1
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Sementilli A, Rengifo RF, Li W, Stewart AM, Stewart KL, Twahir U, Kim Y, Yue J, Mehta AK, Shearer J, Warncke K, Lynn DG. Engineering Synthetic Electron Transfer Chains from Metallopeptide Membranes. Inorg Chem 2024; 63:2899-2908. [PMID: 38127051 PMCID: PMC10865380 DOI: 10.1021/acs.inorgchem.3c02861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 11/29/2023] [Accepted: 11/30/2023] [Indexed: 12/23/2023]
Abstract
The energetic and geometric features enabling redox chemistry across the copper cupredoxin fold contain key components of electron transfer chains (ETC), which have been extended here by templating the cross-β bilayer assembly of a synthetic nonapeptide, HHQALVFFA-NH2 (K16A), with copper ions. Similar to ETC cupredoxin plastocyanin, these assemblies contain copper sites with blue-shifted (λmax 573 nm) electronic transitions and strongly oxidizing reduction potentials. Electron spin echo envelope modulation and X-ray absorption spectroscopies define square planar Cu(II) sites containing a single His ligand. Restrained molecular dynamics of the cross-β peptide bilayer architecture support metal ion coordination stabilizing the leaflet interface and indicate that the relatively high reduction potential is not simply the result of distorted coordination geometry (entasis). Cyclic voltammetry (CV) supports a charge-hopping mechanism across multiple copper centers placed 10-12 Å apart within the assembled peptide leaflet interface. This metal-templated scaffold accordingly captures the electron shuttle and cupredoxin functionality in a peptide membrane-localized electron transport chain.
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Affiliation(s)
- Anthony Sementilli
- Departments
of Chemistry, Biology, and Physics, Emory University, Atlanta, Georgia 30322, United States
| | - Rolando F. Rengifo
- Departments
of Chemistry, Biology, and Physics, Emory University, Atlanta, Georgia 30322, United States
| | - Wei Li
- Departments
of Chemistry, Biology, and Physics, Emory University, Atlanta, Georgia 30322, United States
| | - Andrew M. Stewart
- Departments
of Chemistry, Biology, and Physics, Emory University, Atlanta, Georgia 30322, United States
| | - Katie L. Stewart
- Departments
of Chemistry, Biology, and Physics, Emory University, Atlanta, Georgia 30322, United States
| | - Umar Twahir
- Departments
of Chemistry, Biology, and Physics, Emory University, Atlanta, Georgia 30322, United States
| | - Youngsun Kim
- Departments
of Chemistry, Biology, and Physics, Emory University, Atlanta, Georgia 30322, United States
| | - Jipeng Yue
- Departments
of Chemistry, Biology, and Physics, Emory University, Atlanta, Georgia 30322, United States
| | - Anil K. Mehta
- Departments
of Chemistry, Biology, and Physics, Emory University, Atlanta, Georgia 30322, United States
| | - Jason Shearer
- Department
of Chemistry, Trinity University, San Antonio, Texas 78212, United States
| | - Kurt Warncke
- Departments
of Chemistry, Biology, and Physics, Emory University, Atlanta, Georgia 30322, United States
| | - David G. Lynn
- Departments
of Chemistry, Biology, and Physics, Emory University, Atlanta, Georgia 30322, United States
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2
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Klose D, Vemulapalli SPB, Richman M, Rudnick S, Aisha V, Abayev M, Chemerovski M, Shviro M, Zitoun D, Majer K, Wili N, Goobes G, Griesinger C, Jeschke G, Rahimipour S. Cu 2+-Induced self-assembly and amyloid formation of a cyclic D,L-α-peptide: structure and function. Phys Chem Chem Phys 2022; 24:6699-6715. [PMID: 35234757 DOI: 10.1039/d1cp05415e] [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]
Abstract
In a wide spectrum of neurodegenerative diseases, self-assembly of pathogenic proteins to cytotoxic intermediates is accelerated by the presence of metal ions such as Cu2+. Only low concentrations of these early transient oligomeric intermediates are present in a mixture of species during fibril formation, and hence information on the extent of structuring of these oligomers is still largely unknown. Here, we investigate dimers as the first intermediates in the Cu2+-driven aggregation of a cyclic D,L-α-peptide architecture. The unique structural and functional properties of this model system recapitulate the self-assembling properties of amyloidogenic proteins including β-sheet conformation and