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Kato Y, Yoshida K, Ohba Y, Fujimoto I, Imahara Y, Nakachi S, Nakashima K, Shioji K, Yamaguchi T. Different properties of two types of red fluorescent proteins in octocoral, Scleronephthya spp. as Akane families. LUMINESCENCE 2022; 37:2074-2082. [PMID: 36227762 DOI: 10.1002/bio.4394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 07/14/2022] [Accepted: 07/18/2022] [Indexed: 12/14/2022]
Abstract
We report the different properties of two types of red fluorescent proteins (RFP), undescribed species, extracted from two octocorals, Scleronephthya sp. 1 (S. sp. 1) and S. sp, 2 (Alcyonacea, Nephtheidae). S. sp. 1, named Alc-Orange, emits strong green emission at 492 nm and weak red emission at 590 and 630 nm when excited at 449 and 574 nm, respectively. S. sp. 2, LS-Red, emits strong deep red at 642 nm and weak green at 480 and 510 nm when excited at 574 nm and 434 nm, respectively. LS-Red has a very large Stokes shift of about 208 nm emitting at 642 nm when excited at 434 nm. Interestingly, LS-Red shows some emissions at 480 (blue emission), 514 (green emission), 563 (orange emission), and 642 nm (deep red emission) continuously at pH 7.5, which means multicolored fluorescence protein by one excitation at 434 nm. In pH dependence of fluorescence of Alc-Orange (pH 13 to 3.5), no relation between 'green and red FPs' was observed, whereas LS-Red showed the interconversion between 'green and red forms' depending on pH (11.5 to 4.5).
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Affiliation(s)
- Yuko Kato
- Department of Chemistry, Faculty of Science, Fukuoka University, Nanakuma, Jonan, Fukuoka, Japan.,Research Center for Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Nagasaki International University, Nagasaki, Japan.,Biological Institute on Kuroshio, Kochi, Japan
| | - Koji Yoshida
- Department of Chemistry, Faculty of Science, Fukuoka University, Nanakuma, Jonan, Fukuoka, Japan
| | - Yoshihito Ohba
- Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Nagasaki International University, Nagasaki, Japan
| | - Ikki Fujimoto
- Department of Life, Environmental, and Materials Science, Faculty of Engineering, Fukuoka Institute of Technology, Fukuoka, Japan
| | - Yukimitsu Imahara
- Wakayama Laboratory, Biological Institute on Kuroshio, Wakayama, Japan.,Octocoral Research Laboratory, Wakayama, Japan
| | - Shu Nakachi
- Biological Institute on Kuroshio, Kochi, Japan.,Natural History Laboratory, Kochi, Japan
| | - Kenichiro Nakashima
- Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Nagasaki International University, Nagasaki, Japan
| | - Kosei Shioji
- Department of Chemistry, Faculty of Science, Fukuoka University, Nanakuma, Jonan, Fukuoka, Japan
| | - Toshio Yamaguchi
- Department of Chemistry, Faculty of Science, Fukuoka University, Nanakuma, Jonan, Fukuoka, Japan
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Laschuk NO, Ahmad R, Ebralidze II, Poisson J, Easton EB, Zenkina OV. Multichromic Monolayer Terpyridine-Based Electrochromic Materials. ACS Appl Mater Interfaces 2020; 12:41749-41757. [PMID: 32870639 DOI: 10.1021/acsami.0c11478] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The article describes novel electrochromic materials (ECMs) that are based on a monolayer consisting of two or three isostructural metal complexes of 4'-(pyridin-4-yl)-2,2':6',2''-terpyridine simultaneously deposited on surface-enhanced support. The support was made by screen printing of indium tin oxide (ITO) nanoparticles on ITO-glass and has a surface area sufficient for a monolayer to give color visible to the naked eye. The ability to separately electrochemically address the oxidation state of the metal centers on the surface (i.e., Co2+/Co3+, Os2+/Os3+, and Fe2+/Fe3+) provides an opportunity to achieve several distinct color-to-color transitions, thus opening the door for constructing monolayer-based multicolor ECMs.
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Affiliation(s)
- Nadia O Laschuk
- Faculty of Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
| | - Rana Ahmad
- Faculty of Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
| | - Iraklii I Ebralidze
- Faculty of Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
| | - Jade Poisson
- Faculty of Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
| | - E Bradley Easton
- Faculty of Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
| | - Olena V Zenkina
- Faculty of Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
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