1T0U
Crystal structure of E.coli uridine phosphorylase at 2.2 A resolution (Type-A Native)
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 | d1t0ua_ | Alpha and beta proteins (a/b) | Phosphorylase/hydrolase-like | Purine and uridine phosphorylases | Purine and uridine phosphorylases | Uridine phosphorylase | (Escherichia coli ) [TaxId: 562 ], | SCOPe (2.08) |
B | d1t0ub_ | Alpha and beta proteins (a/b) | Phosphorylase/hydrolase-like | Purine and uridine phosphorylases | Purine and uridine phosphorylases | Uridine phosphorylase | (Escherichia coli ) [TaxId: 562 ], | SCOPe (2.08) |
Domain Annotation: SCOP2 Classification SCOP2 Database Homepage
Domain Annotation: ECOD Classification ECOD Database Homepage
Chains | Family Name | Domain Identifier | Architecture | Possible Homology | Homology | Topology | Family | Provenance Source (Version) |
---|---|---|---|---|---|---|---|---|
A | PNP_UDP_1 | e1t0uA1 | A: a/b three-layered sandwiches | X: Phosphorylase/hydrolase-like | H: Peptidyl-tRNA hydrolase-like (From Topology) | T: Peptidyl-tRNA hydrolase-like | F: PNP_UDP_1 | ECOD (1.6) |
B | PNP_UDP_1 | e1t0uB1 | A: a/b three-layered sandwiches | X: Phosphorylase/hydrolase-like | H: Peptidyl-tRNA hydrolase-like (From Topology) | T: Peptidyl-tRNA hydrolase-like | F: PNP_UDP_1 | ECOD (1.6) |
Domain Annotation: CATH CATH Database Homepage
Chain | Domain | Class | Architecture | Topology | Homology | Provenance Source (Version) |
---|---|---|---|---|---|---|
A | 3.40.50.1580 | Alpha Beta | 3-Layer(aba) Sandwich | Rossmann fold | Nucleoside phosphorylase domain | CATH (4.3.0) |
B | 3.40.50.1580 | Alpha Beta | 3-Layer(aba) Sandwich | Rossmann fold | Nucleoside phosphorylase domain | CATH (4.3.0) |
Protein Family Annotation Pfam Database Homepage
Chains | Accession | Name | Description | Comments | Source |
---|---|---|---|---|---|
PF01048 | Phosphorylase superfamily (PNP_UDP_1) | Phosphorylase superfamily | Members of this family include: purine nucleoside phosphorylase (PNP) Uridine phosphorylase (UdRPase) 5'-methylthioadenosine phosphorylase (MTA phosphorylase) | Domain |
Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage
InterPro: Protein Family Classification InterPro Database Homepage
Chains | Accession | Name | Type |
---|---|---|---|
IPR035994 | Nucleoside phosphorylase superfamily | Homologous Superfamily | |
IPR010058 | Uridine phosphorylase | Family | |
IPR018016 | Nucleoside phosphorylase, conserved site | Conserved Site | |
IPR000845 | Nucleoside phosphorylase domain | Domain |
Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage
Chains | Enzyme Name | Description | Catalytic Residues |
---|---|---|---|
uridine phosphorylase M-CSA #787 | The enzyme uridine phosphorylase is very important in the pathway whereby uracil can be scavenged to increase blood uracil levels. The overall reaction thus results in the formation of ribose-1-phosphate in addition to uracil. The pathway is of particular interest because it provides a mechanism whereby the effect of base analogues such as 5BU can be minimised, thus may provide some defence against tumour formation. The enzyme itself shows significant homology to Purine nucleotide phosphorylases rather than to pyrimidine nucleotide phosphorylases, posing interesting questions about its evolution. | Defined by 4 residues: HIS:A-8GLU:A-80ARG:A-168ARG:B-223 EC: 2.4.2.3 (PDB Primary Data) |