cross-interaction with pathogenic amyloids. We show that a histidine-rich cyclic D,L-α-octapeptide binds Cu2+ with high affinity and selectivity to generate amyloid-like cross-β-sheet structures. By taking advantage of backbone amide methylation to arrest the self-assembly at the dimeric stage, we obtain structural information and characterize the degree of local order for the dimer. We found that, while catalytic amounts of Cu2+ promote aggregation of the peptide to fibrillar structures, higher concentrations dose-dependently reduce fibrillization and lead to formation of spherical particles, showing self-assembly to different polymorphs. For the initial self-assembly step to the dimers, we found that Cu2+ is coordinated on average by two histidines, similar to self-assembled peptides, indicating that a similar binding interface is perpetuated during Cu2+-driven oligomerization. The dimer itself is found in heterogeneous conformations that undergo dynamic exchange, leading to the formation of different polymorphs at the initial stage of the aggregation process.
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Affiliation(s)
- Daniel Klose
- Department of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zürich, Switzerland.
| | - Sahithya Phani Babu Vemulapalli
- NMR-based Structural Biology, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany. .,Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg, 26129 Oldenburg, Germany
| | - Michal Richman
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel.
| | - Safra Rudnick
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel. .,Bar-Ilan Institute for Technology and Advanced Materials (BINA), Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Vered Aisha
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel.
| | - Meital Abayev
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel.
| | - Marina Chemerovski
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel.
| | - Meital Shviro
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel. .,Bar-Ilan Institute for Technology and Advanced Materials (BINA), Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - David Zitoun
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel. .,Bar-Ilan Institute for Technology and Advanced Materials (BINA), Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Katharina Majer
- Department of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zürich, Switzerland.
| | - Nino Wili
- Department of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zürich, Switzerland.
| | - Gil Goobes
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel.
| | - Christian Griesinger
- NMR-based Structural Biology, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany.
| | - Gunnar Jeschke
- Department of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zürich, Switzerland.
| | - Shai Rahimipour
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel.
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3
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Zhang W, Christofferson AJ, Besford QA, Richardson JJ, Guo J, Ju Y, Kempe K, Yarovsky I, Caruso F. Metal-dependent inhibition of amyloid fibril formation: synergistic effects of cobalt-tannic acid networks. NANOSCALE 2019; 11:1921-1928. [PMID: 30644497 DOI: 10.1039/c8nr09221d] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Metal-phenolic networks (MPNs) have received widespread interest owing to their modular incorporation of functional metal ions and phenolic ligands. However, the interaction between MPNs and biomolecules is still relatively unexplored. Herein, we studied the effects of MPN-coated gold nanoparticles on amyloid fibril formation (which is associated with Alzheimer's disease) as a function of the metal ion in the MPN systems. All coated particles examined inhibited amyloid formation, with cobalt(ii) MPN-coated particles exhibiting the highest inhibition activity (90%). Molecular dynamics simulations and quantum mechanics calculations suggested that the geometry of the exposed cobalt coordination site in the cobalt-tannic acid networks facilitates its interactions with histidine and methionine residues in the amyloid beta peptides. Furthermore, the unique structure of cobalt MPNs may enable a wider variety of biomedical applications.
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Affiliation(s)
- Wenjie Zhang
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia.
