Sarcosine oxidase is a hetero-tetrameric enzyme that contains both covalently bound FMN and non-covalently bound FAD and NAD+. This enzyme catalyzes the oxidative demethylation of sarcosine to yield glycine, H2O2, and 5,10-CH2-tetrahydrofolate (H4folate) in a reaction requiring H4folate and O2 [1, 2].
Eschenbrenner M, Chlumsky LJ, Khanna P, Strasser F, Jorns MS.
Organization of the multiple coenzymes and subunits and role of the covalent flavin link in the complex heterotetrameric sarcosine oxidase.
Biochemistry 40 5352-67 2001
[PubMed: 11330998] http://dx.doi.org/10.1021/bi010101p
2.
Chlumsky LJ, Zhang L, Jorns MS.
Sequence analysis of sarcosine oxidase and nearby genes reveals homologies with key enzymes of folate one-carbon metabolism.
J. Biol. Chem. 270 18252-9 1995
[PubMed: 7543100] http://dx.doi.org/10.1074/jbc.270.31.18252