Résumé
Replicative DNA polymerases are blocked at DNA lesions. Synthesis past DNA damage requires the replacement of the replicative polymerase by one of a group of specialised translesion synthesis (TLS) polymerases, most of which belong to the Y-family. Each of these has different substrate specificities for different types of damage. In eukaryotes mono-ubiquitination of PCNA plays a crucial role in the switch from replicative to TLS polymerases at stalled forks. All the Y-family polymerases have ubiquitin binding sites that increase their binding affinity for ubiquitinated PCNA at the sites of stalled forks.
langue originale | Anglais |
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Pages (de - à) | 891-899 |
Nombre de pages | 9 |
journal | DNA Repair |
Volume | 6 |
Numéro de publication | 7 |
Les DOIs | |
état | Publié - 1 juil. 2007 |