| First Author | Pilzecker B | Year | 2016 |
| Journal | Nucleic Acids Res | Volume | 44 |
| Issue | 10 | Pages | 4734-44 |
| PubMed ID | 26926109 | Mgi Jnum | J:242620 |
| Mgi Id | MGI:5905760 | Doi | 10.1093/nar/gkw123 |
| Citation | Pilzecker B, et al. (2016) PrimPol prevents APOBEC/AID family mediated DNA mutagenesis. Nucleic Acids Res 44(10):4734-44 |
| abstractText | PrimPol is a DNA damage tolerant polymerase displaying both translesion synthesis (TLS) and (re)-priming properties. This led us to study the consequences of a PrimPol deficiency in tolerating mutagenic lesions induced by members of the APOBEC/AID family of cytosine deaminases. Interestingly, during somatic hypermutation, PrimPol counteracts the generation of C>G transversions on the leading strand. Independently, mutation analyses in human invasive breast cancer confirmed a pro-mutagenic activity of APOBEC3B and revealed a genome-wide anti-mutagenic activity of PRIMPOL as well as most Y-family TLS polymerases. PRIMPOL especially prevents APOBEC3B targeted cytosine mutations within TpC dinucleotides. As C transversions induced by APOBEC/AID family members depend on the formation of AP-sites, we propose that PrimPol reprimes preferentially downstream of AP-sites on the leading strand, to prohibit error-prone TLS and simultaneously stimulate error-free homology directed repair. These in vivo studies are the first demonstrating a critical anti-mutagenic activity of PrimPol in genome maintenance. |
