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Sainakham M, Promma B, Ngernthong A, Kiattisin K, Boonpisuttinant K, Wuttikul K, Jantrawut P, Ruksiriwanich W. Preparation and stability investigation of ultrasound-assisted W/O/W multiple nanoemulsions co-loaded with hydrophobic curcumin and hydrophilic arbutin for tyrosinase inhibition. Heliyon 2024; 10:e34665. [PMID: 39130479 PMCID: PMC11315199 DOI: 10.1016/j.heliyon.2024.e34665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 06/25/2024] [Accepted: 07/15/2024] [Indexed: 08/13/2024] Open
Abstract
In the present, whitening products are most popular in the cosmetics market, and nanoemulsions are effective drug delivery systems through the skin. The objective of this study was to investigate multiple nanoemulsion formulations for lightning skin effects. The method of this study was the selection of active compounds based on synergistic tyrosinase inhibition activity, formulation preparation by low and high energy methods, physicochemical property determination, stability test, cell toxicity, and anti-melanogenesis in cell culture. From the results, it was found that tyrosinase inhibition with substrate l-tyrosine from the mixture of curcumin and alpha-arbutin gave the highest activity with an IC50 of 63.58 ± 4.99 μM, showed a synergistic effect at a CI value of 0.99, and selected these compounds to develop formulations by the low energy method. However, the most formulations prepared by this method were unstable and phase separated, while the high energy method gave the most formulations with good properties, which were selected for further investigation. The best formulation was 2DS which showed internal droplet morphology in the range of nanometers under a TEM microscope. For 3 months stability test, the formulations had no phase separation and gave the slightly changed values of particle size, polydispersity index (PDI), zeta potentials, and pH values. In addition, multiple nanoemulsions also enhanced the stability of active compounds, with the highest percentage of remaining content of curcumin and arbutin at 94.69 and 90.45 %, respectively at 4 °C for 3 months. In a cell culture test on B16F10, 2DS at 0.05 g/ml gave no cell cytotoxicity and anti-melanogenesis at 57.75 ± 5.74 %, the same potency as kojic acid at a concentration of 20 μg/ml. Therefore, this study will be useful to prepare multiple nanoemulsions for further development into novel health care products.
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Affiliation(s)
- Mathukorn Sainakham
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University, Chiang Mai, 50200, Thailand
- Cluster of Valorization and Bio-Green Transformation for Translational Research Innovation of Raw Materials and Products, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Bouachompoo Promma
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Arthima Ngernthong
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Kanokwan Kiattisin
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Korawinwich Boonpisuttinant
- Innovative Natural Products from Thai Wisdoms (INPTW), Faculty of Integrative Medicine, Rajamangala University of Technology, Thanyaburi, Pathumthani, 12130, Thailand
| | - Krisada Wuttikul
- Division of Cosmetic Science, School of Pharmaceutical Sciences, University of Phayao, Phayao, 56000, Thailand
| | - Pensak Jantrawut
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University, Chiang Mai, 50200, Thailand
- Cluster of Valorization and Bio-Green Transformation for Translational Research Innovation of Raw Materials and Products, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Warintorn Ruksiriwanich
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University, Chiang Mai, 50200, Thailand
- Cluster of Valorization and Bio-Green Transformation for Translational Research Innovation of Raw Materials and Products, Chiang Mai University, Chiang Mai, 50200, Thailand
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2
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Faure C, Min Ng Y, Belle C, Soler-Lopez M, Khettabi L, Saïdi M, Berthet N, Maresca M, Philouze C, Rachidi W, Réglier M, du Moulinet d'Hardemare A, Jamet H. Interactions of Phenylalanine Derivatives with Human Tyrosinase: Lessons from Experimental and Theoretical tudies. Chembiochem 2024; 25:e202400235. [PMID: 38642076 DOI: 10.1002/cbic.202400235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 04/18/2024] [Accepted: 04/19/2024] [Indexed: 04/22/2024]
Abstract
The pigmentation of the skin, modulated by different actors in melanogenesis, is mainly due to the melanins (protective pigments). In humans, these pigments' precursors are synthetized by an enzyme known as tyrosinase (TyH). The regulation of the enzyme activity by specific modulators (inhibitors or activators) can offer a means to fight hypo- and hyper-pigmentations responsible for medical, psychological and societal handicaps. Herein, we report the investigation of phenylalanine derivatives as TyH modulators. Interacting with the binuclear copper active site of the enzyme, phenylalanine derivatives combine effects induced by combination with known resorcinol inhibitors and natural substrate/intermediate (amino acid part). Computational studies including docking, molecular dynamics and free energy calculations combined with biological activity assays on isolated TyH and in human melanoma MNT-1 cells, and X-ray crystallography analyses with the TyH analogue Tyrp1, provide conclusive evidence of the interactions of phenylalanine derivatives with human tyrosinase. In particular, our findings indicate that an analogue of L-DOPA, namely (S)-3-amino-tyrosine, stands out as an amino phenol derivative with inhibitory properties against TyH.
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Affiliation(s)
- Clarisse Faure
- Université Grenoble Alpes, CNRS, Department of Molecular Chemistry (DCM, UMR 5250), 38058, Grenoble Cedex 9, France
| | - Yi Min Ng
- Structural Biology Group, European Synchrotron Radiation Facility (ESRF), 38053, Grenoble, France
| | - Catherine Belle
- Université Grenoble Alpes, CNRS, Department of Molecular Chemistry (DCM, UMR 5250), 38058, Grenoble Cedex 9, France
| | - Montserrat Soler-Lopez
- Structural Biology Group, European Synchrotron Radiation Facility (ESRF), 38053, Grenoble, France
| | - Lyna Khettabi
- Structural Biology Group, European Synchrotron Radiation Facility (ESRF), 38053, Grenoble, France
| | - Mélissa Saïdi
- Structural Biology Group, European Synchrotron Radiation Facility (ESRF), 38053, Grenoble, France
| | - Nathalie Berthet
- Université Grenoble Alpes, CNRS, Department of Molecular Chemistry (DCM, UMR 5250), 38058, Grenoble Cedex 9, France
| | - Marc Maresca
- Aix Marseille Université, CNRS, Centrale Marseille, iSm2, Marseille, France)
| | - Christian Philouze
- Université Grenoble Alpes, CNRS, Department of Molecular Chemistry (DCM, UMR 5250), 38058, Grenoble Cedex 9, France
| | - Walid Rachidi
- IRIG-BGE U1038, INSERM, Univ. Grenoble Alpes, Biomics, 38054, Grenoble, France
| | - Marius Réglier
- Aix Marseille Université, CNRS, Centrale Marseille, iSm2, Marseille, France)
| | | | - Hélène Jamet
- Université Grenoble Alpes, CNRS, Department of Molecular Chemistry (DCM, UMR 5250), 38058, Grenoble Cedex 9, France
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3
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Muñoz SM, Vallejos-Baccelliere G, Manubens A, Salazar ML, Nascimento AFZ, Tapia-Reyes P, Meneses C, Ambrosio ALB, Becker MI, Guixé V, Castro-Fernandez V. Structural insights into a functional unit from an immunogenic mollusk hemocyanin. Structure 2024; 32:812-823.e4. [PMID: 38513659 DOI: 10.1016/j.str.2024.02.018] [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: 11/10/2023] [Revised: 01/30/2024] [Accepted: 02/23/2024] [Indexed: 03/23/2024]
Abstract
Mollusk hemocyanins, among the largest known proteins, are used as immunostimulants in biomedical and clinical applications. The hemocyanin of the Chilean gastropod Concholepas concholepas (CCH) exhibits unique properties, which makes it safe and effective for human immunotherapy, as observed in animal models of bladder cancer and melanoma, and dendritical cell vaccine trials. Despite its potential, the structure and amino acid sequence of CCH remain unknown. This study reports two sequence fragments of CCH, representing three complete functional units (FUs). We also determined the high-resolution (1.5 Å) X-ray crystal structure of an "FU-g type" from the CCHB subunit. This structure enables in-depth analysis of chemical interactions at the copper-binding center and unveils an unusual, truncated N-glycosylation pattern. These features are linked to eliciting more robust immunological responses in animals, offering insights into CCH's enhanced immunostimulatory properties and opening new avenues for its potential applications in biomedical research and therapies.
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Affiliation(s)
- Sebastián M Muñoz
- Laboratorio de Bioquímica y Biología Molecular, Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Santiago 780003, Chile
| | - Gabriel Vallejos-Baccelliere
- Laboratorio de Bioquímica y Biología Molecular, Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Santiago 780003, Chile
| | - Augusto Manubens
- Departamento de Investigación y Desarrollo, Biosonda Corp., Santiago 7750629, Chile; Fundación Ciencia y Tecnología para el Desarrollo (FUCITED), Santiago 7750629, Chile
| | - Michelle L Salazar
- Fundación Ciencia y Tecnología para el Desarrollo (FUCITED), Santiago 7750629, Chile
| | - Andrey F Z Nascimento
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Sao Paulo 13083-970, Brazil
| | - Patricio Tapia-Reyes
- Escuela de Biotecnología, Facultad de Ciencias, Universidad Santo Tomás, Santiago 8370003, Chile; Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago 8331150, Chile
| | - Claudio Meneses
- Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago 8331150, Chile; Departamento de Fruticultura y Enología, Facultad de Agronomía y Sistemas Naturales, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile; Millennium Nucleus Development of Super Adaptable Plants (MN-SAP), Santiago 8331150, Chile; Millennium Institute Center for Genome Regulation (CRG), Santiago 8331150, Chile
| | - Andre L B Ambrosio
- Sao Carlos Institute of Physics (IFSC), University of Sao Paulo (USP), Sao Carlos, Sao Paulo 13563-120, Brazil
| | - María Inés Becker
- Departamento de Investigación y Desarrollo, Biosonda Corp., Santiago 7750629, Chile; Fundación Ciencia y Tecnología para el Desarrollo (FUCITED), Santiago 7750629, Chile
| | - Victoria Guixé
- Laboratorio de Bioquímica y Biología Molecular, Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Santiago 780003, Chile.
| | - Victor Castro-Fernandez
- Laboratorio de Bioquímica y Biología Molecular, Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Santiago 780003, Chile.
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4
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Panda S, Phan H, Dunietz EM, Brueggemeyer MT, Hota PK, Siegler MA, Jose A, Bhadra M, Solomon EI, Karlin KD. Intramolecular Phenolic H-Atom Abstraction by a N 3ArOH Ligand-Supported (μ-η 2:η 2-Peroxo)dicopper(II) Species Relevant to the Active Site Function of oxy-Tyrosinase. J Am Chem Soc 2024; 146:14942-14947. [PMID: 38775712 PMCID: PMC11193493 DOI: 10.1021/jacs.4c04402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
Synthetic side-on peroxide-bound dicopper(II) (SP) complexes are important for understanding the active site structure/function of many copper-containing enzymes. This work highlights the formation of new {CuII(μ-η2:η2-O22-)CuII} complexes (with electronic absorption and resonance Raman (rR) spectroscopic characterization) using tripodal N3ArOH ligands at -135 °C, which spontaneously participate in intramolecular phenolic H-atom abstraction (HAA). This results in the generation of bis(phenoxyl radical)bis(μ-OH)dicopper(II) intermediates, substantiated by their EPR/UV-vis/rR spectroscopic signatures and crystal structural determination of a diphenoquinone dicopper(I) complex derived from ligand para-C═C coupling. The newly observed chemistry in these ligand-Cu systems is discussed with respect to (a) our Cu-MeAN (tridentate N,N,N',N',N″-pentamethyldipropylenetriamine)-derived model SP species, which was unreactive toward exogenous monophenol addition (J. Am. Chem. Soc. 2012, 134, 8513-8524), emphasizing the impact of intramolecularly tethered ArOH groups, and (b) recent advances in understanding the mechanism of action of the tyrosinase (Ty) enzyme.
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Affiliation(s)
- Sanjib Panda
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Hai Phan
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Eleanor M Dunietz
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | | | - Pradip Kumar Hota
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Maxime A Siegler
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Anex Jose
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Mayukh Bhadra
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Edward I Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Kenneth D Karlin
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
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5
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Zhou X, Chen S, Qiu L, Liao L, Lu G, Yang S. How Rhizosphere Microbial Assemblage Is Influenced by Dragon Fruits with White and Red Flesh. PLANTS (BASEL, SWITZERLAND) 2024; 13:1346. [PMID: 38794417 PMCID: PMC11125021 DOI: 10.3390/plants13101346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2024] [Revised: 05/05/2024] [Accepted: 05/11/2024] [Indexed: 05/26/2024]
Abstract
The synthesis of betalain using microorganisms is an innovative developmental technology, and the excavation of microorganisms closely related to betalain can provide certain theoretical and technical support to this technology. In this study, the characteristics of soil microbial community structures and their functions in the rhizospheres of white-fleshed dragon fruit (Hylocereus undatus) and red-fleshed dragon fruit (Hylocereus polyrhizus) were analyzed. The results show that the soil bacterial and fungal compositions in the rhizospheres were shaped differently between H. undatus and H. polyrhizus. Bacterial genera such as Kribbella and TM7a were the unique dominant soil bacterial genera in the rhizospheres of H. undatus, whereas Bradyrhizobium was the unique dominant soil bacterial genus in the rhizospheres of H. polyrhizus. Additionally, Myrothecium was the unique dominant soil fungal genus in the rhizospheres of H. polyrhizus, whereas Apiotrichum and Arachniotus were the unique dominant soil fungal genera in the rhizospheres of H. undatus. Moreover, TM7a, Novibacillus, Cupriavidus, Mesorhizobium, Trechispora, Madurella, Cercophora, and Polyschema were significantly enriched in the rhizospheres of H. undatus, whereas Penicillium, Blastobotrys, Phialemonium, Marasmius, and Pseudogymnoascus were significantly enriched in the rhizospheres of H. polyrhizus. Furthermore, the relative abundances of Ascomycota and Penicillium were significantly higher in the rhizospheres of H. polyrhizus than in those of H. undatus.
