1. MAPK/ERK Pathway
  2. MEK


MEK (Mitogen-activated protein kinase kinase, MAPKK) is a kinase enzyme which phosphorylates mitogen-activated protein kinases (MAPKs). The activated MAPK leads to the phosphorylation of downstream transcription factors that regulate various responses such as stress signaling, pathogen response, and hormone signaling.

In general, the MAPKKK phosphorylates a serine or threonine residue on a MAPKK, which sequentially activates a MAPK (ERK, p38 or JNK), the last protein in the cascade. Activation of the p38 MAPK occurs mainly through mitogen-activated protein kinase kinase 3 (MKK3) and MKK6 (sometimes MKK4). The JNK is regulated by two upstream MAP2Ks: MKK4 and MKK7. The highly homologous kinases, MEK1 and MEK2, act downstream of Ras and Raf to activate ERK mitogen-activated protein kinases.

MEK Related Products (76):

Cat. No. Product Name Effect Purity
  • HY-10254
    Mirdametinib Inhibitor 99.95%
    Mirdametinib (PD0325901) is an orally active, selective and non-ATP-competitive MEK inhibitor with an IC50 of 0.33 nM. Mirdametinib exhibits a Kiapp of 1 nM against activated MEK1 and MEK2. Mirdametinib suppresses the expression of p-ERK1/2 and induces apoptosis. Mirdametinib has anti-cancer activity for a broad spectrum of human tumor xenografts[1][2][3].
  • HY-10999
    Trametinib Inhibitor 99.92%
    Trametinib (GSK1120212; JTP-74057) is an orally active MEK inhibitor that inhibits MEK1 and MEK2 with IC50s of about 2 nM. Trametinib activates autophagy and induces apoptosis[1][2].
  • HY-12031
    U0126-EtOH Inhibitor
    U0126 (U0126-EtOH) is a potent, non-ATP competitive and selective MEK1 and MEK2 inhibitor, with IC50s of 72 nM and 58 nM, respectively. U0126 is an autophagy and mitophagy inhibitor[1][2][3][4].
  • HY-50706
    Selumetinib Inhibitor 99.87%
    Selumetinib (AZD6244) is selective, non-ATP-competitive oral MEK1/2 inhibitor, with an IC50 of 14 nM for MEK1. Selumetinib (AZD6244) inhibits ERK1/2 phosphorylation.
  • HY-12028
    PD98059 Inhibitor 99.94%
    PD98059 is a potent and selective MEK inhibitor with an IC50 of 5 µM. PD98059 binds to the inactive form of MEK, thereby preventing the activation of MEK1 (IC50 of 2-7 µM) and MEK2 (IC50 of 50 µM) by upstream kinases. PD98059 is a ERK1/2 signaling inhibitor. PD98059 is a ligand for the aryl hydrocarbon receptor (AHR), and suppresses TCDD binding (IC50 of 4 μM) and AHR transformation (IC50 of 1 μM). PD98059 also inhibits Mycobacterium bovis Bacillus CalmetteGuerin (BCG)-induced autophagy[1][2][3].
  • HY-P4133
    MEK1 Derived Peptide Inhibitor 1
    MEK1 Derived Peptide Inhibitor 1 is a peptide inhibitor. MEK1 Derived Peptide Inhibitor 1 can inhibit the in vitro activation of ERK2 by MEK1 with an IC50 value of 30 μM. MEK1 Derived Peptide Inhibitor 1 can be used for the research of cell-permeable[1].
  • HY-148507
    GSK1790627 Inhibitor
    GSK1790627 is the N-deacetylated metabolite of Trametinib (HY-10999). Trametinib is an orally active MEK inhibitor, and activates autophagy and induces apoptosis[1].
  • HY-10508
    (R)-PD 0325901CL Inhibitor
    (R)-PD 0325901CL is an isomer of PD 0325901CL. PD 0325901CL is a selective inhibitor of mitogen-activated protein kinase kinase (MEK) involved in cancer research. PD 0325901CL inhibits the growth of cancer cells in vitro and in vivo[1].
  • HY-107619
    PD-334581 Inhibitor
    PD-334581 is a MEK1 inhibitor[1].
  • HY-15496
    E6201 Inhibitor
    E6201 (ER-806201) is an ATP-competitive dual kinase inhibitor of MEK1 and FLT3. E6201 inhibits MEK1- induced ERK2 phosphorylation with an IC50 value of 5.2 nM, MKK4-induced JNK phosphorylation with an IC50 value of 91 nM, and MKK6-induced p38 MAPK phosphorylation with an IC50 value of 19 nM. Anti-tumor and anti-psoriasis efficacy[1][2].
  • HY-12062
    PD318088 Inhibitor 99.88%
    PD318088 is a potent, allosteric and non-ATP competitive MEK1/2 inhibitor, an analog of PD184352 (HY-50295). PD318088 binds simultaneously with ATP in a region of the MEK1 active site that is adjacent to the ATP-binding site. PD318088 can be used for cancer research[1].
  • HY-100627A
    APS-2-79 hydrochloride Antagonist
    APS-2-79 hydrochloride is a KSR-dependent MEK antagonist. APS-2-79 inhibits ATPbiotin binding to KSR2 within the KSR2-MEK1 complexe with an IC50 of 120 nM. APS-2-79 makes the stabilization of the KSR inactive state antagonizes oncogenic Ras-MAPK signaling[1].
  • HY-114189
    GW284543 Inhibitor 99.99%
    GW284543 (UNC10225170) is a selective MEK5 inhibitor. GW284543 reduces pERK5, and decreases endogenous MYC protein[1].
  • HY-50706A
    Selumetinib sulfate Inhibitor 99.59%
    Selumetinib (AZD6244) is selective, non-ATP-competitive oral MEK1/2 inhibitor, with an IC50 of 14 nM for MEK1. Selumetinib (AZD6244) inhibits ERK1/2 phosphorylation.
  • HY-B0185A
    Lidocaine hydrochloride Inhibitor 99.81%
    Lidocaine hydrochloride (Lignocaine hydrochloride) inhibits sodium channels involving complex voltage and using dependence[1]. Lidocaine hydrochloride decreases growth, migration and invasion of gastric carcinoma cells via up-regulating miR-145 expression and further inactivation of MEK/ERK and NF-κB signaling pathways. Lidocaine hydrochloride is an amide derivative and a drug to treat ventricular arrhythmia and an effective tumor-inhibitor[2].
  • HY-10216
    Refametinib (R enantiomer) Inhibitor
    Refametinib R enantiomer is a MEK inhibitor extracted from patent WO2007014011A2, compound 1022, has an EC50 of 2.0-15 nM.
  • HY-143468
    MEK-IN-5 Inhibitor
    MEK-IN-5 is a potent MEK inhibitor and NO donor. MEK-IN-5 significantly reduces the levels of pMEK and pERK in a dose-dependent and time-dependent manner. MEK-IN-5 induces apoptosis in MDA-MB-231 cells[1].
  • HY-12058
    AZD8330 Inhibitor 99.14%
    AZD8330 (ARRY-424704) is a potent, uncompetitive MEK1/MEK2 inhibitor, with an IC50 of 7 nM.
  • HY-13079
    Cobimetinib (R-enantiomer) Inhibitor
    Cobimetinib R-enantiomer is the less active R-enantiomer of Cobimetinib. Cobimetinib is a potent and selective MEK inhibitor.
  • HY-13064A
    Cobimetinib hemifumarate Inhibitor
    Cobimetinib hemifumarate is a novel selective MEK1 inhibitor, and the IC50 value against MEK1 is 4.2 nM.