Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad1ofda1 All beta proteins Single-stranded right-handed beta-helix Alpha subunit of glutamate synthase, C-terminal domain Alpha subunit of glutamate synthase, C-terminal domain Alpha subunit of glutamate synthase, C-terminal domain (Synechocystis sp. PCC 6803 ) [TaxId: 1148 ], SCOPe (2.08)
Ad1ofda2 Alpha and beta proteins (a/b) TIM beta/alpha-barrel FMN-linked oxidoreductases FMN-linked oxidoreductases Alpha subunit of glutamate synthase, central and FMN domains (Synechocystis sp. PCC 6803 ) [TaxId: 1148 ], SCOPe (2.08)
Ad1ofda3 Alpha and beta proteins (a+b) Ntn hydrolase-like N-terminal nucleophile aminohydrolases (Ntn hydrolases) Class II glutamine amidotransferases Alpha subunit of glutamate synthase, N-terminal domain (Synechocystis sp. PCC 6803 ) [TaxId: 1148 ], SCOPe (2.08)
Bd1ofdb1 All beta proteins Single-stranded right-handed beta-helix Alpha subunit of glutamate synthase, C-terminal domain Alpha subunit of glutamate synthase, C-terminal domain Alpha subunit of glutamate synthase, C-terminal domain (Synechocystis sp. PCC 6803 ) [TaxId: 1148 ], SCOPe (2.08)
Bd1ofdb2 Alpha and beta proteins (a/b) TIM beta/alpha-barrel FMN-linked oxidoreductases FMN-linked oxidoreductases Alpha subunit of glutamate synthase, central and FMN domains (Synechocystis sp. PCC 6803 ) [TaxId: 1148 ], SCOPe (2.08)
Bd1ofdb3 Alpha and beta proteins (a+b) Ntn hydrolase-like N-terminal nucleophile aminohydrolases (Ntn hydrolases) Class II glutamine amidotransferases Alpha subunit of glutamate synthase, N-terminal domain (Synechocystis sp. PCC 6803 ) [TaxId: 1148 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2 FamilyGltS central region-like 8003242 4003980 SCOP2 (2022-06-29)
ASCOP2 FamilyGXGXG-motif containing domain 8003318 4000235 SCOP2 (2022-06-29)
ASCOP2 FamilyAlpha subunit of glutamate synthase, GAT domain-like 8003377 4000340 SCOP2 (2022-06-29)
ASCOP2 SuperfamilyFMN-linked oxidoreductases 8003316 3000014 SCOP2 (2022-06-29)
ASCOP2 SuperfamilyGXGXG domain-like 8003319 3000109 SCOP2 (2022-06-29)
ASCOP2 SuperfamilyClass II glutamine amidotransferases 8003378 3000131 SCOP2 (2022-06-29)
BSCOP2B SuperfamilyClass II glutamine amidotransferases 8003378 3000131 SCOP2B (2022-06-29)
BSCOP2B SuperfamilyGXGXG domain-like 8003319 3000109 SCOP2B (2022-06-29)
BSCOP2B SuperfamilyFMN-linked oxidoreductases 8003316 3000014 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AGXGXGe1ofdA2 A: beta duplicates or obligate multimersX: Single-stranded right-handed beta-helixH: Alpha subunit of glutamate synthase-C (From Topology)T: Alpha subunit of glutamate synthase-CF: GXGXGECOD (1.6)
AGATase_2_2nde1ofdA1 A: a+b two layersX: Alpha-beta plaitsH: Alpha subunit of glutamate synthase, insertion domain (From Topology)T: Alpha subunit of glutamate synthase, insertion domainF: GATase_2_2ndECOD (1.6)
AGATase_2_1ste1ofdA3 A: a+b four layersX: Ntn/PP2CH: NtnT: Class II glutamine amidotransferasesF: GATase_2_1stECOD (1.6)
AGlu_synthasee1ofdA5 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: Glu_synthaseECOD (1.6)
AGlu_syn_centrale1ofdA4 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: Glu_syn_centralECOD (1.6)
BGXGXGe1ofdB2 A: beta duplicates or obligate multimersX: Single-stranded right-handed beta-helixH: Alpha subunit of glutamate synthase-C (From Topology)T: Alpha subunit of glutamate synthase-CF: GXGXGECOD (1.6)
BGATase_2_2nde1ofdB1 A: a+b two layersX: Alpha-beta plaitsH: Alpha subunit of glutamate synthase, insertion domain (From Topology)T: Alpha subunit of glutamate synthase, insertion domainF: GATase_2_2ndECOD (1.6)
BGATase_2_1ste1ofdB3 A: a+b four layersX: Ntn/PP2CH: NtnT: Class II glutamine amidotransferasesF: GATase_2_1stECOD (1.6)
BGlu_synthasee1ofdB4 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: Glu_synthaseECOD (1.6)
BGlu_syn_centrale1ofdB5 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: Glu_syn_centralECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A, B
PF01645Conserved region in glutamate synthase (Glu_synthase)Conserved region in glutamate synthaseThis family represents a region of the glutamate synthase protein. This region is expressed as a separate subunit in the glutamate synthase alpha subunit from archaebacteria, or part of a large multidomain enzyme in other organisms. The aligned regi ...This family represents a region of the glutamate synthase protein. This region is expressed as a separate subunit in the glutamate synthase alpha subunit from archaebacteria, or part of a large multidomain enzyme in other organisms. The aligned region of these proteins contains a putative FMN binding site and Fe-S cluster.
Domain
A, B
PF01493GXGXG motif (GXGXG)GXGXG motif- Family
A, B
PF00310Glutamine amidotransferases class-II (GATase_2)Glutamine amidotransferases class-II- Domain
A, B
PF04898Glutamate synthase central domain (Glu_syn_central)Glutamate synthase central domainThe central domain of glutamate synthase connects the amino terminal amidotransferase domain with the FMN-binding domain and has an alpha / beta overall topology [1]. This domain appears to be a rudimentary form of the FMN-binding TIM barrel accordi ...The central domain of glutamate synthase connects the amino terminal amidotransferase domain with the FMN-binding domain and has an alpha / beta overall topology [1]. This domain appears to be a rudimentary form of the FMN-binding TIM barrel according to SCOP.
Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A, B
FERREDOXIN-DEPENDENT GLUTAMATE SYNTHASE 2 -

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

ChainsEnzyme NameDescriptionCatalytic Residues
glutamate synthase (ferredoxin)  M-CSA #111

Binds a [3Fe-4S] cluster as well as FAD and FMN. The protein is composed of two domains, one hydrolysing L-glutamine to ammonia and L-glutamate (cf. EC 3.5.1.2, glutaminase), the other combines the produced ammonia with 2-oxoglutarate to produce a second molecule of L-glutamate. The ammonia is channelled through a tunnel in the active protein. This tunnel provides a micro-environment that prevents the protonation of the ammonia, crucial as the enzyme will not function with ammonium as the nitrogen source. The hydrolysis reaction only occurs when ferredoxin and 2-oxoglutarate are bound to the protein.

Defined by 9 residues: CYS:A-1ARG:A-31PHE:A-207ASN:A-227GLY:A-228GLU:A-903GLN:A-969LYS:A-972GLN:A-978
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Explore in 3DM-CSA Motif Definition
Extent of motif is too large to support Structure Motif searching.
EC: 1.4.7.1 (PDB Primary Data)