. Insight into the coordination and the binding sites of Cu(2+) by the histidyl-6-tag using experimental and computational tools. Inorg Chem 2014; 53:6675-83. [PMID: 24905906 DOI: 10.1021/ic500387u] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
His-tags are specific sequences containing six to nine subsequent histydyl residues, and they are used for purification of recombinant proteins by use of IMAC chromatography. Such polyhistydyl tags, often used in molecular biology, can be also found in nature. Proteins containing histidine-rich domains play a critical role in many life functions in both prokaryote and eukaryote organisms. Binding mode and the thermodynamic properties of the system depend on the specific metal ion and the histidine sequence. Despite the wide application of the His-tag for purification of proteins, little is known about the properties of metal-binding to such tag domains. This inspired us to undertake detailed studies on the coordination of Cu(2+) ion to hexa-His-tag. Experiments were performed using the potentiometric, UV-visible, CD, and EPR techniques. In addition, molecular dynamics (MD) simulations and density functional theory (DFT) calculations were applied. The experimental studies have shown that the Cu(2+) ion binds most likely to two imidazoles and one, two, or three amide nitrogens, depending on the pH. The structures and stabilities of the complexes for the Cu(2+)-Ac-(His)6-NH2 system using experimental and computational tools were established. Polymorphic binding states are suggested, with a possibility of the formation of α-helix structure induced by metal ion coordination. Metal ion is bound to various pairs of imidazole moieties derived from the tag with different efficiencies. The coordination sphere around the metal ion is completed by molecules of water. Finally, the Cu(2+) binding by Ac-(His)6-NH2 is much more efficient compared to other multihistidine protein domains.
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Affiliation(s)
- Joanna Watly
- Faculty of Chemistry, University of Wroclaw , 50-383 Wroclaw, Poland
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19
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Interaction of Cu(II) and Ni(II) with Ypk9 protein fragment via NMR studies. ScientificWorldJournal 2014; 2014:656201. [PMID: 24790577 PMCID: PMC3982466 DOI: 10.1155/2014/656201] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Accepted: 01/15/2014] [Indexed: 01/27/2023] Open
Abstract
P1D2E3K4H5E6L7 (PK9-H), a fragment of Ypk9, the yeast homologue of the human Park9 protein, was studied for its coordination abilities towards Ni(II) and Cu(II) ions through mono- and bi-dimensional NMR techniques. Both proteins are involved in the transportation of metal ions, including manganese and nickel, from the cytosol to the lysosomal lumen. Ypk9 showed manganese detoxification role, preventing a Mn-induced Parkinsonism (PD) besides mutations in Park9, linked to a juvenile form of the disease. Here, we tested PK9-H with Cu(II) and Ni(II) ions, the former because it is an essential element ubiquitous in the human body, so its trafficking should be strictly regulated and one cannot exclude that Ypk9 may play a role in it, and the latter because, besides being a toxic element for many organisms and involved in different pathologies and inflammation states, it seems that the protein confers protection against it. NMR experiments showed that both cations can bind PK9-H in an effective way, leading to complexes whose coordination mode depends on the pH of the solution. NMR data have been used to build a model for the structure of the major Cu(II) and Ni(II) complexes. Structural changes in the conformation of the peptide with organized side chain orientation promoted by nickel coordination were detected.
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20
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Ploss M, Facey SJ, Bruhn C, Zemel L, Hofmann K, Stark RW, Albert B, Hauer B. Selection of peptides binding to metallic borides by screening M13 phage display libraries. BMC Biotechnol 2014; 14:12. [PMID: 24512376 PMCID: PMC3924706 DOI: 10.1186/1472-6750-14-12] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Accepted: 01/29/2014] [Indexed: 01/16/2023] Open
Abstract
Background Metal borides are a class of inorganic solids that is much less known and investigated than for example metal oxides or intermetallics. At the same time it is a highly versatile and interesting class of compounds in terms of physical and chemical properties, like semiconductivity, ferromagnetism, or catalytic activity. This makes these substances attractive for the generation of new materials. Very little is known about the interaction between organic materials and borides. To generate nanostructured and composite materials which consist of metal borides and organic modifiers it is necessary to develop new synthetic strategies. Phage peptide display libraries are commonly used to select peptides that bind specifically to metals, metal oxides, and semiconductors. Further, these binding peptides can serve as templates to control the nucleation and growth of inorganic nanoparticles. Additionally, the combination of two different binding motifs into a single bifunctional phage could be useful for the generation of new composite materials. Results In this study, we have identified a unique set of sequences that bind to amorphous and crystalline nickel boride (Ni3B) nanoparticles, from a random peptide library using the phage display technique. Using this technique, strong binders were identified that are selective for nickel boride. Sequence analysis of the peptides revealed that the sequences exhibit similar, yet subtle different patterns of amino acid usage. Although a predominant binding motif was not observed, certain charged amino acids emerged as essential in specific binding to both substrates. The 7-mer peptide sequence LGFREKE, isolated on amorphous Ni3B emerged as the best binder for both substrates. Fluorescence microscopy and atomic force microscopy confirmed the specific binding affinity of LGFREKE expressing phage to amorphous and crystalline Ni3B nanoparticles. Conclusions This study is, to our knowledge, the first to identify peptides that bind specifically to amorphous and to crystalline Ni3B nanoparticles. We think that the identified strong binding sequences described here could potentially serve for the utilisation of M13 phage as a viable alternative to other methods to create tailor-made boride composite materials or new catalytic surfaces by a biologically driven nano-assembly synthesis and structuring.
