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  • 1
    Publication Date: 1990-07-06
    Description: Oligonucleotides equipped with EDTA-Fe can bind specifically to duplex DNA by triple-helix formation and produce double-strand cleavage at binding sites greater than 12 base pairs in size. To demonstrate that oligonucleotide-directed triple-helix formation is a viable chemical approach for the site-specific cleavage of large genomic DNA, an oligonucleotide with EDTA-Fe at the 5' and 3' ends was targeted to a 20-base pair sequence in the 340-kilobase pair chromosome III of Saccharomyces cerevisiae. Double-strand cleavage products of the correct size and location were observed, indicating that the oligonucleotide bound and cleaved the target site among almost 14 megabase pairs of DNA. Because oligonucleotide-directed triple-helix formation has the potential to be a general solution for DNA recognition, this result has implications for physical mapping of chromosomes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Strobel, S A -- Dervan, P B -- GM 42966/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1990 Jul 6;249(4964):73-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Arnold and Mabel Beckman Laboratories of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena 91125.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2195655" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Binding Sites ; Chromosomes, Fungal/*metabolism ; DNA, Fungal/*genetics/metabolism ; Densitometry ; Hydrogen-Ion Concentration ; Molecular Sequence Data ; Nucleic Acid Conformation ; Nucleic Acid Hybridization ; Oligonucleotides/*genetics/metabolism ; Saccharomyces cerevisiae/*genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 1989-08-18
    Description: Oligonucleotides that bind to duplex DNA in a sequence-specific manner by triple helix formation offer an approach to the experimental manipulation of sequence-specific protein binding. Micromolar concentrations of pyrimidine oligodeoxyribonucleotides are shown to block recognition of double helical DNA by prokaryotic modifying enzymes and a eukaryotic transcription factor at a homopurine target site. Inhibition is sequence-specific. Oligonucleotides containing 5-methylcytosine provide substantially more efficient inhibition than oligonucleotides containing cytosine. The results have implications for gene-specific repression by oligonucleotides or their analogs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maher, L J 3rd -- Wold, B -- Dervan, P B -- New York, N.Y. -- Science. 1989 Aug 18;245(4919):725-30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Biology, California Institute of Technology, Pasadena 91125.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2549631" target="_blank"〉PubMed〈/a〉
    Keywords: 5-Methylcytosine ; Animals ; Base Sequence ; Cytosine/analogs & derivatives ; DNA/*metabolism ; DNA Restriction Enzymes ; DNA, Recombinant ; DNA-Binding Proteins/*antagonists & inhibitors/metabolism ; Deoxyribonucleases, Type II Site-Specific/metabolism ; Metallothionein/genetics ; Methylation ; Mice ; Molecular Sequence Data ; Mutation ; Nucleic Acid Conformation ; Oligodeoxyribonucleotides/*pharmacology ; Plasmids ; Promoter Regions, Genetic ; Structure-Activity Relationship ; Transcription Factors/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1990-05-18
    Description: The NH2-terminal locations of a dimer containing the DNA binding domain of the yeast transcriptional activator GCN4 have been mapped on the binding sites 5'-CTGACTAAT-3' and 5'-ATGACTCTT-3'. Affinity cleaving was effected by synthetic GCN4 proteins with Fe.EDTA moieties at the NH2-terminus. Analysis of the DNA cleavage patterns for dimers of the Fe.EDTA-proteins corresponding to GCN4 residues 222 to 281 and 226 to 281 revealed that the NH2-termini were in the major groove nine to ten base pairs apart and were symmetrically displaced four to five base pairs from the central C of the recognition site. This result is consistent with the Y-shaped scissor grip-leucine zipper model recently proposed for a class of DNA binding proteins important in the regulation of gene expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Oakley, M G -- Dervan, P B -- New York, N.Y. -- Science. 1990 May 18;248(4957):847-50.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena 91125.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2111578" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Binding Sites ; DNA/*metabolism ; *DNA-Binding Proteins ; Edetic Acid/metabolism ; Ferric Compounds/metabolism ; Fungal Proteins/*metabolism ; Leucine ; Macromolecular Substances ; Molecular Sequence Data ; Molecular Structure ; *Protein Kinases ; *Saccharomyces cerevisiae Proteins ; Transcription Factors/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1987-10-30
    Description: Homopyrimidine oligodeoxyribonucleotides with EDTA-Fe attached at a single position bind the corresponding homopyrimidine-homopurine tracts within large double-stranded DNA by triple helix formation and cleave at that site. Oligonucleotides with EDTA.Fe at the 5' end cause a sequence specific double strand break. The location and asymmetry of the cleavage pattern reveal that the homopyrimidine-EDTA probes bind in the major groove parallel to the homopurine strand of Watson-Crick double helical DNA. The sequence-specific recognition of double helical DNA by homopyrimidine probes is sensitive to single base mismatches. Homopyrimidine probes equipped with DNA cleaving moieties could be useful tools for mapping chromosomes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moser, H E -- Dervan, P B -- GM 35724/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1987 Oct 30;238(4827):645-50.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena 91125.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3118463" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; *Dna ; Edetic Acid ; Ferrous Compounds ; Humans ; Hydrolysis ; Middle Aged ; Nucleic Acid Conformation ; *Oligodeoxyribonucleotides ; Plasmids ; Solvents
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-09-14
    Description: The preferred binding sites of echinomycin on DNA can be determined by a method called "footprinting." A 32P end-labeled restriction fragment from pBR322 DNA is protected by binding to echinomycin, and cleaved by a synthetic DNA cleaving reagent, methidiumpropyl--EDTA . Fe(II); the DNA cleavage products are then subjected to high-resolution gel analyses. This method reveals that echinomycin has a binding site size of four base pairs. The strong binding sites for echinomycin contain the central two-base-pair sequence 5'-CG-3'. From an analysis of 15 echinomycin sites on 210 base pairs of DNA, key recognition elements for echinomycin are contained in the sequences (5'-3') ACGT and TCGT (A, adenine; C, cytosine; G, guanine; T, thymine).〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Van Dyke, M M -- Dervan, P B -- GM-07616/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1984 Sep 14;225(4667):1122-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6089341" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Binding Sites ; DNA/metabolism ; DNA Restriction Enzymes ; *Echinomycin/metabolism ; Electrophoresis ; Escherichia coli/genetics ; Plasmids ; *Quinoxalines/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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