1J79
Molecular Structure of Dihydroorotase: A Paradigm for Catalysis Through the Use of a Binuclear Metal Center
External Resource: Annotation
Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage
Chains | Domain Info | Class | Fold | Superfamily | Family | Domain | Species | Provenance Source (Version) |
---|---|---|---|---|---|---|---|---|
A | d1j79a_ | Alpha and beta proteins (a/b) | TIM beta/alpha-barrel | Metallo-dependent hydrolases | Dihydroorotase | Dihydroorotase | (Escherichia coli ) [TaxId: 562 ], | SCOPe (2.08) |
B | d1j79b_ | Alpha and beta proteins (a/b) | TIM beta/alpha-barrel | Metallo-dependent hydrolases | Dihydroorotase | Dihydroorotase | (Escherichia coli ) [TaxId: 562 ], | SCOPe (2.08) |
Domain Annotation: ECOD Classification ECOD Database Homepage
Chains | Family Name | Domain Identifier | Architecture | Possible Homology | Homology | Topology | Family | Provenance Source (Version) |
---|---|---|---|---|---|---|---|---|
A | PF01979 | e1j79A1 | A: a/b barrels | X: TIM beta/alpha-barrel | H: TIM barrels (From Topology) | T: TIM barrels | F: PF01979 | ECOD (1.6) |
B | PF01979 | e1j79B1 | A: a/b barrels | X: TIM beta/alpha-barrel | H: TIM barrels (From Topology) | T: TIM barrels | F: PF01979 | ECOD (1.6) |
Domain Annotation: CATH CATH Database Homepage
Chain | Domain | Class | Architecture | Topology | Homology | Provenance Source (Version) |
---|---|---|---|---|---|---|
A | 3.20.20.140 | Alpha Beta | Alpha-Beta Barrel | TIM Barrel | Metal-dependent hydrolases | CATH (4.3.0) |
B | 3.20.20.140 | Alpha Beta | Alpha-Beta Barrel | TIM Barrel | Metal-dependent hydrolases | CATH (4.3.0) |
Protein Family Annotation Pfam Database Homepage
Chains | Accession | Name | Description | Comments | Source |
---|---|---|---|---|---|
PF01979 | Amidohydrolase family (Amidohydro_1) | Amidohydrolase family | This family of enzymes are a a large metal dependent hydrolase superfamily [1]. The family includes Adenine deaminase EC:3.5.4.2 that hydrolyses adenine to form hypoxanthine and ammonia. Adenine deaminases reaction is important for adenine utilisatio ... | Domain |
Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage
InterPro: Protein Family Classification InterPro Database Homepage
Chains | Accession | Name | Type |
---|---|---|---|
IPR004721 | Dihydroorotase homodimeric type | Family | |
IPR002195 | Dihydroorotase, conserved site | Conserved Site | |
IPR006680 | Amidohydrolase-related | Domain | |
IPR032466 | Metal-dependent hydrolase | Homologous Superfamily |
Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage
Chains | Enzyme Name | Description | Catalytic Residues |
---|---|---|---|
dihydroorotase M-CSA #630 | Dihyrdoorotase catalyses the reversible interconversion of carbamoyl aspartate and dihydroorotate. This reaction is an essential part of the pathway for the biosynthesis of pyrimidine nucleotides. Sequence comparisons show that there are two general classes of dihydroorotases. Class II enzymes are all monofunctional proteins from Gram-negative bacteria and yeast. Class I enzymes, found in higher organisms, are much larger and typically contain several enzyme activities as exemplified by CAD, a multifunctional enzyme found in mammals, insects and moulds. This protein combines the first three enzymes of the pyrimidine biosynthesis pathway: carbamoyl phosphate synthetase, aspartate carbamoylase, and dihydroorotase. Sequence homology within each class of enzymes is quite high (>40%) while that between the two classes is much lower. Both classes employ the same mechanism involving a binuclear zinc centre. | Defined by 6 residues: HIS:A-16HIS:A-18LYS:A-102HIS:A-139HIS:A-177ASP:A-250 | EC: 3.5.2.3 (PDB Primary Data) |