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. 1983 Dec;156(3):1275–1281. doi: 10.1128/jb.156.3.1275-1281.1983

Effect of pKM101 on cell killing and specificity of mutation induction by cis-diaminedichloroplatinum(II) in Escherichia coli K-12.

J Brouwer, M R Adhin, P van de Putte
PMCID: PMC217978  PMID: 6358195

Abstract

Cell killing and mutation induction in the lacI gene of Escherichia coli by cis-Pt(NH3)2Cl2 were studied in cells with different repair capacities, with and without pKM101. The presence of the plasmid pKM101 made repair-proficient cells more susceptible to killing by cis-Pt(NH3)2Cl2 and strongly enhanced mutation induction by that compound. Both effects were shown to be dependent upon excision repair. Characterization of the induced mutations in the lacI gene after cis-Pt(NH3)2Cl2 treatment of E. coli cells, by the LacI system, revealed that the mutagenic specificity of the Pt compound was strongly influenced by the presence of the pKM101 plasmid. With pKM101, 23% of the induced amber and ochre mutations resulted from substitutions at AT base pairs, whereas these mutations were hardly induced in cells without pKM101. These results suggest that pKM101-induced repair differs from normal SOS repair.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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