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Affiliation(s)
- Xinyan Zhou
- Guangxi Key Laboratory of Agro-Environment and Agro-Products Safety, National Demonstration Center for Experimental Plant Science Education, Agricultural College, Guangxi University, Nanning 530004, China; (X.Z.); (S.C.); (L.Q.); (L.L.)
| | - Siyu Chen
- Guangxi Key Laboratory of Agro-Environment and Agro-Products Safety, National Demonstration Center for Experimental Plant Science Education, Agricultural College, Guangxi University, Nanning 530004, China; (X.Z.); (S.C.); (L.Q.); (L.L.)
| | - Lulu Qiu
- Guangxi Key Laboratory of Agro-Environment and Agro-Products Safety, National Demonstration Center for Experimental Plant Science Education, Agricultural College, Guangxi University, Nanning 530004, China; (X.Z.); (S.C.); (L.Q.); (L.L.)
| | - Liyuan Liao
- Guangxi Key Laboratory of Agro-Environment and Agro-Products Safety, National Demonstration Center for Experimental Plant Science Education, Agricultural College, Guangxi University, Nanning 530004, China; (X.Z.); (S.C.); (L.Q.); (L.L.)
| | - Guifeng Lu
- Horticulture Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China
| | - Shangdong Yang
- Guangxi Key Laboratory of Agro-Environment and Agro-Products Safety, National Demonstration Center for Experimental Plant Science Education, Agricultural College, Guangxi University, Nanning 530004, China; (X.Z.); (S.C.); (L.Q.); (L.L.)
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6
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Liu YH, Liao YT, Shao XD, Yang ZY, Li D, Liu L, Shao LD. Biomimetic Total Synthesis of Bimagnolignan: A Natural Anti-Breast Cancer Agent. Org Lett 2024; 26:2376-2380. [PMID: 38484337 DOI: 10.1021/acs.orglett.4c00378] [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: 04/02/2024]
Abstract
A short scalable biomimetic route to bioactive natural product bimagnolignan (1) was accomplished. Compound 1 was successfully prepared through a three-step metal-free synthesis from honokiol (2). Alternatively, 1 was also synthesized by biomimetic transformations that mimic tyrosinase in four steps. The key reactions feature a regioselective acetylation, a highly efficient C(sp2)-H oxidation, a cascade aerobic oxidative cyclization/coupling, and a Cu-catalyzed direct oxidative coupling. In addition, cell-based assays validate that 1 is a promising natural lead for HER2-positive breast cancer treatment.
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Affiliation(s)
- Yu-Hong Liu
- Yunnan Key Laboratory of Southern Medicinal Utilization, School of Chinese Materia Medica, Yunnan University of Chinese Medicine, Kunming, 650500, China
| | - Yu-Ting Liao
- Yunnan Key Laboratory of Southern Medicinal Utilization, School of Chinese Materia Medica, Yunnan University of Chinese Medicine, Kunming, 650500, China
| | - Xiao-Dan Shao
- Yunnan Key Laboratory of Southern Medicinal Utilization, School of Chinese Materia Medica, Yunnan University of Chinese Medicine, Kunming, 650500, China
| | - Zhu-Ya Yang
- Yunnan Key Laboratory of Southern Medicinal Utilization, School of Chinese Materia Medica, Yunnan University of Chinese Medicine, Kunming, 650500, China
| | - Dashan Li
- Yunnan Key Laboratory of Southern Medicinal Utilization, School of Chinese Materia Medica, Yunnan University of Chinese Medicine, Kunming, 650500, China
| | - Lu Liu
- Yunnan Key Laboratory of Southern Medicinal Utilization, School of Chinese Materia Medica, Yunnan University of Chinese Medicine, Kunming, 650500, China
| | - Li-Dong Shao
- Yunnan Key Laboratory of Southern Medicinal Utilization, School of Chinese Materia Medica, Yunnan University of Chinese Medicine, Kunming, 650500, China
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7
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Pham TN, Cazier EA, Gormally E, Lawrence P. Valorization of biomass polyphenols as potential tyrosinase inhibitors. Drug Discov Today 2024; 29:103843. [PMID: 38000718 DOI: 10.1016/j.drudis.2023.103843] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/08/2023] [Accepted: 11/17/2023] [Indexed: 11/26/2023]
Abstract
Tyrosinases (TYRs; EC 1.14.18.1) catalyze two sequential oxidative reactions of the melanin biosynthesis pathway and play an important role in mammalian pigmentation and enzymatic browning of fruit and vegetables. Inhibition of TYR activity is therefore an attractive target for new drugs and/or food ingredients. In addition, increasing evidence suggests that TYR regulation could be a novel target for treatments of cancer and Parkinson's disease. Biomasses, notably industrial byproducts and biowaste, are good sustainable sources of phytochemicals that may be valorized into bioactive compounds including TYR inhibitors. This review presents potential applications of biomass-derived polyphenols targeting TYR inhibition. Insights into structure-activity relationships of several polyphenols and their glycosides are highlighted. Finally, some remarks and perspectives on research into new TYR inhibitors from biomass waste are provided.
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Affiliation(s)
- Thanh-Nhat Pham
- UCLy (Lyon Catholic University), ESTBB, Lyon, France; UCLy (Lyon Catholic University), UR CONFLUENCE: Sciences et Humanités (EA 1598), Lyon, France.
| | - Elisabeth A Cazier
- UCLy (Lyon Catholic University), ESTBB, Lyon, France; UCLy (Lyon Catholic University), UR CONFLUENCE: Sciences et Humanités (EA 1598), Lyon, France; Nantes Université, Oniris, GEPEA, UMR 6144, F-44600 Saint-Nazaire, France
| | - Emmanuelle Gormally
- UCLy (Lyon Catholic University), ESTBB, Lyon, France; UCLy (Lyon Catholic University), UR CONFLUENCE: Sciences et Humanités (EA 1598), Lyon, France
| | - Philip Lawrence
- UCLy (Lyon Catholic University), ESTBB, Lyon, France; UCLy (Lyon Catholic University), UR CONFLUENCE: Sciences et Humanités (EA 1598), Lyon, France
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8
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Boateng ST, Roy T, Torrey K, Owunna U, Banang-Mbeumi S, Basnet D, Niedda E, Alexander AD, Hage DE, Atchimnaidu S, Nagalo BM, Aryal D, Findley A, Seeram NP, Efimova T, Sechi M, Hill RA, Ma H, Chamcheu JC, Murru S. Synthesis, in silico modelling, and in vitro biological evaluation of substituted pyrazole derivatives as potential anti-skin cancer, anti-tyrosinase, and antioxidant agents. J Enzyme Inhib Med Chem 2023; 38:2205042. [PMID: 37184042 PMCID: PMC10187093 DOI: 10.1080/14756366.2023.2205042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 04/16/2023] [Indexed: 05/16/2023] Open
Abstract
Twenty-five azole compounds (P1-P25) were synthesised using regioselective base-metal catalysed and microwave-assisted approaches, fully characterised by high-resolution mass spectrometry (HRMS), nuclear magnetic resonance (NMR), and infrared spectra (IR) analyses, and evaluated for anticancer, anti-tyrosinase, and anti-oxidant activities in silico and in vitro. P25 exhibited potent anticancer activity against cells of four skin cancer (SC) lines, with selectivity for melanoma (A375, SK-Mel-28) or non-melanoma (A431, SCC-12) SC cells over non-cancerous HaCaT-keratinocytes. Clonogenic, scratch-wound, and immunoblotting assay data were consistent with anti-proliferative results, expression profiling therewith implicating intrinsic and extrinsic apoptosis activation. In a mushroom tyrosinase inhibition assay, P14 was most potent among the compounds (half-maximal inhibitory concentration where 50% of cells are dead, IC50 15.9 μM), with activity greater than arbutin and kojic acid. Also, P6 exhibited noteworthy free radical-scavenging activity. Furthermore, in silico docking and absorption, distribution, metabolism, excretion, and toxicity (ADMET) simulations predicted prominent-phenotypic actives to engage diverse cancer/hyperpigmentation-related targets with relatively high affinities. Altogether, promising early-stage hits were identified - some with multiple activities - warranting further hit-to-lead optimisation chemistry with further biological evaluations, towards identifying new skin-cancer and skin-pigmentation renormalising agents.
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Affiliation(s)
- Samuel T. Boateng
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Tithi Roy
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Kara Torrey
- Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, Bioactive Botanical Research Laboratory, University of Rhode Island, Kingston, RI, USA
| | - Uchechi Owunna
- School of Sciences, College of Arts, Education and Sciences, University of Louisiana at Monroe, Monroe, LA, USA
| | - Sergette Banang-Mbeumi
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
- School of Nursing and Allied Health Sciences, Louisiana Delta Community College, Monroe, LA, USA
| | - David Basnet
- School of Sciences, College of Arts, Education and Sciences, University of Louisiana at Monroe, Monroe, LA, USA
| | - Eleonora Niedda
- Department of Medicine, Surgery and Pharmacy, University of Sassari, Sassari, Italy
| | - Alexis D. Alexander
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Denzel El Hage
- School of Sciences, College of Arts, Education and Sciences, University of Louisiana at Monroe, Monroe, LA, USA
| | - Siriki Atchimnaidu
- School of Sciences, College of Arts, Education and Sciences, University of Louisiana at Monroe, Monroe, LA, USA
| | - Bolni Marius Nagalo
- Department of Pathology, University of Arkansas for Medical Sciences (UAMS), Little Rock, AR, USA
- The Winthrop P. Rockefeller Cancer Institute, UAMS, Little Rock, AR, USA
| | - Dinesh Aryal
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
- Department of Biomedical Affairs and Research, Edward Via College of Osteopathic Medicine, Monroe, LA, USA
| | - Ann Findley
- School of Sciences, College of Arts, Education and Sciences, University of Louisiana at Monroe, Monroe, LA, USA
| | - Navindra P. Seeram
- Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, Bioactive Botanical Research Laboratory, University of Rhode Island, Kingston, RI, USA
| | - Tatiana Efimova
- Department of Biomedical Engineering, Northwestern University, Chicago, IL, USA
| | - Mario Sechi
- Department of Medicine, Surgery and Pharmacy, University of Sassari, Sassari, Italy
| | - Ronald A. Hill
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Hang Ma
- Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy, Bioactive Botanical Research Laboratory, University of Rhode Island, Kingston, RI, USA
| | - Jean Christopher Chamcheu
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Siva Murru
- School of Sciences, College of Arts, Education and Sciences, University of Louisiana at Monroe, Monroe, LA, USA
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9
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Liu HM, Tang W, Wang XY, Jiang JJ, Zhang Y, Liu QL, Wang W. Experimental and theoretical studies on inhibition against tyrosinase activity and melanin biosynthesis by antioxidant ergothioneine. Biochem Biophys Res Commun 2023; 682:163-173. [PMID: 37816300 DOI: 10.1016/j.bbrc.2023.10.007] [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: 07/19/2023] [Revised: 09/22/2023] [Accepted: 10/01/2023] [Indexed: 10/12/2023]
Abstract
Ergothioneine, a natural derivative of histidine with a thiol/thine tautomeric structure, exhibits exceptional antioxidant properties and inhibition activities on tyrosinase. In this study, enzyme kinetics experiments and chromatographic spectral analysis revealed that ergothioneine inhibited tyrosinase in a reversible and non-competitive manner, with an inhibition constant of 0.554 mg/mL (2.41 mM). As the concentration of ergothioneine increased, the extremely flexible loop structure of tyrosinase extended from 40.1 % to 41.0 %, effectively covering the active center or binding site. Theoretical molecular docking simulation results show that ergothioneine forms complexes with tyrosinase through hydrogen bonding and salt bridges in the active center of Cu ions. Additionally, it was observed that ergothioneine's antioxidant had a stronger reducing impact on dopaquinone, an intermediate in melanin production, than the effect of ascorbic acid at an equivalent concentration (0.5 mg/mL). Ergothioneine reduced the intracellular reactive oxygen species to lower levels than the control group without UVA radiation and regulated the proliferation and differentiation in B16-F10 melanocytes. Clinical trials have shown that a 0.1 % concentration of ergothioneine can effectively suppress melanin production in irradiated skin. The significant reduction in melanin index and an increase in the individual type angle (ITA°) degree were measured after 4 weeks. These results collectively suggest that ergothioneine may be a promising inhibitor of natural antioxidant tyrosinase. Furthermore, due to its safety and efficacy, ergothioneine could be considered one of the bioactive substances for further study on diseases related to melanin production and tyrosinase activity which is of great significance for the cosmetics, medicine and food industries.
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Affiliation(s)
- Hui-Min Liu
- School of Perfume & Aroma and Cosmetics, Shanghai Institute of Technology, Shanghai, 201418, China; Engineering Research Center of Perfume & Aroma and Cosmetics, Ministry of Education, Shanghai, 201418, China
| | - Wei Tang
- School of Perfume & Aroma and Cosmetics, Shanghai Institute of Technology, Shanghai, 201418, China
| | - Xiao-Yi Wang
- School of Perfume & Aroma and Cosmetics, Shanghai Institute of Technology, Shanghai, 201418, China
| | - Jing-Jing Jiang
- School of Perfume & Aroma and Cosmetics, Shanghai Institute of Technology, Shanghai, 201418, China
| | - Yun Zhang
- School of Perfume & Aroma and Cosmetics, Shanghai Institute of Technology, Shanghai, 201418, China
| | - Qing-Lei Liu
- School of Perfume & Aroma and Cosmetics, Shanghai Institute of Technology, Shanghai, 201418, China; Engineering Research Center of Perfume & Aroma and Cosmetics, Ministry of Education, Shanghai, 201418, China
| | - Wei Wang
- School of Perfume & Aroma and Cosmetics, Shanghai Institute of Technology, Shanghai, 201418, China; Engineering Research Center of Perfume & Aroma and Cosmetics, Ministry of Education, Shanghai, 201418, China.
