Cysteine Protease

Inhibitory Selectivity

Cysteine Protease Products

Catalog No. Information Product Use Citations Product Validations
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-64

E-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

PMSF

PMSF 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%.

S7394New

MDL-28170

MDL-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.

S0722New

Cruzain-IN-1

Cruzain-IN-1 is a selective inhibitor of trypanosomal cysteine proteases and a covalent and reversible Cruzain inhibitor with IC50 of 10 nM.

S0194New

Balicatib

Balicatib (AAE-581) is a potent and selective inhibitor of the osteoclastic enzyme cathepsin K.

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.

S2847

Cathepsin Inhibitor 1

Cathepsin 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.

S7396

Calpeptin

Calpeptin 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.

S7386

MG-101 (ALLN)

MG-101 (ALLN, Calpain inhibitor-1) is a cell-permeable and potent inhibitor of cysteine proteases including calpains and lysosomal cathepsins.

S7391

Z-FA-FMK

Z-FA-FMK is an irreversible cysteine protease inhibitor, and also inhibits effector caspases.

S7380

Leupeptin Hemisulfate

Leupeptin 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.

S7424

PD 151746

PD 151746 is a selective, cell-permeable calpain inhibitor with Ki of 0.26 μM for μ-Calpain, about 20-fold selectivity over m-calpain.

S7381

Pepstatin A

Pepstatin 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-Pyrimidine

2-cyano-Pyrimidine is a cathepsin K inhibitor with an IC50 of 170 nM.

S3012

Pazopanib

Pazopanib (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.

Catalog No. Information Product Use Citations Product Validations
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-64

E-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

PMSF

PMSF 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%.

S7394New

MDL-28170

MDL-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.

S0722New

Cruzain-IN-1

Cruzain-IN-1 is a selective inhibitor of trypanosomal cysteine proteases and a covalent and reversible Cruzain inhibitor with IC50 of 10 nM.

S0194New

Balicatib

Balicatib (AAE-581) is a potent and selective inhibitor of the osteoclastic enzyme cathepsin K.

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.

S2847

Cathepsin Inhibitor 1

Cathepsin 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.

S7396

Calpeptin

Calpeptin 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.

S7386

MG-101 (ALLN)

MG-101 (ALLN, Calpain inhibitor-1) is a cell-permeable and potent inhibitor of cysteine proteases including calpains and lysosomal cathepsins.

S7391

Z-FA-FMK

Z-FA-FMK is an irreversible cysteine protease inhibitor, and also inhibits effector caspases.

S7380

Leupeptin Hemisulfate

Leupeptin 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.

S7424

PD 151746

PD 151746 is a selective, cell-permeable calpain inhibitor with Ki of 0.26 μM for μ-Calpain, about 20-fold selectivity over m-calpain.

S7381

Pepstatin A

Pepstatin 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-Pyrimidine

2-cyano-Pyrimidine is a cathepsin K inhibitor with an IC50 of 170 nM.

Catalog No. Information Product Use Citations Product Validations
S3012

Pazopanib

Pazopanib (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.