1
|
Hymas M, Wongwas S, Roshan S, Whittock AL, Corre C, Omidyan R, Stavros VG. A Multipronged Bioengineering, Spectroscopic and Theoretical Approach in Unravelling the Excited-State Dynamics of the Archetype Mycosporine Amino Acid. J Phys Chem Lett 2024; 15:7424-7429. [PMID: 38996192 DOI: 10.1021/acs.jpclett.4c01254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/14/2024]
Abstract
Mycosporine glycine (MyG) was produced by the fermentation of a purposely engineered bacterial strain and isolated from this sustainable source. The ultrafast spectroscopy of MyG was then investigated in its native, zwitterionic form (MyGzwitter), via femtosecond transient electronic absorption spectroscopy. Complementary nonadiabatic (NAD) simulations suggest that, upon photoexcitation to the lowest excited singlet state (S1), MyGzwitter undergoes efficient nonradiative decay to repopulate the electronic ground state (S0). We propose an initial ultrafast ring-twisting mechanism toward an S1/S0 conical intersection, followed by internal conversion to S0 and subsequent vibrational cooling. This study illuminates the workings of the archetype mycosporine, providing photoprotection, in the UV-B range, to organisms such as corals, macroalgae, and cyanobacteria. This study also contributes to our growing understanding of the photoprotection mechanisms of life.
Collapse
Affiliation(s)
- Michael Hymas
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
- School of Chemistry, University of Birmingham, Edgbaston B15 2TT, United Kingdom
| | - Sopida Wongwas
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Simin Roshan
- Department of Chemistry, University of Isfahan, 81746-73441 Isfahan, Iran
| | - Abigail L Whittock
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
- Analytical Science Centre for Doctoral Training, Senate House, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Christophe Corre
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Reza Omidyan
- Department of Chemistry, University of Isfahan, 81746-73441 Isfahan, Iran
| | - Vasilios G Stavros
- School of Chemistry, University of Birmingham, Edgbaston B15 2TT, United Kingdom
| |
Collapse
|
2
|
Arsın S, Delbaje E, Jokela J, Wahlsten M, Farrar ZM, Permi P, Fewer D. A Plastic Biosynthetic Pathway for the Production of Structurally Distinct Microbial Sunscreens. ACS Chem Biol 2023; 18:1959-1967. [PMID: 37603862 PMCID: PMC10510106 DOI: 10.1021/acschembio.3c00112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 08/07/2023] [Indexed: 08/23/2023]
Abstract
Mycosporine-like amino acids (MAAs) are small, colorless, and water-soluble secondary metabolites. They have high molar extinction coefficients and a unique UV radiation absorption mechanism that make them effective sunscreens. Here we report the discovery of two structurally distinct MAAs from the lichen symbiont strain Nostoc sp. UHCC 0926. We identified these MAAs as aplysiapalythine E (C23H38N2O15) and tricore B (C34H53N4O15) using a combination of high-resolution liquid chromatography-mass spectrometry (HR-LCMS) analysis and nuclear magnetic resonance (NMR) spectroscopy. We obtained a 8.3 Mb complete genome sequence of Nostoc sp. UHCC 0926 to gain insights into the genetic basis for the biosynthesis of these two structural distinct MAAs. We identified MAA biosynthetic genes encoded in three separate locations of the genome. The organization of biosynthetic enzymes in Nostoc sp. UHCC 0926 necessitates a branched biosynthetic pathway to produce two structurally distinct MAAs. We detected the presence of such discontiguous MAA biosynthetic gene clusters in 12% of the publicly available complete cyanobacterial genomes. Bioinformatic analysis of public MAA biosynthetic gene clusters suggests that they are subject to rapid evolutionary processes resulting in highly plastic biosynthetic pathways that are responsible for the chemical diversity in this family of microbial sunscreens.
