Predicted to enable dihydrolipoyl dehydrogenase activity. Predicted to contribute to branched-chain alpha-keto acid dehydrogenase activity and pyruvate dehydrogenase (NAD+) activity. Predicted to be involved in glycine decarboxylation via glycine cleavage system. Located in Z disc. Is expressed in several structures, including adult head; embryonic/larval midgut primordium; gut section; larval muscle cell; and trunk visceral muscle primordium. Used to study amino acid metabolic disorder.