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5690983
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In global genome nucleotide excision repair (GG-NER), as wel...
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In global genome nucleotide excision repair (GG-NER), as well as transcription-coupled nucleotide excision repair (TC-NER), the cleavage of the damaged DNA strand 3' to the site of damage is carried out by a DNA endonuclease XPG (ERCC5). While the DNA repair synthesis may be initiated prior to the 3' incision (Staresincic et al. 2009), the components of the incision complex probably dissociate from the NER site shortly after the replicative complex assembly and 3' incision (Overmeer et al. 2011). The exception is the RPA heterotrimer, which is a constituent of the DNA synthesis complex, and also coats the undamaged DNA strand, thereby protecting it from endonucleolytic cleavage.