1IGS
INDOLE-3-GLYCEROLPHOSPHATE SYNTHASE FROM SULFOLOBUS SOLFATARICUS AT 2.0 A RESOLUTION
Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage
Chains | Domain Info | Class | Fold | Superfamily | Family | Domain | Species | Provenance Source (Version) |
---|---|---|---|---|---|---|---|---|
A | d1igsa_ | Alpha and beta proteins (a/b) | TIM beta/alpha-barrel | Ribulose-phoshate binding barrel | Tryptophan biosynthesis enzymes | Indole-3-glycerophosphate synthase, IPGS | (Saccharolobus solfataricus ) [TaxId: 2287 ], | SCOPe (2.08) |
Domain Annotation: SCOP2 Classification SCOP2 Database Homepage
Domain Annotation: ECOD Classification ECOD Database Homepage
Domain Annotation: CATH CATH Database Homepage
Chain | Domain | Class | Architecture | Topology | Homology | Provenance Source (Version) |
---|---|---|---|---|---|---|
A | 3.20.20.70 | Alpha Beta | Alpha-Beta Barrel | TIM Barrel | Aldolase class I | CATH (4.3.0) |
Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage
InterPro: Protein Family Classification InterPro Database Homepage
Chains | Accession | Name | Type |
---|---|---|---|
IPR013798 | Indole-3-glycerol phosphate synthase domain | Domain | |
IPR011060 | Ribulose-phosphate binding barrel | Homologous Superfamily | |
IPR001468 | Indole-3-glycerol phosphate synthase, conserved site | Conserved Site | |
IPR013785 | Aldolase-type TIM barrel | Homologous Superfamily | |
IPR045186 | Indole-3-glycerol phosphate synthase | Family |
Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage
Chains | Enzyme Name | Description | Catalytic Residues |
---|---|---|---|
indole-3-glycerol-phosphate synthase M-CSA #252 | Indole-3-glycerol phosphate synthase (EC:4.1.1.48) (IGPS) catalyses the fourth step in the biosynthesis of tryptophan, the ring closure of 1-(2-carboxy-phenylamino)-1-deoxyribulose into indol-3-glycerol-phosphate. In some bacteria, IGPS is a single chain enzyme. In others, such as Escherichia coli, it is the N-terminal domain of a bifunctional enzyme that also catalyses N-(5'-phosphoribosyl)anthranilate isomerase (EC:5.3.1.24) (PRAI) activity. In fungi, IGPS is the central domain of a trifunctional enzyme that contains a PRAI C-terminal domain and a glutamine amidotransferase (EC:2.4.2) (GATase) N-terminal domain. | Defined by 7 residues: GLU:A-51LYS:A-53LYS:A-110GLU:A-159ASN:A-180GLU:A-210SER:A-211 | EC: 4.1.1.48 (UniProt) |