1. PI3K/Akt/mTOR
    Cell Cycle/DNA Damage
  2. PI3K
    ATM/ATR
    DNA-PK

Wortmannin (Synonyms: SL-2052; KY-12420)

Cat. No.: HY-10197 Purity: 99.65%
Handling Instructions

Wortmannin is a multi-target inhibitor of PI3K and MLCK with IC50s of 3 nM and 200 nM, respectively. Wortmannin is also a potent inhibitor of DNA-PK (IC50, 16 nM) and ATM (IC50, 150 nM). Wortmannin is also a potent inhibitor of Polo-like kinase (Plk).

For research use only. We do not sell to patients.

Wortmannin Chemical Structure

Wortmannin Chemical Structure

CAS No. : 19545-26-7

Size Price Stock Quantity
10 mM * 1 mL in DMSO USD 106 In-stock
Stock in the United States
Estimated Time of Arrival: December 31
5 mg USD 96 In-stock
Stock in Sweden
Estimated Time of Arrival: December 31
10 mg USD 132 In-stock
Stock in Sweden
Estimated Time of Arrival: December 31
25 mg USD 288 In-stock
Stock in Sweden
Estimated Time of Arrival: December 31
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Customer Review

    Wortmannin purchased from MCE. Usage Cited in: Arthritis Res Ther. 2018 Feb 7;20(1):20.

    Cells preincubated with or without the NF-κB inhibitor PDTC (100 μM), the PI3K inhibitor Wortmannin (3 μg/mL), or DMSO-Control for 2 h. Total protein expression of ABCG2, PDZK1, Akt, p-Akt, and NF-κB p65 determined by western blot analysis. Protein expression normalized to that of GAPDH.

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    • Biological Activity

    • Protocol

    • Technical Information

    • Purity & Documentation

    • References

    Description

    Wortmannin is a multi-target inhibitor of PI3K and MLCK with IC50s of 3 nM and 200 nM, respectively. Wortmannin is also a potent inhibitor of DNA-PK (IC50, 16 nM) and ATM (IC50, 150 nM). Wortmannin is also a potent inhibitor of Polo-like kinase (Plk).

    IC50 & Target[1][6]

    PI3K

    3 nM (IC50)

    ATM

    150 nM (IC50)

    ATR

    1.8 μM (IC50)

    DNA-PK

    16 nM (IC50)

    Plk3

    48 nM (IC50)

    MLCK

    200 nM (IC50)

    In Vitro

    Wortmannin irreversibly inhibits phosphatidylinositol 3-kinase (PI3-kinase) activity with binding to the 110-kDa protein (IC50 of 3 nM) and has no effect PI4-kinase in RBL-2H3 cells. Wortmannin also inhibits both Fc epsilon RI-mediated histamine secretion and leukotriene release, with no effect on the activation of the tyrosine kinase Lyn[1]. In intact A549 lung adenocarcinoma cells, wortmannin inhibits both DNA-PK and ATM at concentrations that correlated closely with those required for radiosensitization. Furthermore, pretreatment of A549 cells with wortmannin results in radioresistant DNA synthesis, a characteristic abnormality of ATM-deficient cells[2]. The inhibition of MLCK by Wortmannin is not affected by calmodulin or peptide substrat, while reduced by high concentration of ATP. Wortmannin directly interacts with the catalytic domain of MLCK and leads to an irreversible loss of the enzyme activity. Wortmannin has no inhibitory to cAMP-dependent protein kinase, cGMP-dependent protein kinase, and calmodulin-dependent protein kinase II, and has little effect on protein kinase C activity[3]. Wortmannin is also a potent inhibitor of Polo-like kinase 3 (Plk3). Wortmannin potently inhibits the activity of purified Plk3 with an IC50 of 48 nM. Wortmannin is a potent inhibitor of Plk1 and AX7503, a tetramethylrhodamine-Wortmannin conjugate, is an activity-dependent probe for labeling Plk1. Wortmannin inhibits Plk1-AX7503 reactivity with a IC50 of 5.8 nM. Wortmannin inhibits Plk3 reacting with AX7503 in a dose-dependent manner. The IC50 value of Wortmannin for inhibiting labeling of Plk3 by AX7503 is determined to be 49 nM. Wortmannin covalently labels Plk1 and Plk3 by targeting conserved lysine residues in their ATP binding sites. Wortmannin inhibits Plk1 and Plk3 with a potency similar to its inhibition of PI3K. Wortmannin also inhibits Plk2 and Plk4[6].

    In Vivo

    Wortmannin inhibits phosphatidylinositide 3-kinase-protein kinase B (PKB)/Akt phosphorylation in both normal tissues (lung, heart and brain homogenates) and tumor tissue in mice, without mortality or acute toxicity at 0.7 mg/kg. Combination with LY188011, wortmannin significantly increases apoptosis and inhibits tumor growth in orthotopic tumor, while both monotherapy can not[4]. Wortmannin (1 mg/kg) inhibits peritoneal metastasis of SW1990 in mice, without any weight loss[5].