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Affiliation(s)
| | | | | | | | | | | | | | - Bernhard Hauer
- Institute of Technical Biochemistry, University of Stuttgart, Allmandring 31, 70569 Stuttgart, Germany.
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21
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Zoroddu MA, Peana M, Medici S, Potocki S, Kozlowski H. Ni(ii) binding to the 429–460 peptide fragment from human Toll like receptor (hTLR4): a crucial role for nickel-induced contact allergy? Dalton Trans 2014; 43:2764-71. [DOI: 10.1039/c3dt52187g] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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22
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23
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Peana M, Medici S, Nurchi VM, Crisponi G, Lachowicz JI, Zoroddu MA. Manganese and cobalt binding in a multi-histidinic fragment. Dalton Trans 2013; 42:16293-301. [DOI: 10.1039/c3dt51091c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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24
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Remelli M, Peana M, Medici S, Delogu LG, Zoroddu MA. Interaction of divalent cations with peptide fragments from Parkinson's disease genes. Dalton Trans 2013. [DOI: 10.1039/c2dt32222f] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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25
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du Preez LL, Patterton HG. Secondary structures of the core histone N-terminal tails: their role in regulating chromatin structure. Subcell Biochem 2013; 61:37-55. [PMID: 23150245 DOI: 10.1007/978-94-007-4525-4_2] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The core histone N-terminal tails dissociate from their binding positions in nucleosomes at moderate salt concentrations, and appear unstructured in the crystal. This suggested that the tails contributed minimally to chromatin structure. However, in vitro studies have shown that the tails were involved in a range of intra- and inter-nucleosomal as well as inter-fibre contacts. The H4 tail, which is essential for chromatin compaction, was shown to contact an adjacent nucleosome in the crystal. Acetylation of H4K16 was shown to abolish the ability of a nucleosome array to fold into a 30 nm fibre. The application of secondary structure prediction software has suggested the presence of extended structured regions in the histone tails. Molecular Dynamics studies have further shown that sections of the H3 and H4 tails assumed α-helical and β-strand content that was enhanced by the presence of DNA, and that post-translational modifications of the tails had a major impact on these structures. Circular dichroism and NMR showed that the H3 and H4 tails exhibited significant α-helical content, that was increased by acetylation of the tail. There is thus strong evidence, both from biophysical and from computational approaches, that the core histones tails, particularly that of H3 and H4, are structured, and that these structures are influenced by post-translational modifications. This chapter reviews studies on the position, binding sites and secondary structures of the core histone tails, and discusses the possible role of the histone tail structures in the regulation of chromatin organization, and its impact on human disease.
