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-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-134594
    SENP1-IN-1
    		Inhibitor 99.81%
    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-120086
    RO-5963
    		Inhibitor 99.97%
    RO-5963 is a dual p53-MDM2 and p53-MDMX inhibitor with IC50s of ~17 nM and ~24 nM, respectively.
    RO-5963
  • HY-153937
    Skp2 inhibitor 2
    Skp2 inhibitor 2 (14f) is an inhibitor of F-box protein S-phase kinase-associated protein 2 (Skp2), with an IC50 value of 10.2 μM (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-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-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-U00442
    CTX1
    		Inhibitor
    CTX1 is a p53 activator that overcomes HdmX-mediated p53 repression. CTX1 exhibits potent anti-cancer activity in a mouse acute myeloid leukemia (AML) model system.
    CTX1
  • HY-110174
    NAB2
    		Agonist 99.69%
    NAB2 is a neuron-protective agent. NAB2 strongly and selectively protects diverse cell types from α-syn toxicity. NAB2 promots endosomal transport events dependent on the E3 ubiquitin ligase Rsp5/Nedd4. NAB2 identifies a agentgable node in the biology of α-syn that can correct multiple aspects of its underlying pathology, including dysfunctional endosomal and endoplasmic reticulum-to-Golgi vesicle trafficking.
    NAB2
  • HY-W176629
    Hydrocotarnine
    		Inhibitor 99.59%
    Hydrocotarnine is a Cbl inhibitor, and results in inflammasome-mediated IL-18 secretion in colitis. Hydrocotarnine increases expression of GLUT1 and cellular glucose uptake in glycolytic metabolism. Hydrocotarnine acts as an agent that provides analgesic effect in cancer research.
    Hydrocotarnine
  • HY-W062696
    BC-1382
    		Inhibitor 99.53%
    BC-1382 is a potent ubiquitin E3 ligase HECTD2 inhibitor that specificly disrupts the HECTD2/PIAS1 interaction (IC50≈ 5 nM).Anti-inflammatory activity.
    BC-1382
  • HY-103046
    UbcH5c-IN-1
    		Inhibitor 99.84%
    UbcH5c-IN-1 (compound 6d) is a potent and selective small-molecule inhibitor of Ubiquitin-conjugating enzyme UbcH5c, with a Kd of 283 nM for E2 UbcH5c-IN-1 by covalent binding with Cys85. A promising lead compound for the development of new antirheumatoid arthritis (RA) agent.
    UbcH5c-IN-1
  • HY-P3709A
    TRAF6 peptide TFA
    		Inhibitor
    TRAF6 peptide TFA is a specific TRAF6-p62 inhibitor. TRAF6 peptide TFA potently abrogates NGF-dependent TrkA ubiquitination. TRAF6 peptide TFA has good research potential in neurological diseases such as alzheimer's disease (AD), parkinson's, ALS, head trauma, epilepsy and stroke.
    TRAF6 peptide TFA
  • HY-156395
    MN551
    		Inducer 98.05%
    MN551 is a potent inhibitor of cysteine-directed electrophilic covalent that plays important roles in the biology of SOCS2 and its CRL5 complex, and as E3 ligase handles in proteolysis targeting chimera (PROTACs) to induce targeted protein degradation.
    MN551
  • HY-157416
    COP1-ATGL modulator 1
    		99.31%
    COP1-ATGL modulator 1 (86) is an orally active modulator for COP1-ATGL axis. COP1-ATGL modulator 1 (86) could increase ATGL protein expression, reduce ATGL ubiquitination and COP1 autoubiquitination, and diminish lipid accumulation in hepatocytes in the nanomolar range.
    COP1-ATGL modulator 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
  • HY-158239
    MS181
    		Inhibitor 98.36%
    MS181 (compound 1) is a potent cereblon (CRBN)-recruiting and EED-binding polycomb repressive complex 1 (PRC1) PROTAC degrader. MS181 decreases the expression of EED, EZH2, SUZ12, BMI1 and RING1B. MS181 shows antiproliferative activity (Strtucture Note: Red, EED binder (HY-158771); Blue, CRBN ligand (HY-41547); Black, Linker HY-131717).
    MS181
  • HY-100383
    BH3I-1
    		Inhibitor ≥98.0%
    BH3I-1 is a Bcl-2 family antagonist, which inhibits the binding of the Bak BH3 peptide to Bcl-xL with a Ki of 2.4±0.2 μM in FP assay. BH3I-1 has a Kd of 5.3 μM against the p53/MDM2 pair.
    BH3I-1
Cat. No. Product Name / Synonyms Species Source
Cat. No. Product Name / Synonyms Application Reactivity