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10
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Ricci F, Schira K, Khettabi L, Lombardo L, Mirabile S, Gitto R, Soler-Lopez M, Scheuermann J, Wolber G, De Luca L. Computational methods to analyze and predict the binding mode of inhibitors targeting both human and mushroom tyrosinase. Eur J Med Chem 2023; 260:115771. [PMID: 37657271 DOI: 10.1016/j.ejmech.2023.115771] [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: 05/29/2023] [Revised: 08/23/2023] [Accepted: 08/26/2023] [Indexed: 09/03/2023]
Abstract
Tyrosinase, a copper-containing enzyme critical in melanin biosynthesis, is a key drug target for hyperpigmentation and melanoma in humans. Testing the inhibitory effects of compounds using tyrosinase from Agaricus bisporus (AbTYR) has been a common practice to identify potential therapeutics from synthetic and natural sources. However, structural diversity among human tyrosinase (hTYR) and AbTYR presents a challenge in developing drugs that are therapeutically effective. In this study, we combined retrospective and computational analyses with experimental data to provide insights into the development of new inhibitors targeting both hTYR and AbTYR. We observed contrasting effects of Thiamidol™ and our 4-(4-hydroxyphenyl)piperazin-1-yl-derivative (6) on both enzymes; based on this finding, we aimed to investigate their binding modes in hTYR and AbTYR to identify residues that significantly improve affinity. All the information led to the discovery of compound [4-(4-hydroxyphenyl)piperazin-1-yl](2-methoxyphenyl)methanone (MehT-3, 7), which showed comparable activity on AbTYR (IC50 = 3.52 μM) and hTYR (IC50 = 5.4 μM). Based on these achievements we propose the exploitation of our computational results to provide relevant structural information for the development of newer dual-targeting molecules, which could be preliminarily tested on AbTYR as a rapid and inexpensive screening procedure before being tested on hTYR.
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Affiliation(s)
- Federico Ricci
- Department of Chemical, Biological, Pharmaceutical, and Environmental Sciences, University of Messina, Viale F. D'Alcontres 31, I-98166, Messina, Italy
| | - Kristina Schira
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zürich, 8093, Zürich, Switzerland
| | - Lyna Khettabi
- Structural Biology Group, European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000, Grenoble, France
| | - Lisa Lombardo
- Department of Chemical, Biological, Pharmaceutical, and Environmental Sciences, University of Messina, Viale F. D'Alcontres 31, I-98166, Messina, Italy
| | - Salvatore Mirabile
- Department of Chemical, Biological, Pharmaceutical, and Environmental Sciences, University of Messina, Viale F. D'Alcontres 31, I-98166, Messina, Italy
| | - Rosaria Gitto
- Department of Chemical, Biological, Pharmaceutical, and Environmental Sciences, University of Messina, Viale F. D'Alcontres 31, I-98166, Messina, Italy
| | - Montserrat Soler-Lopez
- Structural Biology Group, European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000, Grenoble, France
| | - Jörg Scheuermann
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zürich, 8093, Zürich, Switzerland
| | - Gerhard Wolber
- Molecular Design Lab, Institute of Pharmacy, Freie Universität Berlin, Königin-Luisestr. 2 + 4, 14195, Berlin, Germany
| | - Laura De Luca
- Department of Chemical, Biological, Pharmaceutical, and Environmental Sciences, University of Messina, Viale F. D'Alcontres 31, I-98166, Messina, Italy.
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11
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Mermer A, Demirci S. Recent advances in triazoles as tyrosinase inhibitors. Eur J Med Chem 2023; 259:115655. [PMID: 37482020 DOI: 10.1016/j.ejmech.2023.115655] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 07/10/2023] [Accepted: 07/13/2023] [Indexed: 07/25/2023]
Abstract
The tyrosinase enzyme, which is widely found in microorganisms, animals and plants, has a significant position in melanogenesis, plays an important role in undesirable browning of fruits and vegetables, antibiotic resistance, skin pigment formation, sclerotization of cuticle, neurodegeneration, etc. Therefore, with the wide potential application fields of tyrosinase in food, agriculture, cosmetics and pharmaceutical industries, which has become the target enzyme for the development of therapeutic agents such as antibrowning, anticancer, antibacterial, skin whitening, insecticides, etc., a large number of synthetic tyrosinase inhibitors have been widely reported in recent years. The triazole ring, which has a broad spectrum of biological action, is of increasing interest in the synthesis of new tyrosinase inhibitors. In this review, tyrosinase inhibition effects, structure-activity relationships, enzyme inhibition kinetics and mechanisms of action of 1,2,3- or 1,2,4-triazole derivatives were investigated. The data gathered is anticipated to supply rational guidance and an influential strategy for the development of novel, potent and safe tyrosinase inhibitors for better practical application in the future.
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Affiliation(s)
- Arif Mermer
- Experimental Medicine Application & Research Center, Validebağ Research Park, University of Health Sciences, İstanbul, Turkiye; Department of Biotechnology, University of Health Sciences, İstanbul, Turkiye.
| | - Serpil Demirci
- Department of Medical Services and Techniques, Vocational High School of Health Services, Giresun University, Giresun, Turkiye
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12
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Kipouros I, Stańczak A, Dunietz EM, Ginsbach JW, Srnec M, Rulíšek L, Solomon EI. Experimental Evidence and Mechanistic Description of the Phenolic H-Transfer to the Cu 2O 2 Active Site of oxy-Tyrosinase. J Am Chem Soc 2023; 145:22866-22870. [PMID: 37844210 PMCID: PMC10615789 DOI: 10.1021/jacs.3c07450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2023]
Abstract
Tyrosinase is a ubiquitous coupled binuclear copper enzyme that activates O2 toward the regioselective monooxygenation of monophenols to catechols via a mechanism that remains only partially defined. Here, we present new mechanistic insights into the initial steps of this monooxygenation reaction by employing a pre-steady-state, stopped-flow kinetics approach that allows for the direct measurement of the monooxygenation rates for a series of para-substituted monophenols by oxy-tyrosinase. The obtained biphasic Hammett plot and the associated solvent kinetic isotope effect values provide direct evidence for an initial H-transfer from the protonated phenolic substrate to the Cu2O2 core of oxy-tyrosinase. The correlation of these experimental results to quantum mechanics/molecular mechanics calculations provides a detailed mechanistic description of this H-transfer step. These new mechanistic insights revise and expand our fundamental understanding of Cu2O2 active sites in biology.
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Affiliation(s)
- Ioannis Kipouros
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Agnieszka Stańczak
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 2, 166 10, Praha 6, Czech Republic
- Faculty of Science, Charles University, Albertov 2038/6, 128 00 Praha 2, Czech Republic
| | - Eleanor M. Dunietz
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Jake W. Ginsbach
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Martin Srnec
- J. Heyrovský Institute of Physical Chemistry, Czech Academy of Sciences, Prague 182 23, Czech Republic
| | - Lubomír Rulíšek
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 2, 166 10, Praha 6, Czech Republic
| | - Edward I. Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
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13
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Arora S, Gupta P. Counter-Anions Rendered Weak-Interactions Perturb the Stability of Tyrosinase-Mimicked Peroxo-Dicopper(II) Active Site: Unraveling Computational Indicators. Chem Asian J 2023; 18:e202300688. [PMID: 37679940 DOI: 10.1002/asia.202300688] [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: 08/07/2023] [Revised: 09/06/2023] [Accepted: 09/07/2023] [Indexed: 09/09/2023]
Abstract
It has been observed in literature that the stability of tyrosinase-mimicked μ-η2 :η2 -peroxo-dicopper(II) (P) can be perturbed in presence of counter-anions (CAs) such as PhCO2 - , CF3 SO3 - , TsO- and SbF6 - . In this work, we unravel computational indicators using density functional theory to screen and study the stability of P in experimentally-reported cases. These indicators are Gibbs energies, geometrical parameters such as distances and angles, independent gradient model based on Hirshfeld partition (IGMH) generated data, orbitals' overlap, and distortion-interaction (DI) energies. Our DFT computed Gibbs energies indicate that P is stable in case of PhCO2 - and TsO- . CF3 SO3 - allows P and its isoelectronic species bis-μ-oxo-dicopper (O) to coexist. SbF6 - shows that O is in excess. Our indicators reveal that the stability of P in case of PhCO2 - and TsO- is due to the better placing of P and its CA, thus leading to better interactions and overlap of orbitals. Other indicator displays that the plane of Cu2 O2 core in P is more bend in PhCO2 - and TsO- cases as compared to the plane in the other two cases. In addition, the IGMH-based indicator displays higher values in the case of PhCO2 - and TsO- than the other CAs.
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Affiliation(s)
- Sumangla Arora
- Computational Catalysis Center, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India
| | - Puneet Gupta
- Computational Catalysis Center, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India
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14
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Panis F, Rompel A. Biochemical Investigations of Five Recombinantly Expressed Tyrosinases Reveal Two Novel Mechanisms Impacting Carbon Storage in Wetland Ecosystems. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:13863-13873. [PMID: 37656057 PMCID: PMC10515480 DOI: 10.1021/acs.est.3c02910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 07/23/2023] [Accepted: 07/24/2023] [Indexed: 09/02/2023]
Abstract
Wetlands are globally distributed ecosystems characterized by predominantly anoxic soils, resulting from water-logging. Over the past millennia, low decomposition rates of organic matter led to the accumulation of 20-30% of the world's soil carbon pool in wetlands. Phenolic compounds are critically involved in stabilizing wetland carbon stores as they act as broad-scale inhibitors of hydrolytic enzymes. Tyrosinases are oxidoreductases capable of removing phenolic compounds in the presence of O2 by oxidizing them to the corresponding o-quinones. Herein, kinetic investigations (kcat and Km values) reveal that low-molecular-weight phenolic compounds naturally present within wetland ecosystems (including monophenols, diphenols, triphenols, and flavonoids) are accepted by five recombinantly expressed wetland tyrosinases (TYRs) as substrates. Investigations of the interactions between TYRs and wetland phenolics reveal two novel mechanisms that describe the global impact of TYRs on the wetland carbon cycle. First, it is shown that o-quinones (produced by TYRs from low-molecular-weight phenolic substrates) are capable of directly inactivating hydrolytic enzymes. Second, it is reported that o-quinones can interact with high-molecular-weight phenolic polymers (which inhibit hydrolytic enzymes) and remove them through precipitation. The balance between these two mechanisms will profoundly affect the fate of wetland carbon stocks, particularly in the wake of climate change.
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Affiliation(s)
- Felix Panis
- Universität
Wien, Fakultät für Chemie, Institut für Biophysikalische
Chemie, Josef-Holaubek-Platz
2, 1090 Wien, Austria, https://www.bpc.univie.ac.at/en/
| | - Annette Rompel
- Universität
Wien, Fakultät für Chemie, Institut für Biophysikalische
Chemie, Josef-Holaubek-Platz
2, 1090 Wien, Austria, https://www.bpc.univie.ac.at/en/
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15
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Nguyen BX, VandeVen W, MacNeil GA, Zhou W, Paterson AR, Walsby CJ, Chiang L. High-Valent Ni and Cu Complexes of a Tetraanionic Bis(amidateanilido) Ligand. Inorg Chem 2023; 62:15180-15194. [PMID: 37676794 DOI: 10.1021/acs.inorgchem.3c02358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
High-valent metal species are often invoked as intermediates during enzymatic and synthetic catalytic cycles. Anionic donors are often required to stabilize such high-valent states by forming strong bonds with the Lewis acidic metal centers while decreasing their oxidation potentials. In this report, we discuss the synthesis of two high-valent metal complexes [ML]+ in which the NiIII and CuIII centers are ligated by a new tetradentate, tetraanionic bis(amidateanilido) ligand. [ML]+, obtained via chemical oxidation of ML, exhibits UV-vis-NIR, EPR, and XANES spectra characteristic of square planar, high-valent MIII species, suggesting the locus of oxidation for both [ML]+ is predominantly metal-based. This is supported by theoretical analyses, which also support the observed visible transitions as ligand-to-metal charge transfer transitions characteristic of square planar, high-valent MIII species. Notably, [ML]+ can also be obtained via O2 oxidation of ML due to its remarkably negative oxidation potentials (CuL/[CuL]+: -1.16 V, NiL/[NiL]+: -1.01 V vs Fc/Fc+ in MeCN). This demonstrates the exceptionally strong donating nature of the tetraanionic bis(amidateanilido) ligation and its ability to stabilize high-valent metal centers..
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Affiliation(s)
- Bach X Nguyen
- Department of Chemistry, University of the Fraser Valley, Abbotsford, British Columbia V2S 7M8, Canada
- Department of Chemistry, Simon Fraser University, Burnaby, British Columba V5A 1S6, Canada
| | - Warren VandeVen
- Department of Chemistry, Simon Fraser University, Burnaby, British Columba V5A 1S6, Canada
| | - Gregory A MacNeil
- Department of Chemistry, Simon Fraser University, Burnaby, British Columba V5A 1S6, Canada
| | - Wen Zhou
- Department of Chemistry, Simon Fraser University, Burnaby, British Columba V5A 1S6, Canada
| | - Alisa R Paterson
- Canadian Light Source, 44 Innovation Boulevard, Saskatoon, Saskatchewan S7N 2 V3, Canada
| | - Charles J Walsby
- Department of Chemistry, Simon Fraser University, Burnaby, British Columba V5A 1S6, Canada
| | - Linus Chiang
- Department of Chemistry, University of the Fraser Valley, Abbotsford, British Columbia V2S 7M8, Canada
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16
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Fekry M, Dave KK, Badgujar D, Hamnevik E, Aurelius O, Dobritzsch D, Danielson UH. The Crystal Structure of Tyrosinase from Verrucomicrobium spinosum Reveals It to Be an Atypical Bacterial Tyrosinase. Biomolecules 2023; 13:1360. [PMID: 37759761 PMCID: PMC10526336 DOI: 10.3390/biom13091360] [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: 07/03/2023] [Revised: 09/01/2023] [Accepted: 09/04/2023] [Indexed: 09/29/2023] Open
Abstract
Tyrosinases belong to the type-III copper enzyme family, which is involved in melanin production in a wide range of organisms. Despite similar overall characteristics and functions, their structures, activities, substrate specificities and regulation vary. The tyrosinase from the bacterium Verrucomicrobium spinosum (vsTyr) is produced as a pre-pro-enzyme in which a C-terminal extension serves as an inactivation domain. It does not require a caddie protein for copper ion incorporation, which makes it similar to eukaryotic tyrosinases. To gain an understanding of the catalytic machinery and regulation of vsTyr activity, we determined the structure of the catalytically active "core domain" of vsTyr by X-ray crystallography. The analysis showed that vsTyr is an atypical bacterial tyrosinase not only because it is independent of a caddie protein but also because it shows the highest structural (and sequence) similarity to plant-derived members of the type-III copper enzyme family and is more closely related to fungal tyrosinases regarding active site features. By modelling the structure of the pre-pro-enzyme using AlphaFold, we observed that Phe453, located in the C-terminal extension, is appropriately positioned to function as a "gatekeeper" residue. Our findings raise questions concerning the evolutionary origin of vsTyr.
