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- W1565127133 abstract "Seventy-five years after the discovery of transformation with Streptococcus pneumoniae, it is remarkable how little we know of the proteins that interact with incoming single strands in the early processing of transforming DNA. In this work, we used as donor DNA in transformation a radioactively labelled homologous fragment to examine the fate of the single-stranded (ssDNA) products of uptake in cells mutant for DprA or RecA, two proteins essential for transformation. Fifteen minutes after uptake, the labelling of specific chromosomal restriction fragments that demonstrated homologous integration in the wild type was not detected in dprA or recA cells, indicating that in the mutants incoming ssDNA could not be processed into recombinants. Investigation of the fate of donor label 1 min after uptake revealed that incoming ssDNA was immediately degraded in the absence of DprA or RecA. Our results demonstrate that incoming ssDNA requires active protection prior to the RecA-driven search for homology and that both DprA and RecA are needed for this protection." @default.
- W1565127133 created "2016-06-24" @default.
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- W1565127133 date "2003-08-27" @default.
- W1565127133 modified "2023-10-13" @default.
- W1565127133 title "Transformation of Streptococcus pneumoniae relies on DprA- and RecA-dependent protection of incoming DNA single strands" @default.
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- W1565127133 doi "https://doi.org/10.1046/j.1365-2958.2003.03702.x" @default.
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