Involved in glutamate biosynthesis. Required for non-photorespiratory ammonium assimilation. Probably involved in primary ammonium assimilation in roots.
Involved in glutamate biosynthesis and plays a major role in the primary ammonium ions assimilation in seedling roots. May be involved in the reutilization of glutamine in developing organs. Plays a role in the development of tillers.
Forms L-glutamate from L-glutamine and 2-oxoglutarate. Represents an alternative pathway to L-glutamate dehydrogenase for the biosynthesis of L-glutamate. Participates with glutamine synthetase in ammonia assimilation processes. The enzyme is specific for NADH, L-glutamine and 2-oxoglutarate.
GltS is a homodimer that synthesizes L-glutamate from 2-oxoglutarate and L-glutamine, an important step in ammonia assimilation in bacteria, cyanobacteria and plants. The N-terminal glutaminase domain catalyzes the hydrolysis of glutamine to glutamic acid and ammonia, and has a fold similar to that of other glutamine amidotransferases such as glucosamine-fructose 6-phosphate synthase (GLMS or GFAT), glutamine phosphoribosylpyrophosphate (Prpp) amidotransferase (GPATase), asparagine synthetase B (AsnB), and beta lactam synthetase (beta-LS), as well as the Ntn hydrolase folds of the proteasomal alpha and beta subunits. Length = 413
>gnl|CDD|223145 COG0067, GltB, Glutamate synthase domain 1 [Amino acid transport and metabolism]
GltS is a homodimer that synthesizes L-glutamate from 2-oxoglutarate and L-glutamine, an important step in ammonia assimilation in bacteria, cyanobacteria and plants. The N-terminal glutaminase domain catalyzes the hydrolysis of glutamine to glutamic acid and ammonia, and has a fold similar to that of other glutamine amidotransferases such as glucosamine-fructose 6-phosphate synthase (GLMS or GFAT), glutamine phosphoribosylpyrophosphate (Prpp) amidotransferase (GPATase), asparagine synthetase B (AsnB), and beta lactam synthetase (beta-LS), as well as the Ntn hydrolase folds of the proteasomal alpha and beta subunits.
>PF00310 GATase_2: Glutamine amidotransferases class-II; InterPro: IPR000583 A large group of biosynthetic enzymes are able to catalyse the removal of the ammonia group from glutamine and then to transfer this group to a substrate to form a new carbon-nitrogen group
This catalytic activity is known as glutamine amidotransferase (GATase) (2.4.2 from EC) []. The GATase domain exists either as a separate polypeptidic subunit or as part of a larger polypeptide fused in different ways to a synthase domain. On the basis of sequence similarities two classes of GATase domains have been identified [, ], class-I (also known as trpG-type) and class-II (also known as purF-type). Enzymes containing Class-II GATase domains include amido phosphoribosyltransferase (glutamine phosphoribosylpyrophosphate amidotransferase) (2.4.2.14 from EC), which catalyses the first step in purine biosynthesis (gene purF in bacteria, ADE4 in yeast); glucosamine--fructose-6-phosphate aminotransferase (2.6.1.16 from EC), which catalyses the formation of glucosamine 6-phosphate from fructose 6-phosphate and glutamine (gene glmS in Escherichia coli, nodM in Rhizobium, GFA1 in yeast); and asparagine synthetase (glutamine-hydrolizing) (6.3.5.4 from EC), which is responsible for the synthesis of asparagine from aspartate and glutamine. A cysteine is present at the N-terminal extremity of the mature form of all these enzymes. This domain is found in a number of cysteine peptidases belonging to MEROPS peptidase family C44 and their non-peptidase homologs. ; GO: 0008152 metabolic process; PDB: 1OFE_A 1LLW_A 1OFD_A 1LLZ_A 1LM1_A 1GPH_1 1AO0_D 3OOJ_E 1JXA_C 2J6H_B ....
GlxB is a glutamine amidotransferase-like protein of unknown function found in bacteria and archaea. GlxB has a structural fold similar to that of other class II glutamine amidotransferases including glucosamine-fructose 6-phosphate synthase (GLMS or GFAT), glutamine phosphoribosylpyrophosphate (Prpp) amidotransferase (GPATase), asparagine synthetase B (AsnB), beta lactam synthetase (beta-LS) and glutamate synthase (GltS). The GlxB fold is also somewhat similar to the Ntn (N-terminal nucleophile) hydrolase fold of the proteasomal alpha and beta subunits.
Structural Studies On The Synchronization Of Cataly
3e-04
>pdb|2VDC|A Chain A, The 9.5 A Resolution Structure Of Glutamate Synthase From Cryo-Electron Microscopy And Its Oligomerization Behavior In Solution: Functional Implications. Length = 1472
