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-100487
    TAK-243
    		Inhibitor 98.38%
    TAK-243 (MLN7243) is a first-in-class, selective ubiquitin activating enzyme, UAE (UBA1) inhibitor (IC50=1 nM), which blocks ubiquitin conjugation, disrupting monoubiquitin signaling as well as global protein ubiquitination. TAK-243 (MLN7243) induces endoplasmic reticulum (ER) stress, abrogates NF-κB pathway activation and promotes apoptosis.
    TAK-243
  • HY-10029
    Nutlin-3a
    		Inhibitor 99.00%
    Nutlin-3a (Rebemadlin), an active enantiomer of Nutlin-3, is a potent murine double minute (MDM2) inhibitor (IC50=90 nM). Nutlin-3a inhibits MDM2-p53?interactions and stabilizes the p53 protein, and induces cell autophagy and apoptosis. Nutlin-3a has the potential for the study of TP53?wild-type ovarian carcinomas.
    Nutlin-3a
  • HY-111789
    Subasumstat
    		Inhibitor 98.56%
    Subasumstat (TAK-981) is a first in class and selective inhibitor of the SUMOylation enzymatic cascade, with potential immune-activating and antineoplastic activities.
    Subasumstat
  • HY-50696
    Nutlin-3
    		Inhibitor 98.90%
    Nutlin-3 is a commercial available p53-MDM2 inhibitor, with Ki of 90 nM.
    Nutlin-3
  • HY-15676
    Idasanutlin
    		Inhibitor 99.93%
    Idasanutlin (RG7388) is a potent and selective MDM2 antagonist, inhibiting p53-MDM2 binding, with an IC50 of 6 nM.
    Idasanutlin
  • HY-164027
    MyoMed 205
    		Inhibitor 98.00%
    MyoMed-205 is an inhibitor targeting the activity of MuRF1. MyoMed-205 prevents early diaphragmatic systolic dysfunction and atrophy due to unilateral diaphragmatic nerve denervation 12 hours later. MyoMed-205 reduces ubiquitination and subsequent proteasomal degradation of muscle proteins by inhibiting MuRF1 activity. MyoMed-205 increases levels of a protein that phosphorylates Akt (ser473), an important signaling molecule for muscle growth and maintenance. MyoMed-205 can be used to study and treat diaphragmatic dysfunction and atrophy (DIDD) caused by early apraxia, especially in clinical situations such as diaphragmatic paralysis or mechanical ventilation.
    MyoMed 205
  • HY-D2259
    PFI-7
    PFI-7 is a probe, which binds to human GID4 (KD is 79 nM), and antagonizes the binding of Pro/N-degrons. PFI-7 can be utilized in C-terminal to LisH (CTLH) complex research and development of targeted protein degradation.
    PFI-7
  • HY-162938
    Skp2 inhibitor 3
    		Inhibitor
    Skp2 inhibitor 3 (E35), an antitumor agent, is a potent S‑Phase Kinase-associated Protein 2 (SKP2) inhibitor, with an IC50 of 4.86 μM for Skp2-Cks1 binding. Skp2 inhibitor 3 (E35) significantly inhibits colony formation and migration, as well as arrests the cell cycle at the S-phase.
    Skp2 inhibitor 3
  • HY-12296
    Navtemadlin
    		Inhibitor 99.61%
    Navtemadlin (AMG 232) is a potent, selective and orally available inhibitor of p53-MDM2 interaction, with an IC50 of 0.6 nM. Navtemadlin binds to MDM2 with a Kd of 0.045 nM.
    Navtemadlin
  • HY-108702
    ML-792
    		Inhibitor 99.90%
    ML-792 is a potent and selective inhibitor of SAE/SUMO1 and SAE/SUMO2 in enzymatic assays (IC50 values of 3 and 11 nM, respectively) compared with NAE/NEDD8 and UAE/ubiquitin (IC50> values of 32 μM and >100 μM, respectively).
    ML-792
  • HY-129395
    Mezigdomide
    		Inhibitor 99.16%
    Mezigdomide (CC-92480), a cereblon E3 ubiquitin ligase modulating agent (CELMoD), acts as a molecular glue. Mezigdomide shows high affinity to cereblon, resulting in potent antimyeloma activity.
    Mezigdomide
  • HY-114166
    2-D08
    		Inhibitor 99.17%
    2-D08 is a cell permeable, mechanistically unique inhibitor of protein SUMOylation. 2-D08 also inhibits Axl with an IC50 of 0.49 nM.
    2-D08
  • HY-13296
    PYR-41
    		Inhibitor ≥98.0%
    PYR-41 is a selective and cell permeable inhibitor of ubiquitin-activating enzyme E1 with an IC50 of < 10 μM, with little activity at E2 and E3.
    PYR-41
  • HY-114312
    MD-224
    		Inhibitor 98.47%
    MD-224 is a first-in-class and highly potent small-molecule human murine double minute 2 (MDM2) degrader based on the proteolysistargeting chimera (PROTAC) concept. MD-224 consists of ligands for Cereblon and MDM2. MD-224 induces rapid degradation of MDM2 at concentrations <1 nM in human leukemia cells, and achieves an IC50 value of 1.5 nM in inhibition of growth of RS4;11 cells. MD-224 has the potential to be a new class of anticancer agent. MD-224 is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.
    MD-224
  • HY-120934
    C25-140
    		99.86%
    C25-140, a first-in-class, orally active, and fairly selective TRAF6-Ubc13 inhibitor, directly binds to TRAF6, and blocks the interaction of TRAF6 with Ubc13. C25-140 lowers TRAF6 activity, reduces NF-κB activation, and combats autoimmunity.
    C25-140
  • HY-122882
    HOIPIN-8
    		99.89%
    HOIPIN-8 is a potent inhibitor of linear ubiquitin chain assembly complex (LUBAC) with an IC50 of 11 nM. HOIPIN-8 is a HOIPIN-1 derivative with enhanced the potency by 255-fold in the petit-LUBAC inhibition, and 10-fold and 4-fold in the LUBAC- and TNF-α-mediated NF-κB activation, respectively than HOIPIN-1. HOIPIN-1 is a promising tool to explore the cellular functions of LUBAC.
    HOIPIN-8
  • HY-139514
    RB-3
    		Inhibitor 99.42%
    RB-3, a polycomb repressive complex 1 (PRC1) inhibitor, binds to RING1B-BMI1f, with a Kd of 2.8 μM.
    RB-3
  • HY-N0170
    Indole-3-carbinol
    		Inhibitor 98.87%
    Indole-3-carbinol (I3C) inhibits NF-κB activity and also is an Aryl hydrocarbon receptor (AhR) agonist, and an inhibitor of WWP1 (WW domain-containing ubiquitin E3 ligase 1).
    Indole-3-carbinol
  • HY-135844
    LS-102
    		Inhibitor
    LS-102 is a selective E3 ubiquitin ligase synoviolin (Syvn1) inhibitor. LS-102 inhibits the autoubiquitination of synoviolin with an IC50 of 35 μM. LS-102 has the potential for rheumatoid arthritis treatment.
    LS-102
  • HY-18658
    Siremadlin
    		Inhibitor 99.87%
    Siremadlin (NVP-HDM201) is a potent, orally bioavailable and highly specific p53-MDM2 interaction inhibitor.
    Siremadlin
Cat. No. Product Name / Synonyms Species Source
Cat. No. Product Name / Synonyms Application Reactivity