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Affiliation(s)
- Mostafa Fekry
- Department of Chemistry—BMC, Uppsala University, SE 751 23 Uppsala, Sweden; (M.F.); (K.K.D.); (D.B.); (E.H.); (D.D.)
- Biophysics Department, Faculty of Science, Cairo University, Giza 12613, Egypt
| | - Khyati K. Dave
- Department of Chemistry—BMC, Uppsala University, SE 751 23 Uppsala, Sweden; (M.F.); (K.K.D.); (D.B.); (E.H.); (D.D.)
| | - Dilip Badgujar
- Department of Chemistry—BMC, Uppsala University, SE 751 23 Uppsala, Sweden; (M.F.); (K.K.D.); (D.B.); (E.H.); (D.D.)
| | - Emil Hamnevik
- Department of Chemistry—BMC, Uppsala University, SE 751 23 Uppsala, Sweden; (M.F.); (K.K.D.); (D.B.); (E.H.); (D.D.)
| | | | - Doreen Dobritzsch
- Department of Chemistry—BMC, Uppsala University, SE 751 23 Uppsala, Sweden; (M.F.); (K.K.D.); (D.B.); (E.H.); (D.D.)
| | - U. Helena Danielson
- Department of Chemistry—BMC, Uppsala University, SE 751 23 Uppsala, Sweden; (M.F.); (K.K.D.); (D.B.); (E.H.); (D.D.)
- Science for Life Laboratory, Drug Discovery & Development Platform, Uppsala University, SE 751 23 Uppsala, Sweden
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17
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Ho YT, Liu IH, Chang ST, Wang SY, Chang HT. In Vitro and In Vivo Antimelanogenesis Effects of Leaf Essential Oil from Agathis dammara. Pharmaceutics 2023; 15:2269. [PMID: 37765238 PMCID: PMC10536972 DOI: 10.3390/pharmaceutics15092269] [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: 08/04/2023] [Revised: 08/28/2023] [Accepted: 08/30/2023] [Indexed: 09/29/2023] Open
Abstract
Agathis species are widely distributed around Southeast Asia, Australasia, South Pacific islands, and etc. Traditionally, Agathis species have been used as the folk medicines, the common ethnopharmacological uses of Agathis genus are the treatments of headache and myalgia. This study aims to investigate the chemical composition of Agathis dammara (Lamb.) Rich. leaf essential oil and to explore its antimelanogenesis effect. The chemical constituents of leaf essential oil are analyzed using gas chromatography-mass spectrometry (GC-MS), the major constituents of leaf essential oil are sesquiterpenoids. The major constituents are δ-cadinene (16.12%), followed by γ-gurjunene (15.57%), 16-kaurene (12.43%), β-caryophyllene (8.58%), germacrene D (8.53%), and γ-cadinene (5.33%). As for the in vitro antityrosinase activity, leaf essential oil inhibit the tyrosinase activity of mushroom when the substrate is 3,4-dihydroxyphenylalanine (L-DOPA). Leaf essential oil prevents tyrosinase from acting as diphenolase and catalyzing L-DOPA to dopaquinone, and converting into dark melanin pigments. A. dammara leaf essential oil also exhibits the in vivo antimelanogenesis effect, leaf essential oil reduces 43.48% of melanin formation in zebrafish embryos at the concentration of 50 μg/mL. Results reveal A. dammara leaf essential oil has the potential for developing the skin whitening drug and depigmentation ingredient for hyperpigmentary disorders.
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Affiliation(s)
- Yu-Tung Ho
- School of Forestry and Resource Conservation, National Taiwan University, Taipei 10617, Taiwan; (Y.-T.H.); (S.-T.C.)
| | - I-Hsuan Liu
- Department of Animal Science and Technology, National Taiwan University, Taipei 10617, Taiwan;
| | - Shang-Tzen Chang
- School of Forestry and Resource Conservation, National Taiwan University, Taipei 10617, Taiwan; (Y.-T.H.); (S.-T.C.)
| | - Sheng-Yang Wang
- Department of Forestry, National Chung Hsing University, Taichung 40227, Taiwan;
- Special Crop and Metabolome Discipline Cluster, Academy Circle Economy, National Chung Hsing University, Taichung 40227, Taiwan
| | - Hui-Ting Chang
- School of Forestry and Resource Conservation, National Taiwan University, Taipei 10617, Taiwan; (Y.-T.H.); (S.-T.C.)
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18
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Dalhoff R, Schmidt R, Steeb L, Rabatinova K, Witte M, Teeuwen S, Benjamaâ S, Hüppe H, Hoffmann A, Herres-Pawlis S. The bridge towards a more stable and active side-on-peroxido (Cu 2II(µ-η 2:η 2-O 2)) complex as a tyrosinase model system. Faraday Discuss 2023; 244:134-153. [PMID: 37132380 DOI: 10.1039/d2fd00162d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A novel dinucleating bis(pyrazolyl)methane ligand was developed for tyrosinase model systems. After ligand synthesis, the corresponding Cu(I) complex was synthesized and upon oxygenation, formation of a µ-η2:η2 peroxido complex could be observed and monitored using UV/Vis-spectroscopy. Due to the high stability of this species even at room temperature, a molecular structure of the complex could be characterized via single-crystal XRD. Additional to its promising stability, the peroxido complex showed catalytic tyrosinase activity which was investigated via UV/Vis-spectroscopy. Products of the catalytic conversion could be isolated and characterized and the ligand could be successfully recycled after catalysis experiments. Furthermore, the peroxido complex was reduced by reductants with different reduction potentials. The characteristics of the electron transfer reactions were investigated with the help of the Marcus relation. The combination of the high stability and catalytic activity of the peroxido complex with the new dinucleating ligand, enables the shift of oxygenation reactions for selected substrates towards green chemistry, which is furthered by the efficient ligand recycling capability.
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Affiliation(s)
- Rosalie Dalhoff
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Regina Schmidt
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Lena Steeb
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Kristina Rabatinova
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Matthias Witte
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Simon Teeuwen
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Salim Benjamaâ
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Henrika Hüppe
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Alexander Hoffmann
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
| | - Sonja Herres-Pawlis
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074 Aachen, Germany.
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19
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Li Z, Zhao C, Li D, Wang L. Enhancing the thermostability of Streptomyces cyaneofuscatus strain Ms1 tyrosinase by multi-factors rational design and molecular dynamics simulations. PLoS One 2023; 18:e0288929. [PMID: 37471348 PMCID: PMC10358999 DOI: 10.1371/journal.pone.0288929] [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: 04/17/2023] [Accepted: 07/07/2023] [Indexed: 07/22/2023] Open
Abstract
This study presents a multi-factor rational design strategy combined with molecular dynamics simulation to improve the thermostability of Streptomyces cyaneofuscatus strain Ms1 tyrosinase. Candidate mutation sites were identified using Discovery Studio and FoldX software, and the double mutant G124W/G137W was obtained. The mutant was heterogeneously expressed in Escherichia coli strain Rosetta2 (DE3), and its thermostability was verified. Results indicate that the rational design method, combined with molecular dynamics simulation and protein energy calculation, improved the enzyme's thermostability more accurately and effectively. The double mutant G124W/G137W had an optimum temperature of 60°C, about 5.0°C higher than that of the wild-type TYRwt, and its activity was 171.06% higher than the wild-type TYRwt. Its thermostability was enhanced, 42.78% higher than the wild-type at 50°C. These findings suggest that the rational design strategy applied in this study can facilitate the application of industrial enzymes in the pharmaceutical industry.
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Affiliation(s)
- Zhengtao Li
- School of Pharmacy, Qingdao University, Qingdao City, Shandong Province, China
| | - Chen Zhao
- School of Pharmacy, Chengdu University, Chengdu City, Sichuan Province, China
| | - Duanhua Li
- School of Pharmacy, Chengdu University, Chengdu City, Sichuan Province, China
| | - Lu Wang
- School of Pharmacy, Qingdao University, Qingdao City, Shandong Province, China
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20
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Buitrago E, Faure C, Carotti M, Bergantino E, Hardré R, Maresca M, Philouze C, Vanthuyne N, Boumendjel A, Bubacco L, du Moulinet d'Hardemare A, Jamet H, Réglier M, Belle C. Exploiting HOPNO-dicopper center interaction to development of inhibitors for human tyrosinase. Eur J Med Chem 2023; 248:115090. [PMID: 36634457 DOI: 10.1016/j.ejmech.2023.115090] [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: 05/24/2022] [Revised: 06/23/2022] [Accepted: 01/03/2023] [Indexed: 01/05/2023]
Abstract
In human, Tyrosinase enzyme (TyH) is involved in the key steps of protective pigments biosynthesis (in skin, eyes and hair). The use of molecules targeting its binuclear copper active site represents a relevant strategy to regulate TyH activities. In this work, we targeted 2-Hydroxypyridine-N-oxide analogs (HOPNO, an established chelating group for the tyrosinase dicopper active site) with the aim to combine effects induced by combination with a reference inhibitor (kojic acid) or natural substrate (tyrosine). The HOPNO-MeOH (3) and the racemic amino acid HOPNO-AA compounds (11) were tested on purified tyrosinases from different sources (fungal, bacterial and human) for comparison purposes. Both compounds have more potent inhibitory activities than the parent HOPNO moiety and display strictly competitive inhibition constant, in particular with human tyrosinase. Furthermore, 11 appears to be the most active on the B16-F1 mammal melanoma cells. The investigations were completed by stereospecificity analysis. Racemic mixture of the fully protected amino acid 10 was separated by chiral HPLC into the corresponding enantiomers. Assignment of the absolute configuration of the deprotected compounds was completed, based on X-ray crystallography. The inhibition activities on melanin production were tested on lysates and whole human melanoma MNT-1 cells. Results showed significant enhancement of the inhibitory effects for the (S) enantiomer compared to the (R) enantiomer. Computational studies led to an explanation of this difference of activity based for both enantiomers on the respective position of the amino acid group versus the HOPNO plane.
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Affiliation(s)
- Elina Buitrago
- University of Grenoble Alpes, CNRS-UGA UMR 5250, DCM, CS 40700, 38058, Grenoble, Cedex 9, France; University of Grenoble Alpes, CNRS-UGA UMR 5063, DPM CS 40700, 38058, Grenoble, Cedex 9, France
| | - Clarisse Faure
- University of Grenoble Alpes, CNRS-UGA UMR 5250, DCM, CS 40700, 38058, Grenoble, Cedex 9, France
| | - Marcello Carotti
- Department of Biology, University of Padova, Via Ugo Bassi 58b, 35121, Padova, Italy
| | - Elisabetta Bergantino
- Department of Biology, University of Padova, Via Ugo Bassi 58b, 35121, Padova, Italy
| | - Renaud Hardré
- Aix Marseille University, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Marc Maresca
- Aix Marseille University, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Christian Philouze
- University of Grenoble Alpes, CNRS-UGA UMR 5250, DCM, CS 40700, 38058, Grenoble, Cedex 9, France
| | - Nicolas Vanthuyne
- Aix Marseille University, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Ahcène Boumendjel
- University of Grenoble Alpes, CNRS-UGA UMR 5063, DPM CS 40700, 38058, Grenoble, Cedex 9, France
| | - Luigi Bubacco
- Department of Biology, University of Padova, Via Ugo Bassi 58b, 35121, Padova, Italy
| | | | - Hélène Jamet
- University of Grenoble Alpes, CNRS-UGA UMR 5250, DCM, CS 40700, 38058, Grenoble, Cedex 9, France
| | - Marius Réglier
- Aix Marseille University, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Catherine Belle
- University of Grenoble Alpes, CNRS-UGA UMR 5250, DCM, CS 40700, 38058, Grenoble, Cedex 9, France.
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21
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Kipouros I, Solomon EI. New mechanistic insights into coupled binuclear copper monooxygenases from the recent elucidation of the ternary intermediate of tyrosinase. FEBS Lett 2023; 597:65-78. [PMID: 36178078 PMCID: PMC9839588 DOI: 10.1002/1873-3468.14503] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 09/16/2022] [Accepted: 09/20/2022] [Indexed: 01/17/2023]
Abstract
Tyrosinase is the most predominant member of the coupled binuclear copper (CBC) protein family. The recent trapping and spectroscopic definition of the elusive catalytic ternary intermediate (enzyme/O2 /monophenol) of tyrosinase dictates a monooxygenation mechanism that revises previous proposals and involves cleavage of the μ-η2 :η2 -peroxide dicopper(II) O-O bond to accept the phenolic proton, followed by monophenolate coordination to copper concomitant with aromatic hydroxylation by the non-protonated μ-oxo. Here, we compare and contrast previously proposed and current mechanistic models for monophenol monooxygenation of tyrosinase. Next, we discuss how these recent insights provide new opportunities towards uncovering structure-function relationships in CBC enzymes, as well as understanding fundamental principles for O2 activation and reactivity by bioinorganic active sites.
