Triple helices and processes for making same
First Claim
1. A triple helix comprising a double-helical nucleic acid having more than 500 nucleotide base pairs and comprising first and second strands and a heteropolymeric oligonucleotide bound to a target sequence within said double-helical nucleic acid, wherein when said oligonucleotide is bound in a parallel orientation to said first strand, said oligonucleotide comprises a T or a C+ bound to an A or a G respectively, on said first strand.
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Abstract
Oligonucleotides and processes for their use for specific recognition of a target sequence in double-stranded nucleic acid through the formation of a triple helix. The oligonucleotides can bind in a parallel or antiparallel orientation to one of the strands of the target sequence depending upon the sequence composition of the target sequence and oligonucleotide used. The oligonucleotides are used as diagnostic or therapeutic agents through incorporation of an appropriate moiety in one or more nucleotides in the triple helix forming oligonucleotide.
76 Citations
35 Claims
- 1. A triple helix comprising a double-helical nucleic acid having more than 500 nucleotide base pairs and comprising first and second strands and a heteropolymeric oligonucleotide bound to a target sequence within said double-helical nucleic acid, wherein when said oligonucleotide is bound in a parallel orientation to said first strand, said oligonucleotide comprises a T or a C+ bound to an A or a G respectively, on said first strand.
- 20. A process for forming a triple helix wherein a heteropolymeric oligonucleotide is bound to a target sequence within a double-helical nucleic acid having more than 500 nucleotide base pairs and comprising first and second strands, comprising contacting said double-helical nucleic acid with a heteropolymeric oligonucleotide capable of binding to a target sequence contained within said double-helical nucleic acid, wherein when said oligonucleotide is bound in a parallel orientation to said first strand, said oligonucleotide comprises a T or a C+ bound to an A or a G respectively, on said first strand.
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35. A process for forming a triple-helix comprising contacting a triple-helical nucleic acid having more than 500 nucleotide base pairs with an oligonucleotide comprising a nebularine-containing nucleotide which is capable of binding to a target sequence contained within said double-helical nucleic acid.
Specification