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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Structural deviations at CpG provide a plausible explanation for the high frequency of mutation at this site. Phosphorus nuclear magnetic resonance and circular dichroism studies.

CpG sites in DNA are hotspots for mutations leading to human genetic disorders. However, the structural basis for these events were still unclear and necessitated a deeper evaluation. Our experiments with phosphorus-31 nuclear magnetic resonance, ultraviolet-melting and circular dichroism on two related CpG-containing octanucleotide duplexes show that CpG is a malleable step whose conformation and thermal stability are strongly dependent on the nature of its flanking steps. We conclude that the CpG step may exert a deleterious structural influence on the helix very much like the mismatch containing steps. This peculiar property of CpG should constitute a molecular basis for its recognition by various ligands as well as for mutations affecting CpG and hence an explanation for its rarity in vertebrate genomes.[1]

References

  1. Structural deviations at CpG provide a plausible explanation for the high frequency of mutation at this site. Phosphorus nuclear magnetic resonance and circular dichroism studies. el Antri, S., Mauffret, O., Monnot, M., Lescot, E., Convert, O., Fermandjian, S. J. Mol. Biol. (1993) [Pubmed]
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