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Affiliation(s)
| | - Edward I Solomon
- Department of Chemistry, Stanford University, CA, USA
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, CA, USA
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22
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Papaemmanouil CD, Peña-García J, Banegas-Luna AJ, Kostagianni AD, Gerothanassis IP, Pérez-Sánchez H, Tzakos AG. ANTIAGE-DB: A Database and Server for the Prediction of Anti-Aging Compounds Targeting Elastase, Hyaluronidase, and Tyrosinase. Antioxidants (Basel) 2022; 11:antiox11112268. [PMID: 36421454 PMCID: PMC9686885 DOI: 10.3390/antiox11112268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 11/03/2022] [Accepted: 11/09/2022] [Indexed: 11/18/2022] Open
Abstract
Natural products bear a multivariate biochemical profile with antioxidant, anti-inflammatory, antibacterial, and antitumoral properties. Along with their natural sources, they have been widely used both as anti-aging and anti-melanogenic agents due to their effective contribution in the elimination of reactive oxygen species (ROS) caused by oxidative stress. Their anti-aging activity is mainly related to their capacity of inhibiting enzymes like Human Neutrophil Elastase (HNE), Hyaluronidase (Hyal) and Tyrosinase (Tyr). Herein, we accumulated literature information (covering the period 1965–2020) on the inhibitory activity of natural products and their natural sources towards these enzymes. To navigate this information, we developed a database and server termed ANTIAGE-DB that allows the prediction of the anti-aging potential of target compounds. The server operates in two axes. First a comparison of compounds by shape similarity can be performed against our curated database of natural products whose inhibitory potential has been established in the literature. In addition, inverse virtual screening can be performed for a chosen molecule against the three targeted enzymes. The server is open access, and a detailed report with the prediction results is emailed to the user. ANTIAGE-DB could enable researchers to explore the chemical space of natural based products, but is not limited to, as anti-aging compounds and can predict their anti-aging potential. ANTIAGE-DB is accessed online.
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Affiliation(s)
- Christina D. Papaemmanouil
- Department of Chemistry, Section of Organic Chemistry and Biochemistry, University of Ioannina, 45110 Ioannina, Greece
| | - Jorge Peña-García
- Structural Bioinformatics and High Performance Computing Research Group (BIO-HPC), Computer Engineering Department, Universidad Católica de Murcia (UCAM), 30107 Guadalupe, Spain
| | - Antonio Jesús Banegas-Luna
- Structural Bioinformatics and High Performance Computing Research Group (BIO-HPC), Computer Engineering Department, Universidad Católica de Murcia (UCAM), 30107 Guadalupe, Spain
| | - Androniki D. Kostagianni
- Department of Chemistry, Section of Organic Chemistry and Biochemistry, University of Ioannina, 45110 Ioannina, Greece
| | - Ioannis P. Gerothanassis
- Department of Chemistry, Section of Organic Chemistry and Biochemistry, University of Ioannina, 45110 Ioannina, Greece
| | - Horacio Pérez-Sánchez
- Structural Bioinformatics and High Performance Computing Research Group (BIO-HPC), Computer Engineering Department, Universidad Católica de Murcia (UCAM), 30107 Guadalupe, Spain
- Correspondence: (H.P.-S.); (A.G.T.)
| | - Andreas G. Tzakos
- Department of Chemistry, Section of Organic Chemistry and Biochemistry, University of Ioannina, 45110 Ioannina, Greece
- Institute of Materials Science and Computing, University Research Center of Ioannina (URCI), 45110 Ioannina, Greece
- Correspondence: (H.P.-S.); (A.G.T.)
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23
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Cao S, Wang D, Cheng R, Shi W, Zhang Q, Zeng H, Chen J. Modulation of the lipophilicity and molecular size of thiosemicarbazone inhibitors to regulate tyrosinase activity. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 281:121590. [PMID: 35850043 DOI: 10.1016/j.saa.2022.121590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 06/26/2022] [Accepted: 07/01/2022] [Indexed: 06/15/2023]
Abstract
A group of 5-methylsalicylaldehyde thiosemicarbazone derivatives (HMTs) bearing different lipophilic and steric substituents attached at the 3-position of cresol ring were synthesized and investigated as mushroom tyrosinase (TYR) inhibitors. The ability of HMTs to inhibit the diphenolase activity of TYR was evaluated with L-DOPA as substrate by determining IC50 values in relation to their structure modifications. HMTs displayed distinct inhibitory competencies towards TYR activity with IC50 values in the range of 1.02-143.56 μM. A close correlation between their inhibition potency and both lipophilicity and molecular size was observed. The inhibitory effect of the hydroxyethyl-containing derivatives was much higher than the hydroxyethyl-free ones overall. Among them, HMT-NBO exhibited the most potent effect with IC50 of 5.85 μM, which was nearly 25-fold and 3.8-fold lower than its parent HMT-NBE and the control kojic acid, respectively. The hydroxyethyl clearly benefited the improvement of the inhibitory competences and acted as a regulating group of lipophilicity of the inhibitors. The kinetic analyses showed that HMTs were reversible and mixed type inhibitors against mushroom TYR. The inhibition mechanism was studied by means of fluorescence spectroscopy, FT-IR, ESI-MS and molecular docking analysis. The results indicated that the observed inhibitory effect of HMTs was accomplished by acting on the amino acid residues rather than by chelating the centre copper ions of TYR. Each of HMTs can insert the hydrophobic pocket and interact with the residues of TYR through Van der Waals forces and hydrogen bonds, with additional electrostatic interactions for HMT-NEE and HMT-NEO further strengthening the affinity. Meanwhile, the inhibitors were observed to bind with L-DOPA or/and L-DOPAquinone forming 1:1 stoichiometric complexes, probably exerting indirect inhibition against TYR activity.
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Affiliation(s)
- Shuhong Cao
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Jianjun East Rd. 211, Yancheng 224051, PR China
| | - Dandan Wang
- Industrial Technology Research Academy, Yancheng Institute of Technology, Jianjun East Rd. 211, Yancheng 224051, PR China
| | - Run Cheng
- Industrial Technology Research Academy, Yancheng Institute of Technology, Jianjun East Rd. 211, Yancheng 224051, PR China
| | - Wenyan Shi
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Jianjun East Rd. 211, Yancheng 224051, PR China
| | - Qinfang Zhang
- Industrial Technology Research Academy, Yancheng Institute of Technology, Jianjun East Rd. 211, Yancheng 224051, PR China.
| | - Huajin Zeng
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, PR China.
| | - Jingwen Chen
- Industrial Technology Research Academy, Yancheng Institute of Technology, Jianjun East Rd. 211, Yancheng 224051, PR China; School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Jianjun East Rd. 211, Yancheng 224051, PR China.
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24
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Panis F, Rompel A. The Novel Role of Tyrosinase Enzymes in the Storage of Globally Significant Amounts of Carbon in Wetland Ecosystems. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:11952-11968. [PMID: 35944157 PMCID: PMC9454253 DOI: 10.1021/acs.est.2c03770] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 07/01/2022] [Accepted: 07/05/2022] [Indexed: 05/30/2023]
Abstract
Over the last millennia, wetlands have been sequestering carbon from the atmosphere via photosynthesis at a higher rate than releasing it and, therefore, have globally accumulated 550 × 1015 g of carbon, which is equivalent to 73% of the atmospheric carbon pool. The accumulation of organic carbon in wetlands is effectuated by phenolic compounds, which suppress the degradation of soil organic matter by inhibiting the activity of organic-matter-degrading enzymes. The enzymatic removal of phenolic compounds by bacterial tyrosinases has historically been blocked by anoxic conditions in wetland soils, resulting from waterlogging. Bacterial tyrosinases are a subgroup of oxidoreductases that oxidatively remove phenolic compounds, coupled to the reduction of molecular oxygen to water. The biochemical properties of bacterial tyrosinases have been investigated thoroughly in vitro within recent decades, while investigations focused on carbon fluxes in wetlands on a macroscopic level have remained a thriving yet separated research area so far. In the wake of climate change, however, anoxic conditions in wetland soils are threatened by reduced rainfall and prolonged summer drought. This potentially allows tyrosinase enzymes to reduce the concentration of phenolic compounds, which in turn will increase the release of stored carbon back into the atmosphere. To offer compelling evidence for the novel concept that bacterial tyrosinases are among the key enzymes influencing carbon cycling in wetland ecosystems first, bacterial organisms indigenous to wetland ecosystems that harbor a TYR gene within their respective genome (tyr+) have been identified, which revealed a phylogenetically diverse community of tyr+ bacteria indigenous to wetlands based on genomic sequencing data. Bacterial TYR host organisms covering seven phyla (Acidobacteria, Actinobacteria, Bacteroidetes, Firmicutes, Nitrospirae, Planctomycetes, and Proteobacteria) have been identified within various wetland ecosystems (peatlands, marshes, mangrove forests, bogs, and alkaline soda lakes) which cover a climatic continuum ranging from high arctic to tropic ecosystems. Second, it is demonstrated that (in vitro) bacterial TYR activity is commonly observed at pH values characteristic for wetland ecosystems (ranging from pH 3.5 in peatlands and freshwater swamps to pH 9.0 in soda lakes and freshwater marshes) and toward phenolic compounds naturally present within wetland environments (p-coumaric acid, gallic acid, protocatechuic acid, p-hydroxybenzoic acid, caffeic acid, catechin, and epicatechin). Third, analyzing the available data confirmed that bacterial host organisms tend to exhibit in vitro growth optima at pH values similar to their respective wetland habitats. Based on these findings, it is concluded that, following increased aeration of previously anoxic wetland soils due to climate change, TYRs are among the enzymes capable of reducing the concentration of phenolic compounds present within wetland ecosystems, which will potentially destabilize vast amounts of carbon stored in these ecosystems. Finally, promising approaches to mitigate the detrimental effects of increased TYR activity in wetland ecosystems and the requirement of future investigations of the abundance and activity of TYRs in an environmental setting are presented.
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25
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Daugavet MA, Dobrynina MI, Shaposhnikova TG, Solovyeva AI, Mittenberg AG, Shabelnikov SV, Babkina IY, Grinchenko AV, Ilyaskina DV, Podgornaya OI. New putative phenol oxidase in ascidian blood cells. Sci Rep 2022; 12:14326. [PMID: 35995990 PMCID: PMC9395347 DOI: 10.1038/s41598-022-18283-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 08/09/2022] [Indexed: 11/13/2022] Open
Abstract
The phenol oxidase system is ancient and ubiquitously distributed in all living organisms. In various groups it serves for the biosynthesis of pigments and neurotransmitters (dopamine), defence reactions and tissue hardening. Ascidians belong to subphylum Tunicata, which is considered the closest living relative to Vertebrates. Two phenol oxidases previously described for ascidians are vertebrate-like and arthropod-like phenol oxidases. In our present study, we described a new ascidian protein, Tuphoxin, with putative phenol oxidase function, which bears no sequence similarity with two enzymes described previously. The closest related proteins to Tuphoxin are mollusc haemocyanins. Unlike haemocyanins, which are oxygen transporting plasma proteins, Tuphoxin is synthesised in ascidian blood cells and secreted in the extracellular matrix of the tunic—ascidian outer coverings. Single mature transcript coding for this phenol oxidase can give several protein products of different sizes. Thus limited proteolysis of the initial protein is suggested. A unique feature of Tuphoxins and their homologues among Tunicata is the presence of thrombospondin first type repeats (TSP1) domain in their sequence which is supposed to provide interaction with extracellular matrix. The finding of TSP1 in the structure of phenol oxidases is new and we consider this to be an innovation of Tunicata evolutionary lineage.
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Affiliation(s)
- M A Daugavet
- Institute of Cytology of Russian Academy of Sciences, St. Petersburg, Russia.
| | - M I Dobrynina
- Institute of Cytology of Russian Academy of Sciences, St. Petersburg, Russia
| | | | - A I Solovyeva
- Institute of Cytology of Russian Academy of Sciences, St. Petersburg, Russia.,Zoological Institute of Russian Academy of Sciences, St. Petersburg, Russia
| | - A G Mittenberg
- Institute of Cytology of Russian Academy of Sciences, St. Petersburg, Russia
| | - S V Shabelnikov
- Institute of Cytology of Russian Academy of Sciences, St. Petersburg, Russia
| | - I Yu Babkina
- Saint-Petersburg State University, St. Petersburg, Russia
| | - A V Grinchenko
- A.V. Zhirmunsky National Scientific Center of Marine Biology, Vladivostok, Russia
| | - D V Ilyaskina
- A.V. Zhirmunsky National Scientific Center of Marine Biology, Vladivostok, Russia.,Vrije Universiteit Amsterdam, 1081 HV, Amsterdam, The Netherlands
| | - O I Podgornaya
- Institute of Cytology of Russian Academy of Sciences, St. Petersburg, Russia.,Saint-Petersburg State University, St. Petersburg, Russia
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26
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Kipouros I, Stańczak A, Ginsbach JW, Andrikopoulos PC, Rulíšek L, Solomon EI. Elucidation of the tyrosinase/O 2/monophenol ternary intermediate that dictates the monooxygenation mechanism in melanin biosynthesis. Proc Natl Acad Sci U S A 2022; 119:e2205619119. [PMID: 35939688 PMCID: PMC9389030 DOI: 10.1073/pnas.2205619119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 07/05/2022] [Indexed: 11/18/2022] Open
Abstract
Melanins are highly conjugated biopolymer pigments that provide photoprotection in a wide array of organisms, from bacteria to humans. The rate-limiting step in melanin biosynthesis, which is the ortho-hydroxylation of the amino acid L-tyrosine to L-DOPA, is catalyzed by the ubiquitous enzyme tyrosinase (Ty). Ty contains a coupled binuclear copper active site that binds O2 to form a μ:η2:η2-peroxide dicopper(II) intermediate (oxy-Ty), capable of performing the regioselective monooxygenation of para-substituted monophenols to catechols. The mechanism of this critical monooxygenation reaction remains poorly understood despite extensive efforts. In this study, we have employed a combination of spectroscopic, kinetic, and computational methods to trap and characterize the elusive catalytic ternary intermediate (Ty/O2/monophenol) under single-turnover conditions and obtain molecular-level mechanistic insights into its monooxygenation reactivity. Our experimental results, coupled with quantum-mechanics/molecular-mechanics calculations, reveal that the monophenol substrate docks in the active-site pocket of oxy-Ty fully protonated, without coordination to a copper or cleavage of the μ:η2:η2-peroxide O-O bond. Formation of this ternary intermediate involves the displacement of active-site water molecules by the substrate and replacement of their H bonds to the μ:η2:η2-peroxide by a single H bond from the substrate hydroxyl group. This H-bonding interaction in the ternary intermediate enables the unprecedented monooxygenation mechanism, where the μ-η2:η2-peroxide O-O bond is cleaved to accept the phenolic proton, followed by substrate phenolate coordination to a copper site concomitant with its aromatic ortho-hydroxylation by the nonprotonated μ-oxo. This study provides insights into O2 activation and reactivity by coupled binuclear copper active sites with fundamental implications in biocatalysis.
