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-141448
    NRX-2663
    		Inhibitor 98.0%
    NRX-2663 is an enhancer of the interaction between β-catenin, and its cognate E3 ligase, SCFβ-TrCP. NRX-2663 enhances the binding of β-catenin peptide for β-TrCP with an EC50 of 22.9 μM and a Kd of 54.8 nM.
    NRX-2663
  • HY-160928
    Smurf1 modulator-1
    		Inhibitor 99.76%
    Smurf1 modulator-1 (Compound 20) is a selective inhibitor for Smad ubiquitination regulatory factor 1 (Smurf1), with IC50 of 180 nM.
    Smurf1 modulator-1
  • 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-160876
    BC-1901S
    		99.81%
    BC-1901S is a proteasome-independent NRF2 activator and stabilizer. BC-1901S binds to DCAF1 (E3 ligase subunit) and disrupts NRF2/DCAF1 interaction, and activates NRF2 by inhibiting NRF2 ubiquitination in a KEAP1-independent manner. BC-1901S shows anti-inflammatory effect in a murine model of LPS-induced acute lung injury.
    BC-1901S
  • HY-P3709A
    TRAF6 peptide TFA
    		Inhibitor 98.20%
    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-129531
    MuRF1-IN-1
    		98.16%
    MuRF1-IN-1 is an orally active MuRF1 inhibitor. MuRF1-IN-1 can inhibit the interaction between MuRF1 and titin as well as E3 ligase activity. MuRF1-IN-1 can alleviate skeletal muscle atrophy and dysfunction in cardiac cachexia.
    MuRF1-IN-1
  • HY-70027A
    p53 and MDM2 proteins-interaction-inhibitor dihydrochloride
    		Inhibitor 99.56%
    p53 and MDM2 proteins-interaction-inhibitor dihydrochloride is an inhibitor of the interaction between p53 and MDM2 proteins.
    p53 and MDM2 proteins-interaction-inhibitor dihydrochloride
  • HY-12287
    YH239-EE
    		Inhibitor 98.28%
    YH239-EE, ethyl ester of the free carboxylic acid compound YH239, is a potent p53-MDM2 antagonizing and apoptosis-inducing agent.
    YH239-EE
  • HY-W340313
    p53-MDM2-IN-4
    		Inhibitor 99.79%
    p53-MDM2-IN-4 (Example 4) is an inhibitor of p53-MDM2/X protein interaction, with a Ki value of 3.079 μM. p53-MDM2-IN-4 can be used in anti-tumor research.
    p53-MDM2-IN-4
  • HY-103436
    NSC624206
    		Inhibitor 99.0%
    NSC624206 is an inhibitor of ubiquitin E1 (UBA1), with an IC50 of ~9 μM. NSC624206 specifically blocks ubiquitin-thioester formation (IC50=13 μM) but has no effect on ubiquitin adenylation.
    NSC624206
  • HY-151358
    SENP2-IN-1
    		Inhibitor 98.05%
    SENP2-IN-1 (compound 77) is a selective SENP2 inhibitor. SENP2-IN-1 shows inhibitory activities with IC50s of 1.3, 0.69 and 22.7 μM for SENP1, SENP2 and SENP5, respectively. SENP2-IN-1 can be used for the research of cancer.
    SENP2-IN-1
  • HY-W340839
    p53-MDM2-IN-1
    		Inhibitor 99.91%
    p53-MDM2-IN-1 (Example 30) is an inhibitor of p53-MDM2/X protein interaction with an Ki value of 23.35 µM. p53-MDM2-IN-1 can be used for anti-tumor research.
    p53-MDM2-IN-1
  • HY-W004883
    3-Amino-4,6-dimethylpyridine
    		Inhibitor 99.87%
    3-Amino-4,6-dimethylpyridine (5A-DMP) is a UHRF1 inhibitor that targets the Arg-binding cavity site within the UHRF1 TTD domain. 3-Amino-4,6-dimethylpyridine disrupts the interaction between UHRF1 and LIG1, interfering with DNA methylation, and can be utilized in cancer research.
    3-Amino-4,6-dimethylpyridine
  • HY-15954B
    NVP-CGM097 sulfate
    		Inhibitor 98.82%
    NVP-CGM097 sulfate is a potent and selective MDM2 inhibitor with IC50 of 1.7±0.1 nM for hMDM2.
    NVP-CGM097 sulfate
  • HY-141482
    WSB1 Degrader 1
    		Inhibitor 99.81%
    WSB1 Degrader 1 is a poten and orally active WSB1 (WD repeat and SOCS box-containing 1) degrader. WSB1 Degrader 1 has anticancer metastatic effects.
    WSB1 Degrader 1
  • HY-125858A
    MI-1061 TFA
    		Inhibitor
    MI-1061 TFA is a potent, orally bioavailable, and chemically stable MDM2 (MDM2-p53 interaction) inhibitor (IC50=4.4 nM; Ki=0.16 nM). MI-1061 TFA potently activates p53 and induces apoptosis in the SJSA-1 xenograft tumor tissue in mice. Anti-tumor activity.
    MI-1061 TFA
  • HY-156768
    Cbl-b-IN-12
    		Inhibitor
    Cbl-b-IN-12 (Example 10) is a casitas B-lineage lymphoma-b (CBL-B) inhibitor with an IC50 of <100 nM.
    Cbl-b-IN-12
  • HY-109045A
    Teslexivir hydrochloride
    		Inhibitor 99.34%
    Teslexivir (BTA074) hydrochloride is a potent antiviral agent. Teslexivir hydrochloride is a potent and selective inhibitor of the interaction between two essential viral proteins, E1 and E2, an association that is a necessary step in the DNA replication and thus viral production for Human Papilloma Virus (HPV) 6 and 11. Teslexivir hydrochloride can be used for condyloma research.
    Teslexivir hydrochloride
  • HY-155477
    Cbl-b-IN-15
    		Inhibitor
    Cbl-b-IN-15 (compound 25) is an inhibitor of the RING finger E3 ligase Cbl (IC50: 15 nM). Cbl-b refers to Casitas B-lineage lymphoma proto-oncogene-b, which inhibits T-cell, natural killer (NK) cell, and B-cell activation. Cbl-b-IN-15 activates T cell function with EC50=0.41 μM.
    Cbl-b-IN-15
  • HY-170823
    PRC1-IN-1
    		Inhibitor
    PRC1-IN-1 (compound RB-4) is an inhibitor of the polycomb repressive complex PRC1 (IC50=2.3 μM), targeting RING1B-BMI1, RING1A-BMI1, and RING1B-PCGF1 with IC50s of 2.8, 2.6, and 1.8 μM, respectively.
    PRC1-IN-1
Cat. No. Product Name / Synonyms Species Source
Cat. No. Product Name / Synonyms Application Reactivity