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4
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Magrì A, La Mendola D. Copper Binding Features of Tropomyosin-Receptor-Kinase-A Fragment: Clue for Neurotrophic Factors and Metals Link. Int J Mol Sci 2018; 19:ijms19082374. [PMID: 30103559 PMCID: PMC6121459 DOI: 10.3390/ijms19082374] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 08/01/2018] [Accepted: 08/07/2018] [Indexed: 12/31/2022] Open
Abstract
The nerve growth factor (NGF) is a neurotrophin essential for the development and maintenance of neurons, whose activity is influenced by copper ions. The NGF protein exerts its action by binding to its specific receptor, TrkA. In this study, a specific domain of the TrkA receptor, region 58⁻64, was synthesized and its copper(II) complexes characterized by means of potentiometric and spectroscopic studies. The two vicinal histidine residues provide excellent metal anchoring sites and, at physiological pH, a complex with the involvement of the peptide backbone amide nitrogen is the predominant species. The TrkA peptide is competitive for metal binding with analogous peptides due to the N-terminal domain of NGF. These data provide cues for future exploration of the effect of metal ions on the activity of the NGF and its specific cellular receptor.
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Affiliation(s)
- Antonio Magrì
- Institute of Biostructures and Bioimages, National Council of Research (CNR), Via Paolo Gaifami 18, 95126 Catania, Italy.
- Consorzio Interuniversitario di Ricerca in Chimica dei Metalli nei Sistemi Biologici (CIRCMSB), via Celso Ulpiani, 27, 70125 Bari, Italy.
| | - Diego La Mendola
- Consorzio Interuniversitario di Ricerca in Chimica dei Metalli nei Sistemi Biologici (CIRCMSB), via Celso Ulpiani, 27, 70125 Bari, Italy.
- Department of Pharmacy, University of Pisa, Via Bonanno Pisano 6, 56126 Pisa, Italy.
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5
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Taran O, Chen C, Omosun TO, Hsieh MC, Rha A, Goodwin JT, Mehta AK, Grover MA, Lynn DG. Expanding the informational chemistries of life: peptide/RNA networks. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2017; 375:rsta.2016.0356. [PMID: 29133453 DOI: 10.1098/rsta.2016.0356] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/03/2017] [Indexed: 06/07/2023]
Abstract
The RNA world hypothesis simplifies the complex biopolymer networks underlining the informational and metabolic needs of living systems to a single biopolymer scaffold. This simplification requires abiotic reaction cascades for the construction of RNA, and this chemistry remains the subject of active research. Here, we explore a complementary approach involving the design of dynamic peptide networks capable of amplifying encoded chemical information and setting the stage for mutualistic associations with RNA. Peptide conformational networks are known to be capable of evolution in disease states and of co-opting metal ions, aromatic heterocycles and lipids to extend their emergent behaviours. The coexistence and association of dynamic peptide and RNA networks appear to have driven the emergence of higher-order informational systems in biology that are not available to either scaffold independently, and such mutualistic interdependence poses critical questions regarding the search for life across our Solar System and beyond.This article is part of the themed issue 'Reconceptualizing the origins of life'.
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Affiliation(s)
- Olga Taran
- Department of Chemistry, Emory University, Atlanta, GA, USA
- Department of Biology, Emory University, Atlanta, GA, USA
| | - Chenrui Chen
- Department of Chemistry, Emory University, Atlanta, GA, USA
- Department of Biology, Emory University, Atlanta, GA, USA
| | - Tolulope O Omosun
- Department of Chemistry, Emory University, Atlanta, GA, USA
- Department of Biology, Emory University, Atlanta, GA, USA
| | - Ming-Chien Hsieh
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Allisandra Rha
- Department of Chemistry, Emory University, Atlanta, GA, USA
- Department of Biology, Emory University, Atlanta, GA, USA
| | - Jay T Goodwin
- Department of Chemistry, Emory University, Atlanta, GA, USA
- Department of Biology, Emory University, Atlanta, GA, USA
| | - Anil K Mehta
- Department of Chemistry, Emory University, Atlanta, GA, USA
- Department of Biology, Emory University, Atlanta, GA, USA
| | - Martha A Grover
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - David G Lynn
- Department of Chemistry, Emory University, Atlanta, GA, USA
- Department of Biology, Emory University, Atlanta, GA, USA
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6
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Abstract
Living systems contain remarkable functional capability built within sophisticated self-organizing frameworks. Defining the assembly codes that coordinate these systems could greatly extend nanobiotechnology. To that end, we have highlighted the self-assembling architecture of the chlorosome antenna arrays and report the emulation and extension of their features for the development of cell-compatible photoredox materials. We specifically review work on amyloid peptide scaffolds able to (1) organize light-harvesting chromophores, (2) break peptide bilayer symmetry for directional energy and electron transfer, and (3) incorporate redox active metal ions at high density for energy storage.
