1.3.8.5	2-methylbutanoyl-CoA + electron-transfer flavoprotein = (E)-2-methylbut-2-enoyl-CoA + reduced electron-transfer flavoprotein + H+	-	-	
1.3.8.5	2-methylbutanoyl-CoA + electron-transfer flavoprotein = (E)-2-methylbut-2-enoyl-CoA + reduced electron-transfer flavoprotein + H+	reaction mechanism determining substrate specificity	656162	
1.3.8.5	2-methylbutanoyl-CoA + electron-transfer flavoprotein = (E)-2-methylbut-2-enoyl-CoA + reduced electron-transfer flavoprotein + H+	the isovaleryl-CoA dehydrogenase 1, i.e. IVD1, EC 1.3.99.10, from Solanum tuberosum shows maximal activity with 2-methylbutyryl-CoA, the binding pockets of 2-methylbutyryl-CoA and isovaleryl-CoA dehydrogenase are nearly identical, the enzyme therefore shall also be classified to EC 1.3.99.12, active site structure, residues Met361, Ala365, Val88, Val92, and Val96 are involved in catalysis	656288