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Antiviral Res. 2020 Mar 23:104777. doi: 10.1016/j.antiviral.2020.104777. [Epub ahead of print]
Amide-containing α-hydroxytropolones as inhibitors of hepatitis B virus replication.
Li Q1, Lomonosova E2, Donlin MJ3, Cao F4, O'Dea A5, Milleson B1, Berkowitz AJ6, Baucom JC7, Stasiak JP8, Schiavone DV9, Abdelmessih RG10, Lyubimova A11, Fraboni AJ12, Bejcek LP13, Villa JA14, Gallicchio E15, Murelli RP16, Tavis JE17.
Author information
1
Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, 1100 S. Grand Blvd, Saint Louis, MO, 63104, USA.
2
Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, 1100 S. Grand Blvd, Saint Louis, MO, 63104, USA. Electronic address: [email protected].
3
Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, 1100 S. Grand Blvd, Saint Louis, MO, 63104, USA. Electronic address: [email protected].
4
John Cochran Division, Department of Veterans Affairs Medical Center, Saint Louis, MO, USA. Electronic address: [email protected].
5
Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, 1100 S. Grand Blvd, Saint Louis, MO, 63104, USA. Electronic address: [email protected].
6
Department of Chemistry, Brooklyn College, The City University of New York, Brooklyn, NY, 11210, USA; Program in Chemistry, The Graduate Center of The City University of New York, New York, NY, 11210, USA. Electronic address: [email protected].
7
Department of Chemistry, Brooklyn College, The City University of New York, Brooklyn, NY, 11210, USA; Program in Chemistry, The Graduate Center of The City University of New York, New York, NY, 11210, USA. Electronic address: [email protected].
8
Department of Chemistry, Brooklyn College, The City University of New York, Brooklyn, NY, 11210, USA. Electronic address: [email protected].
9
Department of Chemistry, Brooklyn College, The City University of New York, Brooklyn, NY, 11210, USA; Program in Chemistry, The Graduate Center of The City University of New York, New York, NY, 11210, USA. Electronic address: [email protected].
10
Department of Chemistry, Brooklyn College, The City University of New York, Brooklyn, NY, 11210, USA. Electronic address: [email protected].
11
Department of Chemistry, Brooklyn College, The City University of New York, Brooklyn, NY, 11210, USA. Electronic address: [email protected].
12
Department of Chemistry, Brooklyn College, The City University of New York, Brooklyn, NY, 11210, USA. Electronic address: [email protected].
13
Department of Chemistry, Brooklyn College, The City University of New York, Brooklyn, NY, 11210, USA; Program in Chemistry, The Graduate Center of The City University of New York, New York, NY, 11210, USA. Electronic address: [email protected].
14
Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, 1100 S. Grand Blvd, Saint Louis, MO, 63104, USA. Electronic address: [email protected].
15
Department of Chemistry, Brooklyn College, The City University of New York, Brooklyn, NY, 11210, USA; Program in Chemistry, The Graduate Center of The City University of New York, New York, NY, 11210, USA; Program in Biochemistry, The Graduate Center of The City University of New York, New York, NY, 11210, USA. Electronic address: [email protected].
16
Department of Chemistry, Brooklyn College, The City University of New York, Brooklyn, NY, 11210, USA; Program in Chemistry, The Graduate Center of The City University of New York, New York, NY, 11210, USA; Program in Biochemistry, The Graduate Center of The City University of New York, New York, NY, 11210, USA. Electronic address: [email protected].
17
Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, 1100 S. Grand Blvd, Saint Louis, MO, 63104, USA. Electronic address: [email protected].
Abstract
The Hepatitis B Virus (HBV) ribonuclease H (RNaseH) is a promising but unexploited drug target. Here, we synthesized and analyzed a library of 57 amide-containing α-hydroxytropolones (αHTs) as potential leads for HBV drug development. Fifty percent effective concentrations ranged from 0.31 to 54 μM, with selectivity indexes in cell culture of up to 80. Activity against the HBV RNaseH was confirmed in semi-quantitative enzymatic assays with recombinant HBV RNaseH. The compounds were overall poorly active against human ribonuclease H1, with 50% inhibitory concentrations of 5.1 to >1,000 μM. The αHTs had modest activity against growth of the fungal pathogen Cryptococcus neoformans, but had very limited activity against growth of the Gram - bacterium Escherichia coli and the Gram + bacterium Staphylococcus aureus, indicating substantial selectivity for HBV. A molecular model of the HBV RNaseH templated against the Ty3 RNaseH was generated. Docking the compounds to the RNaseH revealed the anticipated binding pose with the divalent cation coordinating motif on the compounds chelating the two Mn++ ions modeled into the active site. These studies reveal that that amide αHTs can be strong, specific HBV inhibitors that merit further assessment toward becoming anti-HBV drugs.
Copyright © 2020. Published by Elsevier B.V.
KEYWORDS:
Hepatitis B Virus; Molecular modeling; Ribonuclease H; α-Hydroxytropolones
PMID:
32217151
DOI:
10.1016/j.antiviral.2020.104777
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