2. Disease Areas
  3. Infection
  4. Coronavirus Infection
  5. 3-Chymotrypsin-Like Protease

3-Chymotrypsin-Like Protease

3-Chymotrypsin-like protease (3CLpro) is a critical enzyme in the SARS-CoV-2 life cycle, responsible for cleaving the viral polyprotein into 11 essential non-structural proteins required for replication. As a conserved cysteine protease with a highly similar structure across human coronaviruses, 3CLpro is a prime target for antiviral drug development. Inhibitors that bind tightly to its active site—either covalently or non-covalently—can block polyprotein processing and halt viral replication. Strategies to identify inhibitors include targeting the catalytic site with peptide-like and small molecule compounds, as well as exploring allosteric sites to develop non-competitive inhibitors.

3-Chymotrypsin-Like Protease (16):

Cat. No. Product Name CAS No. Purity Chemical Structure
  • HY-B0961
    Merbromin 129-16-8
    Merbromin is a mixed inhibitor of the 3-chymotrypsin-like protease (3CLpro) of SARS-CoV-2, with an IC50 of 2.7 μM. Merbromin effectively inhibits the replication of the Zika virus (ZIKV) and shows anti-ZIKV activity by inhibiting ZIKVpro. Merbromin can also be used as a topical disinfectant for cuts and scrapes, and it serves as a biological dye.
    Merbromin
  • HY-161177
    PROTAC SARS-CoV-2 3CLPro degrader 2 98.59%
    PROTAC KRAS G12D degrader 2 is a peptidomimetic PROTAC specifically targeting the dimeric SARS-CoV-2 3CLPro protein. PROTAC KRAS G12D degrader 2 inhibits SARS-CoV-2 3CLPro with an IC50 of 21.2 μM. PROTAC KRAS G12D degrader 2 specifically binds to the active site of SARS-CoV-2 3CLPro. PROTAC KRAS G12D degrader 2 reduces protein levels of SARS-CoV-2 3CLPro without affecting cell viability. PROTAC KRAS G12D degrader 2 can be used for the study of viral infections in Coronavirus genera.
    PROTAC SARS-CoV-2 3CLPro degrader 2
  • HY-175029
    ALG-097558 2892287-29-3
    ALG-097558 is an orally active 3CLpro inhibitor. ALG-097558 demonstrates pan-coronavirus activity against various SARS-CoV-2 variants as well as other human coronaviruses (HCoVs) such as SARS-CoV-1, α-HCoV 229E, and β-HCoV OC43. ALG-097558 demonstrates potent inhibition with IC50s of 2 nM (SARS-CoV-2 3CLpro) and 6 nM (229E 3CLpro). ALG-097558 demonstrates antiviral activity in the SARS-CoV-2 hamster infection model. ALG-097558 can be used for the study of viral infections[1].
    ALG-097558
  • HY-N0063R
    Punicalagin (Standard) 65995-63-3
    Punicalagin (Standard) is the analytical standard of Punicalagin. This product is intended for research and analytical applications. Punicalagin is a polyphenol ingredient isolated from Pomegranate (Punica granatum L.) or the leaves of Terminalia catappa L.. Punicalagin is a reversible and non-competitive 3CLpro inhibitor and inhibits SARS-CoV-2 replication in vitro. Punicalagin is an anti-hepatitis B virus (HBV) agent and has antioxidant, anti-inflammatory, and anticancer effects. Punicalagin has the potential for the research of COVID-19.
    Punicalagin (Standard)
  • HY-17367AR
    Atazanavir sulfate (Standard) 229975-97-7
    Atazanavir (sulfate) (Standard) is the analytical standard of Atazanavir (sulfate). This product is intended for research and analytical applications. Atazanavir (BMS-232632) sulfate, a highly selective HIV-1 protease inhibitor, is the first protease inhibitor approved for once-daily administration. Atazanavir sulfate is a substrate and inhibitor of CYP3A4, and an inhibitor and inducer of P-glycoprotein (P-gp). Atazanavir sulfate is also a SARS-CoV 3CLpro inhibitor with an IC50 of 3.49 μM.
    Atazanavir sulfate (Standard)
  • HY-N15365
    Antcin B 163597-25-9
    Antcin B is a SARS-CoV-2 3-chymotrypsin-like protease (3CL Pro) inhibitor. Antcin B binds to multiple key amino acid residues of 3CL Pro(such as Leu141, Asn142, Glu166, His163, etc.) through hydrogen bonds, salt bridges, and hydrophobic interactions, thereby inhibiting the activity of 3CL Pro, blocking the cleavage process of viral polyproteins, and suppressing the replication of the SARS-CoV-2 virus in host cells. Antcin B is promising for research of COVID-19.
    Antcin B
  • HY-W399297R
    Isodeoxycholic acid (Standard) 566-17-6
    Isodeoxycholic acid (7α,12α-Dihydroxycholanoic acid) Standard is the analytical standard of Isodeoxycholic acid (HY-W399297). This product is intended for research and analytical applications. Isodeoxycholic acid (7α,12α-Dihydroxycholanoic acid) is a 3β-hydroxylated secondary bile acid. Isodeoxycholic acid is produced by epimerization of deoxycholic acid by intestinal bacteria. Isodeoxycholic acid is detectable in feces, mainly existing as saponifiable conjugates with long-chain fatty acids. Isodeoxycholic acid participates in the regulation of intestinal physiology.
