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Jimbo M, Otake M, Amano H, Yasumoto K, Watabe S, Okada D, Kumagai H. Characterization of recombinant photoconverting green fluorescent Akanes. J Biochem 2023; 175:25-34. [PMID: 37812399 DOI: 10.1093/jb/mvad078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 09/13/2023] [Accepted: 09/19/2023] [Indexed: 10/10/2023] Open
Abstract
Akanes are fluorescent proteins that have several fluorescence maxima. In this report, Akane1 and Akane3 from Scleronephthya gracillima were selected, successfully overexpressed in Escherichia coli and purified by affinity chromatography. Fluorescence spectra of the recombinant Akanes matured in darkness, or ambient light were found to have several fluorescence peaks. SDS-PAGE analysis revealed that Akanes matured in ambient light have two fragments. MS/MS analysis of Akanes digested with trypsin showed that the cleavage site is the same as observed for the photoconvertible fluorescent protein Kaede. The differences between the calculated masses from the amino acid sequence of Akane1 and the measured masses of Akane1 fragments obtained under ambient light coincided with those of Kaede. In contrast, a mass difference between the measured N-terminal Akane3 fragment and the calculated mass indicated that Akane3 is modified in the N-terminal region. These results indicate that numerous peaks in the fluorescent spectra of Akanes partly arise from isoproteins of Akanes and photoconversion. Photoconversion of Akane1 caused a fluorescence change from green to red, which was also observed for Akane3; however, the fluorescent intensity decreased dramatically when compared with that of Akane3.
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Affiliation(s)
- Mitsuru Jimbo
- School of Marine Biosciences, Kitasato University. 1-15-1, Kitasato, Sagamihara, Kanagawa 252-0373, Japan
| | - Mayumi Otake
- School of Marine Biosciences, Kitasato University. 1-15-1, Kitasato, Sagamihara, Kanagawa 252-0373, Japan
| | - Haruna Amano
- School of Marine Biosciences, Kitasato University. 1-15-1, Kitasato, Sagamihara, Kanagawa 252-0373, Japan
| | - Ko Yasumoto
- School of Marine Biosciences, Kitasato University. 1-15-1, Kitasato, Sagamihara, Kanagawa 252-0373, Japan
| | - Shugo Watabe
- School of Marine Biosciences, Kitasato University. 1-15-1, Kitasato, Sagamihara, Kanagawa 252-0373, Japan
| | - Daisuke Okada
- School of Medicine, Kitasato University. 1-15-1, Kitasato, Sagamihara, Kanagawa 252-0373, Japan
| | - Hiroshi Kumagai
- School of Allied Health Sciences, Kitasato University. 1-15-1, Kitasato, Sagamihara, Kanagawa 252-0373, Japan
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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] [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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Mahler V. [New allergens for occupational dermatology?]. Hautarzt 2021; 72:474-483. [PMID: 33950272 DOI: 10.1007/s00105-021-04825-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/06/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND The environment is continuously subject to change. Exposures in the work environment and therefore the importance of occupational type I and type IV allergens may change. OBJECTIVES The most important trends concerning occupational allergens, new occupational allergens/allergen exposures, the diagnostic procedure to detect new allergens in practice and regulatory developments are presented. MATERIALS AND METHODS Building on known relevant allergen exposures in occupational dermatology, published trends from clinical cohorts are evaluated and a systematic literature search (PubMed 2016-2021) for new occupational allergens is also performed RESULTS: Occupations with the highest incidence of occupational allergic contact urticaria and/or protein contact dermatitis include bakers, farmers and farm workers, veterinary technicians, veterinarians, cooks, dairy and livestock workers, gardeners, and hairdressers. The highest risk of developing occupational contact dermatitis is in health care, agriculture, metalworking occupations and machine operators, the food sector, service industries, and construction occupations. The search strategy "new occupational allerg*" yielded 603 hits and "novel occupational allerg*" 158 hits. A total of 25 papers included results relevant to the research question and were processed. New protein-based immediate-type allergens, as well as contact allergens (haptens) relevant for occupational dermatology, are presented. CONCLUSIONS Current trends on known occupational allergens and new occupational allergens in the period 2016-2021 can be identified. Only a thorough individual workplace history and testing of patients' own materials can identify new allergens in occupational dermatology.
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Affiliation(s)
- Vera Mahler
- Paul-Ehrlich-Institut, Paul-Ehrlich-Str. 51-59, 63225, Langen, Deutschland. .,Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Erlangen, Deutschland.
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Liu X, Fu J, Yao K, Chang Y, Xu K, Yang L. Phenanthroline-based fluorescence sensors for Eu3+ ion and subsequent enantioselective discriminating of malate. Supramol Chem 2018. [DOI: 10.1080/10610278.2018.1517877] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Xiaoyan Liu
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, China
| | - Jiaxin Fu
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, China
| | - Kun Yao
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, China
| | - Yongxin Chang
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, China
| | - Kuoxi Xu
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, China
- Engineering Laboratory for Flame Retardant and Functional Materials of Henan Province, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, China
| | - Li Yang
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, China
- Engineering Laboratory for Flame Retardant and Functional Materials of Henan Province, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, China
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