- obsolete quinolinate synthetase complex
OBSOLETE. A heterodimer which acts as a quinolinate synthetase; quinolinate synthetase B (L-aspartate oxidase) catalyzes the oxidation of L-aspartate to L-iminoaspartate; quinolinate synthetase A condenses L-imidoaspartate and dihydroxyacetone to quinolinate.
- branched-chain-amino-acid transaminase activity
Catalysis of the reaction: a branched-chain amino acid (L-leucine, L-isoleucine and L-valine) + 2-oxoglutarate = L-glutamate + a 2-oxocarboxylate derived from the branched-chain amino acid.
- protein methylthiotransferase activity
Catalysis of the reaction: 2 S-adenosyl-L-methionine + a [ribosomal protein S12] L-aspartate89 + a sulfurated [sulfur carrier] + a reduced electron acceptor = S-adenosyl-L-homocysteine + L-methionine + 5'-deoxyadenosine + 2 H+ + a [ribosomal protein S12] 3-methylthio-L-aspartate89 + an unsulfurated [sulfur carrier] + an oxidized electron acceptor.
- glutamate synthase (NADPH) activity
Catalysis of the reaction: 2 L-glutamate + NADP+ = 2-oxoglutarate + L-glutamine + H+ + NADPH. This is a two-step reaction: (a) L-glutamate + NH3 = L-glutamine + H2O, (b) L-glutamate + NADP+ + H2O = NH3 + 2-oxoglutarate + NADPH + H+.