2. Signaling Pathways
  3. Metabolic Enzyme/Protease
  4. E1/E2/E3 Enzyme

E1/E2/E3 Enzyme

E1 activating enzyme; E2 conjugating enzyme; E3 ligating enzyme; Ubiquitin activating enzyme; Ubiquitin conjugating enzyme; Ubiquitin ligase

E1/E2/E3 Enzyme

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Ubiquitin (UB) is a protein modifier that regulates many essential cellular processes. To initiate protein modification by UB, the E1 enzyme activates the C-terminal carboxylate of UB to launch its transfer through the E1-E2-E3 cascade onto target proteins. The E1 enzyme is the activating enzyme, to which ubiquitin is attached in an ATP-dependent reaction by a thioester bond. The E2 enzyme is the conjugating enzyme, to which the ubiquitin is transferred from the E1. The E3 is the ubiquitin ligase, which directly or indirectly catalyzes the transfer of the ubiquitin to the target protein (the substrate), with the formation of an isopeptide bond.

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-149316
    Smurf1-IN-1
    		Inhibitor 99.47%
    Smurf1-IN-1 is an orally active and selective inhibitor of specific E3 ubiquitin protein ligase 1 (SMURF1) with an IC50 of 92 nM. Smurf1-IN-1 has significant efficacy in rats model of pulmonary hypertension.
    Smurf1-IN-1
  • HY-148602
    KH-4-43
    		Inhibitor 99.99%
    KH-4-43 is an inhibitor of E3 CRL4. KH-4-43 inhibits E3 CRL4's core ligase complex and exhibits anticancer activity. KH-4-43 has a binding Kd to E3 ROC1-CUL4A CTD or the highly related ROC1-CUL1 CTD at 83 nM or 9.4 μM, respectively.
    KH-4-43
  • HY-134823
    MD-222
    		Inhibitor 99.81%
    MD-222 is the first-in-class highly potent PROTAC degrader of MDM2. MD-222 consists of ligands for Cereblon and MDM2. MD-222 induces rapid degradation of the MDM2 protein and activation of wild-type p53 in cells. MD-222 has anticancer effects.
    MD-222
  • HY-P990165
    Anti-Mouse RANKL/CD254 Antibody (IK22/5)
    		Inhibitor
    Anti-Mouse RANKL/CD254 Antibody (IK22/5) is an anti-mouse RANKL/CD254 IgG2a monoclonal antibody. Anti-Mouse RANKL/CD254 Antibody (IK22/5) inhibits osteoclast formation and activity by specifically blocking the binding of RANKL and RANK. Anti-Mouse RANKL/CD254 Antibody (IK22/5) can inhibit the expression of MuRF1/Trogin-1 and activation of NF-κB. Anti-Mouse RANKL/CD254 Antibody (IK22/5) can be used for research on cancer such as melanoma or colon cancer and osteoporosis.
    Anti-Mouse RANKL/CD254 Antibody (IK22/5)
  • HY-128841
    PROTAC MDM2 Degrader-2
    		Inhibitor
    PROTAC MDM2 Degrader-2 is an MDM2 PROTAC degrader. PROTAC MDM2 Degrader-2 can induce the self-ubiquitination and degradation of MDM2, thereby upregulating the level of p53 protein. PROTAC MDM2 Degrader-2 has anti-tumor activity and can be used in the study of cancer. (Blue: MDM2 ligand (HY-128836); Black: linker (HY-128833))
    PROTAC MDM2 Degrader-2
  • HY-114304
    COH000
    		Inhibitor ≥98.0%
    COH000 is an allosteric, covalent and irreversible inhibitor of ubiquitin-like 1-activating enzyme (SUMO-activating enzyme) (E1), with an IC50 of 0.2 μM for SUMOylation in vitro.
    COH000
  • HY-145733
    DI-1859
    		Inhibitor 99.62%
    DI-1859 is a potent, selective and covalent inhibitor of DCN1. DI-1859 inhibits neddylation of cullin 3 in cells at low nanomolar concentrations. DI-1859 induces a robust increase of NRF2 protein, a CRL3 substrate, in mouse liver and effectively protects mice from acetaminophen-induced liver damage.
    DI-1859
  • HY-16999
    RO8994
    		Inhibitor 99.62%
    RO8994 (Compound 4) is an orally active, highly potent and selective spiroindolinone p53-MDM2 inhibitor with an IC50 value of 5 nM (HTRF binding assays) and 20 nM (MTT proliferation assays). RO8994 induces up-regulation of p53 expression and Apoptosis in wild-type p53 cancer cells. RO8994 also inhibits tumor growth in the tumor xenograft model.
