This is a family of glycine reductase, sarcosine reductase and betaine reductases. These enzymes catalyse the following reactions. sarcosine reductase: Acetyl phosphate + methylamine + thioredoxin disulphide = N-methylglycine + phosphate + thioredoxin Acetyl phosphate + NH(3) + thioredoxin disulphide = glycine + phosphate + thioredoxin. betaine reductase: Acetyl phosphate + trimethylamine + thioredoxin disulphide = N,N,N-trimethylglycine + phosphate + thioredoxin [1].

1: Purification and characterization of protein PB of betaine reductase and its relationship to the corresponding proteins glycine reductase and sarcosine reductase from Eubacterium acidaminophilum. Meyer M, Granderath K, Andreesen JR; Eur J Biochem 1995;234:184-191. PMID:8529639