Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:2.7.7.6 (RNA polymerase)
 34,946 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Two humic-like substances, the oxidative polymer of protocatechuic acid (OP-PCA) and humic acid inhibit the in vitro replication of influenza virus A/WSN/33 (H1N1) in Madin-Darby canine kidney (MDCK) cells at concentrations of no cytotoxicity. The 50% inhibitory concentration (IC50) for OP-PCA was 6.59 +/- 1.02 microg/ml when the compound was added at the stage of viral adsorption. When OP-PCA was added after virus adsorption, the IC50 was 53.27 +/- 8.12 microg/ml. The IC50 for humic acid was 48.61 +/- 7.32 microg/ml and 55.27 +/- 5.46 microg/ml respectively when the compound was added at the stage of viral adsorption or post-adsorption. In spite of structural resemblance of these two compounds, they exhibit different actions of anti-flu. The OP-PCA inhibits virus-induced hemagglutination and low pH-induced cell-cell fusion. Humic acid inhibits the endonuclease activity of viral RNA polymerase. The monomer of PCA shows no inhibition on influenza virus replication.
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PMID:In vitro anti-influenza virus activity of synthetic humate analogues derived from protocatechuic acid. 1189 May 23

Complex investigation of new phenazine-1-carboxylic acid (PCA-1) phenylamides allowed to reveal their ability for substantial growth retardation of three gram-positive bacterial strains--Micrococcus sp., Erysipelothrix rhusiopathiae and Staphylococcus aureus. The strong inhibitory activity of PCA-1 derivatives towards the RNA synthesis in in vitro T7-RNA-polymerase transcription system was also shown, and this property depended on concentration and structure of the tested compounds. The methods of computer modeling outlined the possible mechanism of RNA synthesis inhibition by PCA-1 amides: this process is arisen due to formation of stable complex of substances with enzyme at the position of substrate (rNTP) binding site. The revealed accordance of suppressor PCA-1 amides action in the enzymatic transcription system with antibacterial activity of these agents allows assuming that DNA-dependent RNA polymerase might be one of the cellular targets for tested bacteria. Such an approach permits to propose the use of such in vitro transcription model system to reveal biologically active substances among newly synthesized compounds, having close action mechanism.
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PMID:[New amides of phenazine-1-carboxylic acid: antimicrobial activity and structure-activity relationship]. 1895 39