Proteasome

Inhibitory Selectivity

Isoform-specific Inhibitors

Proteasome Products

Catalog No. Information Product Use Citations Product Validations
S2619

MG132

MG132 ((S,R,S)-(-)-MG132, Z-Leu-D-Leu-Leu-al) is a potent proteasome (ChTL, TL, and PGPH) inhibitor. MG132 also inhibits calpain (IC50=1.2 μM).

S7172

ONX-0914 (PR-957)

ONX-0914 (PR-957) is a potent and selective immunoproteasome inhibitor with minimal cross-reactivity for the constitutive proteasome in a cell-free assay.

S7038

Epoxomicin (BU-4061T)

Epoxomicin (BU-4061T, Aids010837) is a selective proteasome inhibitor with anti-inflammatory activity, inhibits primarily the CH-L activity of the 20S proteasome, while T-L and PGPH catalytic activities are also inhibited at 100- and 1000-fold reduced rate. Epoxomicin promotes apoptosis.

S8279

Shikonin (C.I. 75535)

Shikonin (C.I. 75535, Anchusin, Anchusa acid, Alkanna Red, Isoarnebin 4, NSC 252844), a potent and specific Pyruvate kinase M2 (PKM2) inhibitor, is a major component of zicao (purple gromwell, the dried root of Lithospermum erythrorhizon), a Chinese herbal medicine with various biological activities. It is also an inhibitor of TMEM16A chloride channel activity using cell-based fluorescent-quenching assay. Shikonin exerts an anti-inflammatory effect by inhibiting tumor necrosis factor-α (TNF-α) and prevents activation of nuclear factor-κB (NF-κB) pathway via proteasome inhibition.

S4432

Ixazomib Citrate (MLN9708)

Ixazomib citrate (MLN9708, Ninlaro) is a prodrug of Ixazomib (MLN2238), which is a selective, orally bioavailable inhibitor of 20S proteasome that inhibits the chymotrypsin-like proteolytic (β5) site with IC50 of 3.4 nM and Ki of 0.93 nM, respectively. Ixazomib (MLN2238) also inhibits caspase-like (β1) and trypsin-like (β2) proteolytic sites with IC50 of 31 nM and 3500 nM, respectively.

S7933

VR23

VR23 is a potent proteasome inhibitor with IC50 of 1 nM, 50-100 nM, and 3 μM for trypsin-like proteasomes, chymotrypsin-like proteasomes, and caspase-like proteasomes, respectively.

S5813

Isoginkgetin

Isoginkgetin is a naturally derived biflavonoid with anti-tumor activity. Isoginkgetin directly inhibits the chymotrypsin-like, trypsin-like, and caspase-like activities of the 20S proteasome. Isoginkgetin also is a general inhibitor of Pre-mRNA splicing.

S7504

Salinosporamide A (NPI-0052)

Salinosporamide A (NPI-0052, ML858, Marizomib, MRZ) is a novel marine derived proteasome inhibitor which inhibits CT-L β5, C-L β1, and T-L β2 proteasome activities in human erythrocyte-derived 20S proteasomes with IC50 of 3.5 nM, 430 nM, 28 nM.

S6851

RA-190

RA190, a bis-benzylidine piperidon, is a potent, selective and oral effective inhibitor of proteasome ubiquitin receptor RPN13/ADRM1 with anticancer activity. RA190 triggers ER stress response, p53/p21 signaling axis and autophagy in multiple myeloma cells.

S7462

PI-1840

PI-1840 is a reversible and selective chymotrypsin-like (CT-L) inhibitor with IC50 of 27 nM with little effects on the other two major proteasome proteolytic activities, trypsin-like (T-L) and postglutamyl-peptide-hydrolysis-like (PGPH-L).

S3269

Acetylcorynoline

Acetylcorynoline, a major alkaloid component derived from Corydalis bungeana which is a traditional Chinese medical herb, shows anti-inflammatory properties. Acetylcorynoline may decrease egl-1 expression to suppress apoptosis pathways and increase rpn5 expression to enhance the activity of proteasomes.

