CATH Classification
| Level | CATH Code | Description |
|---|---|---|
|
3 | Alpha Beta |
|
3.60 | 4-Layer Sandwich |
|
3.60.10 | Deoxyribonuclease I; Chain A |
|
3.60.10.10 | Endonuclease/exonuclease/phosphatase |
Domain Context
CATH Clusters
| Superfamily | Endonuclease/exonuclease/phosphatase |
| Functional Family | DNA-(apurinic or apyrimidinic site) lyase |
Enzyme Information
| 3.1.-.- |
Acting on ester bonds.
based on mapping to UniProt P27695
|
| 4.2.99.18 |
DNA-(apurinic or apyrimidinic site) lyase.
based on mapping to UniProt P27695
The C-O-P bond 3' to the apurinic or apyrimidinic site in DNA is broken by a beta-elimination reaction, leaving a 3'-terminal unsaturated sugar and a product with a terminal 5'-phosphate.
-!- 'Nicking' of the phosphodiester bond is due to a lyase-type reaction, not hydrolysis. -!- This group of enzymes was previously listed as endonucleases, under the number EC 3.1.25.2.
|
UniProtKB Entries (1)
| P27695 |
APEX1_HUMAN
Homo sapiens
DNA-(apurinic or apyrimidinic site) lyase
|
PDB Structure
| PDB | 1BIX |
| External Links | |
| Method | X-RAY DIFFRACTION |
| Organism | Escherichia |
| Primary Citation |
The crystal structure of the human DNA repair endonuclease HAP1 suggests the recognition of extra-helical deoxyribose at DNA abasic sites.
EMBO J.
|