CATH Classification
| Level | CATH Code | Description |
|---|---|---|
|
3 | Alpha Beta |
|
3.40 | 3-Layer(aba) Sandwich |
|
3.40.91 | Restriction Endonuclease |
|
3.40.91.30 |
Domain Context
CATH Clusters
| Superfamily | 3.40.91.30 |
| Functional Family |
Enzyme Information
| 3.1.21.2 |
Deoxyribonuclease IV.
based on mapping to UniProt P00641
Endonucleolytic cleavage to 5'-phosphooligonucleotide end-products.
-!- The enzyme is an apurinic/apyrimidinic (AP) site endonuclease that primes DNA repair synthesis at AP sites. -!- It specifically cleaves the DNA backbone at AP sites and also removes 3' DNA-blocking groups such as 3' phosphates, 3' phosphoglycolates, and 3' alpha,beta-unsaturated aldehydes that arise from oxidative base damage and the activity of combined glycosylase/lyase enzymes. -!- It is also the only known repair enzyme that is able to cleave the DNA backbone 5' of the oxidative lesion alpha-deoxyadenosine. -!- The enzyme has a strong preference for single-stranded DNA. -!- Formerly EC 3.1.4.30.
|
UniProtKB Entries (1)
| P00641 |
ENDO_BPT7
Enterobacteria phage T7
Endonuclease I
|
PDB Structure
| PDB | 1FZR |
| External Links | |
| Method | X-RAY DIFFRACTION |
| Organism | Escherichia |
| Primary Citation |
Crystal structure of the Holliday junction resolving enzyme T7 endonuclease I.
Nat.Struct.Biol.
|