2. PI3K/Akt/mTOR Anti-infection
  3. PI4K HCV
  4. GSK-A1

GSK-A1 is a selective type III phosphatidylinositol 4-kinase PI4KA (PI4KIIIα) inhibitor with a pIC50 of 8.5-9.8. GSK-A1 inhibits PtdIns(4,5)P2 resynthesis with an IC50 of about 3 nM. GSK-A1 potently decreases the levels of PtdIns(4)P with a negligible effect on PtdIns(4,5)P2. GSK-A1 has the potential for anti-hepatitis C virus (HCV) research.

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

CAS No. : 1416334-69-4

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Based on 2 publication(s) in Google Scholar

GSK-A1 Related Antibodies

Top Publications Citing Use of Products

    GSK-A1 purchased from MedChemExpress. Usage Cited in: Curr Biol. 2025 Apr 7;35(7):1612-1621.e3.  [Abstract]

    Injection of either the vehicle the PI4Kα inhibitor GSK-A1 (30 μM) into embryos expressing PH-mCherry. The plasma membrane signal levels are comparable immediately after injection (NC5). By NC9/budding in GSK-A1 injected embryos, PH-mCherry is lost from the cortex.

    GSK-A1 purchased from MedChemExpress. Usage Cited in: Curr Biol. 2025 Apr 7;35(7):1612-1621.e3.  [Abstract]

    Injection of the PI4Kα inhibitor GSK-A1 (30 μM) into embryos expressing GFP-MoeABD. Scale bars: 10 μm. The results showed that PI4Kα inhibition disrupted F-actin dynamics at the posterior.

    GSK-A1 purchased from MedChemExpress. Usage Cited in: bioRxiv. 2025 Jul 31:2025.07.31.667950.  [Abstract]

    Quantification of normalized F-actin intensity over time after treatment with DMSO or PI4KIIIɑ inhibitor (GSK-A1) (60 μM; 10 min). Mean (solid line)) ± standard deviation (SD, shading) is shown. For both n = 3 videos from 3 extract preps on 2 experimental days.

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    PI4KIIIβ PI4KIIIα PI4K PI4KII

    • Biological Activity

    • Purity & Documentation

    • References

    • Customer Review

    Description

    GSK-A1 is a selective type III phosphatidylinositol 4-kinase PI4KA (PI4KIIIα) inhibitor with a pIC50 of 8.5-9.8. GSK-A1 inhibits PtdIns(4,5)P2 resynthesis with an IC50 of about 3 nM. GSK-A1 potently decreases the levels of PtdIns(4)P with a negligible effect on PtdIns(4,5)P2. GSK-A1 has the potential for anti-hepatitis C virus (HCV) research[1].

    IC50 & Target[1]

    PI4KA

    8.5-9.8 (pIC50)

    PI4KB

    7.2-7.7 (pIC50)

    PI4K2A

    <5 (pIC50)

    PI4K2B

    <5 (pIC50)

    In Vitro

    GSK-A1 (100 nM, 30 min) reduces HSPA1A localization at the plasma membrane in HeLa cells[2].
    GSK-A1 (0-8 μM, 48 h) enhances Doxorubicin (HY-15142A) efficacy in resistant leukemia cells (K562/Adr and HL-60/Adr cells)[3].
    GSK-A1 (0-50 nM) stimulates phosphorylation of LATS and YAP in HEK293A cells[4].

    MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

    GSK-A1 Related Antibodies
    Molecular Weight

    574.63

    Formula

    C29H27FN6O4S
    CAS No.
    Appearance

    Solid

    Color

    White to off-white

    SMILES

    O=S(C1=CC(C2=CC=C3N=C(N)N(C4=CC=C(N5CCOCC5)C=C4)C3=C2)=CN=C1OC)(NC6=CC=CC=C6F)=O
    Shipping

    Room temperature in continental US; may vary elsewhere.
    Storage
    Powder -20°C 3 years
    In solvent -80°C 6 months
    -20°C 1 month
    Solvent & Solubility
    In Vitro: 

    DMSO : ≥ 2 mg/mL (3.48 mM; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

    H2O : < 0.1 mg/mL (insoluble)

    *"≥" means soluble, but saturation unknown.

    Preparing
    Stock Solutions
    Concentration Solvent Mass 1 mg 5 mg 10 mg
    1 mM 1.7403 mL 8.7013 mL 17.4025 mL
    5 mM --- --- ---
    View the Complete Stock Solution Preparation Table

    * Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
    Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

    • Molarity Calculator

    • Dilution Calculator

    Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

    Mass
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    Concentration
    ×
    Volume
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    Molecular Weight *

    Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

    This equation is commonly abbreviated as: C1V1 = C2V2

    Concentration (start)

    C1

    ×
    Volume (start)

    V1

    =
    Concentration (final)

    C2

    ×
    Volume (final)

    V2

    In Vivo:

    Select the appropriate dissolution method based on your experimental animal and administration route.

    For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
    To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for in vivo experiments, it is recommended to prepare freshly and use it on the same day.
    The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

    • Protocol 1

      Add each solvent one by one:  10% DMSO    40% PEG300    5% Tween-80    45% Saline

      Solubility: ≥ 0.2 mg/mL (0.35 mM); Clear solution

      This protocol yields a clear solution of ≥ 0.2 mg/mL (saturation unknown).

      Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (2.0 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.

      Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
    • Protocol 2

      Add each solvent one by one:  10% DMSO    90% (20% SBE-β-CD in Saline)

      Solubility: ≥ 0.2 mg/mL (0.35 mM); Clear solution

      This protocol yields a clear solution of ≥ 0.2 mg/mL (saturation unknown).

      Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (2.0 mg/mL) to 900 μL 20% SBE-β-CD in Saline, and mix evenly.

      Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.
    In Vivo Dissolution Calculator
    Please enter the basic information of animal experiments:

    Dosage

    mg/kg

    Animal weight
    (per animal)

    g

    Dosing volume
    (per animal)

    μL

    Number of animals

    Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
    Please enter your animal formula composition:
    %
    DMSO +
    % 
    +
    %
    Tween-80 +
    %
    Saline
    Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
    The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
    Calculation results:
    Working solution concentration: mg/mL
    Method for preparing stock solution: mg drug dissolved in μL  DMSO (Stock solution concentration: mg/mL).
    The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only. If necessary, please contact MedChemExpress (MCE).
    Method for preparing in vivo working solution for animal experiments: Take μL DMSO stock solution, add μL . μL , mix evenly, next add μL Tween 80, mix evenly, then add μL Saline.
     If the continuous dosing period exceeds half a month, please choose this protocol carefully.
    Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
    Purity & Documentation

    Purity: 99.04%

    SDS (251 KB)

    COA (254 KB) HNMR (142 KB) RP-HPLC (259 KB) MS (152 KB)

    Handling Instructions (2659 KB)
    References

    Complete Stock Solution Preparation Table

    * Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
    Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

    Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
    DMSO 1 mM 1.7403 mL 8.7013 mL 17.4025 mL 43.5063 mL
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    • Your name will appear on the site.

    GSK-A1 Related Classifications

    Help & FAQs
    • Do most proteins show cross-species activity?

      Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

    Keywords:

    GSK-A11416334-69-4PI4KHCVPhosphatidylinositol 4 kinasesPI4 kinasesHepatitis C virusphosphatidylinositol 4-kinase PI4KAPI4KIIIαPtdIns(4,5)P2PtdIns(4)Phepatitis C virusInhibitorinhibitorinhibit

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