1
|
Murgida DH. In Situ Spectroelectrochemical Investigations of Electrode-Confined Electron-Transferring Proteins and Redox Enzymes. ACS OMEGA 2021; 6:3435-3446. [PMID: 33585730 PMCID: PMC7876673 DOI: 10.1021/acsomega.0c05746] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 01/19/2021] [Indexed: 06/09/2023]
Abstract
This perspective analyzes recent advances in the spectroelectrochemical investigation of redox proteins and enzymes immobilized on biocompatible or biomimetic electrode surfaces. Specifically, the article highlights new insights obtained by surface-enhanced resonance Raman (SERR), surface-enhanced infrared absorption (SEIRA), protein film infrared electrochemistry (PFIRE), polarization modulation infrared reflection-absorption spectroscopy (PMIRRAS), Förster resonance energy transfer (FRET), X-ray absorption spectroscopy (XAS), electron paramagnetic resonance (EPR), and differential electrochemical mass spectrometry (DMES)-based spectroelectrochemical methods on the structure, orientation, dynamics, and reaction mechanisms for a variety of immobilized species. This includes small heme and copper electron shuttling proteins, large respiratory complexes, hydrogenases, multicopper oxidases, alcohol dehydrogenases, endonucleases, NO-reductases, and dye decolorizing peroxidases, among other enzymes. Finally, I discuss the challenges and foreseeable future developments toward a better understanding of the functioning of these complex macromolecules and their exploitation in technological devices.
Collapse
Affiliation(s)
- Daniel H. Murgida
- Departamento
de Química Inorgánica, Analítica y Química-Física,
Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos
Aires 1428, Argentina
- Instituto
de Química Física de los Materiales, Medio Ambiente
y Energía (INQUIMAE), CONICET-Universidad de Buenos Aires, Buenos Aires C1428EHA, Argentina
| |
Collapse
|
2
|
Abstract
Multivariate analysis (MA) is becoming a fundamental tool for processing in an efficient way the large amount of data collected in X-ray diffraction experiments. Multi-wedge data collections can increase the data quality in case of tiny protein crystals; in situ or operando setups allow investigating changes on powder samples occurring during repeated fast measurements; pump and probe experiments at X-ray free-electron laser (XFEL) sources supply structural characterization of fast photo-excitation processes. In all these cases, MA can facilitate the extraction of relevant information hidden in data, disclosing the possibility of automatic data processing even in absence of a priori structural knowledge. MA methods recently used in the field of X-ray diffraction are here reviewed and described, giving hints about theoretical background and possible applications. The use of MA in the framework of the modulated enhanced diffraction technique is described in detail.
Collapse
|
3
|
Baumgartner B, Freitag S, Lendl B. 3D Printing for Low-Cost and Versatile Attenuated Total Reflection Infrared Spectroscopy. Anal Chem 2020; 92:4736-4741. [DOI: 10.1021/acs.analchem.9b04043] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Bettina Baumgartner
- Institute of Chemical Technologies and Analytics, Technische Universität Wien, Getreidemarkt 9/E164, 1060 Wien, Austria
| | - Stephan Freitag
- Institute of Chemical Technologies and Analytics, Technische Universität Wien, Getreidemarkt 9/E164, 1060 Wien, Austria
| | - Bernhard Lendl
- Institute of Chemical Technologies and Analytics, Technische Universität Wien, Getreidemarkt 9/E164, 1060 Wien, Austria
| |
Collapse
|
4
|
Alcaráz MR, Schwaighofer A, Goicoechea H, Lendl B. Application of MCR-ALS to reveal intermediate conformations in the thermally induced α-β transition of poly-l-lysine monitored by FT-IR spectroscopy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 185:304-309. [PMID: 28599234 DOI: 10.1016/j.saa.2017.05.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 05/02/2017] [Accepted: 05/04/2017] [Indexed: 06/07/2023]
Abstract
Temperature-induced conformational transitions of poly-l-lysine were monitored with Fourier-transform infrared (FT-IR) spectroscopy between 10°C and 70°C. Chemometric analysis of dynamic IR spectra was performed by multivariate curve analysis-alternating least squares (MCR-ALS) of the amide I' and amide II' spectral region. With this approach, the pure spectral and concentration profiles of the conformational transition were obtained. Beside the initial α-helical, the intermediate random coil/extended helices and the final β-sheet structure, an additional intermediate PLL conformation was identified and attributed to a transient β-sheet structure.
