D3E0X5 · D3E0X5_METRM
- ProteindITP/XTP pyrophosphatase
- StatusUniProtKB unreviewed (TrEMBL)
- Amino acids185 (go to sequence)
- Protein existenceInferred from homology
- Annotation score4/5
Function
function
Pyrophosphatase that catalyzes the hydrolysis of nucleoside triphosphates to their monophosphate derivatives, with a high preference for the non-canonical purine nucleotides XTP (xanthosine triphosphate), dITP (deoxyinosine triphosphate) and ITP. Seems to function as a house-cleaning enzyme that removes non-canonical purine nucleotides from the nucleotide pool, thus preventing their incorporation into DNA/RNA and avoiding chromosomal lesions.
Catalytic activity
- ITP + H2O = IMP + diphosphate + H+
Cofactor
Note: Binds 1 Mg2+ ion per subunit.
Features
Showing features for binding site, active site.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Binding site | 6-11 | substrate | |||
Binding site | 35 | Mg2+ (UniProtKB | ChEBI) | |||
Active site | 63 | Proton acceptor | |||
Binding site | 63 | Mg2+ (UniProtKB | ChEBI) | |||
Binding site | 64 | substrate | |||
Binding site | 139-142 | substrate | |||
Binding site | 162 | substrate | |||
Binding site | 167-168 | substrate | |||
GO annotations
Aspect | Term | |
---|---|---|
Cellular Component | cytoplasm | |
Molecular Function | dITP diphosphatase activity | |
Molecular Function | ITP diphosphatase activity | |
Molecular Function | metal ion binding | |
Molecular Function | nucleotide binding | |
Molecular Function | ribonucleoside triphosphate phosphatase activity | |
Molecular Function | XTP diphosphatase activity | |
Biological Process | nucleotide metabolic process | |
Biological Process | purine nucleoside triphosphate catabolic process |
Keywords
- Molecular function
- Biological process
- Ligand
Enzyme and pathway databases
Names & Taxonomy
Protein names
- Recommended namedITP/XTP pyrophosphatase
- EC number
- Alternative names
Gene names
Organism names
- Strain
- Taxonomic lineageArchaea > Euryarchaeota > Methanomada group > Methanobacteria > Methanobacteriales > Methanobacteriaceae > Methanobrevibacter
Accessions
- Primary accessionD3E0X5
Proteomes
Subcellular Location
UniProt Annotation
GO Annotation
Interaction
Structure
Sequence
- Sequence statusComplete
- Length185
- Mass (Da)21,012
- Last updated2010-03-23 v1
- ChecksumE32553500944A023
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
CP001719 EMBL· GenBank· DDBJ | ADC47949.1 EMBL· GenBank· DDBJ | Genomic DNA |