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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad1igsa_ 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

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyRibulose-phoshate binding barrel 8043259 3000216 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AIGPSe1igsA1 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: IGPSECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A3.20.20.70 Alpha Beta Alpha-Beta Barrel TIM Barrel Aldolase class ICATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
INDOLE-3-GLYCEROLPHOSPHATE SYNTHASE -

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

ChainsEnzyme NameDescriptionCatalytic 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
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