Reference: Szwajczak E, et al. (2017) The CysB motif of Rev3p involved in the formation of the four-subunit DNA polymerase ζ is required for defective-replisome-induced mutagenesis. Mol Microbiol 106(4):659-672

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Abstract


Eukaryotic DNA replication is performed by high-fidelity multi-subunit replicative B-family DNA polymerases (Pols) α, δ and ɛ. Those complexes are composed of catalytic and accessory subunits and organized in multicomplex machinery: the replisome. The fourth B-family member, DNA polymerase zeta (Pol ζ), is responsible for a large portion of mutagenesis in eukaryotic cells. Two forms of Pol ζ have been identified, a hetero-dimeric (Pol ζ2 ) and a hetero-tetrameric (Pol ζ4 ) ones and recent data have demonstrated that Pol ζ4 is responsible for damage-induced mutagenesis. Here, using yeast Pol ζ mutant defective in the assembly of the Pol ζ four-subunit form, we show in vivo that [4Fe-4S] cluster in Pol ζ catalytic subunit (Rev3p) is also required for spontaneous (wild-type cells) and defective-replisome-induced mutagenesis - DRIM (pol3-Y708A, pol2-1 or psf1-100 cells), when cells are not treated with any external damaging agents.

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Journal Article
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Szwajczak E, Fijalkowska IJ, Suski C
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