Annotations: 1LBM

CRYSTAL STRUCTURE OF PHOSPHORIBOSYL ANTHRANILATE ISOMERASE (PRAI) IN COMPLEX WITH REDUCED 1-(O-CARBOXYPHENYLAMINO)-1-DEOXYRIBULOSE 5-PHOSPHATE (RCDRP)

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Structure Motif: Primary M-CSA Annotation

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1lbma_	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	Ribulose-phoshate binding barrel	Tryptophan biosynthesis enzymes	N-(5'phosphoribosyl)antranilate isomerase, PRAI	(Thermotoga maritima ) [TaxId: 2336 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Ribulose-phoshate binding barrel	8043257	3000216	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	NAD_binding_3	e1lbmA1	A: alpha arrays	X: C-terminal subdomain in Lon-related proteases catalytic domains	H: C-terminal subdomain in Lon-related proteases catalytic domains	T: C-terminal subdomain in Lon-related proteases catalytic domains	F: NAD_binding_3	ECOD (v295.2)

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)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00697	N-(5'phosphoribosyl)anthranilate (PRA) isomerase (PRAI)	N-(5'phosphoribosyl)anthranilate (PRA) isomerase		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	PHOSPHORIBOSYL ANTHRANILATE ISOMERASE	phosphoribosylanthranilate isomerase activity isomerase activity intramolecular oxidoreductase activity, interconverting aldoses and ketoses intramolecular oxidoreductase activity catalytic activity	oxoacid metabolic process indole-containing compound metabolic process amino acid metabolic process carboxylic acid biosynthetic process biogenic amine biosynthetic process indole-containing compound biosynthetic process small molecule metabolic process indolalkylamine biosynthetic process aromatic amino acid biosynthetic process aromatic amino acid metabolic process small molecule biosynthetic process carboxylic acid metabolic process primary metabolic process L-tryptophan biosynthetic process oxoacid metabolic process indole-containing compound metabolic process amino acid metabolic process carboxylic acid biosynthetic process biogenic amine biosynthetic process indole-containing compound biosynthetic process small molecule metabolic process indolalkylamine biosynthetic process aromatic amino acid biosynthetic process aromatic amino acid metabolic process small molecule biosynthetic process carboxylic acid metabolic process primary metabolic process L-tryptophan biosynthetic process proteinogenic amino acid metabolic process amine metabolic process amino acid biosynthetic process biosynthetic process amine biosynthetic process proteinogenic amino acid biosynthetic process metabolic process cellular process erythrose 4-phosphate/phosphoenolpyruvate family amino acid biosynthetic process biogenic amine metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR011060	Ribulose-phosphate binding barrel	Homologous Superfamily
A	IPR001240	N-(5'phosphoribosyl) anthranilate isomerase (PRAI) domain	Domain
A	IPR013785	Aldolase-type TIM barrel	Homologous Superfamily
A	IPR044643	N-(5'-phosphoribosyl)anthranilate isomerase family	Family

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

Chains	Enzyme Name	Description	Catalytic Residues
A	phosphoribosylanthranilate isomerase M-CSA #328	Phosphoribosyl anthranilate isomerase is a key enzyme in the biosynthesis of tryptophan, catalysing the interconversion of the aminoaldose phosphoribosyl anthranilate (PRA) and the aminoketose 1-[(2-carboxyphen-yl) amino]-1-deoxyribulose 5-phosphate (CdRP). It shares significant structural and sequence homology to other aldose-ketose isomerases, notably the analogous enzyme in the Histidine biosynthesis pathway, HisA which catalyses a similar reaction. The two are assumed to follow the same mechanism, namely Amadori rearrangement with acid base catalysis.	Defined by 2 residues: CYS:A-7ASP:A-126 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 5.3.1.24 (PDB Primary Data) Search M-CSA Motif + EC 5.3.1.24