| Literature DB >> 1609278 |
J L Mergny1, G Duval-Valentin, C H Nguyen, L Perrouault, B Faucon, M Rougée, T Montenay-Garestier, E Bisagni, C Hélène.
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.Entities:
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Year: 1992 PMID: 1609278 DOI: 10.1126/science.256.5064.1681
Source DB: PubMed Journal: Science ISSN: 0036-8075 Impact factor: 47.728