Choline oxidase

In enzymology, choline oxidase is an enzyme that catalyzes two consecutive chemical reactions
The two substrates of this enzyme are choline and oxygen. The first reaction gives betaine aldehyde and hydrogen peroxide. The aldehyde intermediate is then further oxidised to trimethylglycine.
This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with oxygen as acceptor. The systematic name of this enzyme class is choline:oxygen 1-oxidoreductase. This enzyme participates in glycine, serine, and threonine metabolism. It employs one cofactor, flavin [adenine dinucleotide|FAD].