Abstract
A triple helix is formed upon binding of an oligodeoxynucleotide to the major groove of duplex DNA. A benzo[e]pyridoindole derivative (BePI) strongly stabilized this structure and showed preferential binding to a triplex rather than to a duplex. Energy transfer experiments suggest that BePI intercalates within the triple helix. Sequence-specific inhibition of transcription initiation of a specific gene by Escherichia coli RNA polymerase by a triplex-forming oligodeoxynucleotide is strongly enhanced when the triplex is stabilized by BePI. Upon irradiation with ultraviolet light, BePI induces covalent modifications of the target within the triple helix structure.
| Original language | English |
|---|---|
| Pages (from-to) | 1681-1684 |
| Number of pages | 4 |
| Journal | Science |
| Volume | 256 |
| Issue number | 5064 |
| DOIs | |
| Publication status | Published - 1 Jan 1992 |
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