CATH Classification

Domain Context

CATH Clusters

Superfamily 2.60.200.20
Functional Family Aprataxin and PNKP like factor

Enzyme Information

4.2.99.18
DNA-(apurinic or apyrimidinic site) lyase.
based on mapping to UniProt Q8IW19
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)

Q13426
XRCC4_HUMAN
Homo sapiens
DNA repair protein XRCC4

PDB Structure

PDB 5E50
External Links
Method X-RAY DIFFRACTION
Organism
Primary Citation
Versatility in phospho-dependent molecular recognition of the XRCC1 and XRCC4 DNA-damage scaffolds by aprataxin-family FHA domains.
Cherry, A.L., Nott, T.J., Kelly, G., Rulten, S.L., Caldecott, K.W., Smerdon, S.J.
DNA Repair (Amst.)