Purine– and pyrimidine–triple-helix-forming oligonucleotides recognize qualitatively different target sites at the ribosomal DNA locus
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چکیده
منابع مشابه
Triple helix-forming oligonucleotides target psoralen adducts to specific chromosomal sequences in human cells.
The ability to target photochemical adducts to specific genomic DNA sequences in cells is useful for studying DNA repair and mutagenesis in intact cells, and also as a potential mode of gene-specific therapy. Triple helix-forming DNA oligonucleotides linked to psoralen (psoTFOs) were designed to deliver UVA-induced psoralen photoadducts to two distinct sequences within the human interstitial co...
متن کاملInhibitory properties of double-helix-forming circular oligonucleotides.
Several circular oligonucleotides were synthesized and characterized by electrospray ionization mass spectrometry. Experiments on termination of primer extension catalysed by DNA polymerases, Klenow fragment and Tth have demonstrated that a double helix forming circular 2'-deoxyribooligomer containing a 25mer sequence complementary to the target single-stranded DNA along with a 34mer random mis...
متن کاملTargeted mutagenesis of DNA using triple helix-forming oligonucleotides linked to psoralen.
Oligonucleotides can bind as third strands of DNA in a sequence-specific manner in the major groove in homopurine/homopyrimidine stretches in duplex DNA. Here we use a 10-base triplex-forming oligonucleotide linked to a psoralen derivative at its 5' end to achieve site-specific, targeted mutagenesis in an intact, double-stranded lambda phage genome. Site-specific triplex formation delivers the ...
متن کاملSecondary binding sites for heavily modified triplex forming oligonucleotides
In order to enhance DNA triple helix stability synthetic oligonucleotides have been developed that bear amino groups on the sugar or base. One of the most effective of these is bis-amino-U (B), which possesses 5-propargylamino and 2'-aminoethoxy modifications. Inclusion of this modified nucleotide not only greatly enhances triplex stability, but also increases the affinity for related sequences...
متن کاملTriple helix formation by purine-rich oligonucleotides targeted to the human dihydrofolate reductase promoter.
The ability of oligodeoxynucleotides to form specific triple helical structures with critical regulatory sequences in the human dihydrofolate reductase (DHFR) promoter was investigated. A battery of purine-rich oligonucleotides targeted to the two purine.pyrimidine strand biased regions near the DHFR transcription initiation site was developed. The stable triple helical structures formed by bin...
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ژورنال
عنوان ژورنال: RNA
سال: 2017
ISSN: 1355-8382,1469-9001
DOI: 10.1261/rna.063800.117