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The use of oligonucleotide probes containing 2'-deoxy-2'-fluoronucleosides for regiospecific cleavage of RNA by RNase H from Escherichia coli. 1992

S Schmidt, and A Niemann, and N F Krynetskaya, and T S Oretskaya, and V G Metelev, and V V Suchomlinov, and Z A Shabarova, and D Cech
Humboldt University, Institute of Bioorganic Chemistry, Berlin, Germany.

Protected 2'-deoxy-2'-fluorouridine and 2'-deoxy-2'-fluorocytidine suitable for incorporation into oligonucleotides via the phosphoramidite approach have been prepared. Five modified and two unmodified oligonucleotides have been synthesized to investigate the regiospecific cleavage of a 5S RNA from Escherichia coli by RNase H. In order to show whether the modified oligonucleotides are able to hybridize with the RNA the physico-chemical properties (melting curves, CD spectra) of analogous DNA/oligodeoxyribonucleotide duplexes have been examined. The modified oligonucleotides are shown to form stable duplexes with a DNA-matrix which exist in an A-like form. Two of the modified probes containing four 2'-deoxy-2'-fluorocytidines or two 2'-deoxy-2'-fluorouridines direct the splitting by RNase H of only one phosphodiester bond of the RNA.

UI MeSH Term Description Entries
D008969 Molecular Sequence Data Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories. Sequence Data, Molecular,Molecular Sequencing Data,Data, Molecular Sequence,Data, Molecular Sequencing,Sequencing Data, Molecular
D009690 Nucleic Acid Conformation The spatial arrangement of the atoms of a nucleic acid or polynucleotide that results in its characteristic 3-dimensional shape. DNA Conformation,RNA Conformation,Conformation, DNA,Conformation, Nucleic Acid,Conformation, RNA,Conformations, DNA,Conformations, Nucleic Acid,Conformations, RNA,DNA Conformations,Nucleic Acid Conformations,RNA Conformations
D003841 Deoxycytidine A nucleoside component of DNA composed of CYTOSINE and DEOXYRIBOSE. Cytosine Deoxyribonucleoside,Cytosine Deoxyriboside,Deoxyribonucleoside, Cytosine,Deoxyriboside, Cytosine
D004926 Escherichia coli A species of gram-negative, facultatively anaerobic, rod-shaped bacteria (GRAM-NEGATIVE FACULTATIVELY ANAEROBIC RODS) commonly found in the lower part of the intestine of warm-blooded animals. It is usually nonpathogenic, but some strains are known to produce DIARRHEA and pyogenic infections. Pathogenic strains (virotypes) are classified by their specific pathogenic mechanisms such as toxins (ENTEROTOXIGENIC ESCHERICHIA COLI), etc. Alkalescens-Dispar Group,Bacillus coli,Bacterium coli,Bacterium coli commune,Diffusely Adherent Escherichia coli,E coli,EAggEC,Enteroaggregative Escherichia coli,Enterococcus coli,Diffusely Adherent E. coli,Enteroaggregative E. coli,Enteroinvasive E. coli,Enteroinvasive Escherichia coli
D005467 Floxuridine An antineoplastic antimetabolite that is metabolized to fluorouracil when administered by rapid injection; when administered by slow, continuous, intra-arterial infusion, it is converted to floxuridine monophosphate. It has been used to treat hepatic metastases of gastrointestinal adenocarcinomas and for palliation in malignant neoplasms of the liver and gastrointestinal tract. FUdR,Fluorodeoxyuridine,5-FUdR,5-Fluorodeoxyuridine,5 Fluorodeoxyuridine
D001483 Base Sequence The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence. DNA Sequence,Nucleotide Sequence,RNA Sequence,DNA Sequences,Base Sequences,Nucleotide Sequences,RNA Sequences,Sequence, Base,Sequence, DNA,Sequence, Nucleotide,Sequence, RNA,Sequences, Base,Sequences, DNA,Sequences, Nucleotide,Sequences, RNA
D012329 RNA, Bacterial Ribonucleic acid in bacteria having regulatory and catalytic roles as well as involvement in protein synthesis. Bacterial RNA
D012341 RNA, Ribosomal, 5S Constituent of the 50S subunit of prokaryotic ribosomes containing about 120 nucleotides and 34 proteins. It is also a constituent of the 60S subunit of eukaryotic ribosomes. 5S rRNA is involved in initiation of polypeptide synthesis. 5S Ribosomal RNA,5S rRNA,RNA, 5S Ribosomal,Ribosomal RNA, 5S,rRNA, 5S
D012360 RNA, Transfer, Phe A transfer RNA which is specific for carrying phenylalanine to sites on the ribosomes in preparation for protein synthesis. Phenylalanine-Specific tRNA,Transfer RNA, Phe,tRNAPhe,tRNA(Phe),Phe Transfer RNA,Phenylalanine Specific tRNA,RNA, Phe Transfer,tRNA, Phenylalanine-Specific
D015345 Oligonucleotide Probes Synthetic or natural oligonucleotides used in hybridization studies in order to identify and study specific nucleic acid fragments, e.g., DNA segments near or within a specific gene locus or gene. The probe hybridizes with a specific mRNA, if present. Conventional techniques used for testing for the hybridization product include dot blot assays, Southern blot assays, and DNA:RNA hybrid-specific antibody tests. Conventional labels for the probe include the radioisotope labels 32P and 125I and the chemical label biotin. Oligodeoxyribonucleotide Probes,Oligonucleotide Probe,Oligoribonucleotide Probes,Probe, Oligonucleotide,Probes, Oligodeoxyribonucleotide,Probes, Oligonucleotide,Probes, Oligoribonucleotide

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