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polyphenol oxidase/zahnkaries
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9 Ergebnisse
Functional interaction of diphenols with polyphenol oxidase. Molecular determinants of substrate/inhibitor specificity.
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Polyphenol oxidase (PPO) catalyzes the oxidation of o-diphenols to their respective quinones. The quinones autopolymerize to form dark pigments, an undesired effect. PPO is therefore the target for the development of antibrowning and antimelanization agents. A series of phenolic compounds
Virulence factors of Porphyromonas gingivalis are modified by polyphenol oxidase and asparaginase.
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Porphyromonas gingivalis is a well-adapted pathogen of the periodontal pocket distinguished by its wide array of proteolytic activities and its ability to adhere to multiple substrata in the oral cavity. Microbial proteins with binding functions (such as adhesins and enzymes) very often contain
A specific amino acid residue in the catalytic site of dandelion polyphenol oxidases acts as 'selector' for substrate specificity.
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Successful site-directed mutagenesis combined with in silico modeling and docking studies for the first time offers experimental proof of the role of the 'substrate selector' residue in plant polyphenol oxidases. The plant and fungi enzymes responsible for tissue browning are called
Binding geometry, stoichiometry, and thermodynamics of cyclomalto-oligosaccharide (cyclodextrin) inclusion complex formation with chlorogenic acid, the major substrate of apple polyphenol oxidase.
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The inclusion complexes of cyclomaltohexaose (alpha-CD), cyclomaltoheptaose (beta-CD), cyclomaltooctaose (gamma-CD), and polymerized beta-CD (beta-CDn) with chlorogenic acid (CA), the major substrate of apple fruit polyphenol oxidase (PPO), were studied with regard to pH, ionic strength, and
Ultrastructural changes and oxidative stress markers in wild and cultivar Sesamum orientale L. following Alternaria sesami (Kawamura) Mohanty and Behera. inoculation.
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Alternaria sesami causes leaf spot disease in Sesamum orientale. Conidium germination, inoculation, penetration and colonization of the pathogen on the plant surfaces were studied using scanning electron microscopy. Electron microscopy analysis revealed multiple germ tubes from conidium that spread
Docking simulation and competitive experiments validate the interaction between the 2,5-xylidine inhibitor and Rigidoporus lignosus laccase.
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Laccases are polyphenol oxidases which oxidize a broad range of reducing substrates, preferably phenolic compounds, and their use in biotechnological applications is increasing. Recently, the first X-ray structure of active laccase from white rot fungus Rigidoporus lignosus has been reported
Effects of mouldy core and core rot on physiological and biochemical responses of apple fruit.
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BACKGROUND
Apple mouldy core (MC) and core rot (CR) are pathogenic disorders associated with the core region of fruits of susceptible varieties that have open calyx tubes. MC is not economically important because its symptoms are restricted to within the seed cavities, but CR is an important
Synthesis of Theaflavins and Their Functions.
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Numerous epidemiological and interventional clinical studies have consistently reported that black tea is good for human health. The polyphenolic compound, theaflavin, and its galloyl esters (theaflavins) are the primary red pigments in black tea that possess several health benefits, including
Mechanisms of chronic disease causation by nutritional factors and tobacco products and their prevention by tea polyphenols.
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The beverage tea, from the top leaves of the plant Camellia sinensis is one of the most widely used beverages in the world, second only to water. Black and green tea have mostly similar actions. The active components are polyphenols, mainly epigallocatechin gallate in green tea, and the tea leaf
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