    References
    Preparing Stock Solutions
    Concentration Volume Mass 1 mg 5 mg 10 mg
    1 mM 2.3341 mL 11.6705 mL 23.3410 mL
    5 mM 0.4668 mL 2.3341 mL 4.6682 mL
    10 mM 0.2334 mL 1.1671 mL 2.3341 mL
    Please refer to the solubility information to select the appropriate solvent.
    Kinase Assay
    [3]

    MLCK activity is assayed with peptide substrate (KKRPQRATSNVFS-NH2) or myosin light chain. The peptide substrate (24 μM) is phosphorylated in a reaction mixture containing 25 mM Tris-HC1 (pH 7.5), 0.5 mg/mL bovine serum albumin, 4 mM MgCl2, 0.5 mM CaCl2, 2.6 nM calmodulin, 1.5 nM MLCK, and 400 μM ATP in a final volume of 0.25 mL. After a 10-min preincubation at 28°C without ATP, the reaction is started by addition of ATP at 28°C and terminated by the addition of 0.1 mL of 10% (v/v) acetic acid after 30 min. The mixture is analyzed by high performance liquid chromatography: column, Unisil Pack 5C18 4.6 X 150 mm; solvent, 18% (v/v) acetonitrile, 0.1% (v/v) trifluoroacetic acid in water; flow rate, 1.0 mL/min; temperature, 40°C; detection, absorbance at 220 nm. Percent of reaction is calculated from the ratio of peak areas of phosphorylated form to those of unphosphorylated form. Specific activity measured under the conditions described above is 0.81 μmol/min/mg. Myosin light chain (108 μg/mL) is phosphorylated in a reaction mixture containing 25 mM Tris-HC1 (pH 7.5), 0.5 mg/mL bovine serum albumin, 4 mM MgCl2, 0.5 mM CaCl2, 4.2 nM calmodulin, 0.92 nM enzyme, and 10 μM[γ-32P]ATP (100-900 cpm/pmol) in a final volume of 0.25 mL. After a 3-min preincubation at 30°C without ATP, the reaction is started by the addition of [γ-32P]ATP at 30°C and stopped by the addition of 0.125 mL of trichloroacetic acid after 5 min. The acid-precipitable materials are collected on a nitrocellulose membrane filter and washed with four 1-mL aliquots of 5% (v/v) trichloroacetic acid. The radioactivity on the filter is measured in a toluene scintillation fluid, using a Packard Tri-Carb liquid scintillation spectrometer Model 4530. The specific activity measured under the conditions is 1.23 μmol/min/mg. MCE has not independently confirmed the accuracy of these methods. They are for reference only.

    Animal Administration
    [5]

    Wortmannin is formulated in PBS and dimethyl sulfoxide.

    Specific pathogen-free athymic BALB/c male mice (5 weeks) are kept under sterile conditions in a laminar flow room in cages with filter bonnets and fed a sterilized mouse diet and water. In order to induce peritoneal metastasis, the mice are anesthetized by inhalation administration of sevoflurane, and SW1990 cells (1×106 cells/mouse) in 100 μL of PBS are injected into the peritoneal cavity using a 23-gauge needle after incubation without FBS for 24 h to inactivate Akt. To examine the effect of PI3K inhibitor, the mice are treated with the intraperitoneal treatment of wortmannin at 1.0, 0.5, or 0.25 mg/kg/day or vehicle (PBS + dimethyl sulfoxide) immediately after cancer cells are inoculated. The treatment is continued for 20 consecutive days. Twenty days later, mice are sacrificed and body weight, ascites, number, and total weight of peritoneal metastatic tumors are examined. The weight exceeding the mean weight of mesenterium and greater omentum of normal nude mice of the same age (in weeks) is regarded as the net weight of metastatic tumors in order to minimize the interfusion of blood or tissues. MCE has not independently confirmed the accuracy of these methods. They are for reference only.

    References
    Molecular Weight

    428.43

    Formula

    C₂₃H₂₄O₈

    CAS No.

    19545-26-7

    SMILES

    O=C1C([[email protected]@](CC2)([H])[[email protected]@]3(C)C2=O)=C([[email protected]](OC(C)=O)C3)[[email protected]]4(C)C5=C1OC=C5C(O[[email protected]@H]4COC)=O

    Storage
    Powder -20°C 3 years
      4°C 2 years
    In solvent -80°C 6 months
      -20°C 1 month
    Shipping

    Room temperature in continental US; may vary elsewhere

    Solvent & Solubility

    10 mM in DMSO

    * "<1 mg/mL" means slightly soluble or insoluble. "≥" means soluble, but saturation unknown.

    Purity: 99.65%

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    Wortmannin
    Cat. No.:
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