Conversion of walnut tyrosinase into a catechol oxidase by site directed mutagenesis. [PDF]
Sci Rep, 2020 AbstractPolyphenol oxidases (PPOs) comprise tyrosinases (TYRs) and catechol oxidases (COs), which catalyse the initial reactions in the biosynthesis of melanin. TYRs hydroxylate monophenolic (monophenolase activity) and oxidize diphenolic (diphenolase activity) substrates, whereas COs react only with diphenols.
Panis F +3 more
europepmc +5 more sources
The Binding Affinity of Small Molecules with Yam Tyrosinase (Catechol Oxidase): A Biophysical Study [PDF]
Biochemistry Research International, 2019 Yam tyrosinase has become an economically essential enzyme due to its ease of purification and abundant availability of yam tubers. However, an efficient biochemical and biophysical characterization of yam tyrosinase has not been reported. In the present
Tabassum Mulla +3 more
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Case Report: A possible novel adult-onset, progressive MAO-A hypofunction [PDF]
Frontiers in NeuroscienceWe describe the clinical presentation, pathophysiology, and successful treatment of a previously undocumented adult onset, progressive form of monoamine oxidase A hypofunction.
Stefan Berteau, Erik Armitano
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A new crystal form of Aspergillus oryzae catechol oxidase and evaluation of copper site structures in coupled binuclear copper enzymes. [PDF]
PLoS ONE, 2018 Coupled binuclear copper (CBC) enzymes have a conserved type 3 copper site that binds molecular oxygen to oxidize various mono- and diphenolic compounds.
Leena Penttinen +5 more
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Structural and spectroscopic studies of a model for catechol oxidase [PDF]
Journal of Biological Inorganic Chemistry, 2008 A binuclear copper complex, [Cu2(BPMP) (OAc)2][ClO4] x H2O, has been prepared using the binucleating ligand 2,6-bis[bis(pyridin-2-ylmethylamino)methyl]-4-methylphenol (H-BPMP). The X-ray crystal structure reveals the copper centers to have a five-coordinate square pyramidal geometry, with the acetate ligands bound terminally.
Gerhard Schenk +2 more
exaly +7 more sources
Aurone synthase is a catechol oxidase with hydroxylase activity and provides insights into the mechanism of plant polyphenol oxidases [PDF]
Proceedings of the National Academy of Sciences of the United States of America, 2016 Annette Rompel +2 more
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Purification and Enzymatic Properties of Soluble and Membrane-Bound Polyphenol Oxidase from Agaricus bisporus [PDF]
Shipin Kexue, 2023 An extraction and purification method for soluble polyphenol oxidase (sPPO) and membrane-bound polyphenol oxidases (mPPO) from Agaricus bisporus was developed involving temperature-induced phase partitioning, fractional precipitation with ammonium ...
HE Xingxing, LEI Jing, GUAN Wenqiang
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Towards Efficient Catalysts via Biomimetic Chemistry for Diphenols and Aminophenols Aerobic Oxidation [PDF]
Iranian Journal of Chemistry & Chemical Engineering, 2023 Biomimetic chemistry is a new environment-friendly approach that is inspired by biological processes, to produce new catalysts, and to develop ‘green’ synthetic routes to chemical catalysts based on the benefits of biological systems, aimed to find ...
Abdeslam Mouadili +2 more
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Purification and Characterization of Polyphenol Oxidase in the Fruits of Opuntia ficus-indica
Biology, 2023 Firstly, polyphenol oxidase (PPO) was purified from the fruits of Opuntia ficus-indica using Sepharose 4B–L-tyrosine–p-aminobenzoic acid affinity chromatography, and the enzyme was characterized. The PPO was purified 20.59-fold.
Dudu Demir +2 more
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Coupled Oxidative Degradation of Blueberry Anthocyanins Induced by Catechol
Shipin gongye ke-ji, 2022 In order to clarify the degradation pathway of anthocyanins in blueberry during storage and processing，the mechanism of coupled oxidation of anthocyanins-polyphenol oxidase-catechol was systematically studied, and the dose-response relationship among ...
Shaoqian CAO, Kai JIANG, Liang LIU
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