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Affiliation(s)
- Louis L du Preez
- Advanced Biomolecular Research Cluster, University of the Free State, 339, Bloemfontein, 9300, South Africa
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26
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Joshi S, Ghosh I, Pokhrel S, Mädler L, Nau WM. Interactions of amino acids and polypeptides with metal oxide nanoparticles probed by fluorescent indicator adsorption and displacement. ACS NANO 2012; 6:5668-5679. [PMID: 22591378 DOI: 10.1021/nn301669t] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The adsorption of polypeptides containing an N-terminal tryptophan (Trp) residue attached to a hexa-backbone of alanine, serine, lysine, histidine, and aspartate was investigated by monitoring the fluorescence response of the Trp chromophore upon titration with metal oxide nanoparticles (MOx-NPs: CuO, Co(3)O(4), TiO(2), MgO, and CeO(2)). After correction for light-scattering effects, a strong static fluorescence quenching was observed upon addition of CuO and Co(3)O(4) to the peptides. The interaction of MOx-NPs with the peptides was assigned to an adsorption of the peptide backbone on the nanoparticle surface. The method was refined using a derivatized amino acid, 5-fluoro-Trp (5F-Trp), which resulted in a stronger fluorescence response. The use of the fluorescent amino acid labels allowed the direct assessment of the adsorption propensities of Trp-containing peptides in dependence on the backbone, which was verified by zeta-potential measurements. Moreover, upon addition of different analytes to nanoparticles with preadsorbed Trp-containing polypeptides, adsorption propensities of the analytes were assessed by an indicator displacement strategy; that is, addition of increasing amounts of analyte resulted in a continuous fluorescence enhancement/recovery. This method afforded adsorption propensities for several analytes. The relative binding constants for the MOx-NPs, obtained from the competitive titrations, varied by more than 6 orders of magnitude for CuO (5F-TrpHis(6)-NH(2) > TrpAsp(6)-NH(2), TrpSer(6)-NH(2) > TrpLys(6)-NH(2), Trp, 5F-Trp > TrpAla(6)-NH(2)) but only 4 for Co(3)O(4) (TrpHis(6)-NH(2), TrpAsp(6)-NH(2) ≫ TrpLys(6)-NH(2), TrpAla(6)-NH(2), TrpSer(6)-NH(2), Trp, 5F-Trp). The study reveals that MOx-NPs adsorb biomolecular analytes with high selectivity, which has immediate implications for their applications in protein purification, drug delivery, and, potentially, for the assessment of their toxicology.
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Affiliation(s)
- Sweccha Joshi
- School of Engineering and Science, Jacobs University Bremen, Campus Ring 1, D-28759 Bremen, Germany
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27
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Wang C, Li B, Ao J. Separation and identification of zinc-chelating peptides from sesame protein hydrolysate using IMAC-Zn²⁺ and LC-MS/MS. Food Chem 2012; 134:1231-8. [PMID: 23107753 DOI: 10.1016/j.foodchem.2012.02.204] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2011] [Revised: 01/07/2012] [Accepted: 02/29/2012] [Indexed: 01/21/2023]
Abstract
The metal chelating peptides from sesame protein hydrolysates (SPH), treated by papain, alcalase and trypsin, respectively, were investigated. The hydrolysates treated by trypsin had the highest metal chelating ability. The metal chelating peptides were isolated from the trypsin hydrolysates using immobilized metal affinity chromatography (IMAC-Zn(2+)). Further, six zinc-chelating peptides were identified with reversed phase (RP)-HPLC and mass spectrometry (LC-MS/MS). Three of these metal-chelating peptides, Ser-Met, Leu-Ala-Asn and Asn-Cys-Ser, were synthesized and the metal-chelating ability of peptides was measured. The Asn-Cys-Ser peptide showed the highest zinc and iron chelating ability, which was even higher than reduced glutathione (GSH). The results confirm that the zinc or iron chelating activity of these peptides, and provide further support to its feasibility as natural metal chelating agents from sesame protein.
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Affiliation(s)
- Chan Wang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
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28
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Influence of Cu supplementation on toxic and essential trace element status in intensive reared beef cattle. Food Chem Toxicol 2011; 49:3358-66. [DOI: 10.1016/j.fct.2011.09.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2011] [Revised: 08/31/2011] [Accepted: 09/15/2011] [Indexed: 11/23/2022]
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29
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Freeman JO, Sherman JC. Conformationally Constrained Sequence Designs to Bias Monomer-Dimer Equilibriums in TASP Systems. Chemistry 2011; 17:14120-8. [DOI: 10.1002/chem.201102171] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Indexed: 11/12/2022]
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30
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Problems with molecular mechanics implementations on the example of 4-benzoyl-1-(4-methyl-imidazol-5-yl)-carbonylthiosemicarbazide. J Mol Model 2011; 18:843-9. [DOI: 10.1007/s00894-011-1117-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2011] [Accepted: 05/03/2011] [Indexed: 12/25/2022]
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García-Vaquero M, Miranda M, Benedito JL, Blanco-Penedo I, López-Alonso M. Effect of type of muscle and Cu supplementation on trace element concentrations in cattle meat. Food Chem Toxicol 2011; 49:1443-9. [PMID: 21443918 DOI: 10.1016/j.fct.2011.03.041] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2011] [Revised: 03/14/2011] [Accepted: 03/20/2011] [Indexed: 01/16/2023]
Abstract
Considering that meat is an important source of metals exposure to humans it is important to explore trace element concentrations in different types of muscles. Because of the demonstrated effect of Cu-supplementation on mineral status, the influence of Cu-supplementation was also evaluated. Samples of four different muscles (diaphragm, cardiac, semitendinous and pectoral, n=120) from beef calves receiving typical commercial diets Cu-supplemented (15 mg Cu(2)SO(4)/kg DM) and non-supplemented were taken and acid digested. The levels of non-essential (As, Cd, Hg, Pb and Sn) and essential (Co, Cr, Fe, Mn, Mo, Ni, Se and Zn) elements were analyzed by ICP-MS. The statistical analyzes included two way Anova, post hoc DHS Tukey and Spearman correlations. The most active and less fat containing muscles showed in general the highest essential and the lowest non-essential trace element accumulation. As and Hg muscular residues are indicative of animal exposure, however, in situations of an adequate mineral status, essential trace element concentrations in muscle are irrespective of the mineral status of the animal and could be possibly related to their own particular muscular metabolism. Cu-supplementation significantly reduced As but caused a significant decrease of Se, which could have significance for the animal's health.