Collapse
Affiliation(s)
- Sıla Arsın
- University
of Helsinki, Department of Microbiology,
Faculty of Agriculture and Forestry, 00014 Helsinki, Finland
| | - Endrews Delbaje
- University
of São Paulo, Center for Nuclear
Energy in Agriculture, Avenida Centenário 303, 13400-970 Piracicaba, São Paulo, Brazil
| | - Jouni Jokela
- University
of Helsinki, Department of Microbiology,
Faculty of Agriculture and Forestry, 00014 Helsinki, Finland
| | - Matti Wahlsten
- University
of Helsinki, Department of Microbiology,
Faculty of Agriculture and Forestry, 00014 Helsinki, Finland
| | - Zoë M. Farrar
- University
of Helsinki, Department of Microbiology,
Faculty of Agriculture and Forestry, 00014 Helsinki, Finland
| | - Perttu Permi
- Department
of Chemistry, University of Jyväskylä, 40014 Jyväskylä, Finland
- Department
of Biological and Environmental Science, Nanoscience Center, University of Jyväskylä, 40014 Jyväskylä, Finland
| | - David Fewer
- University
of Helsinki, Department of Microbiology,
Faculty of Agriculture and Forestry, 00014 Helsinki, Finland
| |
Collapse
|
3
|
Hatakeyama M, Nakamura S. Intrinsic Nature of the Ultrafast Deexcitation Pathway of Mycosporine-like Amino Acid Porphyra-334. J Phys Chem A 2022; 126:7460-7467. [PMID: 36205073 DOI: 10.1021/acs.jpca.2c05034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Porphyra-334 is a member of natural UV-screening compounds named mycosporine-like amino acids found in several marine organisms. The UV excited porphyra-334 has been identified to deexcite quickly by puckering the intramolecular cyclohexenimine ring; however, the reason for such a ring-puckering occurrence is yet unclear. In this study, we show the ring-puckering to be the relaxation pathway of the UV excited π electron which shifts from the in-ring bond to the out-of-ring bond. The ring-puckering is characterized by the torsion among the in-ring and out-of-ring bonds. Since the π electron shift is possible in two different directions at the Franck-Condon UV excited state, it enables two ring-puckering pathways: the previously reported pathway and another one newly identified at present. We also examine the ring-unpuckering pathways which are an analogy of cis/trans photoisomerization, and we find them to be not suited for the π electron shift character of the UV excited state and thus not related to the deexcitation pathway. The present study provides insight into how porphyra-334 exerts the UV-screening ability based on its cyclohexenimine ring structure.
Collapse
Affiliation(s)
- Makoto Hatakeyama
- Sanyo-Onoda City University, 1-1-1 Daigakudori, Sanyo-Onoda, Yamaguchi 756-0884, Japan
| | | |
Collapse
|
4
|
Investigating the Ultrafast Dynamics and Long-Term Photostability of an Isomer Pair, Usujirene and Palythene, from the Mycosporine-like Amino Acid Family. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27072272. [PMID: 35408670 PMCID: PMC9000306 DOI: 10.3390/molecules27072272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 03/25/2022] [Accepted: 03/28/2022] [Indexed: 11/17/2022]
Abstract
Mycosporine-like amino acids are a prevalent form of photoprotection in micro- and macro-organisms. Using a combination of natural product extraction/purification and femtosecond transient absorption spectroscopy, we studied the relaxation pathway for a common mycosporine-like amino acid pair, usujirene and its geometric isomer palythene, in the first few nanoseconds following photoexcitation. Our studies show that the electronic excited state lifetimes of these molecules persist for only a few hundred femtoseconds before the excited state population is funneled through an energetically accessible conical intersection with subsequent vibrational energy transfer to the solvent. We found that a minor portion of the isomer pair did not recover to their original state within 3 ns after photoexcitation. We investigated the long-term photostability using continuous irradiation at a single wavelength and with a solar simulator to mimic a more real-life environment; high levels of photostability were observed in both experiments. Finally, we employed computational methods to elucidate the photochemical and photophysical properties of usujirene and palythene as well as to reconcile the photoprotective mechanism.