Collapse
Affiliation(s)
- Mirta R Alcaráz
- Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9/164-UPA, 1060 Vienna, Austria; Laboratorio de Desarrollo Analítico y Quimiometría, FBCB, Universidad Nacional del Litoral-CONICET, Ciudad Universitaria, 3000 Santa Fe, Argentina
| | - Andreas Schwaighofer
- Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9/164-UPA, 1060 Vienna, Austria
| | - Héctor Goicoechea
- Laboratorio de Desarrollo Analítico y Quimiometría, FBCB, Universidad Nacional del Litoral-CONICET, Ciudad Universitaria, 3000 Santa Fe, Argentina
| | - Bernhard Lendl
- Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9/164-UPA, 1060 Vienna, Austria.
| |
Collapse
|
5
|
Müller P, Hermans I. Applications of Modulation Excitation Spectroscopy in Heterogeneous Catalysis. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.6b04855] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Philipp Müller
- Department of Chemistry & Department of Chemical Engineering, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Ive Hermans
- Department of Chemistry & Department of Chemical Engineering, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| |
Collapse
|
6
|
Kinetics of cytochrome c oxidase from R. sphaeroides initiated by direct electron transfer followed by tr-SEIRAS. Bioelectrochemistry 2016; 112:1-8. [PMID: 27398977 DOI: 10.1016/j.bioelechem.2016.06.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 06/18/2016] [Accepted: 06/24/2016] [Indexed: 11/20/2022]
Abstract
Time-resolved surface-enhanced IR-absorption spectroscopy (tr-SEIRAS) has been performed on cytochrome c oxidase from Rhodobacter sphaeroides. The enzyme was converted electrochemically into the fully reduced state. Thereafter, in the presence of oxygen, the potential was switched to open circuit potential (OCP). Under these conditions, the enzyme is free to undergo enzymatic oxidation in the absence of an external electric field. Tr-SEIRAS was performed using the step-scan technique, triggered by periodic potential pulses switching between - 800mV and OCP. Single bands were resolved in a broad band in the amide I region using phase sensitive detection. Amplitudes of these bands were analyzed as a function of time. Time constants in the ms time scale were considered in terms of conformational changes of the protein secondary structures associated with the enzymatic turnover of the protein.
Collapse
|
7
|
Naumann RLC, Geiss AF, Steininger C, Knoll W. Biomimetic Membranes for Multi-Redox Center Proteins. Int J Mol Sci 2016; 17:330. [PMID: 26950120 PMCID: PMC4813192 DOI: 10.3390/ijms17030330] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Revised: 11/27/2015] [Accepted: 02/17/2016] [Indexed: 11/22/2022] Open
Abstract
His-tag technology was applied for biosensing purposes involving multi-redox center proteins (MRPs). An overview is presented on various surfaces ranging from flat to spherical and modified with linker molecules with nitrile-tri-acetic acid (NTA) terminal groups to bind his-tagged proteins in a strict orientation. The bound proteins are submitted to in situ dialysis in the presence of lipid micelles to form a so-called protein-tethered bilayer lipid membrane (ptBLM). MRPs, such as the cytochrome c oxidase (CcO) from R. sphaeroides and P. denitrificans, as well as photosynthetic reactions centers (RCs) from R. sphaeroides, were thus investigated. Electrochemical and surface-sensitive optical techniques, such as surface plasmon resonance, surface plasmon-enhanced fluorescence, surface-enhanced infrared absorption spectroscopy (SEIRAS) and surface-enhanced resonance Raman spectroscopy (SERRS), were employed in the case of the ptBLM structure on flat surfaces. Spherical particles ranging from µm size agarose gel beads to nm size nanoparticles modified in a similar fashion were called proteo-lipobeads (PLBs). The particles were investigated by laser-scanning confocal fluorescence microscopy (LSM) and UV/Vis spectroscopy. Electron and proton transfer through the proteins were demonstrated to take place, which was strongly affected by the membrane potential. MRPs can thus be used for biosensing purposes under quasi-physiological conditions.
