Cysteine Protease
Inhibitory Selectivity
Isoform-specific Inhibitors
Cysteine Protease Products
| Catalog No. | Information | Product Use Citations | Product Validations |
|---|---|---|---|
| S1013 |
Bortezomib (PS-341)Bortezomib (PS-341, Velcade, LDP-341, MLM341, NSC 681239) is a potent 20S proteasome inhibitor with Ki of 0.6 nM. It exhibits favorable selectivity towards tumor cells over normal cells. Bortezomib (PS-341) inhibits NF-κB and induces ERK phosphorylation to suppress cathepsin B and inhibit the catalytic process of autophagy in ovarian cancer and other solid tumors. |
Effect of different proteasome inhibitors on dysferlin expression and on membrane resealing in cultured primary myoblasts. Primary myoblasts from patient 2 harboring a homozygous Arg555Trp DYSF mutation that were treated with the indicated amounts of bortezomib for 24 hours. Western blots of protein extracts were stained with anti-dysferlin antibodies and with anti–a-tubulin antibody as loading control.
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| S1115 |
Odanacatib (MK-0822)Odanacatib (MK 0822) is a potent, selective, and neutral inhibitor of cathepsin K (human/rabbit) with IC50 of 0.2 nM/1 nM, and demonstrated high selectivity versus off-target cathepsin B, L, S. Phase 3. |
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| S7379 |
E-64E-64 is an irreversible and selective cysteine protease inhibitor, and also inhibits papain, calpain, and cathepsins B and H, but not serine proteases or aspartic proteases. The IC50 for papain is 9 nM. E-64 induces oxidative stress and apoptosis in Filarial Parasite. |
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| S3025 |
PMSFPMSF (Phenylmethylsulfonyl Fluoride, Benzylsulfonyl fluoride) is an irreversible serine/cysteine protease inhibitor. |
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| S7393 |
Aloxistatin (E64d)Aloxistatin (E64d) is an irreversible and membrane-permeable cysteine protease inhibitor with blood platelet aggregation inhibiting activity. The cysteine protease cathepsin L is required for SARS-CoV-2 viral entry, and aloxistatin treatment reduced cellular entry of SARS-CoV-2 pseudovirions by 92.3%. |
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| S0722 |
Cruzain-IN-1Cruzain-IN-1 is a selective inhibitor of trypanosomal cysteine proteases and a covalent and reversible Cruzain inhibitor with IC50 of 10 nM. |
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| S7420 |
CA-074 methyl ester (CA-074 Me)CA-074 methyl ester (CA-074 Me, Cathepsin B Inhibitor IV) is a membrane-permeable derivative of CA-074 and acts as an irreversible cathepsin B inhibitor. |
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| S2847 |
Cathepsin Inhibitor 1Cathepsin Inhibitor 1 is an inhibitor of Cathepsin (L, L2, S, K, B) with pIC50 of 7.9, 6.7, 6.0, 5.5 and 5.2, respectively. |
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| S4591 |
NitroxolineNitroxoline (8-Hydroxy-5-nitroquinoline, 5-nitroquinolin-8-ol, 5-Nitro-8-quinolinol, 5-Nitro-8-hydroxyquinoline) is a urinary antibacterial agent active against susceptible gram-positive and gram-negative organisms commonly found in urinary tract infections. Nitroxoline impairs tumor progression in vitro and in vivo by inhibiting cathepsin B activity. |
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| S7396 |
CalpeptinCalpeptin is a potent, cell-permeable calpain inhibitor with ID50 of 52 nM, 34 nM, 138 nM, and 40 nM for Calpain I (porcine erythrocytes), Calpain II (porcine kidney), Papainb, and Calpain I (human platelets), respectively. Calpeptin attenuates apoptosis and intracellular inflammatory changes in muscle cells. |
Western blotting detection of focal adhesion kinase (FAK) expression and its cleaved fragments with different treatments. DTX represents docetaxel, CPP represents calpeptin (a calpain inhibitor). The experiments were carried out 3 times, obtaining essentially similar results.
