1. Signaling Pathways
  2. Metabolic Enzyme/Protease
  3. Proteasome


Proteasomes are very large protein complexes inside all eukaryotes and archaea, and in some bacteria. In eukaryotes, they are located in the nucleus and the cytoplasm. The main function of the proteasome is to degrade unneeded or damaged proteins by proteolysis, a chemical reaction that breaks peptide bonds. Enzymes that carry out such reactions are called proteases. Proteasomes are part of a major mechanism by which cells regulate the concentration of particular proteins and degrade misfolded proteins. The degradation process yields peptides of about seven to eight amino acids long, which can then be further degraded into amino acids and used in synthesizing new proteins. Proteins are tagged for degradation with a small protein called ubiquitin. The tagging reaction is catalyzed by enzymes called ubiquitin ligases. Once a protein is tagged with a single ubiquitin molecule, this is a signal to other ligases to attach additional ubiquitin molecules. The result is a polyubiquitin chain that is bound by the proteasome, allowing it to degrade the tagged protein.

Proteasome Related Products (46):

Cat. No. Product Name Effect Purity
  • HY-13259
    MG-132 Inhibitor >98.0%
    MG-132 (Z-Leu-Leu-Leu-al) is a potent proteasome and calpain inhibitor with IC50s of 100 nM and 1.2 μM, respectively. MG-132 effectively blocks the proteolytic activity of the 26S proteasome complex. MG-132, a peptide aldehyde, also is an autophagy activator. MG-132 also induces apoptosis.
  • HY-10227
    Bortezomib Inhibitor 99.97%
    Bortezomib (PS-341) is a reversible and selective proteasome inhibitor, and potently inhibits 20S proteasome (Ki=0.6 nM) by targeting a threonine residue. Bortezomib disrupts the cell cycle, induces apoptosis, and inhibits NF-κB. Bortezomib is the first proteasome inhibitor anticancer agent. Anti-cancer activity.
  • HY-10455
    Carfilzomib Inhibitor 99.96%
    Carfilzomib is an irreversible proteasome inhibitor with an IC50 of 5 nM in ANBL-6 and RPMI 8226 cells.
  • HY-13067
    Tripterin Inhibitor 99.91%
    Tripterin (Celastrol) is a proteasome inhibitor which potently and preferentially inhibits the chymotrypsin-like activity of a purified 20S proteasome with IC50 of 2.5 μM.
  • HY-10453
    Ixazomib Inhibitor >98.0%
    Ixazomib (MLN2238) is a selective, potent, and reversible proteasome inhibitor, which inhibits the chymotrypsin-like proteolytic (β5) site of the 20S proteasome with an IC50 of 3.4 nM (Ki of 0.93 nM).
  • HY-101786
    KZR-504 Inhibitor
    KZR-504 is a highly selective inhibitor of immunoproteasome low molecular mass polypeptide 2 (LMP2), with IC50s of 51 nM, 4.274 μM for LMP2 and LMP7, respectively. KZR-504 is of interest for the treatment of autoimmune disease.
  • HY-107412
    Proteasome inhibitor IX Inhibitor 98.53%
    Proteasome inhibitor IX (PS-IX; AM114) is a Chalcone derivative and a chymotrypsin-like activity of the 20S proteasome inhibitor with an IC50 value of ~1 μM. Proteasome inhibitor IX exhibits HCT116 p53+/+ cells growth inhibitory activity with an IC50 value of 1.49 μM. Proteasome inhibitor IX has potent anticancer activity.
  • HY-131350
    LXE408 Inhibitor
    LXE408 is an orally active, non-competitive and kinetoplastid-selective proteasome inhibitor. LXE408 has an IC50 of 0.04 μM for L. donovani proteasome and an EC50 of 0.04 μM for L. donovani. LXE408 has a low propensity to cross the blood brain barrier. LXE408 has the potential for visceral leishmaniasis (VL) research.