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Affiliation(s)
- M García-Vaquero
- Departamento de Patoloxía Animal, Universidade de Santiago de Compostela, Lugo, Spain.
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33
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Parthasarathy S, Long F, Miller Y, Xiao Y, McElheny D, Thurber K, Ma B, Nussinov R, Ishii Y. Molecular-level examination of Cu2+ binding structure for amyloid fibrils of 40-residue Alzheimer's β by solid-state NMR spectroscopy. J Am Chem Soc 2011; 133:3390-400. [PMID: 21341665 PMCID: PMC3074258 DOI: 10.1021/ja1072178] [Citation(s) in RCA: 162] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Cu(2+) binding to Alzheimer's β (Aβ) peptides in amyloid fibrils has attracted broad attention, as it was shown that Cu ion concentration elevates in Alzheimer's senile plaque and such association of Aβ with Cu(2+) triggers the production of neurotoxic reactive oxygen species (ROS) such as H(2)O(2). However, detailed binding sites and binding structures of Cu(2+) to Aβ are still largely unknown for Aβ fibrils or other aggregates of Aβ. In this work, we examined molecular details of Cu(2+) binding to amyloid fibrils by detecting paramagnetic signal quenching in 1D and 2D high-resolution (13)C solid-state NMR (SSNMR) for full-length 40-residue Aβ(1-40). Selective quenching observed in (13)C SSNMR of Cu(2+)-bound Aβ(1-40) suggested that primary Cu(2+) binding sites in Aβ(1-40) fibrils include N(ε) in His-13 and His-14 and carboxyl groups in Val-40 as well as in Glu sidechains (Glu-3, Glu-11, and/or Glu-22). (13)C chemical shift analysis demonstrated no major structural changes upon Cu(2+) binding in the hydrophobic core regions (residues 18-25 and 30-36). Although the ROS production via oxidization of Met-35 in the presence of Cu(2+) has been long suspected, our SSNMR analysis of (13)C(ε)H(3)-S- in M35 showed little changes after Cu(2+) binding, excluding the possibility of Met-35 oxidization by Cu(2+) alone. Preliminary molecular dynamics (MD) simulations on Cu(2+)-Aβ complex in amyloid fibrils confirmed binding sites suggested by the SSNMR results and the stabilities of such bindings. The MD simulations also indicate the coexistence of a variety of Cu(2+)-binding modes unique in Aβ fibril, which are realized by both intra- and intermolecular contacts and highly concentrated coordination sites due to the in-register parallel β-sheet arrangements.