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| S7394 |
MDL-28170MDL-28170 (Calpain Inhibitor III) is a potent and selective calpain inhibitor of calpain that penetrates the blood-brain barrier and inhibits brain cysteine protease activity after systemic administration. MDL-28170 is also an inhibitor of γ-secretase. |
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| S7386 |
MG-101 (ALLN)MG-101 (ALLN, Calpain inhibitor-1, Ac-LLnL-CHO) is a cell-permeable and potent inhibitor of cysteine proteases including calpains and lysosomal cathepsins. |
Proteins from different subcellular compartments were efficiently separated without relevant cross-contamination: tight junction-protein claudin-5 (→ plasma membrane) was almost exclusively isolated together with proteins from membranes and organelles, and actin was only present in the fraction containing cytoskeleton proteins. Stronger signals in the lanes with samples from cells treated with the inhibitor MG-101 are due to the general inhibition of intracellular protein degradation.
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| S7391 |
Z-FA-FMKZ-FA-FMK ((1S)-Z-FA-FMK) is an irreversible cysteine protease inhibitor, and also inhibits effector caspases. |
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| S7380 |
Leupeptin HemisulfateLeupeptin Hemisulfate is a reversible inhibitor of serine and cysteine proteases. It inhibits cathepsin B (Ki = 6 nM), calpain (Ki = 10 nM), trypsin (Ki = 35 nM), plasmin (Ki = 3.4 μM), and kallikrein (Ki = 19 μM), and has no effect against chymotrypsin, elastase, renin, or pepsin. |
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| S7392 |
Loxistatin Acid (E-64C)Loxistatin Acid (E-64C, NSC 694279, EP 475), a derivative of E-64, is an irreversible and membrane-permeant cysteine protease inhibitor. The cysteine protease cathepsin L is required for SARS-CoV-2 viral entry. |
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| S3692 |
N-Ethylmaleimide (NEM)N-Ethylmaleimide (NEM) is an organic compound that is derived from maleic acid. It is an irreversible inhibitor of all cysteine peptidases, with alkylation occurring at the active site thiol group. N-Ethylmaleimide (NEM) inactivates endogenous deubiquitinating enzymes (DUBs). N-Ethylmaleimide (NEM) specifically inhibits phosphate transport in mitochondria. |
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| S0194 |
BalicatibBalicatib (AAE-581) is a potent and selective inhibitor of the osteoclastic enzyme cathepsin K. |
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| S7424 |
PD 151746PD 151746 is a selective, cell-permeable calpain inhibitor with Ki of 0.26 μM for μ-Calpain, about 20-fold selectivity over m-calpain. |
(A) Quantification of mS100a7a15 mRNA expression of skin from normal and imiquimod-induced psoriatic mouse backs at 5 days. (B) Immunoblot of mS100a7a15, IL-1α and calpain-1 in skin extracts from normal and imiquimod-induced psoriatic mouse backs. (C) HE staining and immunohistochemical analysis of mS100a7a15, calpain-1 in skin tissues as described in fig 4A. The scale bars represent 100 μm. All data are representative of three independent experiments with n = 6 and are means ± SEM. P values were determined by two-tailed t test. *** P<0.001.
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| S7381 |
Pepstatin APepstatin A (Pepstatin) is a potent aspartic protease inhibitor, and also inhibits HIV replication. Pepstatin A is also an inhibitor of cathepsins D and cathepsins E. Pepstatin A inhibits autophagy by suppressing lysosomal proteases. |
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| S5611 |
2-cyano-Pyrimidine2-cyano-Pyrimidine is a cathepsin K inhibitor with an IC50 of 170 nM. |
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| S3012 |
PazopanibPazopanib (GW786034) is a novel multi-target inhibitor of VEGFR1, VEGFR2, VEGFR3, PDGFR, FGFR, c-Kit and c-Fms/CSF1R with IC50 of 10 nM, 30 nM, 47 nM, 84 nM, 74 nM, 140 nM and 146 nM in cell-free assays, respectively. Pazopanib induces cathepsin B activation and autophagy. |
Three RCC cell lines treated with different concentrations of TKI and HDIL-2 and incubated for 48 h. Microscopic images show apoptotic materials 48 h following treatment (arrows show the apoptotic materials in the pazopanib-treated cells).
