1OX6

TOWARDS UNDERSTANDING THE MECHANISM OF THE COMPLEX CYCLIZATION REACTION CATALYZED BY IMIDAZOLE GLYCEROPHOSPHATE SYNTHASE

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

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d1ox6b1	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	Ribulose-phoshate binding barrel	Histidine biosynthesis enzymes	Cyclase subunit (or domain) of imidazoleglycerolphosphate synthase HisF	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
B	d1ox6b2	Alpha and beta proteins (a/b)	Flavodoxin-like	Class I glutamine amidotransferase-like	Class I glutamine amidotransferases (GAT)	GAT subunit, HisH, (or domain) of imidazoleglycerolphosphate synthase HisF	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
B	d1ox6b3	Artifacts	Tags	Tags	Tags	N-terminal Tags	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
A	d1ox6a1	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	Ribulose-phoshate binding barrel	Histidine biosynthesis enzymes	Cyclase subunit (or domain) of imidazoleglycerolphosphate synthase HisF	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
A	d1ox6a2	Alpha and beta proteins (a/b)	Flavodoxin-like	Class I glutamine amidotransferase-like	Class I glutamine amidotransferases (GAT)	GAT subunit, HisH, (or domain) of imidazoleglycerolphosphate synthase HisF	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
A	d1ox6a3	Artifacts	Tags	Tags	Tags	N-terminal Tags	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	Ribulose-phoshate binding barrel	8037407	3000216	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Class I glutamine amidotransferase-like	8037409	3001405	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Class I glutamine amidotransferase-like	8037409	3001405	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Ribulose-phoshate binding barrel	8037407	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)
B	His_biosynth	e1ox6B1	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: His_biosynth	ECOD (1.6)
B	GATase	e1ox6B2	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: Class I glutamine amidotransferase-like	F: GATase	ECOD (1.6)
A	His_biosynth	e1ox6A1	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: His_biosynth	ECOD (1.6)
A	GATase	e1ox6A2	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: Class I glutamine amidotransferase-like	F: GATase	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	3.40.50.880	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Class I glutamine amidotransferase (GATase) domain	CATH (4.3.0)
B	3.20.20.70	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Aldolase class I	CATH (4.3.0)
A	3.40.50.880	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Class I glutamine amidotransferase (GATase) domain	CATH (4.3.0)
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, B	PF00117	Glutamine amidotransferase class-I (GATase)	Glutamine amidotransferase class-I	-	Domain
A, B	PF00977	Histidine biosynthesis protein (His_biosynth)	Histidine biosynthesis protein	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Imidazole glycerol phosphate synthase hisHF	hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds, in linear amides glutaminase activity hydrolase activity catalytic activity hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds imidazoleglycerol-phosphate synthase activity pentosyltransferase activity glycosyltransferase activity transferase activity oxo-acid-lyase activity lyase activity carbon-carbon lyase activity	glutamine metabolic process oxoacid metabolic process cellular metabolic process carboxylic acid metabolic process amino acid metabolic process primary metabolic process organic acid metabolic process alpha-amino acid metabolic process L-amino acid metabolic process glutamine family amino acid metabolic process proteinogenic amino acid metabolic process metabolic process small molecule metabolic process cellular process glutamine metabolic process oxoacid metabolic process cellular metabolic process carboxylic acid metabolic process amino acid metabolic process primary metabolic process organic acid metabolic process alpha-amino acid metabolic process L-amino acid metabolic process glutamine family amino acid metabolic process proteinogenic amino acid metabolic process metabolic process small molecule metabolic process cellular process cellular biosynthetic process organic acid biosynthetic process imidazole-containing compound metabolic process carboxylic acid biosynthetic process aromatic amino acid family biosynthetic process aromatic amino acid metabolic process small molecule biosynthetic process L-histidine metabolic process L-amino acid biosynthetic process amino acid biosynthetic process biosynthetic process L-histidine biosynthetic process proteinogenic amino acid biosynthetic process alpha-amino acid biosynthetic process	intracellular anatomical structure cytoplasm cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR029062	Class I glutamine amidotransferase-like	Homologous Superfamily
A, B	IPR004651	Histidine biosynthesis, HisF	Family
A, B	IPR050064	Imidazole glycerol phosphate synthase HisA/HisF	Family
A, B	IPR013785	Aldolase-type TIM barrel	Homologous Superfamily
A, B	IPR010139	Imidazole glycerol phosphate synthase, subunit H	Family
A, B	IPR017926	Glutamine amidotransferase	Domain
A, B	IPR011060	Ribulose-phosphate binding barrel	Homologous Superfamily
A, B	IPR006062	Histidine biosynthesis protein	Family
A, B	IPR014640	Imidazole glycerol phosphate synthase HisHF	Family

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.