glutamate synthase (NADPH)

This is an abbreviated version!
For detailed information about glutamate synthase (NADPH), go to the full flat file.

Word Map on EC


2 L-glutamate +



EC, EhNO1, EhNO2, gltA, gltB, GltB1, GltB2, gltD, GltS, glutamate synthetase (NADP), glutamine amide-2-oxoglutarate aminotransferase (oxidoreductase, NADP), glutamine-ketoglutaric aminotransferase, GOGAT, L-glutamate synthase, L-glutamate synthetase, L-glutamine:2-oxoglutarate aminotransferase, NADPH oxidizing, NADPH-dependent glutamate synthase, NADPH-GltS, NADPH-glutamate synthase, NADPH-GOGAT, NADPH-linked glutamate synthase, pGLTY1, pGLTY2, pGLTZ, PH0876, PH1873, synthase, glutamate (reduced nicotinamide adenine dinucleotide phosphate)


     1 Oxidoreductases
         1.4 Acting on the CH-NH2 group of donors
             1.4.1 With NAD+ or NADP+ as acceptor
       glutamate synthase (NADPH)

Systematic Name

Systematic Name on EC - glutamate synthase (NADPH)

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IUBMB Comments
L-glutamate:NADP+ oxidoreductase (transaminating)
Binds FMN, FAD, 2 [4Fe-4S] clusters and 1 [3Fe-4S] cluster. The reaction takes place in the opposite direction to that shown. The protein is composed of two subunits, alpha and beta. The alpha subunit is composed of two domains, one hydrolysing L-glutamine to NH3 and L-glutamate (cf. EC, glutaminase), the other combining the produced NH3 with 2-oxoglutarate to produce a second molecule of L-glutamate (cf. EC, glutamate dehydrogenase [NADP+]). The beta subunit transfers electrons to the cosubstrate. The NH3 is channeled through a 31 A channel in the active protein. In the absence of the beta subunit, coupling between the two domains of the alpha subunit is compromised and some ammonium can be produced. In the intact alphabeta complex, ammonia production only takes place as part of the overall reaction.