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| Catalog No. | Information | Product Use Citations | Product Validations |
|---|---|---|---|
| S1013 |
Bortezomib (PS-341)Bortezomib (PS-341, Velcade, LDP-341, MLM341, NSC 681239) is a potent 20S proteasome inhibitor with Ki of 0.6 nM. It exhibits favorable selectivity towards tumor cells over normal cells. Bortezomib (PS-341) inhibits NF-κB and induces ERK phosphorylation to suppress cathepsin B and inhibit the catalytic process of autophagy in ovarian cancer and other solid tumors. |
Effect of different proteasome inhibitors on dysferlin expression and on membrane resealing in cultured primary myoblasts. Primary myoblasts from patient 2 harboring a homozygous Arg555Trp DYSF mutation that were treated with the indicated amounts of bortezomib for 24 hours. Western blots of protein extracts were stained with anti-dysferlin antibodies and with anti–a-tubulin antibody as loading control.
|
|
| S1115 |
Odanacatib (MK-0822)Odanacatib (MK 0822) is a potent, selective, and neutral inhibitor of cathepsin K (human/rabbit) with IC50 of 0.2 nM/1 nM, and demonstrated high selectivity versus off-target cathepsin B, L, S. Phase 3. |
|
|
| S7379 |
E-64E-64 is an irreversible and selective cysteine protease inhibitor, and also inhibits papain, calpain, and cathepsins B and H, but not serine proteases or aspartic proteases. The IC50 for papain is 9 nM. E-64 induces oxidative stress and apoptosis in Filarial Parasite. |
||
| S3025 |
PMSFPMSF (Phenylmethylsulfonyl Fluoride, Benzylsulfonyl fluoride) is an irreversible serine/cysteine protease inhibitor. |
||
| S7393 |
Aloxistatin (E64d)Aloxistatin (E64d) is an irreversible and membrane-permeable cysteine protease inhibitor with blood platelet aggregation inhibiting activity. The cysteine protease cathepsin L is required for SARS-CoV-2 viral entry, and aloxistatin treatment reduced cellular entry of SARS-CoV-2 pseudovirions by 92.3%. |
||
| S0722 |
Cruzain-IN-1Cruzain-IN-1 is a selective inhibitor of trypanosomal cysteine proteases and a covalent and reversible Cruzain inhibitor with IC50 of 10 nM. |
||
| S7420 |
CA-074 methyl ester (CA-074 Me)CA-074 methyl ester (CA-074 Me, Cathepsin B Inhibitor IV) is a membrane-permeable derivative of CA-074 and acts as an irreversible cathepsin B inhibitor. |
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| S2847 |
Cathepsin Inhibitor 1Cathepsin Inhibitor 1 is an inhibitor of Cathepsin (L, L2, S, K, B) with pIC50 of 7.9, 6.7, 6.0, 5.5 and 5.2, respectively. |
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| S4591 |
NitroxolineNitroxoline (8-Hydroxy-5-nitroquinoline, 5-nitroquinolin-8-ol, 5-Nitro-8-quinolinol, 5-Nitro-8-hydroxyquinoline) is a urinary antibacterial agent active against susceptible gram-positive and gram-negative organisms commonly found in urinary tract infections. Nitroxoline impairs tumor progression in vitro and in vivo by inhibiting cathepsin B activity. |
||
| S7396 |
CalpeptinCalpeptin is a potent, cell-permeable calpain inhibitor with ID50 of 52 nM, 34 nM, 138 nM, and 40 nM for Calpain I (porcine erythrocytes), Calpain II (porcine kidney), Papainb, and Calpain I (human platelets), respectively. Calpeptin attenuates apoptosis and intracellular inflammatory changes in muscle cells. |
Western blotting detection of focal adhesion kinase (FAK) expression and its cleaved fragments with different treatments. DTX represents docetaxel, CPP represents calpeptin (a calpain inhibitor). The experiments were carried out 3 times, obtaining essentially similar results.