    Isodeoxycholic acid (Standard)
  • HY-17430R
    Amprenavir (Standard) 161814-49-9
    Amprenavir (Standard) is the analytical standard of Amprenavir. This product is intended for research and analytical applications. Amprenavir (VX-478) is a HIV protease inhibitor (Ki=0.6 nM) used to treat HIV infection. Amprenavir is also a SARS-CoV 3CLpro inhibitor with an IC50 of 1.09 μM.
    Amprenavir (Standard)
  • HY-10235R
    Telaprevir (Standard) 402957-28-2
    Telaprevir (Standard) is the analytical standard of Telaprevir. This product is intended for research and analytical applications. Telaprevir (VX-950) is a highly selective, reversible, and potent peptidomimetic inhibitor of the HCV NS3-4A protease, the steady-state inhibitory constant (Ki) of Telaprevir is 7 nM against a genotype 1 (H strain) NS3 protease domain plus a NS4A cofactor peptide. Telaprevir inhibits SARS-CoV-2 3CLpro activity.
    Telaprevir (Standard)
  • HY-90001S1
    Ritonavir-13C,d3 2937755-89-8
    Ritonavir-13C,d3 is the 13C- and deuterium labeled Ritonavir. Ritonavir (ABT 538) is an inhibitor of HIV protease used to treat HIV infection and AIDS. Ritonavir is also a SARS-CoV 3CLpro inhibitor with an IC50 of 1.61 μM.
    Ritonavir-<sup>13</sup>C,d<sub>3</sub>
  • HY-177910
    Anticoronavirus agent-1 75445-60-2
    Anticoronavirus agent-1 (Compound IV-2) is a 1,4-naphthone compound and is a 3CL hydrolase inhibitor (3C-like proteinase) of the 19-nCoV novel coronavirus. Anticoronavirus agent-1 has low cytotoxity on HSF cells. Anticoronavirus agent-1 can be used for the study of the novel coronavirus.
    Anticoronavirus agent-1
  • HY-17634R
    Glecaprevir (Standard) 1365970-03-1
    Glecaprevir (Standard) is the analytical standard of Glecaprevir. This product is intended for research and analytical applications. Glecaprevir is a novel HCV NS3/4A protease inhibitor, with IC50 values ranging from 3.5 to 11.3 nM. Glecaprevir is also a SARS-CoV 3CLpro inhibitor with an IC50 of 4.09 μM.
    Glecaprevir (Standard)
  • HY-14434R
    Asunaprevir (Standard) 630420-16-5
    Asunaprevir (Standard) is the analytical standard of Asunaprevir. This product is intended for research and analytical applications. Asunaprevir (BMS-650032) is a potent and orally bioavailable hepatitis C virus (HCV) NS3 protease inhibitor, with IC50 of 0.2 nM-3.5 nM. Asunaprevir inhibits SARS-CoV-2 3CLpro activity.
    Asunaprevir (Standard)
  • HY-12594R
    Paritaprevir (Standard) 1216941-48-8
    Paritaprevir (Standard) is the analytical standard of Paritaprevir. This product is intended for research and analytical applications. Paritaprevir (ABT-450) is a potent, orally active and antiviral non-structural protein 3/4A (NS3/4A) protease inhibitor with EC50s of 1 and 0.21 nM against HCV 1a and 1b, respectively. Paritaprevir is also a SARS-CoV 3CLpro inhibitor with an IC50 of 1.31 μM. Paritaprevir is metabolized primarily by cytochrome P450 (CYP) 3A. The plasma concentration and half-life of Paritaprevir can be enhanced by Ritonavir (a CYP450 inhibitor).
    Paritaprevir (Standard)
  • HY-10300R
    Narlaprevir (Standard) 865466-24-6
    Narlaprevir (Standard) is the analytical standard of Narlaprevir. This product is intended for research and analytical applications. Narlaprevir (SCH 900518) is a selective and orally bioavailable NS3 protease inhibitor with a Ki value of 6 nM and an EC90 value of 40 nM. Narlaprevir also inhibits the HCV nonstructural protein 3 serine protease. Narlaprevir is also a SARS-CoV 3CLpro inhibitor with an IC50 of 2.3 μM.
    Narlaprevir (Standard)
  • HY-D0837R
    Imidazole (Standard) 288-32-4
    Imidazole (Standard) is the analytical standard of Imidazole. This product is intended for research and analytical applications. Imidazole (Glyoxaline; 1,3-Diaza-2,4-cyclopentadiene) is a heterocyclic aromatic compound. Imidazole bearing molecules have been used as corrosion, acetylcholinesterase (AChEI) and xanthine oxidase (XO) inhibitors, performing biological activities such as antifungal, antituberculosis, anti-inflammatory, antioxidant, and analgesic, amongst many others. Imidazole inhibits the enzymatic conversion of the endoperoxides (PGG2 and PGH2) to thromboxane A2 by platelet microsomes. Imidazole derivatives exhibits inhibition on SARS-CoV-2 3CLPro enzyme, which is promising for research in the field of Alzheimer’s disease, gout, COVID-19 and thrombo-embolic disease.
    Imidazole (Standard)