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TargetMol Anti-COVID-19   Date: Wednesday 15 April, 2020

TargetMol Anti-COVID-19 Compound Library

Library Information Compounds
Anti-COVID-19 Compound Library We selected a number of compounds that may be effective against the SARS-CoV-2,including Lopinavir/Ritonavir, Hydroxychloroquine sulfate, Favipiravir, etc. We also will keep updating it in response to the newest research progress. 223
3CLpro-Targeted compound library (CADD) Based on the protein structure of 3CLpro, multiple research papers published identified several drugs having the potential to treat COVID-19 by virtual screening, such as drugs that target PLpro and 3CLpro in other viruses such as HIV drugs, Lopinavir and Ritonavir. 161
ACE2-Targeted compound library (CADD) The prefusion SARS-CoV S1 subunit is structurally organized into four distinct domains: NTD, CTD1, CTD2 and CTD3. Among these, CTD1 is the receptor-binding domain, and one CTD1 in the trimer adopts an “up” conformation as a prerequisite for the binding of SARS-CoV to the cellular receptor angiotensin-converting enzyme 2 (ACE2). Similar observations of a protruding “up” CTD1 have also been reported for MERS-CoV S glycoproteins. Targeting the interaction of S protein RBD and ACE2 is an important therapeutic strategy to block coronavirus from entering host cells. 462
RBD-Targeted compound library (CADD) 206
nsp16-Targeted compound library (CADD) Nsp16 provides the viral mRNA with the ability to camouflage and obscure itself from the host cell by catalyzing methylation on m7GpppA-RNA, thus preventing recognition and activation of the host immune response which is essential for successful viral infection. Saquinavir and Lopinavir, two anti-HIV drugs, can inhibit the activity of NSP16 methyltransferase, thereby suppressing the function and replication of the virus. 281
PLpro-Targeted compound library (CADD) Papain-like proteinase (PLpro), encoded in nsp3, is responsible for the cleavages of N-terminus of the replicase polyprotein to release Nsp1, Nsp2 and Nsp3, which is essential for correcting virus replication and antagonizing the host’s innate immunity. 474
RdRP-Targeted compound library (CADD) RdRp is the core component of virus genome replication system, and has been used as a very important drug target in the research of SARS-CoV and MERS-CoV inhibitors. Remdesivir, an effective anti-SARS-CoV-2, is a nucleotide analog inhibitor of RdRp. 464
X-Domain-Targeted compound library (CADD) X domain is a conserved structure of pp1a and becomes a part of nsp3 after pp1a cleaved by a virally encoded cysteine protease, the papain-like protease (PLpro). It is a catalytically active ADP-ribose-1″-phosphatase thought to play a role during synthesis of viral subgenomic RNAs thus can be used for drug screening or design. 463
Anti-COVID-19 compound library (CADD) In the virtual screening for the above seven targets, we carefully selected products with high scores,these compounds have been widely reported in the literature to have the potential of anti-cancer, anti-bacterial, anti-inflammation, or anti-oxidation activity; or have other potential targets. 362
nsp15-Targeted compound library (CADD) Nsp15 is a nidoviral RNA uridylate-specific endoribonuclease (NendoU) carrying C-terminal catalytic domain belonging to the EndoU family. EndoU enzymes are present in all kingdoms of life, where they play various biological functions associated with RNA processing.  470

Promising Antiviral Agents

Based on the above virtual screening results, and combined with the recent clinical reports, we have also obtained some valuable potential drugs for SARS-CoV-2, which can reduce drug development cycle by using drug relocation strategy.

Compound Information Condition
Darunavir Darunavir is an HIV protease inhibitor that is used in the treatment of AIDS and HIV infections. FDA Approved
Remdesivir Remdesivir is a nucleoside analogue, with effective antiviral activity (EC50 of 74 nM for SARS-CoV and MERS-CoV in HAE cells) Clinical
Camostat mesilate Camostat is a trypsin-like protease inhibitor and inhibits airway epithelial sodium channel (ENaC) function. Approved/Preclinical
Baricitinib Baricitinib is an orally bioavailable inhibitor of Janus kinases 1 and 2 (JAK1/2), with potential anti-inflammatory, immunomodulating and antineoplastic activities. FDA Approved
Favipiravir Favipiravir (T-705), an effective and selective RNA-dependent RNA polymerase inhibitor, are applied to treat influenza virus infections. Approved/Clinical
Ribavirin Ribavirin is a synthetic nucleoside analog of ribofuranose with activity against hepatitis C virus and other RNA viruses. FDA Approved
Chloroquine diphosphate Chloroquine is an aminoquinoline antimalarial and also is widely used as an autophagy inhibitor. Chloroquine also is an inhibitor of toll-like receptors (TLRs). FDA Approved
Nitazoxanide Nitazoxanide is a synthetic benzamide with antiprotozoal activity. Nitazoxanide exerts its antiprotozoal activity by interfering with the pyruvate ferredoxin/flavodoxin oxidoreductase dependent electron transfer reaction. FDA Approved

COVID-19 has now been declared a pandemic and new treatments are urgently needed as we enter a phase beyond containment. Scientists are endeavoring to find antivirals specific to the virus. As an expert in drug screening, TargetMol would like to share the virtual screening results with scientists all of the world in drug discovery to fight against this novel coronavirus.

*All products are for research use only, not for human use.


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