|
|
| S7394 |
MDL-28170MDL-28170 (Calpain Inhibitor III) is a potent and selective calpain inhibitor of calpain that penetrates the blood-brain barrier and inhibits brain cysteine protease activity after systemic administration. MDL-28170 is also an inhibitor of γ-secretase. |
||
| S7386 |
MG-101 (ALLN)MG-101 (ALLN, Calpain inhibitor-1, Ac-LLnL-CHO) is a cell-permeable and potent inhibitor of cysteine proteases including calpains and lysosomal cathepsins. |
Proteins from different subcellular compartments were efficiently separated without relevant cross-contamination: tight junction-protein claudin-5 (→ plasma membrane) was almost exclusively isolated together with proteins from membranes and organelles, and actin was only present in the fraction containing cytoskeleton proteins. Stronger signals in the lanes with samples from cells treated with the inhibitor MG-101 are due to the general inhibition of intracellular protein degradation.
|
|
| S7391 |
Z-FA-FMKZ-FA-FMK ((1S)-Z-FA-FMK) is an irreversible cysteine protease inhibitor, and also inhibits effector caspases. |
||
| S7380 |
Leupeptin HemisulfateLeupeptin Hemisulfate is a reversible inhibitor of serine and cysteine proteases. It inhibits cathepsin B (Ki = 6 nM), calpain (Ki = 10 nM), trypsin (Ki = 35 nM), plasmin (Ki = 3.4 μM), and kallikrein (Ki = 19 μM), and has no effect against chymotrypsin, elastase, renin, or pepsin. |
||
| S7392 |
Loxistatin Acid (E-64C)Loxistatin Acid (E-64C, NSC 694279, EP 475), a derivative of E-64, is an irreversible and membrane-permeant cysteine protease inhibitor. The cysteine protease cathepsin L is required for SARS-CoV-2 viral entry. |
||
| S3692 |
N-Ethylmaleimide (NEM)N-Ethylmaleimide (NEM) is an organic compound that is derived from maleic acid. It is an irreversible inhibitor of all cysteine peptidases, with alkylation occurring at the active site thiol group. N-Ethylmaleimide (NEM) inactivates endogenous deubiquitinating enzymes (DUBs). N-Ethylmaleimide (NEM) specifically inhibits phosphate transport in mitochondria. |
||
| S0194 |
BalicatibBalicatib (AAE-581) is a potent and selective inhibitor of the osteoclastic enzyme cathepsin K. |
||
| S7424 |
PD 151746PD 151746 is a selective, cell-permeable calpain inhibitor with Ki of 0.26 μM for μ-Calpain, about 20-fold selectivity over m-calpain. |
(A) Quantification of mS100a7a15 mRNA expression of skin from normal and imiquimod-induced psoriatic mouse backs at 5 days. (B) Immunoblot of mS100a7a15, IL-1α and calpain-1 in skin extracts from normal and imiquimod-induced psoriatic mouse backs. (C) HE staining and immunohistochemical analysis of mS100a7a15, calpain-1 in skin tissues as described in fig 4A. The scale bars represent 100 μm. All data are representative of three independent experiments with n = 6 and are means ± SEM. P values were determined by two-tailed t test. *** P<0.001.
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| S7381 |
Pepstatin APepstatin A (Pepstatin) is a potent aspartic protease inhibitor, and also inhibits HIV replication. Pepstatin A is also an inhibitor of cathepsins D and cathepsins E. Pepstatin A inhibits autophagy by suppressing lysosomal proteases. |
||
| S5611 |
2-cyano-Pyrimidine2-cyano-Pyrimidine is a cathepsin K inhibitor with an IC50 of 170 nM. |
| Catalog No. | Information | Product Use Citations | Product Validations |
|---|---|---|---|
| S3012 |
PazopanibPazopanib (GW786034) is a novel multi-target inhibitor of VEGFR1, VEGFR2, VEGFR3, PDGFR, FGFR, c-Kit and c-Fms/CSF1R with IC50 of 10 nM, 30 nM, 47 nM, 84 nM, 74 nM, 140 nM and 146 nM in cell-free assays, respectively. Pazopanib induces cathepsin B activation and autophagy. |
Three RCC cell lines treated with different concentrations of TKI and HDIL-2 and incubated for 48 h. Microscopic images show apoptotic materials 48 h following treatment (arrows show the apoptotic materials in the pazopanib-treated cells).
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