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Petrovszki D, Valkai S, Kelemen L, Nagy L, Agarwal V, Krekic S, Zimányi L, Dér A. Microsecond All-Optical Modulation by Biofunctionalized Porous Silicon Microcavity. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2070. [PMID: 37513080 PMCID: PMC10385878 DOI: 10.3390/nano13142070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 07/11/2023] [Accepted: 07/12/2023] [Indexed: 07/30/2023]
Abstract
We successfully created a composite photonic structure out of porous silicon (PSi) microcavities doped by the photochromic protein, photoactive yellow protein (PYP). Massive incorporation of the protein molecules into the pores was substantiated by a 30 nm shift of the resonance dip upon functionalization, and light-induced reflectance changes of the device due to the protein photocycle were recorded. Model calculations for the photonic properties of the device were consistent with earlier results on the nonlinear optical properties of the protein, whose degree of incorporation into the PSi structure was also estimated. The successful proof-of-concept results are discussed in light of possible practical applications in the future.
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Affiliation(s)
- Dániel Petrovszki
- Institute of Biophysics, Biological Research Centre, Eötvös Loránd Research Network, 6726 Szeged, Hungary
- Doctoral School of Multidisciplinary Medical Science, University of Szeged, 6720 Szeged, Hungary
| | - Sándor Valkai
- Institute of Biophysics, Biological Research Centre, Eötvös Loránd Research Network, 6726 Szeged, Hungary
| | - Lóránd Kelemen
- Institute of Biophysics, Biological Research Centre, Eötvös Loránd Research Network, 6726 Szeged, Hungary
| | - László Nagy
- Department of Medical Physics and Informatics, Faculty of Science and Informatics, Albert Szent-Györgyi Medical School, University of Szeged, 6720 Szeged, Hungary
- Institute of Plant Biology, Biological Research Centre, Eötvös Loránd Research Network, 6726 Szeged, Hungary
| | - Vivechana Agarwal
- Centro de Investigación en Ingeniería y Ciencias Aplicadas-IICBA, Universidad Autónoma del Estado de Morelos, Cuernavaca 62209, Morelos, Mexico
| | - Szilvia Krekic
- Institute of Biophysics, Biological Research Centre, Eötvös Loránd Research Network, 6726 Szeged, Hungary
- Doctoral School of Multidisciplinary Medical Science, University of Szeged, 6720 Szeged, Hungary
| | - László Zimányi
- Institute of Biophysics, Biological Research Centre, Eötvös Loránd Research Network, 6726 Szeged, Hungary
| | - András Dér
- Institute of Biophysics, Biological Research Centre, Eötvös Loránd Research Network, 6726 Szeged, Hungary
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Krekic S, Mero M, Kuhl M, Balasubramanian K, Dér A, Heiner Z. Photoactive Yellow Protein Adsorption at Hydrated Polyethyleneimine and Poly-l-Glutamic Acid Interfaces. Molecules 2023; 28:molecules28104077. [PMID: 37241818 DOI: 10.3390/molecules28104077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 05/07/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023] Open
Abstract
Chiral and achiral vibrational sum-frequency generation (VSFG) spectroscopy was performed in the 1400-1700 and 2800-3800 cm-1 range to study the interfacial structure of photoactive yellow protein (PYP) adsorbed on polyethyleneimine (PEI) and poly-l-glutamic acid (PGA) surfaces. Nanometer-thick polyelectrolyte layers served as the substrate for PYP adsorption, with 6.5-pair layers providing the most homogeneous surfaces. When the topmost material was PGA, it acquired a random coil structure with a small number of β2-fibrils. Upon adsorption on oppositely charged surfaces, PYP yielded similar achiral spectra. However, the VSFG signal intensity increased for PGA surfaces with a concomitant redshift of the chiral Cα-H and N-H stretching bands, suggesting increased adsorption for PGA compared to PEI. At low wavenumbers, both the backbone and the side chains of PYP induced drastic changes to all measured chiral and achiral VSFG spectra. Decreasing ambient humidity led to the loss of tertiary structure with a re-orientation of α-helixes, evidenced by a strongly blue-shifted chiral amide I band of the β-sheet structure with a shoulder at 1654 cm-1. Our observations indicate that chiral VSFG spectroscopy is not only capable of determining the main type of secondary structure of PYP, i.e., β-scaffold, but is also sensitive to tertiary protein structure.
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Affiliation(s)
- Szilvia Krekic
- School of Analytical Sciences Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
- Institute of Biophysics, Biological Research Centre, 6726 Szeged, Hungary
- Doctoral School of Multidisciplinary Medical Sciences, University of Szeged, 6720 Szeged, Hungary
| | - Mark Mero
- Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, 12489 Berlin, Germany
| | - Michel Kuhl
- School of Analytical Sciences Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
- Department of Chemistry and IRIS Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
| | - Kannan Balasubramanian
- School of Analytical Sciences Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
- Department of Chemistry and IRIS Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
| | - András Dér
- Institute of Biophysics, Biological Research Centre, 6726 Szeged, Hungary
| | - Zsuzsanna Heiner
- School of Analytical Sciences Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
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All-Optical Switching Demonstrated with Photoactive Yellow Protein Films. BIOSENSORS 2021; 11:bios11110432. [PMID: 34821648 PMCID: PMC8615624 DOI: 10.3390/bios11110432] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 10/19/2021] [Accepted: 10/28/2021] [Indexed: 12/02/2022]
Abstract
Integrated optics (IO) is a field of photonics which focuses on manufacturing circuits similar to those in integrated electronics, but that work on an optical basis to establish means of faster data transfer and processing. Currently, the biggest task in IO is finding or manufacturing materials with the proper nonlinear optical characteristics to implement as active components in IO circuits. Using biological materials in IO has recently been proposed, the first material to be investigated for this purpose being the protein bacteriorhodopsin; however, since then, other proteins have also been considered, such as the photoactive yellow protein (PYP). In our current work, we directly demonstrate the all-optical switching capabilities of PYP films combined with an IO Mach–Zehnder interferometer (MZI) for the first time. By exploiting photoreactions in the reaction cycle of PYP, we also show how a combination of exciting light beams can introduce an extra degree of freedom to control the operation of the device. Based on our results, we discuss how the special advantages of PYP can be utilized in future IO applications.
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