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  • Title: Sites of termination of in vitro DNA synthesis on cis-diamminedichloroplatinum(II) treated single-stranded DNA: a comparison between E. coli DNA polymerase I and eucaryotic DNA polymerases alpha.
    Author: Villani G, Hübscher U, Butour JL.
    Journal: Nucleic Acids Res; 1988 May 25; 16(10):4407-18. PubMed ID: 3132699.
    Abstract:
    We have compared the capacity of the large fragment of E. coli DNA polymerase I and highly purified DNA polymerases alpha from either Drosophila melanogaster embryos or calf thymus to replicate single-stranded M13 mp10 DNA treated with the antitumoral drug cis-diamminedichloroplatinum(II) (cis-DDP). We report that: a) although prokaryotic and eukaryotic enzymes have different structural complexity and dissimilar in vivo functions, their synthesis was blocked in vitro at similar sites on cis-DDP treated DNA; b) this inhibition occurred not only at d(G)n sequences, as previously reported for E. coli DNA polymerase I, (Pinto & Lippard (1985) Proc. Natl. Acad. Sci. USA, 82, 4616-4619) but also at other sequences which may represent putative cis-DDP-DNA adducts.
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