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-148266
    UBA5-IN-1
    		Inhibitor ≥98.0%
    UBA5-IN-1 (compound 8.5) is a selective UBA5 inhibitor with an IC50 value of 4.0 μM. UBA5-IN-1 inhibits cell proliferation of Sk-Luci6 cancer cells with high expression levels of UBA5.
    UBA5-IN-1
  • 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-128842
    PROTAC MDM2 Degrader-3
    		Inhibitor
    PROTAC MDM2 Degrader-3 is a MDM2 degrader based on PROTAC technology. PROTAC MDM2 Degrader-3 composes of a potent MDM2 inhibitor, linker, and the MDM2 ligand for E3 ubiquitin ligase.
    PROTAC MDM2 Degrader-3
  • HY-111505
    NAcM-OPT
    		Inhibitor 99.65%
    NAcM-OPT is an orally bioavailable cullin neddylation 1 (DCN1) inhibitor, which potently inhibits the DCN1-UBE2M interaction.
    NAcM-OPT
  • HY-124602
    DI-591
    		Inhibitor 99.42%
    DI-591 is a potent, high-affinity and cell-permeable inhibitor of the DCN1-UBC12 interaction. DI-591 binds to DCN1 and DCN2 with Ki values of 12 nM and 10.4 nM, respectively and has no appreciable binding to DCN3, DCN4, and DCN5 proteins. DI-591 selectively inhibits neddylation of cullin 3 but has no or minimal effect on neddylation of other cullin family members.
    DI-591
  • 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-148900
    SCFSkp2-IN-2
    		Inhibitor 99.44%
    SCFSkp2-IN-2 (Compound AAA-237) is a Skp2 inhibitor with a KD of 28.77 μM. AAA-237 induces apoptosis of NSCLC cells and shows antitumor activities.
    SCFSkp2-IN-2
  • HY-100892
    MX69
    		Inhibitor 99.88%
    MX69 is an inhibitor of MDM2/XIAP, used for cancer treatment.
    MX69
  • 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-123578
    NSC689857
    		Inhibitor 99.65%
    NSC689857 is a potent EGFR and SCFSKP2 inhibitor with an IC50 value of 36 μM for Skp2-Cks1. NSC689857 can inhibit p27 ubiquitylation (IC50=30 μM). NSC689857 has varied activity across cancer types, with more activity against leukemia cell lines than others.
    NSC689857
  • HY-W229874
    EN106
    		Inhibitor 99.85%
    EN106 is a potent inhibitor of FEMIB. EN106 is a cysteine-reactive covalent ligand. EN106 disrupts recognition of the key reductive stress substrate of FEM1B, FNIP1.
    EN106
  • HY-15335
    Nutlin-3b
    		Inhibitor 98.78%
    Nutlin-3b, the inactive form of Nutlin-3 (HY-50696), is a p53/MDM2 inhibitor with an IC50 of 13.6 μM. Nutlin-3b is 150 times less potent in binding to MDM2 than Nutlin-3a (HY-10029). Nutlin-3b is promising for research of cancers.
    Nutlin-3b
  • HY-115715
    EN219
    		98.56%
    EN219 is a moderately selective synthetic covalent ligand against an N-terminal cysteine (C8) of RNF114 with an IC50 of 470 nM. EN219 inhibits RNF114-mediated autoubiquitination and p21 ubiquitination.
    EN219
  • HY-128841
    PROTAC MDM2 Degrader-2
    		Inhibitor
    PROTAC MDM2 Degrader-2 is a MDM2 degrader based on PROTAC technology. PROTAC MDM2 Degrader-2 composes of a potent MDM2 inhibitor, linker, and the MDM2 ligand for E3 ubiquitin ligase (CN108610333A).
    PROTAC MDM2 Degrader-2
  • HY-49444
    EN450
    		99.28%
    EN450 is a cysteine-reactive covalent molecular glue degrader targeting NF-κB. EN450 interacts with allosteric C111 in the E2 ubiquitin ligase UBE2D. EN450 induces the ternary complex formation between UBE2D and NFKB1. EN450 exerts its anti-proliferative effects through a Cullin E3 ligase and proteasome-dependent mechanism.
    EN450
  • HY-157435
    PELI1-IN-1
    		Inhibitor 98.14%
    PELI1-IN-1 (compound 3d) is a potent inhibitor of PELI1, E3 ubiquitin ligase. PELI1-IN-1 has anti-tumor effect.
    PELI1-IN-1
  • HY-160799
    HA-9104
    		98.06%
    HA-9104 is a potent and selective inhibitor of cullin-5 neddylation via virtually targeting the V30 pocket of UBE2F. HA-9104 binds to UBE2F, reduces its protein levels, and consequently inhibits cullin-5 neddylation. HA-9104 has potent growth suppression and radiosensitizing activities via targeting the UBE2F-CRL5 axis and causing DNA damage, leading to induction of apoptosis and G2/M arrest in lung and pancreatic cancer cells.
    HA-9104
  • HY-101266B
    Milademetan tosylate hydrate
    		Inhibitor 98.89%
    Milademetan (DS-3032) tosylate hydrate is a specific and orally active MDM2 inhibitor for the research of acute myeloid leukemia (AML) or solid tumors. Milademetan (DS-3032) tosylate hydrate induces G1 cell cycle arrest, senescence and apoptosis.
    Milademetan tosylate hydrate
  • HY-139662
    HB007
    		Inhibitor 99.73%
    HB007 is a small ubiquitin-related modifier 1 (SUMO1) degrader. HB007 induces ubiquitination and degradation of SUMO1, resulting in reduced tumor growth in vivo. HB007 can be used for the research of brain, breast, colon, and lung cancers.
    HB007
  • HY-145733
    DI-1859
    		Inhibitor 99.83%
    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
Cat. No. Product Name / Synonyms Species Source
Cat. No. Product Name / Synonyms Application Reactivity