Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: EC:3.1.26.9 (ribonuclease)
 6,589 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Nuclei purified from chicken embryo fibroblast cells infected with influenza (fowl plague) virus contain an RNA-dependent RNA polymerase. The in vitro activity of this enzyme is insensitive to actinomycin D, and is completely destroyed by preincubation with ribonuclease. Enzyme induction is prevented if cells are treated with actinomycin D or cycloheximide at the time of infection. RNA-dependent RNA polymerase activity increases rapidly in cell nuclei from 1 h postinfection, reaches a maximum at 3 to 4 h, then declines; a similar RNA polymerase activity in the microsomal cell fraction increases from 2 h postinfection and reaches a maximum at 5 to 6 h. The characteristics of the nuclear and microsomal enzymes in vitro are similar with respect to pH and divalent cation requirements. The in vitro products of enzyme activity present in the nuclear and microsomal fractions of cells infected for 3 and 5 h were characterized by sucrose density gradient analysis, and annealing to virion RNA. The microsomal RNA polymerase product contained 67 and 93% RNA complementary to virion RNA at 3 and 5 h, respectively; for the nuclear RNA polymerase product these values were 40% in each case.
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PMID:RNA-dependent RNA polymerase in nuclei of cells infected with influenza virus. 435 67

Bacillus intermedius ribonuclease modified by the residue of adamantane carboxylic acid was prepared. When the cells of chick embryo fibroblasts infected by the fowl plague virus were exposed to the modified ribonuclease, the antiviral activity proved to be higher by comparison to that of the native enzyme. The chemotherapeutic index of the RNAse after the modification increased 4 times.
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PMID:[Preparation and antiviral properties of Bacillus intermedius ribonuclease modified by chloranhydride of adamantanecarboxylic acid]. 865 23