This entry represents the catalytic domain of several proteins which are closely related to NAD-glutamate dehydrogenase found in Streptomyces clavuligerus. Glutamate dehydrogenases (GDHs) are a broadly distributed group of enzymes that catalyse the reversible oxidative deamination of glutamate to ketoglutarate and ammonia [1]. The structure of GDH from Mycobacterium smegmatis revealed that it has long N- and C-terminal segments flanking the catalytic core which provide dimer-like interactions between pairs of monomers [2]. The N-terminal segment is flexible and contains ACT-like and PAS-type domains that may play a role as metabolic sensors for allosteric regulation [2].

1: A new class of glutamate dehydrogenases (GDH). Biochemical and genetic characterization of the first member, the AMP-requiring NAD-specific GDH of Streptomyces clavuligerus. Minambres B, Olivera ER, Jensen RA, Luengo JM; J Biol Chem 2000;275:39529-39542. PMID:10924516

2: 3D architecture and structural flexibility revealed in the subfamily of large glutamate dehydrogenases by a mycobacterial enzyme. Lazaro M, Melero R, Huet C, Lopez-Alonso JP, Delgado S, Dodu A, Bruch EM, Abriata LA, Alzari PM, Valle M, Lisa MN; Commun Biol. 2021;4:684. PMID:34083757