Enables flavin adenine dinucleotide binding activity; folic acid binding activity; and sarcosine dehydrogenase activity. Involved in tetrahydrofolate interconversion. Located in mitochondrial matrix. Human ortholog(s) of this gene implicated in sarcosinemia. Orthologous to human SARDH (sarcosine dehydrogenase). [provided by Alliance of Genome Resources, Apr 2022]