PSI (Proteasome Inhibitor 1) is a potent proteasome inhibitor. PSI inhibits the proliferation of primary effusion lymphoma (PEL) cells. PSI has the potential for the research of Kaposi’s sarcoma-associated herpesvirus (KSHV) infection and KSHV-associated lymphomas.

Dihydroeponemycin, an analogue of the antitumor and antiangiogenic natural product eponemycin, selectively targets the 20S proteasome. Dihydroeponemycin covalently modifies a subset of catalytic proteasomal subunits, binding preferentially to the IFN-gamma-inducible subunits LMP2 and LMP7. Dihydroeponemycin-mediated proteasome inhibition induces a spindle-like cellular morphological change and apoptosis.

PTP1B-IN-9 is a ubiquitin-proteasome system (UPS)-stressor. PTP1B-IN-9 inhibits ubiquitin-mediated protein degradation upstream of the 20S proteasomal catalytic activites. PTP1B-IN-9 triggers a ubiquitin-proteasome-system (UPS)-stress response without affecting 20S proteasome catalytic activities. Anticancer activity.

5-Amino-8-hydroxyquinoline (5A8HQ), a potential anticancer candidate, has promising proteasome inhibitory activity.

Calpain-2-IN-1 is a calpain-2 selective inhibitor that enhances learning & memory by prolonging ERK activation.

TCH-165 is a specific small molecule modulator of proteasome assembly, regulates the dynamic equilibrium between the 20S and 26S proteasome complexes, favoring 20S-mediated protein degradation.

MG-101 is a calpain inhibitor (IC50 = 0.09 μM) that activates p53-dependent apoptosis in tumor cell lines.

Calpain Inhibitor-1 (compound 36) is a potent and selective cysteine protease calpain 1 (Cal1) inhibitor (IC50=100 nM; Ki=2.89 μM).

Dazcapistat is a potent calpain inhibitor, with IC50s of <3 μM for calpain 1, calpain 2 and calpain 9, respectively (patent WO2018064119A1, compound 405).

RA375 is a RPN13 (26S proteasome regulatory subunit) inhibitor. RA375 activates UPR signaling, ROS production and apoptosis. RA375 exhibits ten-fold greater activity against cancer lines than RA190, reflecting its nitro ring substituents and the addition of a chloroacetamide warhead.

KZR-616 maleate, a first-in-class immunoproteasome inhibitor, selectively targets the LMP7 (IC50: 39/57 nM=hLMP7/mLMP7) and LMP2 (IC50: 131/179 nM=hLMP7/mLMP7) subunits of the immunoproteasome. KZR-616 maleate has the potential for the research of multiple autoimmune diseases.

18α-Glycyrrhetinic acid, a diet-derived compound, is an inhibitor of NF-kB and an activator of proteasome, which serves as pro-longevity and anti-aggregation factor in a multicellular organism. 18α-Glycyrrhetinic acid induces apoptosis.

PR-39 TFA, a natural proline- and arginine-rich antibacterial peptide, is a noncompetitive, reversible and allosteric proteasome inhibitor. PR-39 TFAreversibly binds to the α7 subunit of the proteasome and blocks degradation of NF-κB inhibitor IκBα by the ubiquitin-proteasome pathway. PR-39 TFA stimulates angiogenesis, inhibits inflammatory responses and significant reduces myocardial infarct size in mice.

PR-39, a natural proline- and arginine-rich antibacterial peptide, is a noncompetitive, reversible and allosteric proteasome inhibitor. PR-39 reversibly binds to the α7 subunit of the proteasome and blocks degradation of NF-κB inhibitor IκBα by the ubiquitin-proteasome pathway. PR-39 stimulates angiogenesis, inhibits inflammatory responses and significant reduces myocardial infarct size in mice.

Acetyl-Calpastatin(184-210)(human) TFA is a potent, selective and reversible calpain inhibitor with Ki values of 0.2 nM and 6 μM for μ-calpain and cathepsin L, respectively.

Acetyl-Calpastatin(184-210)(human) is a potent, selective and reversible calpain inhibitor with Ki values of 0.2 nM and 6 μM for μ-calpain and cathepsin L, respectively.

(Rac)-Calpain Inhibitor XII is a reversible and selective inhibitor of calpain I (μ-calpain, Ki=19 nM), with lower affinities for calpain II (m-calpain, Ki=120 nM) and cathepsin B (Ki=750 nM). (Rac)-Calpain Inhibitor XII has been used to study the role of calpains in diverse processes, including neutrophil chemotaxis, neuronal signaling, and cardiac response to injury.

(1S,2S)-Bortezomib is an enantiomer of Bortezomib. Bortezomib is a cell-permeable, reversible, and selective proteasome inhibitor, and potently inhibits 20S proteasome (Ki of 0.6 nM) by targeting a threonine residue. Bortezomib disrupts the cell cycle, induces apoptosis, and inhibits NF-κB. Bortezomib is an anti-cancer agent and the first therapeutic proteasome inhibitor to be used in humans.

ONX 0914 is an immunoproteasome inhibitor with potential treatment applications in autoimmune disorders, such as rheumatoid arthritis, inflammatory bowel disease and lupus.

KZR-504 is a highly selective and orally active inhibitor of immunoproteasome low molecular mass polypeptide 2 (LMP2), with IC50s of 51 nM, 4.274 μM for LMP2 and LMP7, respectively.

A potent, orally bioavailable, irreversible proteasome inhibitor with potent antimyeloma activity (IC50<60 nM).