Is Polyphenol Oxidase the Same as Catechol Oxidase?

Elena Rostova
Elena Rostova
• • 6 min read

Polyphenol Oxidases Polyphenol Oxidases Polyphenol Oxidase (Ppo; Also Polyphenol Oxidase I, Chloroplastic), an Enzyme Involved in Fruit Browning, Is a Tetramer...

Is Polyphenol Oxidase the Same as Catechol Oxidase?

Polyphenol oxidases

Polyphenol oxidases
Polyphenol oxidase (PPO; also polyphenol oxidase i, chloroplastic), an enzyme involved in fruit browning, is a tetramer that contains four atoms of copper per molecule. ... PPO catalyses the rapid polymerization of o-quinones to produce black, brown or red pigments (polyphenols) that cause fruit browning.
› wiki › Polyphenol_oxidase
(PPOs) are copper containing enzymes that are nearly ubiquitous among plants (Mayer, 2006). They have catechol oxidase activity (oxidation of o-diphenols to their corresponding o-quinones, EC 1.10.

Is catechol a polyphenol?

Catechol type polyphenol is a potential modifier of protein sulfhydryls: development and application of a new probe for understanding the dietary polyphenol actions. Chem Res Toxicol. 2009 Oct;22(10):1689-98.

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What type of enzyme class is polyphenol oxidase?

Polyphenol oxidases (PPOs) are a group of copper-containing enzymes that catalyze the o-hydroxylation of monophenols to o-diphenols (tyrosinase activity, Enzyme Commission 1.14. 18.1) as well as the oxidation of o-diphenols to quinones (catecholase activity, Enzyme Commission 1.10. 3.2) in the presence of oxygen.

Elena Rostova

Elena Rostova

Lead Health, Wellness & Medical Journalist
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Elena Rostova holds a Master's degree in Public Health Journalism. She covers groundbreaking medical research, holistic wellness trends, mental health awareness, and nutritional science.