2. Cell Cycle/DNA Damage
  3. RAD51
  4. RI-1

RI-1 is a RAD51 inhibitor, with IC50s ranging from 5 to 30 μM. RI-1 binds covalently to the surface of RAD51 protein at cysteine 319. RI-1 inactivates RAD51 by directly binding to a protein surface that serves as an interface between protein subunits in RAD51 filaments. RI-1 can disrupt homologous recombination in human cells.

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

RI-1 Chemical Structure

RI-1 Chemical Structure

CAS No. : 415713-60-9

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Solid + Solvent (Highly Recommended)
10 mM * 1 mL in DMSO
ready for reconstitution
 USD 83 In-stock
Solution
10 mM * 1 mL in DMSO USD 83 In-stock
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Based on 5 publication(s) in Google Scholar

RI-1 Related Antibodies

Top Publications Citing Use of Products

  • Biological Activity

  • Purity & Documentation

  • References

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Description

RI-1 is a RAD51 inhibitor, with IC50s ranging from 5 to 30 μM. RI-1 binds covalently to the surface of RAD51 protein at cysteine 319. RI-1 inactivates RAD51 by directly binding to a protein surface that serves as an interface between protein subunits in RAD51 filaments. RI-1 can disrupt homologous recombination in human cells[1].

IC50 & Target

IC50: 5-30 μM (RAD51)[1]
In Vitro

RI-1 (1-50 μM; 24 h) specifically inhibits homologous recombination (HR) in U2OS cells and stimulates single-strand annealing (SSA) in HEK293 cells[1].
? RI-1 (5-20 μM; 30 min) inhibits HsRAD51 in a concentration-dependent manner[1].
? RI-1 (20 μM; 8 h) disrupts the formation of RAD51 foci after DNA damage in immortalized human fibroblasts[1].
? RI-1 (15-25 μM; 24 h) sensitizes human cancer cells (HeLa, MCF-7 and U2OS) to cross-linking chemotherapy[1].

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

RI-1 Related Antibodies
In Vivo

RI-1 (50 mg/kg; i.p. every 3 d for 30 d) significantly reduces triple negative breast cancer (TNBC) tumor growth in mice[2].

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

Animal Model: Female BALB/c nude mice (6 weeks) bearing TNBC tumor[2]
Dosage: 50 mg/kg
Administration: I.p. every 3 days for 30 days
Result: Resulted in significant inhibition of tumor growth.
Did not cause body weight loss significantly.
Molecular Weight

361.61

Formula

C14H11Cl3N2O3
CAS No.
Appearance

Solid

Color

Yellow to orange

SMILES

O=C(C(N1CCOCC1)=C2Cl)N(C3=CC=C(Cl)C(Cl)=C3)C2=O
Shipping

Room temperature in continental US; may vary elsewhere.
Storage
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 6 months
-20°C 1 month
Solvent & Solubility
In Vitro: 

DMSO : 33.33 mg/mL (92.17 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 2.7654 mL 13.8271 mL 27.6541 mL
5 mM 0.5531 mL 2.7654 mL 5.5308 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    90% Corn Oil

    Solubility: ≥ 2.5 mg/mL (6.91 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

Purity: 99.83%

SDS (393 KB)

COA (257 KB) LCMS (112 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 2.7654 mL 13.8271 mL 27.6541 mL 69.1353 mL
5 mM 0.5531 mL 2.7654 mL 5.5308 mL 13.8271 mL
10 mM 0.2765 mL 1.3827 mL 2.7654 mL 6.9135 mL
15 mM 0.1844 mL 0.9218 mL 1.8436 mL 4.6090 mL
20 mM 0.1383 mL 0.6914 mL 1.3827 mL 3.4568 mL
25 mM 0.1106 mL 0.5531 mL 1.1062 mL 2.7654 mL
30 mM 0.0922 mL 0.4609 mL 0.9218 mL 2.3045 mL
40 mM 0.0691 mL 0.3457 mL 0.6914 mL 1.7284 mL
50 mM 0.0553 mL 0.2765 mL 0.5531 mL 1.3827 mL
60 mM 0.0461 mL 0.2305 mL 0.4609 mL 1.1523 mL
80 mM 0.0346 mL 0.1728 mL 0.3457 mL 0.8642 mL
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RI-1 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:

RI-1415713-60-9RI1RI 1RAD51homologousrecombinationInhibitorinhibitorinhibit

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