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Affiliation(s)
- Ioannis Kipouros
- Department of Chemistry, Stanford University, Stanford, CA 94305
| | - Agnieszka Stańczak
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, 166 10, Prague 6, Czech Republic
- Faculty of Science, Charles University, 128 00 Prague 2, Czech Republic
| | - Jake W. Ginsbach
- Department of Chemistry, Stanford University, Stanford, CA 94305
| | - Prokopis C. Andrikopoulos
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, 166 10, Prague 6, Czech Republic
| | - Lubomír Rulíšek
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, 166 10, Prague 6, Czech Republic
| | - Edward I. Solomon
- Department of Chemistry, Stanford University, Stanford, CA 94305
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA 94025
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27
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Zhong Z, Zhou Z, Chen J, Zhang J. Identification of 12 OCA Cases in Chinese Population and Two Novel Variants. Front Genet 2022; 13:926511. [PMID: 35923705 PMCID: PMC9340472 DOI: 10.3389/fgene.2022.926511] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 06/09/2022] [Indexed: 11/21/2022] Open
Abstract
OCA (oculocutaneous albinism) refers to a group of heterogeneous congenital disorders of which the common manifestations are variable degrees of cutaneous hypopigmentation and significant visual impairment, including poor visual acuity, photophobia, and nystagmus. Molecular analysis may elucidate its pathogenesis and be in favor of accurate diagnosis. High-throughput sequencing and Sanger sequencing were performed to detect mutational alleles and in silico analysis was performed for prediction of variant pathogenicity. Ten TYR-related and two OCA2-related patients were identified with 16 different variants with potential pathogenicity. Two novel missense variants [TYR: c.623T > G, p(Leu208Arg) and OCA2: c.1325A > G, p(Asn442Ser)] are identified in this study, and three OCA cases are reported for the first time in Chinese population based on their associated variants. Analysis of crystal structures of TYR ortholog and its paralog TYRP1 suggests that the substitution of Leu208 may have an impact on protein stability. This study may facilitate OCA diagnosis by expanding the mutational spectrum of TYR and OCA2 as well as further basic studies about these two genes.
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Affiliation(s)
- Zilin Zhong
- Birth Defect Group, Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Fourth People’s Hospital, School of Medicine, Tongji University, Shanghai, China
- Department of Regenerative Medicine, School of Medicine, Tongji University, Shanghai, China
| | - Zheng Zhou
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Jianjun Chen
- Birth Defect Group, Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Fourth People’s Hospital, School of Medicine, Tongji University, Shanghai, China
- Department of Medical Genetics, School of Medicine, Tongji University, Shanghai, China
- *Correspondence: Jianjun Chen, Jun Zhang,
| | - Jun Zhang
- Research Center for Translational Medicine, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Stem Cell Translational Research Center of Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
- *Correspondence: Jianjun Chen, Jun Zhang,
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28
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Van Stappen C, Deng Y, Liu Y, Heidari H, Wang JX, Zhou Y, Ledray AP, Lu Y. Designing Artificial Metalloenzymes by Tuning of the Environment beyond the Primary Coordination Sphere. Chem Rev 2022; 122:11974-12045. [PMID: 35816578 DOI: 10.1021/acs.chemrev.2c00106] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Metalloenzymes catalyze a variety of reactions using a limited number of natural amino acids and metallocofactors. Therefore, the environment beyond the primary coordination sphere must play an important role in both conferring and tuning their phenomenal catalytic properties, enabling active sites with otherwise similar primary coordination environments to perform a diverse array of biological functions. However, since the interactions beyond the primary coordination sphere are numerous and weak, it has been difficult to pinpoint structural features responsible for the tuning of activities of native enzymes. Designing artificial metalloenzymes (ArMs) offers an excellent basis to elucidate the roles of these interactions and to further develop practical biological catalysts. In this review, we highlight how the secondary coordination spheres of ArMs influence metal binding and catalysis, with particular focus on the use of native protein scaffolds as templates for the design of ArMs by either rational design aided by computational modeling, directed evolution, or a combination of both approaches. In describing successes in designing heme, nonheme Fe, and Cu metalloenzymes, heteronuclear metalloenzymes containing heme, and those ArMs containing other metal centers (including those with non-native metal ions and metallocofactors), we have summarized insights gained on how careful controls of the interactions in the secondary coordination sphere, including hydrophobic and hydrogen bonding interactions, allow the generation and tuning of these respective systems to approach, rival, and, in a few cases, exceed those of native enzymes. We have also provided an outlook on the remaining challenges in the field and future directions that will allow for a deeper understanding of the secondary coordination sphere a deeper understanding of the secondary coordintion sphere to be gained, and in turn to guide the design of a broader and more efficient variety of ArMs.
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Affiliation(s)
- Casey Van Stappen
- Department of Chemistry, University of Texas at Austin, 105 East 24th Street, Austin, Texas 78712, United States
| | - Yunling Deng
- Department of Chemistry, University of Texas at Austin, 105 East 24th Street, Austin, Texas 78712, United States
| | - Yiwei Liu
- Department of Chemistry, University of Illinois, Urbana-Champaign, 505 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Hirbod Heidari
- Department of Chemistry, University of Texas at Austin, 105 East 24th Street, Austin, Texas 78712, United States
| | - Jing-Xiang Wang
- Department of Chemistry, University of Texas at Austin, 105 East 24th Street, Austin, Texas 78712, United States
| | - Yu Zhou
- Department of Chemistry, University of Texas at Austin, 105 East 24th Street, Austin, Texas 78712, United States
| | - Aaron P Ledray
- Department of Chemistry, University of Texas at Austin, 105 East 24th Street, Austin, Texas 78712, United States
| | - Yi Lu
- Department of Chemistry, University of Texas at Austin, 105 East 24th Street, Austin, Texas 78712, United States.,Department of Chemistry, University of Illinois, Urbana-Champaign, 505 South Mathews Avenue, Urbana, Illinois 61801, United States
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29
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Zheng Y, Shen Q, Li Z, Jing X, Duan C. Two Copper-Containing Polyoxometalate-Based Metal-Organic Complexes as Heterogeneous Catalysts for the C-H Bond Oxidation of Benzylic Compounds and Olefin Epoxidation. Inorg Chem 2022; 61:11156-11164. [PMID: 35799381 DOI: 10.1021/acs.inorgchem.2c01073] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Using a one-pot assembly method, two novel copper-containing Keggin-type polyoxometalates (POMs)-based metal-organic complexes, that is, [CuII2(pbba)2NO3-(H2O)2(PW12O40)]·3H2O [PW12-Cu-pbba, H2pbba = 1,1'-(1,4-phenylene-bis(methylene))-bis(pyridine-3-carboxylic acid)] and [CuII2(pbba)2(H2O)2(GeW12O40)]·3H2O (GeW12-Cu-pbba), were successfully synthesized. These two complexes are isostructural, differing only in their POM components. They are applicable as heterogeneous catalysts for the C-H bond oxidation of benzylic compounds and olefin epoxidation under mild conditions, with oxygen as the oxidant and isobutyraldehyde as the coreductant. The catalytic activity of PW12-Cu-pbba was superior to that of GeW12-Cu-pbba. Under the optimal conditions, PW12-Cu-pbba catalyzed the oxidation of indane into 1-indanone with an 81% yield and >99% selectivity within 48 h. As heterogeneous catalysts, both complexes demonstrated excellent recoverability and high stability and could be stably reused five times without significant activity loss.
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Affiliation(s)
- Yiying Zheng
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P. R. China
| | - Qingbo Shen
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P. R. China
| | - Zhentao Li
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P. R. China
| | - Xu Jing
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P. R. China
| | - Chunying Duan
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P. R. China
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30
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Schneider R, Engesser TA, Näther C, Krossing I, Tuczek F. Copper-Catalyzed Monooxygenation of Phenols: Evidence for a Mononuclear Reaction Mechanism. Angew Chem Int Ed Engl 2022; 61:e202202562. [PMID: 35344617 PMCID: PMC9323449 DOI: 10.1002/anie.202202562] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Indexed: 11/17/2022]
Abstract
The CuI salts [Cu(CH3 CN)4 ]PF and [Cu(oDFB)2 ]PF with the very weakly coordinating anion Al(OC(CF3 )3 )4- (PF) as well as [Cu(NEt3 )2 ]PF comprising the unique, linear bis-triethylamine complex [Cu(NEt3 )2 ]+ were synthesized and examined as catalysts for the conversion of monophenols to o-quinones. The activities of these CuI salts towards monooxygenation of 2,4-di-tert-butylphenol (DTBP-H) were compared to those of [Cu(CH3 CN)4 ]X salts with "classic" anions (BF4- , OTf- , PF6- ), revealing an anion effect on the activity of the catalyst and a ligand effect on the reaction rate. The reaction is drastically accelerated by employing CuII -semiquinone complexes as catalysts, indicating that formation of a CuII complex precedes the actual catalytic cycle. This result and other experimental observations show that with these systems the oxygenation of monophenols does not follow a dinuclear, but a mononuclear pathway analogous to that of topaquinone cofactor biosynthesis in amine oxidase.
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Affiliation(s)
- Rebecca Schneider
- Institut für Anorganische ChemieChristian-Albrechts-Universität zu KielMax-Eyth-Straße 224118KielGermany
| | - Tobias A. Engesser
- Institut für Anorganische ChemieChristian-Albrechts-Universität zu KielMax-Eyth-Straße 224118KielGermany
| | - Christian Näther
- Institut für Anorganische ChemieChristian-Albrechts-Universität zu KielMax-Eyth-Straße 224118KielGermany
| | - Ingo Krossing
- Institut für Anorganische und Analytische ChemieAlbert-Ludwigs-Universität FreiburgAlbertstraße 2179104FreiburgGermany
| | - Felix Tuczek
- Institut für Anorganische ChemieChristian-Albrechts-Universität zu KielMax-Eyth-Straße 224118KielGermany
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31
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Ji G, Zhao L, Wang Y, Tang Y, He C, Liu S, Duan C. A Binuclear Cerium-Based Metal–Organic Framework as an Artificial Monooxygenase for the Saturated Hydrocarbon Aerobic Oxidation with High Efficiency and High Selectivity. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Guanfeng Ji
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, People’s Republic of China
| | - Liang Zhao
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, People’s Republic of China
| | - Yefei Wang
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, People’s Republic of China
| | - Yang Tang
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, People’s Republic of China
| | - Cheng He
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, People’s Republic of China
| | - Songtao Liu
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, People’s Republic of China
| | - Chunying Duan
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, People’s Republic of China
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32
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Ghani U. Azole inhibitors of mushroom and human tyrosinases: Current advances and prospects of drug development for melanogenic dermatological disorders. Eur J Med Chem 2022; 239:114525. [PMID: 35717871 DOI: 10.1016/j.ejmech.2022.114525] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 06/05/2022] [Accepted: 06/06/2022] [Indexed: 11/16/2022]
Abstract
Azoles are a famous and promising class of drugs for treatment of a range of ailments especially fungal infections. A wide variety of azole derivatives are also known to exhibit tyrosinase inhibition, some of which possess promising activity with potential for treatment of dermatological disorders such as post-inflammatory hyperpigmentation, nevus, flecks, melasma, and melanoma. Recently, thiazolyl-resorcinol derivatives have demonstrated potent human tyrosinase inhibition with a safe and effective therapeutic profile for treatment of skin hyperpigmentation in humans, which are currently under clinical trials. If approved these derivatives would be the first azole drugs to be used for treatment of skin hyperpigmentation. Although the scientific literature has been witnessing general reviews on tyrosinase inhibitors to date, there is none that specifically and comprehensively discusses azole inhibitors of tyrosinase. Appreciating such potential of azoles, this focused review highlights a wide range of their derivatives with promising mushroom and human tyrosinase inhibitory activities and clinical potential for treatment of melanogenic dermatological disorders. Presently, these disorders have been treated with kojic acid, hydroquinone and other drugs, the design and development of which are based on their ability to inhibit mushroom tyrosinase. The active sites of mushroom and human tyrosinases carry structural differences which affect substrate or inhibitor binding. For this reason, kojic acid and other drugs pose efficacy and safety issues since they were originally developed using mushroom tyrosinase and have been clinically used on human tyrosinase. Design and development of tyrosinase inhibitors should be based on human tyrosinase, however, there are challenges in obtaining the human enzyme and understanding its structure and function. The review discusses these challenges that encompass structural and functional differences between mushroom and human tyrosinases and the manner in which they are inhibited. The review also gauges promising azole derivatives with potential for development of drugs against skin hyperpigmentation by analyzing and comparing their tyrosinase inhibitory activities against mushroom and human tyrosinases, computational data, and clinical profile where available. It aims to lay groundwork for development of new azole drugs for treatment of skin hyperpigmentation, melanoma, and related dermatological disorders.
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Affiliation(s)
- Usman Ghani
- Clinical Biochemistry Unit, Department of Pathology, College of Medicine, King Saud University, Riyadh, 12372, Saudi Arabia.
