Oligonucleotides comprising a molecular switch

C - Chemistry – Metallurgy – 12 – Q

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C12Q 1/68 (2006.01) C07H 21/04 (2006.01)

Patent

CA 2524572

This invention relates to oligonucleotides comprising a molecular switch which may exist in an "open" or "closed" position. The molecular switch portion of the probe is particularly sensitive to the identity of sequences complementary to the molecular switch. Oligonucleotides containing a molecular switch are applicable to all kinds of hybridization processes. Due to the sensitivity of the switch domain of the oligonucleotide, probes containing a molecular switch are particularly useful in the identification of single point mismatches. More specifically, a portion, but not all, of the oligonucleotide becomes unbound from a mismatched target. The invention further relates to methods of using said oligonucleotides for research reagents, and clinical diagnostics. An exemplary oligonucleotide comprises a first hybridizable domain, a second bridging block domain, and a third binding domain.

L'invention concerne des oligonucléotides comprenant un système de commutation moléculaire pouvant exister dans une position "ouverte" ou "fermée". La partie de commutation moléculaire de la sonde est particulièrement sensible à l'identité de séquences complémentaires du système de commutation moléculaire. Les oligonucléotides contenant un système de commutation moléculaire sont applicables à tous les types de processus d'hybridation. Du fait de la sensibilité du domaine de commutation de l'oligonucléotide, les sondes contenant un système de commutation moléculaire sont particulièrement utiles dans l'identification de mésappariements ponctuels uniques. Plus particulièrement, une partie, et non la totalité, de l'oligonucléotide devient libérée d'une cible mésappariée. L'invention concerne également des méthodes d'utilisation de ces oligonucléotides pour des réactifs de recherche et des diagnostics cliniques. Par exemple, un oligonucléotide peut comprendre un premier domaine hybridable, un deuxième domaine de pontage et un troisième domaine de liaison.

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