Catalog No. Information Product Use Citations Product Validations
S2619

MG132

MG132 ((S,R,S)-(-)-MG132, Z-Leu-D-Leu-Leu-al) is a potent proteasome (ChTL, TL, and PGPH) inhibitor. MG132 also inhibits calpain (IC50=1.2 μM).

S7172

ONX-0914 (PR-957)

ONX-0914 (PR-957) is a potent and selective immunoproteasome inhibitor with minimal cross-reactivity for the constitutive proteasome in a cell-free assay.

S7038

Epoxomicin (BU-4061T)

Epoxomicin (BU-4061T, Aids010837) is a selective proteasome inhibitor with anti-inflammatory activity, inhibits primarily the CH-L activity of the 20S proteasome, while T-L and PGPH catalytic activities are also inhibited at 100- and 1000-fold reduced rate. Epoxomicin promotes apoptosis.

S8279

Shikonin (C.I. 75535)

Shikonin (C.I. 75535, Anchusin, Anchusa acid, Alkanna Red, Isoarnebin 4, NSC 252844), a potent and specific Pyruvate kinase M2 (PKM2) inhibitor, is a major component of zicao (purple gromwell, the dried root of Lithospermum erythrorhizon), a Chinese herbal medicine with various biological activities. It is also an inhibitor of TMEM16A chloride channel activity using cell-based fluorescent-quenching assay. Shikonin exerts an anti-inflammatory effect by inhibiting tumor necrosis factor-α (TNF-α) and prevents activation of nuclear factor-κB (NF-κB) pathway via proteasome inhibition.

S4432

Ixazomib Citrate (MLN9708)

Ixazomib citrate (MLN9708, Ninlaro) is a prodrug of Ixazomib (MLN2238), which is a selective, orally bioavailable inhibitor of 20S proteasome that inhibits the chymotrypsin-like proteolytic (β5) site with IC50 of 3.4 nM and Ki of 0.93 nM, respectively. Ixazomib (MLN2238) also inhibits caspase-like (β1) and trypsin-like (β2) proteolytic sites with IC50 of 31 nM and 3500 nM, respectively.

S7933

VR23

VR23 is a potent proteasome inhibitor with IC50 of 1 nM, 50-100 nM, and 3 μM for trypsin-like proteasomes, chymotrypsin-like proteasomes, and caspase-like proteasomes, respectively.

S5813

Isoginkgetin

Isoginkgetin is a naturally derived biflavonoid with anti-tumor activity. Isoginkgetin directly inhibits the chymotrypsin-like, trypsin-like, and caspase-like activities of the 20S proteasome. Isoginkgetin also is a general inhibitor of Pre-mRNA splicing.

S7504

Salinosporamide A (NPI-0052)

Salinosporamide A (NPI-0052, ML858, Marizomib, MRZ) is a novel marine derived proteasome inhibitor which inhibits CT-L β5, C-L β1, and T-L β2 proteasome activities in human erythrocyte-derived 20S proteasomes with IC50 of 3.5 nM, 430 nM, 28 nM.

S6851

RA-190

RA190, a bis-benzylidine piperidon, is a potent, selective and oral effective inhibitor of proteasome ubiquitin receptor RPN13/ADRM1 with anticancer activity. RA190 triggers ER stress response, p53/p21 signaling axis and autophagy in multiple myeloma cells.

S7462

PI-1840

PI-1840 is a reversible and selective chymotrypsin-like (CT-L) inhibitor with IC50 of 27 nM with little effects on the other two major proteasome proteolytic activities, trypsin-like (T-L) and postglutamyl-peptide-hydrolysis-like (PGPH-L).

Catalog No. Information Product Use Citations Product Validations
S3269

Acetylcorynoline

Acetylcorynoline, a major alkaloid component derived from Corydalis bungeana which is a traditional Chinese medical herb, shows anti-inflammatory properties. Acetylcorynoline may decrease egl-1 expression to suppress apoptosis pathways and increase rpn5 expression to enhance the activity of proteasomes.