Collapse
Affiliation(s)
- Renate L C Naumann
- Austrian Institute of Technology GmbH, AIT, Donau-City-Str. 1, 1220 Vienna, Austria.
| | - Andreas F Geiss
- Austrian Institute of Technology GmbH, AIT, Donau-City-Str. 1, 1220 Vienna, Austria.
| | - Christoph Steininger
- Austrian Institute of Technology GmbH, AIT, Donau-City-Str. 1, 1220 Vienna, Austria.
| | - Wolfgang Knoll
- Austrian Institute of Technology GmbH, AIT, Donau-City-Str. 1, 1220 Vienna, Austria.
| |
Collapse
|
8
|
Wang F, Liu C, Lu W, Wang J, Ye Y. In situ Raman spectroscopic observation of the temperature-dependent partition of CH4 and CO2 during the growth of double hydrate from aqueous solution. CAN J CHEM 2015. [DOI: 10.1139/cjc-2014-0550] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Sequestration of CO2 in hydrate form within deep oceanic sediments, to simultaneously replace methane trapped in submarine hydrate, has been considered as an efficient method for CO2 reduction. Consequently, research efforts are underway to deeply understand the properties of CH4 and CO2 hydrates. In this work, CH4 + CO2 double hydrate crystals were grown from aqueous solution in a capillary high-pressure optical cell. The quantitative relationships between Raman intensity and dissolved gas (i.e., CH4 and CO2) concentration in water and in hydrate were established. The partition coefficients of CH4 and CO2 between the hydrate and aqueous phases were measured at 5 constant temperatures from 275.15 to 293.15 K. The equilibrium concentrations of dissolved CH4 and CO2 decrease with decreasing temperatures, indicating more dissolved CH4 and CO2 will be transferred from the aqueous to the hydrate phase at lower temperature. With decreasing temperature, the molality of CO2 in hydrate increases and the molality of CH4 in 51262 cavities decreases, while the sum of the molality of CH4 in 51262 cavities and molality of CO2 in hydrate keeps constant, indicating that CO2 molecules can replace more methane molecules under lower temperature only by occupying the 51262 cavities.
Collapse
Affiliation(s)
- Feifei Wang
- State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, P. R. China
- Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, P. R. China
- Key Laboratory of Gas Hydrate, Ministry of Land and Resources, Qingdao Institute of Marine Geology, Qingdao 266071, P. R. China
| | - Changling Liu
- Key Laboratory of Gas Hydrate, Ministry of Land and Resources, Qingdao Institute of Marine Geology, Qingdao 266071, P. R. China
| | - Wanjun Lu
- State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, P. R. China
- Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences, Wuhan 430074, P. R. China
| | - Jiasheng Wang
- Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, P. R. China
| | - Yuguang Ye
- Key Laboratory of Gas Hydrate, Ministry of Land and Resources, Qingdao Institute of Marine Geology, Qingdao 266071, P. R. China
| |
Collapse
|
9
|
Time-resolved surface-enhanced IR-absorption spectroscopy of direct electron transfer to cytochrome c oxidase from R. sphaeroides. Biophys J 2014; 105:2706-13. [PMID: 24359742 DOI: 10.1016/j.bpj.2013.10.037] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 10/07/2013] [Accepted: 10/10/2013] [Indexed: 11/20/2022] Open
Abstract
Time-resolved surface-enhanced IR-absorption spectroscopy triggered by electrochemical modulation has been performed on cytochrome c oxidase from Rhodobacter sphaeroides. Single bands isolated from a broad band in the amide I region using phase-sensitive detection were attributed to different redox centers. Their absorbances changing on the millisecond timescale could be fitted to a model based on protonation-dependent chemical reaction kinetics established previously. Substantial conformational changes of secondary structures coupled to redox transitions were revealed.
Collapse
|
10
|
Srajer J, Schwaighofer A, Ramer G, Rotter S, Guenay B, Kriegner A, Knoll W, Lendl B, Nowak C. Double-layered nanoparticle stacks for surface enhanced infrared absorption spectroscopy. NANOSCALE 2014; 6:127-131. [PMID: 24189636 DOI: 10.1039/c3nr04726a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We demonstrate that double-layered stacks of gold and insulator nanoparticles arranged on a flat gold surface dramatically enhance the sensitivity in absorption infrared microscopy. Through morphological variations of the nanoparticles, the frequency of the plasmon resonances can be tuned to match the frequency of the molecular vibration in the mid-infrared region. The results show that the nanostructures enhance the absorption signal of the molecules by a factor of up to ~2.2 × 10(6), while preserving their characteristic line-shape remarkably well.
Collapse
Affiliation(s)
- Johannes Srajer
- Austrian Institute of Technology GmbH, AIT, Donau-City Str. 1, 1220 Vienna, Austria.
| | | | | | | | | | | | | | | | | |
Collapse
|