Collapse
|
5
|
Varnali T, Bozoflu M, Şengönül H, Kurt Sİ. Potential metal chelating ability of mycosporine-like amino acids: a computational research. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-021-02014-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
6
|
Zaytseva A, Chekanov K, Zaytsev P, Bakhareva D, Gorelova O, Kochkin D, Lobakova E. Sunscreen Effect Exerted by Secondary Carotenoids and Mycosporine-like Amino Acids in the Aeroterrestrial Chlorophyte Coelastrella rubescens under High Light and UV-A Irradiation. PLANTS (BASEL, SWITZERLAND) 2021; 10:plants10122601. [PMID: 34961072 PMCID: PMC8704241 DOI: 10.3390/plants10122601] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 11/19/2021] [Accepted: 11/23/2021] [Indexed: 05/13/2023]
Abstract
The microalga Coelastrella rubescens dwells in habitats with excessive solar irradiation; consequently, it must accumulate diverse compounds to protect itself. We characterized the array of photoprotective compounds in C. rubescens. Toward this goal, we exposed the cells to high fluxes of visible light and UV-A and analyzed the ability of hydrophilic and hydrophobic extracts from the cells to absorb radiation. Potential light-screening compounds were profiled by thin layer chromatography and UPLC-MS. Coelastrella accumulated diverse carotenoids that absorbed visible light in the blue-green part of the spectrum and mycosporine-like amino acids (MAA) that absorbed the UV-A. It is the first report on the occurrence of MAA in Coelastrella. Two new MAA, named coelastrin A and coelastrin B, were identified. Transmission electron microscopy revealed the development of hydrophobic subcompartments under the high light and UV-A exposition. We also evaluate and discuss sporopollenin-like compounds in the cell wall and autophagy-like processes as the possible reason for the decrease in sunlight absorption by cells, in addition to inducible sunscreen accumulation. The results suggested that C. rubescens NAMSU R1 accumulates a broad range of valuable photoprotective compounds in response to UV-A and visible light irradiation, which indicates this strain as a potential producer for biotechnology.
Collapse
Affiliation(s)
- Anna Zaytseva
- Department of Bioengineering, Faculty of Biology, Lomonosov Moscow State University, 1-12 Leninskie Gory, 119192 Moscow, Russia; (A.Z.); (P.Z.); (D.B.); (O.G.); (E.L.)
| | - Konstantin Chekanov
- Department of Bioengineering, Faculty of Biology, Lomonosov Moscow State University, 1-12 Leninskie Gory, 119192 Moscow, Russia; (A.Z.); (P.Z.); (D.B.); (O.G.); (E.L.)
- Centre for Humanities Research and Technology, National Research Nuclear University MEPhI, 31 Kashirskoye Highway, 115522 Moscow, Russia
- Correspondence:
| | - Petr Zaytsev
- Department of Bioengineering, Faculty of Biology, Lomonosov Moscow State University, 1-12 Leninskie Gory, 119192 Moscow, Russia; (A.Z.); (P.Z.); (D.B.); (O.G.); (E.L.)
- N.N. Semyonov Federal Research Center for Chemical Physics, Russian Academy of Science, 4 Kosygina Street, Building 1, 119192 Moscow, Russia
| | - Daria Bakhareva
- Department of Bioengineering, Faculty of Biology, Lomonosov Moscow State University, 1-12 Leninskie Gory, 119192 Moscow, Russia; (A.Z.); (P.Z.); (D.B.); (O.G.); (E.L.)
| | - Olga Gorelova
- Department of Bioengineering, Faculty of Biology, Lomonosov Moscow State University, 1-12 Leninskie Gory, 119192 Moscow, Russia; (A.Z.); (P.Z.); (D.B.); (O.G.); (E.L.)
| | - Dmitry Kochkin
- Department of Plant Physiology, Faculty of Biology, Lomonosov Moscow State University, 1-12 Leninskie Gory, 119192 Moscow, Russia;
- Timiryazev Institute of Plant Physiology, Russian Academy of Science, Botanicheskaya Street 35, 127276 Moscow, Russia
| | - Elena Lobakova
- Department of Bioengineering, Faculty of Biology, Lomonosov Moscow State University, 1-12 Leninskie Gory, 119192 Moscow, Russia; (A.Z.); (P.Z.); (D.B.); (O.G.); (E.L.)
