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Scheerer D, Chi H, McElheny D, Keiderling TA, Hauser K. Enhanced Sensitivity to Local Dynamics in Peptides by Use of Temperature-Jump IR Spectroscopy and Isotope Labeling. Chemistry 2020; 26:3524-3534. [PMID: 31782580 PMCID: PMC7155074 DOI: 10.1002/chem.201904497] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Indexed: 11/12/2022]
Abstract
Site-specific isotopic labeling of molecules is a widely used approach in IR spectroscopy to resolve local contributions to vibrational modes. The induced frequency shift of the corresponding IR band depends on the substituted masses, as well as on hydrogen bonding and vibrational coupling. The impact of these different factors was analyzed with a designed three-stranded β-sheet peptide and by use of selected 13 C isotope substitutions at multiple positions in the peptide backbone. Single-strand labels give rise to isotopically shifted bands at different frequencies, depending on the specific sites; this demonstrates sensitivity to the local environment. Cross-strand double- and triple-labeled peptides exhibited two resolved bands that could be uniquely assigned to specific residues, the equilibrium IR spectra of which indicated only weak local-mode coupling. Temperature-jump IR laser spectroscopy was applied to monitor structural dynamics and revealed an impressive enhancement of the isotope sensitivity to both local positions and coupling between them, relative to that of equilibrium FTIR spectroscopy. Site-specific relaxation rates were altered upon the introduction of additional cross-strand isotopes. Likewise, the rates for the global β-sheet dynamics were affected in a manner dependent on the distinct relaxation behavior of the labeled oscillator. This study reveals that isotope labels provide not only local structural probes, but rather sense the dynamic complexity of the molecular environment.
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Affiliation(s)
- David Scheerer
- Department of Chemistry, University of Konstanz, 78457, Konstanz, Germany
| | - Heng Chi
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL, USA.,Jiangsu Food and Pharmaceutical Science College, Huai'an, P.R. China
| | - Dan McElheny
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL, USA
| | | | - Karin Hauser
- Department of Chemistry, University of Konstanz, 78457, Konstanz, Germany
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Fallah MA, Gerding HR, Scheibe C, Drescher M, Karreman C, Schildknecht S, Leist M, Hauser K. Simultaneous IR-Spectroscopic Observation of α-Synuclein, Lipids, and Solvent Reveals an Alternative Membrane-Induced Oligomerization Pathway. Chembiochem 2017; 18:2312-2316. [PMID: 28980756 DOI: 10.1002/cbic.201700355] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Indexed: 12/15/2022]
Abstract
The intrinsically disordered protein α-synuclein (αS), a known pathogenic factor for Parkinson's disease, can adopt defined secondary structures when interacting with membranes or during fibrillation. The αS-lipid interaction and the implications of this process for aggregation and damage to membranes are still poorly understood. Therefore, we established a label-free infrared (IR) spectroscopic approach to allow simultaneous monitoring of αS conformation and membrane integrity. IR showed its unique sensitivity for identifying distinct β-structured aggregates. A comparative study of wild-type αS and the naturally occurring splicing variant αS Δexon3 yielded new insights into the membrane's capability for altering aggregation pathways.
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Affiliation(s)
- Mohammad A Fallah
- Department of Chemistry, University of Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
| | - Hanne R Gerding
- Department of Biology, University of Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
| | - Christian Scheibe
- Department of Chemistry, University of Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
| | - Malte Drescher
- Department of Chemistry, University of Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
| | - Christiaan Karreman
- Department of Biology, University of Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
| | - Stefan Schildknecht
- Department of Biology, University of Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
| | - Marcel Leist
- Department of Biology, University of Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
| | - Karin Hauser
- Department of Chemistry, University of Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
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Ekiz MS, Cinar G, Khalily MA, Guler MO. Self-assembled peptide nanostructures for functional materials. NANOTECHNOLOGY 2016; 27:402002. [PMID: 27578525 DOI: 10.1088/0957-4484/27/40/402002] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Nature is an important inspirational source for scientists, and presents complex and elegant examples of adaptive and intelligent systems created by self-assembly. Significant effort has been devoted to understanding these sophisticated systems. The self-assembly process enables us to create supramolecular nanostructures with high order and complexity, and peptide-based self-assembling building blocks can serve as suitable platforms to construct nanostructures showing diverse features and applications. In this review, peptide-based supramolecular assemblies will be discussed in terms of their synthesis, design, characterization and application. Peptide nanostructures are categorized based on their chemical and physical properties and will be examined by rationalizing the influence of peptide design on the resulting morphology and the methods employed to characterize these high order complex systems. Moreover, the application of self-assembled peptide nanomaterials as functional materials in information technologies and environmental sciences will be reviewed by providing examples from recently published high-impact studies.
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Affiliation(s)
- Melis Sardan Ekiz
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800 Turkey
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Popp A, Scheerer D, Chi H, Keiderling TA, Hauser K. Site‐Specific Dynamics of β‐Sheet Peptides with
D
Pro–Gly Turns Probed by Laser‐Excited Temperature‐Jump Infrared Spectroscopy. Chemphyschem 2016; 17:1273-80. [DOI: 10.1002/cphc.201501089] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Alexander Popp
- Department of Chemistry University of Konstanz 78457 Konstanz Germany), Fax: (+49) 7531-88-3139
| | - David Scheerer
- Department of Chemistry University of Konstanz 78457 Konstanz Germany), Fax: (+49) 7531-88-3139
| | - Heng Chi
- Department of Pharmacy and Health Management Jiangsu Food and Pharmaceutical Science College 4 E. Meicheng Rd. Huai'an Jiangsu Province 223003 P. R. China
| | - Timothy A. Keiderling
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor St. Chicago Illinois 60607-7061 USA
| | - Karin Hauser
- Department of Chemistry University of Konstanz 78457 Konstanz Germany), Fax: (+49) 7531-88-3139
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Kitzig S, Thilemann M, Cordes T, Rück-Braun K. Light-Switchable Peptides with a Hemithioindigo Unit: Peptide Design, Photochromism, and Optical Spectroscopy. Chemphyschem 2016; 17:1252-63. [DOI: 10.1002/cphc.201501050] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Indexed: 12/21/2022]
Affiliation(s)
- S. Kitzig
- Institut für Chemie; Technische Universität Berlin; Str. des 17. Juni 135 10623 Berlin Germany
| | - M. Thilemann
- Institut für Chemie; Technische Universität Berlin; Str. des 17. Juni 135 10623 Berlin Germany
| | - T. Cordes
- Molecular Microscopy Research Group; Zernike Institute for Advanced Materials; University of Groningen; Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Karola Rück-Braun
- Institut für Chemie; Technische Universität Berlin; Str. des 17. Juni 135 10623 Berlin Germany
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Liu H, Lin D, Sun Y, Yang L, Liu J. Cetylpyridinium Chloride Activated Trinitrotoluene Explosive Lights Up Robust and Ultrahigh Surface-Enhanced Resonance Raman Scattering in a Silver Sol. Chemistry 2013; 19:8789-96. [DOI: 10.1002/chem.201300815] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2013] [Indexed: 11/10/2022]
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Wang J, Cai K, Ma X. Ultrafast Structural Dynamics of Biomolecules Examined by Multiple-Mode 2D IR Spectroscopy: Anharmonically Coupled Motions are in Harmony. Chemphyschem 2009; 10:2242-50. [DOI: 10.1002/cphc.200900301] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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