Nucleic acid analogue induced transcription of double...

C - Chemistry – Metallurgy – 12 – P

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C12P 19/34 (2006.01) C12Q 1/68 (2006.01)

Patent

CA 2176746

RNA is transcribed from a double stranded DNA template by forming a complex by hybridising to the template at a desired transcription initiation site one or more oligonucleic acid analogues of the PNA type capable of forming a transcription initiation site with the DNA and exposing the complex to the action of a DNA dependant RNA polymerase in the presence of nucleoside triphosphates. Equal length transcripts may be obtained by placing a block to transcription downstream from the initiation site or by cutting the template at such a selected location The initiation site is formed by displacement of one strand of the DNA locally by the PNA hybridisation.

On transcrit l'ARN à partir d'une matrice d'ADN double-brin en formant un complexe par hybridation avec la matrice, au niveau d'un site d'amorçage de transcription requis, d'un ou plusieurs analogues d'acide oligo-nucléique du type acide nucléique peptidique (PNA) aptes à former un tel site d'amorçage avec l'ADN, et en soumettant le complexe à l'action d'une ARN-polymérase ADN-dépendante en présence de nucléosides triphosphates. L'on obtient des produits de transcription de longueur égale en plaçant un élément d'inhibition de transcription en aval du site d'amorçage, ou en coupant la matrice au niveau d'un tel site. Le site d'amorçage est formé par le déplacement local d'un brin de l'ADN par hybridation du PNA.

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