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33
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Wang Z, Li JY, Huang T, Li HM, Zhang T. A Cu-based metal-organic framework with two types of connecting nodes as catalyst for oxygen activation. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.06.058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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34
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Stańczak A, Chalupský J, Rulíšek L, Straka M. Comprehensive Theoretical View of the [Cu2O2] Side-on-Peroxo-/Bis-μ-Oxo Equilibria. Chemphyschem 2022; 23:e202200076. [PMID: 35532185 DOI: 10.1002/cphc.202200076] [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: 01/31/2022] [Revised: 04/20/2022] [Indexed: 11/07/2022]
Abstract
Coupled binuclear copper (CBC) sites are employed by many metalloenzymes to catalyze a broad set of biochemical transformations. Typically, the CBC catalytic sites are activated by the O2 molecule to form various [Cu2O2] reactive species. This has also inspired synthesis and development of various biomimetic inorganic complexes featuring the CBC core. From theoretical perspective, the [Cu2O2] reactivity often hinges on the side-on-peroxo-dicopper(II) (P) vs. bis-μ-oxo-dicopper(III) (O) isomerism - an equilibrium that has become almost iconic in theoretical bioinorganic chemistry. Herein, we present a comprehensive calibration and evaluation of the performance of various composite computational protocols available in contemporary computational chemistry, involving coupled-cluster and multi-reference (relativistic) wave function methods, popular density functionals and solvation models. Starting with the well-studied reference [Cu2O2(NH3)6]2+ system, we compared the performance of electronic structure methods and discussed the relativistic effects. This allowed us to select several 'calibrated' DFT functionals that can be conveniently employed to study ten experimentally well-characterized [Cu2O2] inorganic systems. We mostly correctly predicted the lowest-energy structures (P vs. O) of the studied systems. In addition, we present calibration of the used electronic structure methods for prediction of the spectroscopic features of the [Cu2O2] core.
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Affiliation(s)
- Agnieszka Stańczak
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences: Ustav organicke chemie a biochemie Akademie ved Ceske republiky, Bioinorganic Chemistry, CZECH REPUBLIC
| | - Jakub Chalupský
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences: Ustav organicke chemie a biochemie Akademie ved Ceske republiky, Bioinorganic Chemistry, CZECH REPUBLIC
| | - Lubomír Rulíšek
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences: Ustav organicke chemie a biochemie Akademie ved Ceske republiky, Bioinorganic Chemistry, CZECH REPUBLIC
| | - Michal Straka
- Institute of Organic Chemistry and Biochemistry Czech Academy of Sciences: Ustav organicke chemie a biochemie Akademie ved Ceske republiky, Bioinorganic Chemistry, Flemingovo nam. 2, 16610, Prague, CZECH REPUBLIC
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35
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Nardella MI, Fortino M, Barbanente A, Natile G, Pietropaolo A, Arnesano F. Multinuclear Metal-Binding Ability of the N-Terminal Region of Human Copper Transporter Ctr1: Dependence Upon pH and Metal Oxidation State. Front Mol Biosci 2022; 9:897621. [PMID: 35601835 PMCID: PMC9117721 DOI: 10.3389/fmolb.2022.897621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 04/20/2022] [Indexed: 11/23/2022] Open
Abstract
The 14mer peptide corresponding to the N-terminal region of human copper transporter Ctr1 was used to investigate the intricate mechanism of metal binding to this plasma membrane permease responsible for copper import in eukaryotic cells. The peptide contains a high-affinity ATCUN Cu(II)/Ni(II)-selective motif, a methionine-only MxMxxM Cu(I)/Ag(I)-selective motif and a double histidine HH(M) motif, which can bind both Cu(II) and Cu(I)/Ag(I) ions. Using a combination of NMR spectroscopy and electrospray mass spectrometry, clear evidence was gained that the Ctr1 peptide, at neutral pH, can bind one or two metal ions in the same or different oxidation states. Addition of ascorbate to a neutral solution containing Ctr11-14 and Cu(II) in 1:1 ratio does not cause an appreciable reduction of Cu(II) to Cu(I), which is indicative of a tight binding of Cu(II) to the ATCUN motif. However, by lowering the pH to 3.5, the Cu(II) ion detaches from the peptide and becomes susceptible to reduction to Cu(I) by ascorbate. It is noteworthy that at low pH, unlike Cu(II), Cu(I) stably binds to methionines of the peptide. This redox reaction could take place in the lumen of acidic organelles after Ctr1 internalization. Unlike Ctr11-14-Cu(II), bimetallic Ctr11-14-2Cu(II) is susceptible to partial reduction by ascorbate at neutral pH, which is indicative of a lower binding affinity of the second Cu(II) ion. The reduced copper remains bound to the peptide, most likely to the HH(M) motif. By lowering the pH to 3.5, Cu(I) shifts from HH(M) to methionine-only coordination, an indication that only the pH-insensitive methionine motif is competent for metal binding at low pH. The easy interconversion of monovalent cations between different coordination modes was supported by DFT calculations.
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Affiliation(s)
| | - Mariagrazia Fortino
- Dipartimento di Scienze Della Salute, University of Catanzaro, Catanzaro, Italy
| | | | - Giovanni Natile
- Department of Chemistry, University of Bari Aldo Moro, Bari, Italy
| | - Adriana Pietropaolo
- Dipartimento di Scienze Della Salute, University of Catanzaro, Catanzaro, Italy
| | - Fabio Arnesano
- Department of Chemistry, University of Bari Aldo Moro, Bari, Italy
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36
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Xu H, Sun J, Zhao Z, Ma X, Li C, Liu L, Zhang G. Lactobacillus plantarum
ZLC‐18 fermentation improve tyrosinase inhibition activity and antioxidant capacity in soybean hulls. Int J Food Sci Technol 2022. [DOI: 10.1111/ijfs.15788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hanxue Xu
- Key Laboratory of Dairy Sciences Ministry of Education College of Food Sciences Northeast Agricultural University Harbin China
| | - Jinwei Sun
- Key Laboratory of Dairy Sciences Ministry of Education College of Food Sciences Northeast Agricultural University Harbin China
- Product Research and Development Center Newhopedairy Co., Ltd Chengdu China
| | - Zifu Zhao
- Key Laboratory of Dairy Sciences Ministry of Education College of Food Sciences Northeast Agricultural University Harbin China
- Inner Mongolia Yili Group Co Ltd, Hohhot China
| | - Xinkai Ma
- Key Laboratory of Dairy Sciences Ministry of Education College of Food Sciences Northeast Agricultural University Harbin China
| | - Chun Li
- Key Laboratory of Dairy Sciences Ministry of Education College of Food Sciences Northeast Agricultural University Harbin China
- Heilongjiang Green Food Research Institute Harbin China
| | - Libo Liu
- Key Laboratory of Dairy Sciences Ministry of Education College of Food Sciences Northeast Agricultural University Harbin China
| | - Guofang Zhang
- Key Laboratory of Dairy Sciences Ministry of Education College of Food Sciences Northeast Agricultural University Harbin China
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37
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Kumari A, kumar R, Sulabh G, Singh P, Kumar J, Singh VK, Ojha KK. In silico ADMET, molecular docking and molecular simulation-based study of glabridin’s natural and semisynthetic derivatives as potential tyrosinase inhibitors. ADVANCES IN TRADITIONAL MEDICINE 2022. [PMCID: PMC9000003 DOI: 10.1007/s13596-022-00640-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Hyper-pigmentation conditions may develop due to erroneous melanogenesis cascade which leads to excess melanin production. Recently, inhibition of tyrosinase is the main focus of investigation as it majorly contributes to melanin production. This inhibition property can be exploited in medicine, agriculture, and in cosmetics. Present study aims to find a natural and safe alternative molecule as tyrosinase inhibitor. In this study, human tyrosinase enzyme was modelled due to unavailability of its crystal structure to look into the degree of efficacy of glabridin and its 15 derivatives as tyrosinase inhibitor. Docking was performed by Autodock Vina at the catalytic core enzyme. Glabridin effects on melanoma cell lines was also elucidated by analysing cytotoxicity and effect on melanin production. Computational ADME analysis was done by SwissADME. Molecular dynamic simulation was also performed to further evaluate the interaction profile of these molecules and kojic acid (positive inhibitor) with respect to apo protein. Notably, four derivatives 5′-formylglabridin, glabridin dimer, 5′-prenyl glabridin and R-glabridin exhibited better binding affinity than glabridin. Glabridin effectively inhibited melanin production in a dose dependent manner. Among these, 5′-formylglabridin displayed highest binding affinity with docking score − 9.2 kcal/mol. Molecular properties and bioactivity analysis by Molinspiration web server and by SwissADME also presented these molecules as potential drug candidates. The study explores the understanding for the development of suitable tyrosinase inhibitor/s for the prevention of hyperpigmentation. However, a detailed in vivo study is required for glabridin derivatives to suggest these molecules as anti-melanogenic compound.
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38
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Schneider R, Engesser TA, Näther C, Krossing I, Tuczek F. Copper‐Catalyzed Monooxygenation of Phenols: Evidence for a Mononuclear Reaction Mechanism. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202202562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Rebecca Schneider
- Christian-Albrechts-Universität zu Kiel: Christian-Albrechts-Universitat zu Kiel Institute for Inorganic Chemistry Max-Eyth-Straße 2 24118 Kiel GERMANY
| | - Tobias A. Engesser
- Christian-Albrechts-Universitat zu Kiel Institut für Anorganische Chemie Otto-Hahn-Platz 10 24118 Kiel GERMANY
| | - Christian Näther
- Christian-Albrechts-Universität zu Kiel: Christian-Albrechts-Universitat zu Kiel Institute for Inorganic Chemistry Max-Eyth-Straße 2 24118 Kiel GERMANY
| | - Ingo Krossing
- University of Freiburg: Albert-Ludwigs-Universitat Freiburg Institute for Inorganic and Analytical Chemistry Albertstr. 21 79104 Freiburg i. Br. GERMANY
| | - Felix Tuczek
- Christian-Albrechts-Universität zu Kiel: Christian-Albrechts-Universitat zu Kiel Institute for Inorganic Chemistry Max-Eyth-Straße 2 24118 Kiel GERMANY
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39
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Kipouros I, Stańczak A, Culka M, Andris E, Machonkin TR, Rulíšek L, Solomon EI. Evidence for H-bonding interactions to the μ-η 2:η 2-peroxide of oxy-tyrosinase that activate its coupled binuclear copper site. Chem Commun (Camb) 2022; 58:3913-3916. [PMID: 35237779 PMCID: PMC8966618 DOI: 10.1039/d2cc00750a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The factors that control the diverse reactivity of the μ-η2:η2-peroxo dicopper(II) oxy-intermediates in the coupled binuclear copper proteins remain elusive. Here, spectroscopic and computational methods reveal H-bonding interactions between active-site waters and the μ-η2:η2-peroxide of oxy-tyrosinase, and define their effects on the Cu(II)2O2 electronic structure and O2 activation.
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Affiliation(s)
- Ioannis Kipouros
- Department of Chemistry, Stanford University, Stanford, California 94305, USA.
| | - Agnieszka Stańczak
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 2, 166 10, Praha 6, Czech Republic.
- Faculty of Science, Charles University, Albertov 2038/6, 128 00 Praha 2, Czech Republic
| | - Martin Culka
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 2, 166 10, Praha 6, Czech Republic.
| | - Erik Andris
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 2, 166 10, Praha 6, Czech Republic.
| | | | - Lubomír Rulíšek
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 2, 166 10, Praha 6, Czech Republic.
| | - Edward I Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, USA.
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, USA
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40
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Kojic Acid Showed Consistent Inhibitory Activity on Tyrosinase from Mushroom and in Cultured B16F10 Cells Compared with Arbutins. Antioxidants (Basel) 2022; 11:antiox11030502. [PMID: 35326152 PMCID: PMC8944748 DOI: 10.3390/antiox11030502] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 03/03/2022] [Accepted: 03/03/2022] [Indexed: 12/24/2022] Open
Abstract
Kojic acid, β-arbutin, α-arbutin, and deoxyarbutin have been reported as tyrosinase inhibitors in many articles, but some contradictions exist in their differing results. In order to provide some explanations for these contradictions and to find the most suitable compound as a positive control for screening potential tyrosinase inhibitors, the activity and inhibition type of the aforementioned compounds on monophenolase and diphenolase of mushroom tyrosinase (MTYR) were studied. Their effects on B16F10 cells melanin content, tyrosinase (BTYR) activity, and cell viability were also exposed. Results indicated that α-arbutin competitively inhibited monophenolase activity, whereas they uncompetitively activated diphenolase activity of MTYR. β-arbutin noncompetitively and competitively inhibited monophenolase activity at high molarity (4000 µM) and moderate molarity (250–1000 µM) respectively, whereas it activated the diphenolase activity of MTYR. Deoxyarbutin competitively inhibited diphenolase activity, but could not inhibit monophenolase activity and only extended the lag time. Kojic acid competitively inhibited monophenolase activity and competitive–noncompetitive mixed-type inhibited diphenolase activity of MTYR. In a cellular experiment, deoxyarbutin effectively inhibited BTYR activity and reduced melanin content, but it also potently decreased cell viability. α-arbutin and β-arbutin dose-dependently inhibited BTYR activity, reduced melanin content, and increased cell viability. Kojic acid did not affect cell viability at 43.8–700 µM, but inhibited BTYR activity and reduced melanin content in a dose-dependent manner. Therefore, kojic acid was considered as the most suitable positive control among these four compounds, because it could inhibit both monophenolase and diphenolase activity of MTYR and reduce intercellular melanin content by inhibiting BTYR activity without cytotoxicity. Some explanations for the contradictions in the reported articles were provided.