- Timiryazev Institute of Plant Physiology, Russian Academy of Science, Botanicheskaya Street 35, 127276 Moscow, Russia
| |
Collapse
|
7
|
Whittock AL, Auckloo N, Cowden AM, Turner MAP, Woolley JM, Wills M, Corre C, Stavros VG. Exploring the Blueprint of Photoprotection in Mycosporine-like Amino Acids. J Phys Chem Lett 2021; 12:3641-3646. [PMID: 33826340 DOI: 10.1021/acs.jpclett.1c00728] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Microorganisms require protection against the potentially damaging effects of ultraviolet radiation exposure. Photoprotection is, in part, provided by mycosporine-like amino acids (MAAs). Previous reports have proposed that nonradiative decay mediates the impressive photoprotection abilities of MAAs. In this letter, we present the first ultrafast dynamics study of two MAAs, shinorine and porphyra-334. We demonstrate that, in aqueous solution, these MAAs relax along their S1 coordinates toward the S1/S0 conical intersection within a few hundred femtoseconds after photoexcitation and then traverse the conical intersection and vibrationally cool in approximately 1 ps through heat transfer to the solvent. This new insight allows a quintessential component of microbial life to be unraveled and informs the development of molecular photon-to-heat converters for a myriad of applications.
Collapse
Affiliation(s)
- Abigail L Whittock
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, United Kingdom
- Analytical Science Centre for Doctoral Training, Senate House, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Nazia Auckloo
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, United Kingdom
- Warwick Integrative Synthetic Biology Centre and School of Life Sciences, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Adam M Cowden
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, United Kingdom
- Molecular Analytical Science Centre for Doctoral Training, Senate House, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Matthew A P Turner
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Jack M Woolley
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Martin Wills
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Christophe Corre
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, United Kingdom
- Warwick Integrative Synthetic Biology Centre and School of Life Sciences, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Vasilios G Stavros
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, United Kingdom
| |
Collapse
|
8
|
Abiola TT, Whittock AL, Stavros VG. Unravelling the Photoprotective Mechanisms of Nature-Inspired Ultraviolet Filters Using Ultrafast Spectroscopy. Molecules 2020; 25:E3945. [PMID: 32872380 PMCID: PMC7504748 DOI: 10.3390/molecules25173945] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 08/26/2020] [Accepted: 08/27/2020] [Indexed: 02/07/2023] Open
Abstract
There are several drawbacks with the current commercially available ultraviolet (UV) filters used in sunscreen formulations, namely deleterious human and ecotoxic effects. As a result of the drawbacks, a current research interest is in identifying and designing new UV filters. One approach that has been explored in recent years is to use nature as inspiration, which is the focus of this review. Both plants and microorganisms have adapted to synthesize their own photoprotective molecules to guard their DNA from potentially harmful UV radiation. The relaxation mechanism of a molecule after it has been photoexcited can be unravelled by several techniques, the ones of most interest for this review being ultrafast spectroscopy and computational methods. Within the literature, both techniques have been implemented on plant-, and microbial-inspired UV filters to better understand their photoprotective roles in nature. This review aims to explore these findings for both families of nature-inspired UV filters in the hope of guiding the future design of sunscreens.
Collapse
Affiliation(s)
- Temitope T. Abiola
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK; (T.T.A.); (A.L.W.)
| | - Abigail L. Whittock
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK; (T.T.A.); (A.L.W.)
