2. Membrane Transporter/Ion Channel
  3. Potassium Channel
  4. ML402

ML402, a thiophene-carboxamide, is a selective K2P2.1(TREK-1) and K2P10.1(TREK-2) activator. ML402 is inactive against K2P4.1(TRAAK).

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ML402 Chemical Structure

ML402 Chemical Structure

CAS No. : 298684-44-3

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Solid + Solvent
10 mM * 1 mL in DMSO
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Based on 1 publication(s) in Google Scholar

ML402 Related Antibodies

Top Publications Citing Use of Products

  • Biological Activity

  • Protocol

  • Purity & Documentation

  • References

  • Customer Review

Description

ML402, a thiophene-carboxamide, is a selective K2P2.1(TREK-1) and K2P10.1(TREK-2) activator. ML402 is inactive against K2P4.1(TRAAK)[1].

IC50 & Target

TREK-1/2[1]
In Vitro

Xenopus oocyte two-electrode voltage-clamp measurements show that ML335 and ML402 activate K2P2.1 and K2P10.1 but not K2P4.1(14.3±2.7 μM, K2P2.1-ML335; 13.7±7.0 μM, K2P2.1-ML402; 5.2±0.5 μM, K2P10.1-ML335; and 5.9±1.6 μM, K2P10.1-ML402). The K2P modulator pocket has a single difference among TREK subfamily members at the cation-π interaction position, K2P2.1 Lys271, which is also a lysine in K2P10.1 but a glutamine in K2P4.1. Swapping the Lys271 equivalent between K2P2.1 and K2P4.1 results in a clear phenotype reversal for ML335 and M402 activation. K2P2.1 (K271Q) is insensitive to ML335 and ML402, whereas K2P4.1 (Q258K) responds to both with a similar EC50 to K2P2.1 (14.3±2.7 μM, K2P2.1-ML335; 16.2±3.0 μM, K2P4.1(Q258K)-ML335; 13.7±7.0 μM, K2P2.1-ML402; 13.6±1.5 μM, K2P4.1 (Q258K)-ML402) but with a lower magnitude response than K2P2.1[1].

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

ML402 Related Antibodies
Molecular Weight

295.78

Formula

C14H14ClNO2S
CAS No.
Appearance

Solid

Color

White to off-white

SMILES

O=C(C1=CC=CS1)NCCOC2=CC=C(Cl)C=C2C
Shipping

Room temperature in continental US; may vary elsewhere.
Storage
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 2 years
-20°C 1 year
Solvent & Solubility
In Vitro: 

DMSO : ≥ 100 mg/mL (338.09 mM; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

*"≥" means soluble, but saturation unknown.

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 3.3809 mL 16.9045 mL 33.8089 mL
5 mM 0.6762 mL 3.3809 mL 6.7618 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, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

  • 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 (8.45 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 (8.45 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
Kinase Assay
[1]

K2P2.1cryst ML335 and ML402 complex crystals grow in the same conditions as K2P2.1cryst, but the protein is incubated for at least 1 h with 2.5 mM of activator (including ML 402) before setting the crystal plates. ML335 and ML402 are insoluble in aqueous solutions, so they are dissolved in 100% DMSO at a concentration of 500 mM. Then each compound is diluted 1:100 in SEC buffer to 5 mM concentration, giving a milky solution. This solution is mixed 1:1 to K2P2.1cryst previously concentrating to 12 mg/mL. The K2P2.1cryst ML402 mixture results in a clear solution, while the mixture with ML335 is slightly milky. The samples are briefly centrifuged in a table-top centrifuge (10,000×g) to remove any insoluble material before setting the crystal plates. Dose-response experiments are carried by first preparing a DMSO stock solution of each activator (including ML402) at a concentration of 100 mM. Owing to the low solubility of the compounds the highest test concentrations in recording solution are 100 μM and 80 μM for ML335 and ML402, respectively. Other concentrations are prepared by serial dilutions of the 100 μM solution in recording buffer supplementing with 0.1% DMSO[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.
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, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
DMSO 1 mM 3.3809 mL 16.9045 mL 33.8089 mL 84.5223 mL
5 mM 0.6762 mL 3.3809 mL 6.7618 mL 16.9045 mL
10 mM 0.3381 mL 1.6904 mL 3.3809 mL 8.4522 mL
15 mM 0.2254 mL 1.1270 mL 2.2539 mL 5.6348 mL
20 mM 0.1690 mL 0.8452 mL 1.6904 mL 4.2261 mL
25 mM 0.1352 mL 0.6762 mL 1.3524 mL 3.3809 mL
30 mM 0.1127 mL 0.5635 mL 1.1270 mL 2.8174 mL
40 mM 0.0845 mL 0.4226 mL 0.8452 mL 2.1131 mL
50 mM 0.0676 mL 0.3381 mL 0.6762 mL 1.6904 mL
60 mM 0.0563 mL 0.2817 mL 0.5635 mL 1.4087 mL
80 mM 0.0423 mL 0.2113 mL 0.4226 mL 1.0565 mL
100 mM 0.0338 mL 0.1690 mL 0.3381 mL 0.8452 mL
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ML402 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:

ML402298684-44-3ML 402ML-402Potassium ChannelKcsAInhibitorinhibitorinhibit

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