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41
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Kang P, Lin BL, Large TAG, Ainsworth J, Wasinger EC, Stack TDP. Phenolate-bonded bis(μ-oxido)-bis-copper(III) intermediates: hydroxylation and dehalogenation reactivities. Faraday Discuss 2022; 234:86-108. [PMID: 35156114 DOI: 10.1039/d1fd00071c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Exogenous phenolate ortho-hydroxylation by copper oxidants formed from dioxygen is generally thought to occur through one of two limiting mechanisms defined by the structure of the active oxidant: an electrophilic μ-η2:η2-peroxo-bis-copper(II) species as found in the oxygenated form of the binuclear copper enzyme tyrosinase (oxyTyr), or an isomeric bis(μ-oxido)-bis-copper(III) species (O) with ligated phenolate(s) as evidenced by most synthetic systems. The characterization of the latter is limited due to their limited thermal stability. This study expands the scope of an O species with ligated phenolate(s) using N,N'-di-tert-butyl-1,3-propanediamine (DBPD), a flexible secondary diamine ligand. Oxygenation of the [(DBPD)Cu(I)]1+ complex at low temperatures (e.g., 153 K) forms a spectroscopically and structurally faithful model to oxyTyr, a side-on peroxide intermediate, which reacts with added phenolates to form a bis(μ-oxido)-bis-copper(III) species with ligated phenolates, designated as an A species. The proposed stoichiometry of A is best understood as possessing 2 rather than 1 bonded phenolate. Thermal decomposition of A results in regiospecific phenolate ortho-hydroxylation with the ortho-substituent as either a C-H or C-X (Cl, Br) group, though the halogen displacement is significantly slower. DFT and experimental studies support an electrophilic attack of an oxide ligand into the π-system of a ligated phenolate. This study supports a hydroxylation mechanism in which O-O bond cleavage of the initially formed peroxide by phenolate ligation, which precedes phenolate aromatic hydroxylation.
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Affiliation(s)
- Peng Kang
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Bo-Lin Lin
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Tao A G Large
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Jasper Ainsworth
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Erik C Wasinger
- Department of Chemistry and Biochemistry, California State University, Chico, California 95929, USA.
| | - T Daniel P Stack
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
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42
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Rhoda HM, Heyer AJ, Snyder BER, Plessers D, Bols ML, Schoonheydt RA, Sels BF, Solomon EI. Second-Sphere Lattice Effects in Copper and Iron Zeolite Catalysis. Chem Rev 2022; 122:12207-12243. [PMID: 35077641 DOI: 10.1021/acs.chemrev.1c00915] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Transition-metal-exchanged zeolites perform remarkable chemical reactions from low-temperature methane to methanol oxidation to selective reduction of NOx pollutants. As with metalloenzymes, metallozeolites have impressive reactivities that are controlled in part by interactions outside the immediate coordination sphere. These second-sphere effects include activating a metal site through enforcing an "entatic" state, controlling binding and access to the metal site with pockets and channels, and directing radical rebound vs cage escape. This review explores these effects with emphasis placed on but not limited to the selective oxidation of methane to methanol with a focus on copper and iron active sites, although other transition-metal-ion zeolite reactions are also explored. While the actual active-site geometric and electronic structures are different in the copper and iron metallozeolites compared to the metalloenzymes, their second-sphere interactions with the lattice or the protein environments are found to have strong parallels that contribute to their high activity and selectivity.
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Affiliation(s)
- Hannah M Rhoda
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Alexander J Heyer
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Benjamin E R Snyder
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Dieter Plessers
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Max L Bols
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Robert A Schoonheydt
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Bert F Sels
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Edward I Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, United States.,Photon Science, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, United States
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Peng Z, Li Y, Tan L, Chen L, Shi Q, Zeng QH, Liu H, Wang JJ, Zhao Y. Anti-tyrosinase, antioxidant and antibacterial activities of gallic acid-benzylidenehydrazine hybrids and their application in preservation of fresh-cut apples and shrimps. Food Chem 2022; 378:132127. [PMID: 35033723 DOI: 10.1016/j.foodchem.2022.132127] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 01/02/2022] [Accepted: 01/08/2022] [Indexed: 11/04/2022]
Abstract
A series of gallic acid-benzylidenehydrazine hybrids were synthesized and evaluated for their tyrosinase inhibitory activity. Thereinto, compounds 5d and 5f potently inhibited tyrosinase with IC50 of 15.3 and 3.3 μM, compared to kojic acid (44.4 μM). The inhibition mechanism suggested that 5d and 5f not only chelated with Cu2+, but also reduced Cu2+ to Cu1+ in the tyrosinase active site. Additionally, 5d and 5f exhibited strong DPPH scavenging and antibacterial activities against Vibrio parahaemolyticu and Staphylococcus aureus, which can be attributed to the function of gallic acid and hydrazone moiety. These compounds also exhibited capacity to preserve fresh-cut apples and shrimps. Finally, 5d and 5f exhibited low cytotoxic activity in a human cell line (HEK293). Therefore, these compounds possess anti-tyrosinase, antioxidant, and antibacterial activities, and can be used in the development of novel food preservatives.
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Affiliation(s)
- Zhiyun Peng
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Yufeng Li
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Lijun Tan
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Lu Chen
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Qiandai Shi
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Qiao-Hui Zeng
- Department of Food Science, Foshan University, Foshan 528000, China
| | - Haiquan Liu
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; Laboratory of Quality & Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), Ministry of Agriculture, Shanghai 201306, China; Shanghai Engineering Research Center of Aquatic-Product Processing & Preservation, Shanghai 201306, China
| | - Jing Jing Wang
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; Department of Food Science, Foshan University, Foshan 528000, China.
| | - Yong Zhao
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; Laboratory of Quality & Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), Ministry of Agriculture, Shanghai 201306, China; Shanghai Engineering Research Center of Aquatic-Product Processing & Preservation, Shanghai 201306, China.
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Chen CY, Tsai ML. Tris(Imidazolyl) Dicopper(I) Complex and its Reactivity to Exert Catalytic Oxidation of Sterically Hindered Phenol Substrates via a [Cu2O]2+ Core. Dalton Trans 2022; 51:2428-2443. [DOI: 10.1039/d1dt04084g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Cu ion ligated with histidine residues is a common active site motif of various Cu-containing metalloenzymes exerting versatile catalytic oxidation reactions. Due to the scarce of structurally characterized biomimetic...
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Agunbiade M, Le Roes-Hill M. Application of bacterial tyrosinases in organic synthesis. World J Microbiol Biotechnol 2021; 38:2. [PMID: 34817696 DOI: 10.1007/s11274-021-03186-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 11/06/2021] [Indexed: 11/26/2022]
Abstract
Bacterial tyrosinases, as in the case of other bacterial oxidative enzymes, have been found to possess biochemical characteristics that typically make them more suited to applications requiring special operational conditions such as alkaline pH, high or low temperature, the presence of organic solvents, and the presence of inhibitors. Even though a great deal is known about fungal tyrosinases, bacterial tyrosinases still vastly remain underexplored for their potential application in organic synthesis. A literature survey in particular highlights the gaps in our knowledge pertaining to their biochemical properties. Bacterial tyrosinases have not only shown promise in the synthesis of medically important compounds such as L-3,4-dihydroxyphenylalanine (L-DOPA) and melanin but have also seen application in cross-linking reactions of proteins and the polymerization of environmental pollutants. Their ability to catalyse o-hydroxylation reactions have shown some degree of promise in the biocatalytic conversion of resveratrol to piceatannol, tyrosol to hydroxytyrosol, and many more. In this review, we will explore the world of bacterial tyrosinases, their current applications, and future perspectives for the application of these enzymes in organic synthesis.
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Affiliation(s)
- Mayowa Agunbiade
- Applied Microbial and Health Biotechnology Institute, Cape Peninsula University of Technology, PO Box 1906, 7535, Bellville, South Africa
| | - Marilize Le Roes-Hill
- Applied Microbial and Health Biotechnology Institute, Cape Peninsula University of Technology, PO Box 1906, 7535, Bellville, South Africa.
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Spedalotto G, Lovisari M, McDonald AR. Reactivity Properties of Mixed- and High-Valent Bis(μ-Hydroxide)-Dinickel Complexes. ACS OMEGA 2021; 6:28162-28170. [PMID: 34723014 PMCID: PMC8554787 DOI: 10.1021/acsomega.1c04225] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 09/22/2021] [Indexed: 06/13/2023]
Abstract
Despite their potential role in enzymatic systems, there is a dearth of hydroxide-bridged high-valent oxidants. We recently reported the synthesis and characterization of NiIINiIII(μ-OH)2 (2) and Ni2 III(μ-OH)2 (3) species supported by a dicarboxamidate ligand (N,N'-bis(2,6-dimethyl-phenyl)-2,2-dimethylmalonamide). Herein, we explore the oxidative reactivity of these species using a series of para-substituted 2,6-di-tert-butyl-phenols (4-X-2,6-DTBP, X = -OCH3, -CH2CH3, -CH3, -C(CH3)3, -H, -Br, -CN, and -NO2) as a mechanistic probe. Interestingly, upon reaction of 3 with the substrates, the formation of a new transient species, 2', was observed. 2' is postulated to be a protic congener of 2. All three species were demonstrated to react with the substituted phenols through a hydrogen atom transfer reaction mechanism, which was elucidated further by analysis of the postreaction mixtures. Critically, 3 was demonstrated to react at far superior rates to 2 and 2', and oxidized substrates more efficiently than any bis-μ-oxo-Ni2 III reported to date. The kinetic superiority of 3 with respect to 2 and 2' was attributed to a stronger bond in the product of oxidation by 3 when compared to those calculated for 2 and 2'.
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47
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Li Y, Deng B, Yang S, Tian H, Sun B. A colorimetric fluorescent probe for the detection of tyrosinase and its application for the food industry. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113458] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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48
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Roterman I, Stapor K, Fabian P, Konieczny L. In Silico Modeling of the Influence of Environment on Amyloid Folding Using FOD-M Model. Int J Mol Sci 2021; 22:10587. [PMID: 34638925 PMCID: PMC8508659 DOI: 10.3390/ijms221910587] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 09/24/2021] [Accepted: 09/25/2021] [Indexed: 11/17/2022] Open
Abstract
The role of the environment in amyloid formation based on the fuzzy oil drop model (FOD) is discussed here. This model assumes that the hydrophobicity distribution within a globular protein is consistent with a 3D Gaussian (3DG) distribution. Such a distribution is interpreted as the idealized effect of the presence of a polar solvent-water. A chain with a sequence of amino acids (which are bipolar molecules) determined by evolution recreates a micelle-like structure with varying accuracy. The membrane, which is a specific environment with opposite characteristics to the polar aquatic environment, directs the hydrophobic residues towards the surface. The modification of the FOD model to the FOD-M form takes into account the specificity of the cell membrane. It consists in "inverting" the 3DG distribution (complementing the Gaussian distribution), which expresses the exposure of hydrophobic residues on the surface. It turns out that the influence of the environment for any protein (soluble or membrane-anchored) is the result of a consensus factor expressing the participation of the polar environment and the "inverted" environment. The ratio between the proportion of the aqueous and the "reversed" environment turns out to be a characteristic property of a given protein, including amyloid protein in particular. The structure of amyloid proteins has been characterized in the context of prion, intrinsically disordered, and other non-complexing proteins to cover a wider spectrum of molecules with the given characteristics based on the FOD-M model.
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Affiliation(s)
- Irena Roterman
- Department of Bioinformatics and Telemedicine, Medical College, Jagiellonian University, Medyczna 7, 30-688 Kraków, Poland
| | - Katarzyna Stapor
- Institute of Computer Science, Silesian University of Technology, Akademicka 16, 44-100 Gliwice, Poland; (K.S.); (P.F.)
| | - Piotr Fabian
- Institute of Computer Science, Silesian University of Technology, Akademicka 16, 44-100 Gliwice, Poland; (K.S.); (P.F.)
| | - Leszek Konieczny
- Chair of Medical Biochemistry, Medical College, Jagiellonian University, Kopernika 7, 31-034 Kraków, Poland;
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49
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Li Y, Deng B, Yang S, Tian H, Liu Y, Sun B. A Fluorescent Probe for The Visible Colorimetric Detection of Tyrosinase. ChemistrySelect 2021. [DOI: 10.1002/slct.202102473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yanan Li
- Beijing Key laboratory of Flavor Chemistry Beijing Technology and Business University Beijing 100048 PR China
| | - Bing Deng
- Beijing Key laboratory of Flavor Chemistry Beijing Technology and Business University Beijing 100048 PR China
| | - Shaoxiang Yang
- Beijing Key laboratory of Flavor Chemistry Beijing Technology and Business University Beijing 100048 PR China
| | - Hongyu Tian
- Beijing Key laboratory of Flavor Chemistry Beijing Technology and Business University Beijing 100048 PR China
| | - Yongguo Liu
- Beijing Key laboratory of Flavor Chemistry Beijing Technology and Business University Beijing 100048 PR China
| | - Baoguo Sun
- Beijing Key laboratory of Flavor Chemistry Beijing Technology and Business University Beijing 100048 PR China
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50
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Vargo NP, Harland JB, Musselman BW, Lehnert N, Ertem MZ, Robinson JR. Calcium‐Ion Binding Mediates the Reversible Interconversion of
Cis
and
Trans
Peroxido Dicopper Cores. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Natasha P. Vargo
- Department of Chemistry Brown University 324 Brook Street Providence RI 02912 USA
| | - Jill B. Harland
- Department of Chemistry and Department of Biophysics University of Michigan 930 North University Avenue Ann Arbor MI 41809-1055 USA
| | - Bradley W. Musselman
- Department of Chemistry and Department of Biophysics University of Michigan 930 North University Avenue Ann Arbor MI 41809-1055 USA
| | - Nicolai Lehnert
- Department of Chemistry and Department of Biophysics University of Michigan 930 North University Avenue Ann Arbor MI 41809-1055 USA
| | - Mehmed Z. Ertem
- Chemistry Division, Energy & Photon Sciences Brookhaven National Laboratory PO Box 5000 Upton NY 11973-5000 USA
| | - Jerome R. Robinson
- Department of Chemistry Brown University 324 Brook Street Providence RI 02912 USA
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