- AS CDT, Senate House, University of Warwick, Coventry CV4 7AL, UK
| | - Vasilios G. Stavros
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK; (T.T.A.); (A.L.W.)
| |
Collapse
|
9
|
Abstract
Sunscreen-containing skincare products protect the skin from damage caused by sun exposure. However, many of them contain oxybenzone and/or octinoxate, which have been reported to be toxic to juvenile coral and to cause coral bleaching. Thus, there is a growing need for new sunscreen compounds that are less harmful to the environment. Here, we report an engineered biosynthetic pathway employing genes from a vertebrate and two Gram-(+) bacteria that forms novel sunscreen compounds with hybrid structures of gadusol and mycosporine-like amino acids, both of which are found in marine environments. These compounds, named gadusporines, have unique UV absorbance at 340 nm, expanding the range of mycosporine- and gadusol-based sunscreen products. The synthesis of gadusporines in Streptomyces coelicolor establishes a platform for the design and production of novel sunscreens.
Collapse
Affiliation(s)
- Andrew R. Osborn
- Department of Pharmaceutical Sciences, Oregon State University, Corvallis, Oregon 97331-3507, United States
| | - Taifo Mahmud
- Department of Pharmaceutical Sciences, Oregon State University, Corvallis, Oregon 97331-3507, United States
| |
Collapse
|
10
|
Pliego-Cortés H, Bedoux G, Boulho R, Taupin L, Freile-Pelegrín Y, Bourgougnon N, Robledo D. Stress tolerance and photoadaptation to solar radiation in Rhodymenia pseudopalmata (Rhodophyta) through mycosporine-like amino acids, phenolic compounds, and pigments in an Integrated Multi-Trophic Aquaculture system. ALGAL RES 2019. [DOI: 10.1016/j.algal.2019.101542] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
11
|
de la Coba F, Aguilera J, Korbee N, de Gálvez MV, Herrera-Ceballos E, Álvarez-Gómez F, Figueroa FL. UVA and UVB Photoprotective Capabilities of Topical Formulations Containing Mycosporine-like Amino Acids (MAAs) through Different Biological Effective Protection Factors (BEPFs). Mar Drugs 2019; 17:md17010055. [PMID: 30646557 PMCID: PMC6356945 DOI: 10.3390/md17010055] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 12/21/2018] [Accepted: 01/03/2019] [Indexed: 12/12/2022] Open
Abstract
The safety and stability of synthetic UV-filters and the procedures for evaluating the photoprotective capability of commercial sunscreens are under continuous review. The influence of pH and temperature stressors on the stability of certain Mycosporine-like amino acids (MAAs) isolated at high purity levels was examined. MAAs were highly stable at room temperature during 24 h at pH 4.5–8.5. At 50 °C, MAAs showed instability at pH 10.5 while at 85 °C, progressive disappearances were observed for MAAs through the studied pH range. In alkaline conditions, their degradation was much faster. Mycosporine-serinol and porphyra-334 (+shinorine) were the most stable MAAs under the conditions tested. They were included in four cosmetically stable topical sunscreens, of which the Sun Protection Factor (SPF) and other Biological Effective Protection Factors (BEPFs) were calculated. The formulation containing these MAAs showed similar SPF and UVB-BEPFs values as those of the reference sunscreen, composed of synthetic UV absorbing filters in similar percentages, while UVA-BEPFs values were slightly lower. Current in vitro data strongly suggest that MAAs, as natural and safe UV-absorbing and antioxidant compounds, have high potential for protection against the diverse harmful effects of solar UV radiation. In addition, novel complementary in vitro tests for evaluation of commercial sunscreens efficacy are proposed.
Collapse
Affiliation(s)
- Francisca de la Coba
- Department of Ecology and Geology, Faculty of Science, University of Malaga, Campus Universitario de Teatinos s/n, E-29071 Malaga, Spain.
- Photobiology Laboratory, Central Service for Research Support (SCAI), University of Malaga, Campus Universitario de Teatinos s/n, E-29071 Malaga, Spain.
| | - José Aguilera
- Photobiological Dermatology Laboratory, Medical Research Centre, University of Malaga, Campus Universitario de Teatinos s/n, E-29071 Malaga, Spain.
