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1.
ChemMedChem ; 16(2): 340-354, 2021 01 19.
Article in English | MEDLINE | ID: covidwho-1044678

ABSTRACT

Inhibition of coronavirus (CoV)-encoded papain-like cysteine proteases (PLpro ) represents an attractive strategy to treat infections by these important human pathogens. Herein we report on structure-activity relationships (SAR) of the noncovalent active-site directed inhibitor (R)-5-amino-2-methyl-N-(1-(naphthalen-1-yl)ethyl) benzamide (2 b), which is known to bind into the S3 and S4 pockets of the SARS-CoV PLpro . Moreover, we report the discovery of isoindolines as a new class of potent PLpro inhibitors. The studies also provide a deeper understanding of the binding modes of this inhibitor class. Importantly, the inhibitors were also confirmed to inhibit SARS-CoV-2 replication in cell culture suggesting that, due to the high structural similarities of the target proteases, inhibitors identified against SARS-CoV PLpro are valuable starting points for the development of new pan-coronaviral inhibitors.


Subject(s)
Antiviral Agents/pharmacology , Benzamides/pharmacology , Coronavirus 3C Proteases/metabolism , Cysteine Proteinase Inhibitors/pharmacology , Isoindoles/pharmacology , SARS-CoV-2/drug effects , Animals , Antiviral Agents/chemical synthesis , Antiviral Agents/metabolism , Benzamides/chemical synthesis , Benzamides/metabolism , Catalytic Domain , Chlorocebus aethiops , Coronavirus 3C Proteases/chemistry , Crystallography, X-Ray , Cysteine Proteinase Inhibitors/chemical synthesis , Cysteine Proteinase Inhibitors/metabolism , Isoindoles/chemical synthesis , Isoindoles/metabolism , Molecular Docking Simulation , Molecular Structure , Protein Binding , Structure-Activity Relationship , Vero Cells , Virus Replication/drug effects
2.
ChemMedChem ; 16(2): 340-354, 2021 01 19.
Article in English | MEDLINE | ID: covidwho-878190

ABSTRACT

Inhibition of coronavirus (CoV)-encoded papain-like cysteine proteases (PLpro ) represents an attractive strategy to treat infections by these important human pathogens. Herein we report on structure-activity relationships (SAR) of the noncovalent active-site directed inhibitor (R)-5-amino-2-methyl-N-(1-(naphthalen-1-yl)ethyl) benzamide (2 b), which is known to bind into the S3 and S4 pockets of the SARS-CoV PLpro . Moreover, we report the discovery of isoindolines as a new class of potent PLpro inhibitors. The studies also provide a deeper understanding of the binding modes of this inhibitor class. Importantly, the inhibitors were also confirmed to inhibit SARS-CoV-2 replication in cell culture suggesting that, due to the high structural similarities of the target proteases, inhibitors identified against SARS-CoV PLpro are valuable starting points for the development of new pan-coronaviral inhibitors.


Subject(s)
Antiviral Agents/pharmacology , Benzamides/pharmacology , Coronavirus 3C Proteases/metabolism , Cysteine Proteinase Inhibitors/pharmacology , Isoindoles/pharmacology , SARS-CoV-2/drug effects , Animals , Antiviral Agents/chemical synthesis , Antiviral Agents/metabolism , Benzamides/chemical synthesis , Benzamides/metabolism , Catalytic Domain , Chlorocebus aethiops , Coronavirus 3C Proteases/chemistry , Crystallography, X-Ray , Cysteine Proteinase Inhibitors/chemical synthesis , Cysteine Proteinase Inhibitors/metabolism , Isoindoles/chemical synthesis , Isoindoles/metabolism , Molecular Docking Simulation , Molecular Structure , Protein Binding , Structure-Activity Relationship , Vero Cells , Virus Replication/drug effects
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