1ORO
A FLEXIBLE LOOP AT THE DIMER INTERFACE IS A PART OF THE ACTIVE SITE OF THE ADJACENT MONOMER OF ESCHERICHIA COLI OROTATE PHOSPHORIBOSYLTRANSFERASE
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 | d1oroa_ | Alpha and beta proteins (a/b) | PRTase-like | PRTase-like | Phosphoribosyltransferases (PRTases) | Orotate PRTase | (Escherichia coli ) [TaxId: 562 ], | SCOPe (2.08) |
B | d1orob_ | Alpha and beta proteins (a/b) | PRTase-like | PRTase-like | Phosphoribosyltransferases (PRTases) | Orotate PRTase | (Escherichia coli ) [TaxId: 562 ], | SCOPe (2.08) |
Domain Annotation: SCOP2 Classification SCOP2 Database Homepage
Chains | Type | Family Name | Domain Identifier | Family Identifier | Provenance Source (Version) |
---|---|---|---|---|---|
A | SCOP2 Family | Phosphoribosyltransferases (PRTases) | 8019860 | 4000253 | SCOP2 (2022-06-29) |
A | SCOP2 Superfamily | PRTase-like | 8032240 | 3000060 | SCOP2 (2022-06-29) |
B | SCOP2B Superfamily | PRTase-like | 8032240 | 3000060 | 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 | PF00156 | e1oroA1 | A: a/b three-layered sandwiches | X: PRTase-like (From Topology) | H: PRTase-like (From Topology) | T: PRTase-like | F: PF00156 | ECOD (1.6) |
B | PF00156 | e1oroB1 | A: a/b three-layered sandwiches | X: PRTase-like (From Topology) | H: PRTase-like (From Topology) | T: PRTase-like | F: PF00156 | ECOD (1.6) |
Domain Annotation: CATH CATH Database Homepage
Chain | Domain | Class | Architecture | Topology | Homology | Provenance Source (Version) |
---|---|---|---|---|---|---|
A | 3.40.50.2020 | Alpha Beta | 3-Layer(aba) Sandwich | Rossmann fold | CATH (4.3.0) | |
B | 3.40.50.2020 | Alpha Beta | 3-Layer(aba) Sandwich | Rossmann fold | CATH (4.3.0) |
Protein Family Annotation Pfam Database Homepage
Chains | Accession | Name | Description | Comments | Source |
---|---|---|---|---|---|
PF00156 | Phosphoribosyl transferase domain (Pribosyltran) | Phosphoribosyl transferase domain | This family includes a range of diverse phosphoribosyl transferase enzymes. This family includes: Adenine phosphoribosyl-transferase EC:2.4.2.7, Swiss:P07672. Hypoxanthine-guanine-xanthine phosphoribosyl-transferase Swiss:P51900. Hypoxanthine phosph ... | Domain |
Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage
InterPro: Protein Family Classification InterPro Database Homepage
Chains | Accession | Name | Type |
---|---|---|---|
IPR000836 | Phosphoribosyltransferase domain | Domain | |
IPR004467 | Orotate phosphoribosyl transferase domain | Domain | |
IPR023031 | Orotate phosphoribosyltransferase | Family | |
IPR029057 | Phosphoribosyltransferase-like | Homologous Superfamily |
Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage
Chains | Enzyme Name | Description | Catalytic Residues |
---|---|---|---|
orotate phosphoribosyltransferase M-CSA #873 | Orotate phosphoribosyltransferase (OPRTase) is involved in the biosynthesis of pyrimidine nucleotides. In the pyrimidine synthesis pathway, OPRT catalyses the reversible phosphoribosyl transfer from 5'-phospho-alpha-D-ribose 1'-diphosphate (PRPP) to orotic acid (OA), forming pyrophosphate and orotidine 5'-monophosphate (OMP). The mechanism of PRTases has been the subject of much debate over the years. However, stereochemical results argue against mechanisms which invoke a covalent enzyme-phosphoribosyl intermediate. Kinetic studies argue against a direct SN2-type displacement. Thus, a two-step, SN1-type mechanisms with oxocarbonium-like transition states or intermediates has been proposed as the most likely mechanism. However, there is still much debate as to the exact roles of the residues involved. | EC: 2.4.2.10 (PDB Primary Data) |