- Department of Dermatology and Medicine, Faculty of Medicine, University of Malaga, Campus Universitario de Teatinos s/n, E-29071 Malaga, Spain.
| | - Nathalie Korbee
- Department of Ecology and Geology, Faculty of Science, University of Malaga, Campus Universitario de Teatinos s/n, E-29071 Malaga, Spain.
| | - María Victoria de Gálvez
- Photobiological Dermatology Laboratory, Medical Research Centre, University of Malaga, Campus Universitario de Teatinos s/n, E-29071 Malaga, Spain.
- Department of Dermatology and Medicine, Faculty of Medicine, University of Malaga, Campus Universitario de Teatinos s/n, E-29071 Malaga, Spain.
| | - Enrique Herrera-Ceballos
- Photobiological Dermatology Laboratory, Medical Research Centre, University of Malaga, Campus Universitario de Teatinos s/n, E-29071 Malaga, Spain.
- Department of Dermatology and Medicine, Faculty of Medicine, University of Malaga, Campus Universitario de Teatinos s/n, E-29071 Malaga, Spain.
| | - Félix Álvarez-Gómez
- Department of Ecology and Geology, Faculty of Science, University of Malaga, Campus Universitario de Teatinos s/n, E-29071 Malaga, Spain.
| | - Félix L Figueroa
- Department of Ecology and Geology, Faculty of Science, University of Malaga, Campus Universitario de Teatinos s/n, E-29071 Malaga, Spain.
- Photobiology Laboratory, Central Service for Research Support (SCAI), University of Malaga, Campus Universitario de Teatinos s/n, E-29071 Malaga, Spain.
| |
Collapse
|
12
|
Mycosporine-Like Amino Acids as Multifunctional Secondary Metabolites in Cyanobacteria: From Biochemical to Application Aspects. STUDIES IN NATURAL PRODUCTS CHEMISTRY 2018. [DOI: 10.1016/b978-0-444-64179-3.00005-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
|
13
|
Orallo DE, Bertolotti SG, Churio MS. Photophysicochemical characterization of mycosporine-like amino acids in micellar solutions. Photochem Photobiol Sci 2017; 16:1117-1125. [PMID: 28548169 DOI: 10.1039/c7pp00051k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The properties and photochemical and photophysical behavior of the mycosporine-like amino acids (MAAs) shinorine and porphyra-334 were experimentally evaluated in solutions of direct ionic micelles as simple biomimicking environments. The preferential partition of the natural molecules in the aqueous phase of sodium dodecyl sulfate (SDS) or cetyltrimethylammonium chloride (CTAC) micellar systems is confirmed. Although the proton dissociation of the carboxylic groups in the MAAs is slightly inhibited in CTAC solutions, the molecules are predicted to be in the form of zwitterions in all the explored media around physiological pH. The increase in the fluorescence quantum yield, emission lifetime and stationary anisotropy in the presence of CTAC micelles suggest electrostatic attractions of the MAAs with the surface of the cationic micelles. Consistently, the triplet-triplet absorption spectra in CTAC solutions reveal the typical environmental features of the micellar interface, while in the presence of SDS they are similar to those determined in neat water. Finally, the photostability of the MAAs increases in the micellar systems, more noticeably in the case of CTAC. It is concluded that the ability of the two MAAs to act as UV screens is susceptible to the influence of electrostatic interactions with organized microheterogeneous environments.
Collapse
Affiliation(s)
- D E Orallo
- IFIMAR, Instituto de Investigaciones Físicas de Mar del Plata (CONICET-UNMDP), Departamento de Química, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Funes 3350, (B7602AYL) Mar del Plata, Argentina.
| | - S G Bertolotti
- Departamento de Química, Universidad Nacional de Río Cuarto, CONICET, (X5804BYA) Río Cuarto, Argentina
| | - M S Churio
- IFIMAR, Instituto de Investigaciones Físicas de Mar del Plata (CONICET-UNMDP), Departamento de Química, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Funes 3350, (B7602AYL) Mar del Plata, Argentina.
