Enables fatty-acyl-CoA binding activity; flavin adenine dinucleotide binding activity; and glutaryl-CoA dehydrogenase activity. Involved in fatty acid oxidation and fatty-acyl-CoA biosynthetic process. Predicted to be located in mitochondrion. Human ortholog(s) of this gene implicated in glutaric acidemia I. Orthologous to human GCDH (glutaryl-CoA dehydrogenase); PARTICIPATES IN 2-aminoadipic 2-oxoadipic aciduria pathway; carnitine palmitoyltransferase I deficiency pathway; ethylmalonic encephalopathy pathway; INTERACTS WITH (+)-schisandrin B; 17beta-estradiol; 2,3,7,8-tetrachlorodibenzodioxine.