2A0N

Crystal structure of Imidazole glycerol phosphate synthase subunit hisF (EC 4.1.3.-) (tm1036) from Thermotoga maritima at 1.64 A resolution

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	d2a0na_	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	Ribulose-phoshate binding barrel	Histidine biosynthesis enzymes	automated matches	(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	8043236	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	His_biosynth	e2a0nA1	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: His_biosynth	ECOD (1.6)

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	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	Imidazole glycerol phosphate synthase subunit hisF	lyase activity catalytic activity imidazoleglycerol-phosphate synthase activity pentosyltransferase activity glycosyltransferase activity transferase activity	organonitrogen compound metabolic process small molecule biosynthetic process oxoacid metabolic process cellular biosynthetic process cellular metabolic process organonitrogen compound biosynthetic process carboxylic acid metabolic process organic acid biosynthetic process organic acid metabolic process carboxylic acid biosynthetic process organic substance metabolic process biosynthetic process organic substance biosynthetic process small molecule metabolic process organonitrogen compound metabolic process small molecule biosynthetic process oxoacid metabolic process cellular biosynthetic process cellular metabolic process organonitrogen compound biosynthetic process carboxylic acid metabolic process organic acid biosynthetic process organic acid metabolic process carboxylic acid biosynthetic process organic substance metabolic process biosynthetic process organic substance biosynthetic process small molecule metabolic process metabolic process cellular process histidine metabolic process histidine biosynthetic process	intracellular anatomical structure cytoplasm cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR011060	Ribulose-phosphate binding barrel	Homologous Superfamily
A	IPR004651	Histidine biosynthesis, HisF	Family
A	IPR013785	Aldolase-type TIM barrel	Homologous Superfamily
A	IPR006062	Histidine biosynthesis protein	Family

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

Chains	Enzyme Name	Description	Catalytic Residues
A	imidazole glycerol phosphate synthase M-CSA #753	The HisF subunit of Thermotoga maritima imidazole glycerol phosphate (ImGP) synthase catalyses the reaction of N'-((5'-phosphoribulosyl)formimino)-5-aminoimidazole-4-carboxamide-ribonucleotide (PRFAR) with ammonia to form an imine, loss of 5-aminoimidazole-4-carboxamide ribotide (AICAR), and the subsequent cyclisation to form ImGP. This reaction is the second half of the fifth step in histidine biosynthesis. ImGP and AICAR are used in histidine and purine biosynthesis respectively. Ammonia is delivered to the active site directly from an associated subunit, HisH, which hydrolyses glutamine to glutamate.	Defined by 2 residues: ASP:A-23 [auth A-11]ASP:A-142 [auth A-130] \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 4.1.3 (PDB Primary Data) Search M-CSA Motif + EC 4.1.3

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.