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Affiliation(s)
- Rolando F Rengifo
- Emory University, Departments of Biology and Chemistry, 1515 Dickey Dr. NE, Atlanta, GA 30322, USA.
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7
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Rao G, Bansal S, Law WX, O’Dowd B, Dikanov SA, Oldfield E. Pulsed Electron Paramagnetic Resonance Insights into the Ligand Environment of Copper in Drosophila Lysyl Oxidase. Biochemistry 2017; 56:3770-3779. [DOI: 10.1021/acs.biochem.7b00308] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Guodong Rao
- Department of Chemistry and ‡Department of Veterinary Clinical Medicine, University of Illinois, Urbana, Illinois 61801, United States
| | - Sandhya Bansal
- Department of Chemistry and ‡Department of Veterinary Clinical Medicine, University of Illinois, Urbana, Illinois 61801, United States
| | - Wen Xuan Law
- Department of Chemistry and ‡Department of Veterinary Clinical Medicine, University of Illinois, Urbana, Illinois 61801, United States
| | - Bing O’Dowd
- Department of Chemistry and ‡Department of Veterinary Clinical Medicine, University of Illinois, Urbana, Illinois 61801, United States
| | - Sergei A. Dikanov
- Department of Chemistry and ‡Department of Veterinary Clinical Medicine, University of Illinois, Urbana, Illinois 61801, United States
| | - Eric Oldfield
- Department of Chemistry and ‡Department of Veterinary Clinical Medicine, University of Illinois, Urbana, Illinois 61801, United States
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8
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Yugay D, Goronzy DP, Kawakami LM, Claridge SA, Song TB, Yan Z, Xie YH, Gilles J, Yang Y, Weiss PS. Copper Ion Binding Site in β-Amyloid Peptide. NANO LETTERS 2016; 16:6282-6289. [PMID: 27616333 DOI: 10.1021/acs.nanolett.6b02590] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
β-Amyloid aggregates in the brain play critical roles in Alzheimer's disease, a chronic neurodegenerative condition. Amyloid-associated metal ions, particularly zinc and copper ions, have been implicated in disease pathogenesis. Despite the importance of such ions, the binding sites on the β-amyloid peptide remain poorly understood. In this study, we use scanning tunneling microscopy, circular dichroism, and surface-enhanced Raman spectroscopy to probe the interactions between Cu2+ ions and a key β-amyloid peptide fragment, consisting of the first 16 amino acids, and define the copper-peptide binding site. We observe that in the presence of Cu2+, this peptide fragment forms β-sheets, not seen without the metal ion. By imaging with scanning tunneling microscopy, we are able to identify the binding site, which involves two histidine residues, His13 and His14. We conclude that the binding of copper to these residues creates an interstrand histidine brace, which enables the formation of β-sheets.
