B7Q4U2 · B7Q4U2_IXOSC
- ProteinEndonuclease III homolog
- Gene8035927
- StatusUniProtKB unreviewed (TrEMBL)
- Amino acids326 (go to sequence)
- Protein existenceEvidence at protein level
- Annotation score4/5
Function
function
Bifunctional DNA N-glycosylase with associated apurinic/apyrimidinic (AP) lyase function that catalyzes the first step in base excision repair (BER), the primary repair pathway for the repair of oxidative DNA damage. The DNA N-glycosylase activity releases the damaged DNA base from DNA by cleaving the N-glycosidic bond, leaving an AP site. The AP lyase activity cleaves the phosphodiester bond 3' to the AP site by a beta-elimination. Primarily recognizes and repairs oxidative base damage of pyrimidines.
Catalytic activity
- 2'-deoxyribonucleotide-(2'-deoxyribose 5'-phosphate)-2'-deoxyribonucleotide-DNA = a 3'-end 2'-deoxyribonucleotide-(2,3-dehydro-2,3-deoxyribose 5'-phosphate)-DNA + a 5'-end 5'-phospho-2'-deoxyribonucleoside-DNA + H+
Cofactor
Note: Binds 1 [4Fe-4S] cluster. The cluster does not appear to play a role in catalysis, but is probably involved in the proper positioning of the enzyme along the DNA strand.
Features
Showing features for active site, site, binding site.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Active site | 226 | Nucleophile; for N-glycosylase activity | ||||
Sequence: K | ||||||
Site | 245 | Important for catalytic activity | ||||
Sequence: D | ||||||
Binding site | 296 | [4Fe-4S] cluster (UniProtKB | ChEBI) | ||||
Sequence: C | ||||||
Binding site | 303 | [4Fe-4S] cluster (UniProtKB | ChEBI) | ||||
Sequence: C | ||||||
Binding site | 306 | [4Fe-4S] cluster (UniProtKB | ChEBI) | ||||
Sequence: C | ||||||
Binding site | 312 | [4Fe-4S] cluster (UniProtKB | ChEBI) | ||||
Sequence: C |
GO annotations
Aspect | Term | |
---|---|---|
Cellular Component | mitochondrion | |
Cellular Component | nucleus | |
Molecular Function | 4 iron, 4 sulfur cluster binding | |
Molecular Function | class I DNA-(apurinic or apyrimidinic site) endonuclease activity | |
Molecular Function | DNA binding | |
Molecular Function | DNA-(apurinic or apyrimidinic site) endonuclease activity | |
Molecular Function | endonuclease activity | |
Molecular Function | metal ion binding | |
Molecular Function | oxidized pyrimidine nucleobase lesion DNA N-glycosylase activity | |
Biological Process | base-excision repair, AP site formation | |
Biological Process | nucleotide-excision repair |
Keywords
- Molecular function
- Biological process
- Ligand
Enzyme and pathway databases
Names & Taxonomy
Protein names
- Recommended nameEndonuclease III homolog
- EC number
- Alternative names
Gene names
Organism names
- Strains
- Taxonomic lineageEukaryota > Metazoa > Ecdysozoa > Arthropoda > Chelicerata > Arachnida > Acari > Parasitiformes > Ixodida > Ixodoidea > Ixodidae > Ixodinae > Ixodes
Accessions
- Primary accessionB7Q4U2
Proteomes
Organism-specific databases
Subcellular Location
PTM/Processing
Proteomic databases
Interaction
Protein-protein interaction databases
Structure
Family & Domains
Features
Showing features for compositional bias, region, domain.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Compositional bias | 22-40 | Polar residues | ||||
Sequence: DVSAVKTKKKSNQSQANGG | ||||||
Region | 22-67 | Disordered | ||||
Sequence: DVSAVKTKKKSNQSQANGGEDKPRVKEDILEQATSSKKVSQRKARS | ||||||
Domain | 144-294 | HhH-GPD | ||||
Sequence: LSSQTKDEVTHAAVGRLRDFGLTPEVVSAAEEKQLEELIYPVSFYKNKAKHLKRTSQVLLDEYDGDIPDSIEGLCKLPGVGPKMSYLAMSCGWKRTVGIGVDTHVHRISNWLGWLPQATKTPEQTRKALEAWLPRDLWDEVNLLLVGFGQT |
Sequence similarities
Belongs to the Nth/MutY family.
Phylogenomic databases
Family and domain databases
Sequence
- Sequence statusComplete
- Length326
- Mass (Da)36,409
- Last updated2009-02-10 v1
- Checksum37D25A85076552D4
Features
Showing features for compositional bias.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Compositional bias | 22-40 | Polar residues | ||||
Sequence: DVSAVKTKKKSNQSQANGG |
Keywords
- Technical term
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
ABJB010274942 EMBL· GenBank· DDBJ | - | Genomic DNA | No translation available. | |
ABJB010450576 EMBL· GenBank· DDBJ | - | Genomic DNA | No translation available. | |
DS857608 EMBL· GenBank· DDBJ | EEC13864.1 EMBL· GenBank· DDBJ | Genomic DNA |