Cysteine thiol probe

Name: Cysteine thiol probe
Brand: MedChemExpress
SKU: HY-135235
Rating: 4.5 (1 reviews)

Cat. No.: HY-135235 Purity: 98.14%: FAQs
Data Sheet SDS COA Handling Instructions

Molarity Calculator

Cysteine Thiol Probe is a thiol-based probe designed to label electrophilic natural products. Cysteine Thiol Probe possesses each of the characteristics of an ideal pharmacophore probe, and has a chromophore. Cysteine Thiol Probe is capable of engaging enone-, β-lactam-, and β-lactone-based electrophilic metabolites.

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

Cysteine thiol probe Chemical Structure

CAS No. : 1947408-74-3

Size	Price	Stock	Quantity
Solid + Solvent (Highly Recommended)
10 mM * 1 mL in DMSO ready for reconstitution	USD 99	In-stock	Estimated Time of Arrival: December 31
Solution
10 mM * 1 mL in DMSO	USD 99	In-stock	Estimated Time of Arrival: December 31
Solid
5 mg	USD 90	In-stock	Estimated Time of Arrival: December 31
10 mg	USD 150	In-stock	Estimated Time of Arrival: December 31
50 mg	USD 450	In-stock	Estimated Time of Arrival: December 31
100 mg	USD 750	In-stock	Estimated Time of Arrival: December 31
200 mg		Get quote
500 mg		Get quote

or Bulk Inquiry

* Please select Quantity before adding items.

This product is a controlled substance and not for sale in your territory.

Customer Review

Based on 1 publication(s) in Google Scholar

Featured Recommendations

•Related Small Molecules:

•Related Proteins:

Biological Activity
Purity & Documentation
References
Customer Review

Description

In Vitro

Cysteine Thiol Probe (Probe 1) reacts much more readily with β-lactam- and β-lactone-based electrophilic natural products, and its reactivity with epoxide-based electrophilic natural products is poor. And probe 2 reacts much faster with epoxide-containing natural products. This orthogonal reactivity allows them to be employed in extracts simultaneously. Since Cysteine Thiol Probe is brominated and probe 2 is chlorinated, the isotopic patterns of labeled natural products point toward their structural origin. Competition experiments using Cysteine Thiol Probe and 2 indicated that brominated Cysteine Thiol Probe reacted exclusively with the β-lactam in penicillin G and the β-lactone in salinosporamide A while chlorinated probe 2 alone reacted with the epoxide in salinamide A^[1].

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

Molecular Weight

318.19

Formula

C₁₁H₁₂BrNO₃S

CAS No.

1947408-74-3

Appearance

Solid

Color

White to off-white

SMILES

SC[C@@H](C(OC)=O)NC(C1=CC=C(Br)C=C1)=O

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 : 250 mg/mL (785.69 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	3.1428 mL	15.7139 mL	31.4278 mL
5 mM	0.6286 mL	3.1428 mL	6.2856 mL
10 mM	0.3143 mL	1.5714 mL	3.1428 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)

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

This equation is commonly abbreviated as: C₁V₁ = C₂V₂

Concentration _(start)

Volume _(start)

Concentration _(final)

Volume _(final)

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: ≥ 2.08 mg/mL (6.54 mM); Clear solution

This protocol yields a clear solution of ≥ 2.08 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (20.8 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: ≥ 2.08 mg/mL (6.54 mM); Clear solution

This protocol yields a clear solution of ≥ 2.08 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 (20.8 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)

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: 98.14%

Select Batch:

Data Sheet (272 KB) SDS (251 KB)

COA (246 KB) LCMS (98 KB)

Handling Instructions (2659 KB)

References

[1]. Castro-Falcón G, et al. Thiol Probes To Detect Electrophilic Natural Products Based on Their Mechanism of Action. ACS Chem Biol. 2016 Aug 19;11(8):2328-36. [Content Brief]

[2]. Reimer D, et al. Thiol-Based Probe for Electrophilic Natural Products Reveals That Most of the Ammosamides Are Artifacts. J Nat Prod. 2017 Jan 27;80(1):126-133. [Content Brief]

Complete Stock Solution Preparation Table

Optional Solvent	Concentration Solvent Mass	1 mg	5 mg	10 mg	25 mg

DMSO	1 mM	3.1428 mL	15.7139 mL	31.4278 mL	78.5694 mL
	5 mM	0.6286 mL	3.1428 mL	6.2856 mL	15.7139 mL
	10 mM	0.3143 mL	1.5714 mL	3.1428 mL	7.8569 mL
	15 mM	0.2095 mL	1.0476 mL	2.0952 mL	5.2380 mL
	20 mM	0.1571 mL	0.7857 mL	1.5714 mL	3.9285 mL
	25 mM	0.1257 mL	0.6286 mL	1.2571 mL	3.1428 mL
	30 mM	0.1048 mL	0.5238 mL	1.0476 mL	2.6190 mL
	40 mM	0.0786 mL	0.3928 mL	0.7857 mL	1.9642 mL
	50 mM	0.0629 mL	0.3143 mL	0.6286 mL	1.5714 mL
	60 mM	0.0524 mL	0.2619 mL	0.5238 mL	1.3095 mL
	80 mM	0.0393 mL	0.1964 mL	0.3928 mL	0.9821 mL
	100 mM	0.0314 mL	0.1571 mL	0.3143 mL	0.7857 mL