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ENZYME entry: EC

Accepted Name
glutamate synthase (NADPH).
Alternative Name(s)
glutamate (reduced nicotinamide adenine dinucleotide phosphate) synthase.
glutamate synthetase (NADP).
glutamine amide-2-oxoglutarate aminotransferase (oxidoreductase, NADP).
glutamine-ketoglutaric aminotransferase.
L-glutamate synthase.
L-glutamate synthetase.
NADPH-dependent glutamate synthase.
NADPH-glutamate synthase.
Reaction catalysed
2 L-glutamate + NADP(+) <=> 2-oxoglutarate + H(+) + L-glutamine + NADPH
  • The reaction takes place in the opposite direction.
  • The protein is composed of two subunits, alpha and beta.
  • The alpha subunit is composed of two domains, one hydrolyzing L-glutamine to NH3 and L-glutamate (cf. EC, the other combining the produced NH3 with 2-oxoglutarate to produce a second molecule of L-glutamate (cf. EC
  • The beta subunit transfers electrons from 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.
  • Formerly EC
PRIAM enzyme-specific profiles1.4.1.13
KEGG Ligand Database for Enzyme Nomenclature1.4.1.13
IUBMB Enzyme Nomenclature1.4.1.13
MEDLINEFind literature relating to
Rhea expert-curated reactions1.4.1.13
P39812, GLTA_BACSU;  Q05755, GLTB_AZOBR;  O34399, GLTB_BACSU;  
Q05756, GLTD_AZOBR;  O08340, GLTD_CERSP;  P09832, GLTD_ECOLI;  

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