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Affiliation(s)
- Diana Yugay
- California NanoSystems Institute, University of California, Los Angeles , Los Angeles, California 90095, United States
- Department of Chemistry and Biochemistry, University of California, Los Angeles , Los Angeles, California 90095, United States
| | - Dominic P Goronzy
- California NanoSystems Institute, University of California, Los Angeles , Los Angeles, California 90095, United States
- Department of Chemistry and Biochemistry, University of California, Los Angeles , Los Angeles, California 90095, United States
| | - Lisa M Kawakami
- Department of Chemistry and Biochemistry, University of California, Los Angeles , Los Angeles, California 90095, United States
| | - Shelley A Claridge
- Department of Chemistry and Biochemistry, University of California, Los Angeles , Los Angeles, California 90095, United States
| | - Tze-Bin Song
- Department of Materials Science and Engineering, University of California, Los Angeles , Los Angeles, California 90095, United States
| | - Zhongbo Yan
- Department of Materials Science and Engineering, University of California, Los Angeles , Los Angeles, California 90095, United States
| | - Ya-Hong Xie
- California NanoSystems Institute, University of California, Los Angeles , Los Angeles, California 90095, United States
- Department of Materials Science and Engineering, University of California, Los Angeles , Los Angeles, California 90095, United States
| | - Jérôme Gilles
- Department of Mathematics and Statistics, San Diego State University , San Diego, California 92182, United States
| | - Yang Yang
- California NanoSystems Institute, University of California, Los Angeles , Los Angeles, California 90095, United States
- Department of Materials Science and Engineering, University of California, Los Angeles , Los Angeles, California 90095, United States
| | - Paul S Weiss
- California NanoSystems Institute, University of California, Los Angeles , Los Angeles, California 90095, United States
- Department of Chemistry and Biochemistry, University of California, Los Angeles , Los Angeles, California 90095, United States
- Department of Materials Science and Engineering, University of California, Los Angeles , Los Angeles, California 90095, United States
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9
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Copper(II) and nickel(II) binding sites of peptide containing adjacent histidyl residues. J Inorg Biochem 2015; 151:87-93. [DOI: 10.1016/j.jinorgbio.2015.06.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 05/04/2015] [Accepted: 06/26/2015] [Indexed: 11/18/2022]
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10
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Liu L, Mayo DJ, Sahu ID, Zhou A, Zhang R, McCarrick RM, Lorigan GA. Determining the Secondary Structure of Membrane Proteins and Peptides Via Electron Spin Echo Envelope Modulation (ESEEM) Spectroscopy. Methods Enzymol 2015; 564:289-313. [PMID: 26477255 DOI: 10.1016/bs.mie.2015.06.037] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Revealing detailed structural and dynamic information of membrane embedded or associated proteins is challenging due to their hydrophobic nature which makes NMR and X-ray crystallographic studies challenging or impossible. Electron paramagnetic resonance (EPR) has emerged as a powerful technique to provide essential structural and dynamic information for membrane proteins with no size limitations in membrane systems which mimic their natural lipid bilayer environment. Therefore, tremendous efforts have been devoted toward the development and application of EPR spectroscopic techniques to study the structure of biological systems such as membrane proteins and peptides. This chapter introduces a novel approach established and developed in the Lorigan lab to investigate membrane protein and peptide local secondary structures utilizing the pulsed EPR technique electron spin echo envelope modulation (ESEEM) spectroscopy. Detailed sample preparation strategies in model membrane protein systems and the experimental setup are described. Also, the ability of this approach to identify local secondary structure of membrane proteins and peptides with unprecedented efficiency is demonstrated in model systems. Finally, applications and further developments of this ESEEM approach for probing larger size membrane proteins produced by overexpression systems are discussed.
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Affiliation(s)
- Lishan Liu
- Department of Chemistry and Biochemistry, Miami University, Oxford, Ohio, USA.
