2BLE

Structure of human guanosine monophosphate reductase GMPR1 in complex with GMP

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
Pharos: Disease Associations
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	d2blea_	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	Inosine monophosphate dehydrogenase (IMPDH)	automated matches	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Inosine monophosphate dehydrogenase (IMPDH)	8081559	3000263	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	IMPDH_1st	e2bleA1	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: IMPDH_1st	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	PF00478	IMP dehydrogenase / GMP reductase domain (IMPDH)	IMP dehydrogenase / GMP reductase domain	This family is involved in biosynthesis of guanosine nucleotide. Members of this family contain a TIM barrel structure. In the inosine monophosphate dehydrogenases 2 CBS domains Pfam:PF00571 are inserted in the TIM barrel [2]. This family is a membe ...	This family is involved in biosynthesis of guanosine nucleotide. Members of this family contain a TIM barrel structure. In the inosine monophosphate dehydrogenases 2 CBS domains Pfam:PF00571 are inserted in the TIM barrel [2]. This family is a member of the common phosphate binding site TIM barrel family.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	GMP REDUCTASE I	oxidoreductase activity, acting on other nitrogenous compounds as donors, with NAD or NADP as acceptor oxidoreductase activity oxidoreductase activity, acting on other nitrogenous compounds as donors GMP reductase activity catalytic activity cation binding ion binding binding metal ion binding small molecule binding	nucleoside phosphate metabolic process primary metabolic process nucleotide metabolic process purine-containing compound metabolic process nucleobase-containing compound metabolic process purine nucleotide metabolic process organophosphate metabolic process nucleobase-containing small molecule metabolic process phosphate-containing compound metabolic process metabolic process cellular process small molecule metabolic process phosphorus metabolic process response to stimulus nucleoside phosphate metabolic process primary metabolic process nucleotide metabolic process purine-containing compound metabolic process nucleobase-containing compound metabolic process purine nucleotide metabolic process organophosphate metabolic process nucleobase-containing small molecule metabolic process phosphate-containing compound metabolic process metabolic process cellular process small molecule metabolic process phosphorus metabolic process response to stimulus response to stress response to abiotic stimulus response to cold response to temperature stimulus purine nucleobase metabolic process nucleobase metabolic process	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol protein-containing complex GMP reductase complex catalytic complex oxidoreductase complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR050139	Guanosine monophosphate reductase	Family
A	IPR005993	GMP reductase	Family
A	IPR001093	IMP dehydrogenase/GMP reductase	Domain
A	IPR013785	Aldolase-type TIM barrel	Homologous Superfamily
A	IPR015875	IMP dehydrogenase / GMP reductase, conserved site	Conserved Site

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: P36959	juvenile idiopathic arthritis acute myeloid leukemia breast cancer endometriosis large cell medulloblastoma malignant mesothelioma osteosarcoma atrial fibrillation Crohn disease exocrine pancreatic carcinoma Juvenile psoriatic arthritis lung cancer malignant pancreatic neoplasm Pick disease atypical teratoid rhabdoid tumor juvenile idiopathic arthritis acute myeloid leukemia breast cancer endometriosis large cell medulloblastoma malignant mesothelioma osteosarcoma atrial fibrillation Crohn disease exocrine pancreatic carcinoma Juvenile psoriatic arthritis lung cancer malignant pancreatic neoplasm Pick disease atypical teratoid rhabdoid tumor Duchenne muscular dystrophy malignant ependymoma medulloblastoma

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

Chains	Enzyme Name	Description	Catalytic Residues
A	GMP reductase M-CSA #982	Guanosine monophosphate reductase (GMPR) is crucial for catalysis of the irreversible GMP deamination to IMP with the use of NADPH. It converts nucleobase, nucleoside and nucleotide derivatives of G to A nucleotides, and thus maintains the intracellular balance of A and G nucleotides. GMP is a homotetramer with mixed alpha helices and beta sheets.The monomers are stabilised by interactions across their edges and through Cys-Cys bonds. GMPR1 inhibitors are tested for applications is treating Alzheimer's disease and the increase of GMPR expression is linked to suppression of melanoma cancers.	Defined by 3 residues: CYS:A-208 [auth A-186]THR:A-210 [auth A-188]GLU:A-311 [auth A-289] \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 1.7.1.7 (PDB Primary Data) Search M-CSA Motif + EC 1.7.1.7

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.