Pyruvate Oxidase

In enzymology, a pyruvate oxidase (EC 1.2.3.3) is an enzyme that catalyzes the chemical reaction

pyruvate + phosphate + O₂ acetyl phosphate + CO₂ + H₂O₂

The 3 substrates of this enzyme are pyruvate, phosphate, and O₂, whereas its 3 products are acetyl phosphate, CO₂, and H₂O₂.

This enzyme belongs to the family of oxidoreductases, specifically those acting on the aldehyde or oxo group of donor with oxygen as acceptor. The systematic name of this enzyme class is pyruvate:oxygen 2-oxidoreductase (phosphorylating). Other names in common use include pyruvic oxidase, and phosphate-dependent pyruvate oxidase. This enzyme participates in pyruvate metabolism. It has 2 cofactors: FAD, and Thiamin diphosphate.