Base Changes and Triple-Helix Hybridization Properties of Gt Containing 3rd Strands – a Systematic Study

Clarenc, J. P.; Lebleu, B.; Leonetti, J. P.

Nucleosides & Nucleotides

1994 / vol 13 / pages 799-809


Triple-helix recognition of the DNA major grove offers a powerful approach for the design of sequence specific DNA binding molecules. Although the triple-helix binding of pyrimidine containing third strands is well characterized now, the factors governing the recognition of double stranded DNA by GT containing third strands are poorly understood. Oligonucleotides with a variable amount of G and GpT or TpG steps have been synthesized here. A systematical study was performed to determine the influence of these changes on the triple-helix hybridization properties of these oligonucleotides. Large difference in the hybridization properties have been observed by band shift experiments.



binding; DNA; motif; oligonucleotides; pairs; ph; range; recognition

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