Enables chaperone binding activity; heat shock protein binding activity; and oxoglutarate dehydrogenase (succinyl-transferring) activity. Involved in several processes, including 2-oxoglutarate metabolic process; succinyl-CoA metabolic process; and tricarboxylic acid cycle. Located in mitochondrion. Part of oxoglutarate dehydrogenase complex. Orthologous to human OGDH (oxoglutarate dehydrogenase). [provided by Alliance of Genome Resources, Apr 2022]