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Affiliation(s)
| | - Fei Long
- Department of Chemistry, University of Illinois at Chicago, Chicago IL 60607
| | - Yifat Miller
- Center for Cancer Research Nanobiology Program, NCI-Frederick, Frederick, MD 21702
| | - Yiling Xiao
- Department of Chemistry, University of Illinois at Chicago, Chicago IL 60607
| | - Dan McElheny
- Department of Chemistry, University of Illinois at Chicago, Chicago IL 60607
| | - Kent Thurber
- Laboratory of Chemical Physics, NIDDK, National Institutes of Health, Bethesda MD 20892
| | - Buyong Ma
- Center for Cancer Research Nanobiology Program, NCI-Frederick, Frederick, MD 21702
- Basic Science Program, SAIC-Frederick, Inc., NCI-Frederick, Frederick, MD 21702
| | - Ruth Nussinov
- Center for Cancer Research Nanobiology Program, NCI-Frederick, Frederick, MD 21702
- Sackler Inst. of Molecular Medicine, Tel Aviv University, Tel Aviv 69978, Israel
- Department of Human Genetics and Molecular Medicine Sackler School of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Yoshitaka Ishii
- Department of Chemistry, University of Illinois at Chicago, Chicago IL 60607
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Cheng LY, Long YT, Tian H, Kraatz HB. Spectroscopic and Electrochemical Investigations into the Interactions of Metal Ions with a Ferrocenoyl-Histidine Peptide Conjugate. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000658] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Matera-Witkiewicz A, Brasuń J, Cebrat M. Interactions between Ni2+ ions and tetrapeptides containing (Asp/Lys)HisGly(l/d)His sequence. Polyhedron 2010. [DOI: 10.1016/j.poly.2010.08.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Migliorini C, Witkowska D, Valensin D, Kamysz W, Kozlowski H. Competition between histamine-like and poly-imidazole coordination sites for Cu(2+) and Zn(2+) ions in zebra-fish peptide of prion-like protein. Dalton Trans 2010; 39:8663-70. [PMID: 20714613 DOI: 10.1039/c0dt00137f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The fragment of the zebrafish prion-like protein (PrP-rel-2), encompassing residues 74-86 and unprotected at N-terminus (zf74-86) represents a good model to understand Cu(2+) and Zn(2+) binding to ligands containing multi-potential metal donor sites. Zf(74-86) contains four His and His-1 N-terminal amine groups which constitute both copper and zinc anchoring sites. The presence of His at the first position additionally provides the histamine-like binding mode which could compete with the multi-His binding mode. In this study the speciation profiles of the Cu(2+) and Zn(2+) complexes with zf74-86 have been obtained. The main species, dominating at physiological pH, have been fully characterized by using different spectroscopic techniques. The detected NMR chemical shift variations and line broadening enhancements, caused by Zn(2+) and Cu(2+) respectively, allowed to determine the metal binding sites. Both metal ions showed common binding donor atoms, being 2 or 3 His imidazoles and the N-terminal group involved in Cu(2+) and Zn(2+) binding.
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Affiliation(s)
- Caterina Migliorini
- Dipartimento di Chimica, Università di Siena, Via A. Moro, 53100, Siena, Italy
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Turi I, Kállay C, Szikszai D, Pappalardo G, Di Natale G, De Bona P, Rizzarelli E, Sóvágó I. Nickel(II) complexes of the multihistidine peptide fragments of human prion protein. J Inorg Biochem 2010; 104:885-91. [DOI: 10.1016/j.jinorgbio.2010.04.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2010] [Revised: 04/16/2010] [Accepted: 04/20/2010] [Indexed: 10/19/2022]
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Józsa É, Ősz K, Kállay C, de Bona P, Damante CA, Pappalardo G, Rizzarelli E, Sóvágó I. Nickel(ii) and mixed metal complexes of amyloid-β N-terminus. Dalton Trans 2010; 39:7046-53. [DOI: 10.1039/c0dt00189a] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Zoroddu MA, Medici S, Peana M, Anedda R. NMR studies of zinc binding in a multi-histidinic peptide fragment. Dalton Trans 2009; 39:1282-94. [PMID: 20104355 DOI: 10.1039/b914296g] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A multi-histidinic peptide and its minimal models have been investigated for Zn(ii) binding. We have used NMR spectroscopy to probe the binding of zinc to the three repeats (T(1)R(2)S(3)R(4)S(5)H(6)T(7)S(8)E(9)G(10))(3) and to its mono-histidinic minimal models, the 9- and 10-aminoacid fragment. (1)H-(1)H TOCSY, (1)H-(13)C HSQC, (1)H-(1)H NOESY and (1)H-(1)H ROESY multidimensional NMR techniques were performed to understand the details of metal binding sites and the conformational behaviour of the peptides at different pH values and at different ligand to metal molar ratios. Zinc coordination involves imidazole N(delta) of His6 and carboxyl gamma-O of Glu9 residues; interaction with peptide oxygens of the His6-Thr7 or Thr7-Ser8 bonds in a tetrahedral arrangement with the minimal model peptides, cannot be excluded. Zinc coordination involves, at physiologic pH, all the three imidazole N(delta) donors of His6, His16 and His26 as well as carboxyl gamma-O of Glu residues in a tetra, penta or octahedral arrangement with the three repeats, the 30-aminoacid fragment. Zinc complexation induces important structural changes with the C-terminal portion of the ligand, constraining it to leave its disordered conformation. Our results give rise to a model of the induced structure of the peptides when bound to zinc. At high pH, amide deprotonation does not take place and hydroxo or high molecular weight polymeric species may be formed.
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