| |
Collapse
|
14
|
Effect of UV-B Radiation and Desiccation Stress on Photoprotective Compounds Accumulation in Marine Leptolyngbya sp. Appl Biochem Biotechnol 2017; 184:35-47. [PMID: 28584967 DOI: 10.1007/s12010-017-2523-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 05/19/2017] [Indexed: 01/03/2023]
Abstract
Increased awareness regarding the harmful effects of ultraviolet (UV)-B radiation has led to the search for new sources of natural UV-B protecting compounds. Mycosporine-like amino acids are one of such promising compounds found in several organisms. Cyanobacteria are ideal organisms for isolation of these compounds due to their compatibility and adaptability to thrive under harsh environmental conditions. In the following investigation, we report the production of shinorine in Leptolyngbya sp. isolated from the intertidal region. Based on the spectral characteristics and liquid chromatography-mass spectrometry analysis, the UV-absorbing compound was identified as shinorine. To the best of our knowledge, this is the first report on the occurrence of shinorine in Leptolyngbya sp. We also investigated the effect of artificial UV-B radiation and periodic desiccation on chlorophyll-a, total carotenoids, and mycosporine-like amino acids (MAAs) production. The UV-B radiation had a negative effect on growth and chlorophyll concentration, whereas it showed an inductive effect on the production of total carotenoids and MAAs. Desiccation along with UV-B radiation led to an increase in the concentration of photoprotective compounds. These results indicate that carotenoids and MAAs thus facilitate cyanobacteria to avoid and protect themselves from the deleterious effects of UV-B and desiccation.
Collapse
|
15
|
Cheewinthamrongrod V, Kageyama H, Palaga T, Takabe T, Waditee-Sirisattha R. DNA damage protecting and free radical scavenging properties of mycosporine-2-glycine from the Dead Sea cyanobacterium in A375 human melanoma cell lines. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 164:289-295. [PMID: 27718421 DOI: 10.1016/j.jphotobiol.2016.09.037] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Accepted: 09/12/2016] [Indexed: 10/20/2022]
Abstract
Mycosporine-like amino acids (MAAs) are a group of natural sunscreen compounds that possess highly photoprotective properties. The most commonly found MAAs in marine organisms is shinorine, porphyra-334, and mycosporine-glycine. However, the halophilic species accumulate mycosporine-2-glycine (M2G) as the major MAA. In this study, we have investigated the protective effect of M2G against oxidative stress. In vitro radical scavenging activity revealed that M2G exhibited a significant inhibition with scavenging concentration (SC) 50 value of 22±1.4μM. In vivo analysis using the human melanoma A375 and a control cell line (NHSF) showed that M2G at low concentration (i.e. micromolar range) protected the cells against the oxidative stress (H2O2)-induced cell death. Comet assay to assess total DNA strand breaks demonstrated that M2G was not genotoxic and protected against the DNA damage by H2O2 treatment at the same level as ascorbic acid. To our knowledge, this is the first evidence demonstrating potential protective role of the natural sunscreen compound M2G against oxidative stress-induced DNA damage in human cell lines. The potent antioxidant activity combined with DNA protection ability of M2G may support its endorsement as a potential natural sunscreen with antioxidant property. These findings provide important clues for possible use of M2G in pharmaceutical and biotechnological applications.
Collapse
Affiliation(s)
- Vipaporn Cheewinthamrongrod
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Patumwan, Bangkok 10330, Thailand; Program in Biotechnology, Faculty of Science, Chulalongkorn University, Patumwan, Bangkok 10330, Thailand
| | - Hakuto Kageyama
- Graduate School of Environmental and Human Sciences, Meijo University, Nagoya 468-8502, Japan
| | - Tanapat Palaga
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Patumwan, Bangkok 10330, Thailand
| | - Teruhiro Takabe
- Graduate School of Environmental and Human Sciences, Meijo University, Nagoya 468-8502, Japan; Research Institute of Meijo University, Nagoya 468-8502, Japan
| | | |
Collapse
|