    RO8994
  • HY-134594
    SENP1-IN-1
    		Inhibitor 99.55%
    SENP1-IN-1 is a specific deSUMOylation protease 1 (SENP1) inhibitor extracted from patent CN110627860, Compound 29. SENP1-IN-1 is developed for tumor radiosensitivity enhancement.
    SENP1-IN-1
  • HY-16664
    SJ-172550
    		Inhibitor 99.95%
    SJ-172550 is a small molecule inhibitor of MDMX; competes for the wild type p53 peptide binding to MDMX with an EC50 of 5 μM.
    SJ-172550
  • HY-134596
    SENP1-IN-3
    		Inhibitor 99.92%
    SENP1-IN-3 is a specific deSUMOylation protease 1 (SENP1) inhibitor extracted from patent CN110627860, Compound 17. SENP1-IN-3 is developed for tumor radiosensitivity enhancement.
    SENP1-IN-3
  • HY-153937
    Skp2 inhibitor 2
    		Inhibitor 99.88%
    Skp2 inhibitor 2 (compound 14ag) is an inhibitor of F-box protein S-phase kinase-associated protein 2 (Skp2), with an IC50 value of 570 nM (Skp2-Cks1). Skp2 is a part of cullin-RING ligases, which recruits and ubiquitinates substrates, involving in proteolytic and non-proteolytic process.
    Skp2 inhibitor 2
  • HY-15301
    CC0651
    		Inhibitor 99.03%
    CC0651 is an allosteric inhibitor of the human Cdc34 ubiquitin-conjugating enzyme. CC0651 potently (IC50=1.72 μM) inhibits the ubiquitination of p27Kip1, as confirmed by dose-response analysis.
    CC0651
  • HY-122615B
    SPOP-IN-6b dihydrochloride
    		Inhibitor 99.70%
    SPOP-IN-6b dihydrochloride is a potent speckle-type POZ protein (SPOP) inhibitor with an IC50 of 3.58 μM.
    SPOP-IN-6b dihydrochloride
  • HY-155120
    Cbl-b-IN-5
    		Inhibitor 99.61%
    Cbl-b-IN-5 (compound 6) is a Cbl-b inhibitor (IC50=3-10 µM). Cbl-b-IN-5 has the potential to be used in the study of cancer and related diseases amenable to immune system modulation.
    Cbl-b-IN-5
  • HY-126075A
    WS-383
    		Inhibitor 99.88%
    WS-383 is a potent, selective and reversible inhibitor of DCN1-UBC12 interaction, with an IC50 of 11 nM. WS-383 inhibits Cul3/1 neddylation, induces accumulation of p21, p27 and NRF2.
    WS-383
  • HY-141431
    Cbl-b-IN-2
    		Inhibitor
    Cbl-b-IN-2 (Example 8) is an orally bioavailable compound, can inhibit the E3 enzyme Casitas B-lineage lymphoma proto-oncogene-b (Cbl-b) in the ubiquitin proteasome pathway. Cbl-b-IN-2 can be used to modulate the immune system and diseases amenable to immune system modulation. Cbl-b-IN-2 (Example 8) also may be administered to an individual with cancer, either alone or as part of a combination, with one or more of an immune checkpoint inhibitor, an anti-neoplastic agent, and radiation agent.
    Cbl-b-IN-2
  • HY-156382
    SPOP-IN-1
    		Inhibitor 99.71%
    SPOP-IN-1 is a selective SPOP E3 ubiquitin ligase inhibitor. SPOP-IN-1 leads to the accumulation of tumor suppressors PTEN and DUSP7 and decreased levels of phosphorylated AKT and ERK in clear-cell renal cell carcinoma.
    SPOP-IN-1
  • HY-153178
    HECT E3-IN-1
    		Inhibitor 99.43%
    HECT E3-IN-1 (compound 3) is a HECT E3 ligase inhibitor. HECT E3-IN-1 (compound 3) disrupts Ub binding to the noncovalent Ub-binding site of Nedd4-1.
    HECT E3-IN-1
  • HY-153775
    UC-764864
    		Inhibitor 99.85%
    UC-764864 is a UBE2N inhibitor. UC-764864 inhibits UBE2N enzymatic activity. UC-764864 has cytotoxic effects and inhibition of UBE2N-dependent signaling in leukemic cells. UC-764864 blocks ubiquitination of innate immune- and inflammatory-related substrates in human AML cell lines.
    UC-764864
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Cat. No. Product Name / Synonyms Application Reactivity