  • HY-13207
    ONX-0914 Inhibitor 98.86%
    ONX-0914 (PR-957) is a potent and selective inhibitor of immunoproteasome subunit LMP7.
  • HY-P0018A
    Pepstatin Trifluoroacetate Inhibitor 99.11%
    Pepstatin Trifluoroacetate (Pepstatin A Trifluoroacetate) is a specific aspartic protease inhibitor produced by actinomycetes, with IC50s of 4.5 nM, 6.2 nM, 150 nM, 290 nM, 520 nM and 260 nM for hemoglobin-pepsin, hemoglobin-proctase, casein-pepsin, casein-proctase, casein-acid protease and hemoglobin-acid protease, respectively. Pepstatin Ammonium also inhibits HIV protease.
  • HY-18236
    MDL-28170 Inhibitor >99.0%
    MDL-28170 (Calpain Inhibitor III) is a potent, selective and membrane-permeable cysteine protease inhibitor of calpain that rapidly penetrates the blood-brain barrier following systemic administration. MDL-28170 also block γ-secretase.
  • HY-13821
    Epoxomicin Inhibitor 98.81%
    Epoxomicin (BU-4061T) is an epoxyketone-containing natural product and a potent, selective and irreversible proteasome inhibitor. Epoxomicin covalently binds to the LMP7, X, MECL1, and Z catalytic subunits of the proteasome and potently inhibits primarily the chymotrypsin-like activity. Epoxomicin can cross the blood-brain barrier. Epoxomicin has strongly antitumor and anti-inflammatory activity.
  • HY-13259C
    (R)-MG-132 Inhibitor >98.0%
    (R)-MG-132 ((S,R,S)-(-)-MG-132) is the enantiomer of MG-132. (R)-MG-132 is a proteasome inhibitor with weaker cell cytotoxicity than MG-132. (R)-MG-132 stereoisomer is a more potent proteasome inhibitor than MG-132.
  • HY-10452
    Ixazomib citrate Inhibitor 99.80%
    Ixazomib citrate (MLN9708) is a reversible inhibitor of the chymotrypsin-like proteolytic β5 site of the 20S proteasome with an IC50 of 3.4 nM and a Ki of 0.93 nM.
  • HY-18964
    MG-101 Inhibitor >98.0%
    MG-101 is a potent inhibitor of cysteine proteases which inhibits calpain I, calpain II, cathepsin B and cathepsin L with Kis of 190, 220, 150 and 500 pM, respectively.
  • HY-100223
    Calpeptin Inhibitor >98.0%
    Calpeptin is a potent, cell penetrating calpain inhibitor, with an ID50 of 40 nM for Calpain I in human platelets. Calpeptin is also an inhibitor of cathepsin K.
  • HY-100529
    PD150606 Inhibitor >98.0%
    PD 150606 is a selective, cell-permeable non-peptide calpain inhibitor with Ki values of 0.21 μM and 0.37 μM for μ- and m-calpains respectively, which is neuroprotective.
  • HY-10454
    Delanzomib Inhibitor >98.0%
    Delanzomib (CEP-18770) is a potent and orally active chymotrypsin-like activity of the proteasome inhibitor with an IC50 of 3.8 nM. Delanzomib inhibits NF-κB activity, induces cancer cell apoptotic, and has strong antiangiogenic and anti-cancer activities.
  • HY-100739
    RA190 Inhibitor 99.47%
    RA190, a bis-benzylidine piperidon, inhibits proteasome function by covalently binding to cysteine 88 of ubiquitin receptor RPN13.
  • HY-N2306A
    Aclacinomycin A hydrochloride Inhibitor 98.08%
    Aclacinomycin A hydrochloride (Aclarubicin hydrochloride), a fluorescent molecule and the first described non-peptidic inhibitor showing discrete specificity for the CTRL (chymotrypsin-like) activity of the 20S proteasome. Aclacinomycin A hydrochloride is also a dual inhibitor of topoisomerase I and II. An effective anthracycline chemotherapeutic agent for hematologic cancers and solid tumors.
Isoform Specific Products

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