| Predicate | Object |
|---|---|
| rdf:type | |
| biopax3:comment |
The single-nucleotide replacement pathway of base excision repair appears to facilitate the repair of most damaged bases. Following DNA glycosylase mediated cleavage of the damaged base, the endonuclease, APE1 is recruited to the site of damage where it cleaves the 5' side of the base-free deoxyribose residue. DNA polymerase, POL Beta then displaces the DNA glycosylase and cleaves the 3' side of the sugar phosphate. APE1 is subsequently released, the XRCC1:LIG3 complex is recruited and POL Beta mediates the synthesis of the replacement residue. Following LIG3 ligase mediated ligation of the replaced residue, the XRCC1:LIG3 complex dissociates (see Lindahl and Wood, 1999). An alternative BER pathway is employed when the structure of the terminal sugar phosphate is such that it can not be cleaved through the AP lyase activity of POL Beta.
|
| biopax3:xref | |
| biopax3:evidenceCode |