2. PROTAC Cell Cycle/DNA Damage
  3. DNA/RNA Synthesis PROTACs
  4. PT-129

PT-129 is an RPOTAC degrader targeting the NTF2 domain (protein-RNA interaction site) of G3BP1/2, which mediates the disassembly of intracellular stress granules. PT-129 can inhibit the formation of stress granules in stressed cells and disassemble existing stress granules, and can disrupt the transmission of ATF4, thereby inhibiting the proliferation of cancer cells. Stress granules (SGs) are membrane-less cytoplasmic compartments formed under stress stimuli. SGs promote the transmission of ATF4 from fibroblasts to tumor cells through a migratory effect, mediating fibroblast-related tumor growth. And G3BP1/2 is a central protein of the SGs network, and the inhibition of G3BP1/2 may reduce the stress resistance of cancer cells in the tumor microenvironment. PT-129 is composed of a target protein ligand (red part) G3BP1/2-Targeting ligand-1 (HY-170873), an E3 ligase ligand (blue part) Thalidomide 4-fluoride (HY-41547), and a PROTAC linker (black part) Amino-PEG3-C2-acid (HY-W040165); among them, the E3 ligase ligand + linker form a complex Thalidomide-NH-PEG3-propionic acid (HY-136166).

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

PT-129 Chemical Structure

PT-129 Chemical Structure

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Based on 1 publication(s) in Google Scholar

PT-129 Related Antibodies

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von Hippel-Lindau (VHL) Cereblon MDM2 cIAP1

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Description

PT-129 is an RPOTAC degrader targeting the NTF2 domain (protein-RNA interaction site) of G3BP1/2, which mediates the disassembly of intracellular stress granules. PT-129 can inhibit the formation of stress granules in stressed cells and disassemble existing stress granules, and can disrupt the transmission of ATF4, thereby inhibiting the proliferation of cancer cells. Stress granules (SGs) are membrane-less cytoplasmic compartments formed under stress stimuli. SGs promote the transmission of ATF4 from fibroblasts to tumor cells through a migratory effect, mediating fibroblast-related tumor growth. And G3BP1/2 is a central protein of the SGs network, and the inhibition of G3BP1/2 may reduce the stress resistance of cancer cells in the tumor microenvironment. PT-129 is composed of a target protein ligand (red part) G3BP1/2-Targeting ligand-1 (HY-170873), an E3 ligase ligand (blue part) Thalidomide 4-fluoride (HY-41547), and a PROTAC linker (black part) Amino-PEG3-C2-acid (HY-W040165); among them, the E3 ligase ligand + linker form a complex Thalidomide-NH-PEG3-propionic acid (HY-136166)[1].

IC50 & Target

G3BP1/2, ATF4[1]
Molecular Weight

936.98

Formula

C46H48N8O12S
Appearance

Solid

Color

Light yellow to yellow

SMILES

O=C(NC1=CC=C(NC(CCOCCOCCOCCNC2=CC=CC(C(N3C(CC4)C(NC4=O)=O)=O)=C2C3=O)=O)C=C1)[C@@H](NS(=O)(CC(N5N=CC6=C5C=CC=C6)=O)=O)CC7=CC=CC=C7
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 : 100 mg/mL (106.73 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 1.0673 mL 5.3363 mL 10.6726 mL
5 mM 0.2135 mL 1.0673 mL 2.1345 mL
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
=
Concentration
×
Volume
×
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: ≥ 2.5 mg/mL (2.67 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 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% Corn Oil

    Solubility: ≥ 2.5 mg/mL (2.67 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown). If the continuous dosing period exceeds half a month, please choose this protocol carefully.

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 900 μL Corn oil, and mix evenly.

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
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 1.0673 mL 5.3363 mL 10.6726 mL 26.6815 mL
5 mM 0.2135 mL 1.0673 mL 2.1345 mL 5.3363 mL
10 mM 0.1067 mL 0.5336 mL 1.0673 mL 2.6681 mL
15 mM 0.0712 mL 0.3558 mL 0.7115 mL 1.7788 mL
20 mM 0.0534 mL 0.2668 mL 0.5336 mL 1.3341 mL
25 mM 0.0427 mL 0.2135 mL 0.4269 mL 1.0673 mL
30 mM 0.0356 mL 0.1779 mL 0.3558 mL 0.8894 mL
40 mM 0.0267 mL 0.1334 mL 0.2668 mL 0.6670 mL
50 mM 0.0213 mL 0.1067 mL 0.2135 mL 0.5336 mL
60 mM 0.0178 mL 0.0889 mL 0.1779 mL 0.4447 mL
80 mM 0.0133 mL 0.0667 mL 0.1334 mL 0.3335 mL
100 mM 0.0107 mL 0.0534 mL 0.1067 mL 0.2668 mL
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PT-129 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:

PT-129PT129PT 129DNA/RNA SynthesisPROTACsInhibitorinhibitorinhibit

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