TG003

Catalog No.S7320 Batch:S732001

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Technical Data

Formula

C13H15NO2S
Molecular Weight 249.33 CAS No. 300801-52-9
Solubility (25°C)* In vitro DMSO 50 mg/mL (200.53 mM)
Ethanol 50 mg/mL (200.53 mM)
Water Insoluble
In vivo (Add solvents to the product individually and in order)
Clear solution
5%DMSO Corn oil
3.0mg/ml Taking the 1 mL working solution as an example, add 50 μL of 60 mg/ml clear DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results. 
* <1 mg/ml means slightly soluble or insoluble.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
* Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

Preparing Stock Solutions

Biological Activity

Description TG003 is a potent and ATP-competitive Cdc2-like kinase (Clk) inhibitor with IC50 of 20 nM, 200 nM, and 15 nM for Clk1, Clk2, and Clk4, respectively. No inhibitory effect on Clk3, SRPK1, SRPK2, or PKC.
Targets
mCLK4 [1]
(Cell-free assay)		 mCLK1 [1]
(Cell-free assay)		 mCLK2 [1]
(Cell-free assay)
15 nM 20 nM 200 nM
In vitro TG003 inhibits SF2/ASF-dependent splicing of human β-globin in vitro by suppression of Clk1/Sty-mediated phosphorylation. TG003 inhibits Clk1/Sty kinase activity in mammalian cells, while has no toxic effect on growth of HeLa and COS-7 cells at 10 μM concentration. [1] TG003 blocks IL-1β RNA production by platelets by inhibiting splicing of IL-1β heteronuclear RNA. [2] During 3T3-L1 adipocyte differentiation, TG003 also blocks alternative splicing of PKCβII and expression of PPARγ1 and PPARγ2. [3]
In vivo TG003 (10 μM) rescues the embryonic defects induced by excessive Clk activity in Xenopus. [1]

Protocol (from reference)

Kinase Assay:

[1]
  • In Vitro Kinase Assay

    Kinase activity of Clks and SRPKs is assayed in a reaction mixture, containing 200 mM Tris-HCl (pH 7.5), 12.5 mM MgCl2, 8 mM dithiothreitol, 4 mM EGTA, 1–20 μM ATP, 1 μCi of [γ-32P]ATP, 1 μg of synthetic peptide of SF2/ASF RS domain (NH2-RSPSYGRSRSRSRSRSRSRSRSNSRSRSY-OH), and 0.1–1 μg of purified kinases in a final volume of 40 μL. cAMP-dependent protein kinase activity is assayed in a reaction mixture containing 80 mM Tris-HCl (pH 7.5), 12.5 mM MgCl2, 8 mM dithiothreitol, 4 mM EGTA, 10 μM ATP, 1 μCi of [γ-32P]ATP, 5 μg of histone H1, and 1 μg of catalytic subunit of rat cAMP-dependent protein kinase purified. Protein kinase C activity is assayed in a reaction mixture containing 200 mM Tris-HCl (pH 7.5), 12.5 mM MgCl2, 1 mM CaCl2, 80 μg/mL phosphatidylserine, 8 μg/mL diolein, 10 μM ATP, 1 μCi of [γ-32P]ATP, 5 μg of histone H1, and 2 μL of partially purified rat protein kinase C. The final concentration of Me2SO is adjusted to 1% regardless of inhibitor concentration. The reaction mixture is incubated at 30 or 25 °C for mammalian or Xenopus recombinant proteins, respectively, for 10 min, and a half-portion is spotted on P81 phosphocellulose membrane. The kinase assay conditions, including the incubation period and concentration of kinases and substrates, are optimized to maintain the linearity during incubation. The membrane is washed with 5% phosphoric acid solution (SF2/ASF RS domain) or 5% trichloroacetic solution (histone H1) at least over 15 min. The radioactivity is measured using a liquid scintillation counter. The net radioactivity is deduced by subtracting the background count from the reaction mixture without kinase, and the data are expressed as the percentage to the control sample containing the solvent.
Cell Assay:

[1]
  • Cell lines

    HeLa cells and COS-7 cells

  • Concentrations

    ~10 μM

  • Incubation Time

    3 days

  • Method

    2 × 105 HeLa cells or 1.5 × 105 COS-7 cells resuspended in 2 mL of medium are plated on 6-well dishes, and 2 μL of 10 mM TG003 dissolved in Me2SO (final concentration at 10 μM), or 2 μL of Me2SO, is added to some wells. Cells are trypsinized, and the density is counted every 24 h for 3 days. Cells are then fixed with 1 mL of ice-cold 70% ethanol, washed with PBS, incubated in 1 ml of PBS containing 1 μg/mL DNase-free RNase A and 50 μg/mL propidium iodide for 20 min at 37 °C, and proceeded to cell cycle analysis by FACSCalibur.
Animal Study:

[1]
  • Animal Models

    Xenopus laevis embryos

  • Dosages

    ~10 μM

  • Administration

    --

Selleck's TG003 has been cited by 7 publications

A common cellular response to broad splicing perturbations is characterized by metabolic transcript downregulation driven by the Mdm2-p53 axis [ Dis Model Mech, 2024, 17(2)dmm050356] PubMed: 38426258
The Spliceosome: A New Therapeutic Target in Chronic Myeloid Leukaemia [ Cancers (Basel), 2022, 14(19)4695] PubMed: 36230624
Proteasome Inhibitor-Induced Modulation Reveals the Spliceosome as a Specific Therapeutic Vulnerability in Multiple Myeloma [ Nat Commun, 2020, 22;11(1):1931] PubMed: 32321912
Actionable Cytopathogenic Host Responses of Human Alveolar Type 2 Cells to SARS-CoV-2 [ Mol Cell, 2020, 80(6):1104-1122.e9] PubMed: 33259812
Phosphoproteomic analysis identifies CLK1 as a novel therapeutic target in gastric cancer. [ Gastric Cancer, 2020, 24] PubMed: 32333232
Integrated phosphoproteomics and transcriptional classifiers reveal hidden RAS signaling dynamics in multiple myeloma. [ Blood Adv, 2019, 3(21):3214-3227] PubMed: 31698452
Chemically defined and growth-factor-free culture system for the expansion and derivation of human pluripotent stem cells. [ Nat Biomed Eng, 2018, 2(3):173-182] PubMed: 31015717

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SHIPPING AND STORAGE
Selleck products are transported at room temperature. If you receive the product at room temperature, please rest assured, the Selleck Quality Inspection Department has conducted experiments to verify that the normal temperature placement of one month will not affect the biological activity of powder products. After collecting, please store the product according to the requirements described in the datasheet. Most Selleck products are stable under the recommended conditions.

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