| | - Daniel J Mayo
- Department of Chemistry and Biochemistry, Miami University, Oxford, Ohio, USA
| | - Indra D Sahu
- Department of Chemistry and Biochemistry, Miami University, Oxford, Ohio, USA
| | - Andy Zhou
- Department of Chemistry and Biochemistry, Miami University, Oxford, Ohio, USA
| | - Rongfu Zhang
- Department of Chemistry and Biochemistry, Miami University, Oxford, Ohio, USA
| | - Robert M McCarrick
- Department of Chemistry and Biochemistry, Miami University, Oxford, Ohio, USA
| | - Gary A Lorigan
- Department of Chemistry and Biochemistry, Miami University, Oxford, Ohio, USA
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11
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Cunningham TF, Putterman MR, Desai A, Horne WS, Saxena S. The double-histidine Cu²⁺-binding motif: a highly rigid, site-specific spin probe for electron spin resonance distance measurements. Angew Chem Int Ed Engl 2015; 54:6330-4. [PMID: 25821033 DOI: 10.1002/anie.201501968] [Citation(s) in RCA: 117] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Indexed: 11/07/2022]
Abstract
The development of ESR methods that measure long-range distance distributions has advanced biophysical research. However, the spin labels commonly employed are highly flexible, which leads to ambiguity in relating ESR measurements to protein-backbone structure. Herein we present the double-histidine (dHis) Cu(2+)-binding motif as a rigid spin probe for double electron-electron resonance (DEER) distance measurements. The spin label is assembled in situ from natural amino acid residues and a metal salt, requires no postexpression synthetic modification, and provides distance distributions that are dramatically narrower than those found with the commonly used protein spin label. Simple molecular modeling based on an X-ray crystal structure of an unlabeled protein led to a predicted most probable distance within 0.5 Å of the experimental value. Cu(2+) DEER with the dHis motif shows great promise for the resolution of precise, unambiguous distance constraints that relate directly to protein-backbone structure and flexibility.
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Affiliation(s)
- Timothy F Cunningham
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA 15260 (USA)
| | - Miriam R Putterman
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA 15260 (USA)
| | - Astha Desai
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA 15260 (USA)
| | - W Seth Horne
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA 15260 (USA).
| | - Sunil Saxena
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA 15260 (USA).
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12
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Cunningham TF, Putterman MR, Desai A, Horne WS, Saxena S. The Double-Histidine Cu2+-Binding Motif: A Highly Rigid, Site-Specific Spin Probe for Electron Spin Resonance Distance Measurements. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201501968] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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13
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Zou R, Wang Q, Wu J, Wu J, Schmuck C, Tian H. Peptide self-assembly triggered by metal ions. Chem Soc Rev 2015; 44:5200-19. [DOI: 10.1039/c5cs00234f] [Citation(s) in RCA: 183] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
This review summarizes the recent development of structures, functions, as well as strategies of a peptide self-assembly induced by metal ions.
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Affiliation(s)
- Rongfeng Zou
- Key Lab for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Qi Wang
- College of Public Health
- Nantong University
- Nantong 226019
- China
| | - Junchen Wu
- Key Lab for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Jingxian Wu
- Key Lab for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Carsten Schmuck
- Institute for Organic Chemistry
- University of Duisburg-Essen
- Essen 45117
- Germany
| | - He Tian
- Key Lab for Advanced Materials and Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- China
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14
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Silva KI, Michael BC, Geib SJ, Saxena S. ESEEM analysis of multi-histidine Cu(II)-coordination in model complexes, peptides, and amyloid-β. J Phys Chem B 2014; 118:8935-44. [PMID: 25014537 PMCID: PMC4120975 DOI: 10.1021/jp500767n] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
We validate the use of ESEEM to predict the number of (14)N nuclei coupled to a Cu(II) ion by the use of model complexes and two small peptides with well-known Cu(II) coordination. We apply this method to gain new insight into less explored aspects of Cu(II) coordination in amyloid-β (Aβ). Aβ has two coordination modes of Cu(II) at physiological pH. A controversy has existed regarding the number of histidine residues coordinated to the Cu(II) ion in component II, which is dominant at high pH (∼8.7) values. Importantly, with an excess amount of Zn(II) ions, as is the case in brain tissues affected by Alzheimer's disease, component II becomes the dominant coordination mode, as Zn(II) selectively substitutes component I bound to Cu(II). We confirm that component II only contains single histidine coordination, using ESEEM and set of model complexes. The ESEEM experiments carried out on systematically (15)N-labeled peptides reveal that, in component II, His 13 and His 14 are more favored as equatorial ligands compared to His 6. Revealing molecular level details of subcomponents in metal ion coordination is critical in understanding the role of metal ions in Alzheimer's disease etiology.
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Affiliation(s)
- K Ishara Silva
- Department of Chemistry, University of Pittsburgh , Pittsburgh, Pennsylvania 15260, United States
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