oxoglutarate dehydrogenase (succinyl-transferring) activity

Catalysis of the reaction: 2-oxoglutarate + lipoamide = S-succinyldihydrolipoamide + CO2.

2-ketoglutarate dehydrogenase activity, 2-oxoglutarate dehydrogenase activity, 2-oxoglutarate: lipoate oxidoreductase activity, 2-oxoglutarate:dihydrolipoyllysine-residue succinyltransferase-lipoyllysine 2-oxidoreductase (decarboxylating, acceptor-succinylating), 2-oxoglutarate:lipoamide 2-oxidoreductase (decarboxylating and acceptor-succinylating) activity, AKGDH activity, OGDC activity, alpha-ketoglutarate dehydrogenase activity, alpha-ketoglutaric acid dehydrogenase activity, alpha-ketoglutaric dehydrogenase activity, alpha-oxoglutarate dehydrogenase activity, ketoglutaric dehydrogenase activity, oxoglutarate decarboxylase activity, oxoglutarate dehydrogenase (lipoamide) activity, oxoglutarate dehydrogenase (succinyl-transferring) activity, oxoglutarate dehydrogenase activity