Rbin-1 (Ribozinoindole-1)

Alias: Ribozinoindole-1; Rbin-1
Cat No.:V2568 Purity: ≥98%
Rbin-1 (also known as ribozinoindole-1) is a potent and specific chemical inhibitor of eukaryotic ribosome assembly.
Rbin-1 (Ribozinoindole-1) Chemical Structure CAS No.: 328023-11-6
Product category: PARP
This product is for research use only, not for human use. We do not sell to patients.
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Purity & Quality Control Documentation

Purity: ≥98%

Product Description

Rbin-1 (also known as ribozinoindole-1) is a potent and specific chemical inhibitor of eukaryotic ribosome assembly. It blocks the ATPase activity of recombinant full-length Mdn1 in vitro. In order to investigate the mechanism of action of Rbin-1, resistant clones that were able to proliferate in the presence of Rbin-1 were isolated from MDR-sup fission yeast cells through chemical mutagenization. The mdn1 gene contained one of five distinct point mutations, according to the results, in each of the 13 Rbin-1 resistant clones.

Biological Activity I Assay Protocols (From Reference)
Targets
ATPase ( GI50 = 136±7 nM )
ln Vitro

In vitro activity: Rbin-1 is a potent and reversible inhibitor of eukaryotic ribosome biogenesis based on triazinoindole. Rbin-1 blocks the ATPase activity of recombinant full-length Mdn1. Rbin-1 and Rbin-2, two of the active analogs, reduce ATPase activity by 40% at 1 uM. Specifically, Rbin-2, which has a bromine substituent at position-7, exhibits a 10-fold increase in activity compared to Rbin-1 (GI50 = 14±1 nM (Rbin-2); 136±7 nM (Rbin-1), n = 4, mean±SD)[1].

ln Vivo

Enzyme Assay
Depending on the radioactive reagent's lifetime, volume ratios of 1:1000–1:300 are used when adding radioactive γ-P32-ATP to 600 mM MgATP (pH=7) solutions. The total volume of each reaction is 12 mL, which includes 4 mL of FPLC SEC buffer with 0.6 mM Na2SO4 and 2 mL of MgATP (final concentration=100 mM), 6 ml of protein from size exclusion chromatography fractions (final concentration 0-50 nM for different fractions, peak fractions are used for Rbin-1 and AMPPNP inhibition). Following a 30- to 60-minute incubation period at room temperature, the reactions are quenched with 12 mL of 0.2 M EDTA. On TLC PEI cellulose F plates, 1 mL of each reaction mixture is spotted. Formic acid (0.15 M) and lithium chloride (0.15 M) were present in the TLC buffer. Following that, the Typhoon Scanner 9400 is used to image the TLC plates. Utilizing ImageJ, compute the densitometric ratio between the spots that represent radioactive free phosphate and ATP to ascertain the percentage of ATP that has been hydrolyzed[1].
Cell Assay
Enzymatic ribosome assembly is strongly inhibited by ribozinoindoles. Mdn1 or the cellular processes that use this protein are the target of Rbin-1. It successfully prevents yeast cells from growing.
Animal Protocol


References

[1]. Potent, Reversible, and Specific Chemical Inhibitors of Eukaryotic Ribosome Biogenesis. Cell. 2016 Oct 6;167(2):512-524.e14.

These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C13H12N4S
Molecular Weight
256.33
Exact Mass
256.08
Elemental Analysis
C, 60.92; H, 4.72; N, 21.86; S, 12.51
CAS #
328023-11-6
Related CAS #
328023-11-6
Appearance
Solid powder
SMILES
CC(=C)CSC1=NC2=C(C3=CC=CC=C3N2)N=N1
InChi Key
LPCWHNSRTRBKBO-UHFFFAOYSA-N
InChi Code
InChI=1S/C13H12N4S/c1-8(2)7-18-13-15-12-11(16-17-13)9-5-3-4-6-10(9)14-12/h3-6H,1,7H2,2H3,(H,14,15,17)
Chemical Name
3-(2-methylprop-2-enylsulfanyl)-5H-[1,2,4]triazino[5,6-b]indole
Synonyms
Ribozinoindole-1; Rbin-1
HS Tariff Code
2934.99.9001
Storage

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Shipping Condition
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
Solubility Data
Solubility (In Vitro)
DMSO: 19.5~39 mg/mL (76.1~152.1 mM)
Water: <1 mg/mL
Ethanol: <1 mg/mL
Solubility (In Vivo)
Solubility in Formulation 1: 1.67 mg/mL (6.52 mM) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), suspension solution; with sonication.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 16.7 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL.
Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution.

Solubility in Formulation 2: ≥ 1.67 mg/mL (6.52 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 16.7 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly.

 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 3.9012 mL 19.5061 mL 39.0122 mL
5 mM 0.7802 mL 3.9012 mL 7.8024 mL
10 mM 0.3901 mL 1.9506 mL 3.9012 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.

Calculator

Molarity Calculator allows you to calculate the mass, volume, and/or concentration required for a solution, as detailed below:

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An example of molarity calculation using the molarity calculator is shown below:
What is the mass of compound required to make a 10 mM stock solution in 5 ml of DMSO given that the molecular weight of the compound is 350.26 g/mol?
  • Enter 350.26 in the Molecular Weight (MW) box
  • Enter 10 in the Concentration box and choose the correct unit (mM)
  • Enter 5 in the Volume box and choose the correct unit (mL)
  • Click the “Calculate” button
  • The answer of 17.513 mg appears in the Mass box. In a similar way, you may calculate the volume and concentration.

Dilution Calculator allows you to calculate how to dilute a stock solution of known concentrations. For example, you may Enter C1, C2 & V2 to calculate V1, as detailed below:

What volume of a given 10 mM stock solution is required to make 25 ml of a 25 μM solution?
Using the equation C1V1 = C2V2, where C1=10 mM, C2=25 μM, V2=25 ml and V1 is the unknown:
  • Enter 10 into the Concentration (Start) box and choose the correct unit (mM)
  • Enter 25 into the Concentration (End) box and select the correct unit (mM)
  • Enter 25 into the Volume (End) box and choose the correct unit (mL)
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  • The answer of 62.5 μL (0.1 ml) appears in the Volume (Start) box
g/mol

Molecular Weight Calculator allows you to calculate the molar mass and elemental composition of a compound, as detailed below:

Note: Chemical formula is case sensitive: C12H18N3O4  c12h18n3o4
Instructions to calculate molar mass (molecular weight) of a chemical compound:
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Definitions of molecular mass, molecular weight, molar mass and molar weight:
  • Molecular mass (or molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
  • Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
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Reconstitution Calculator allows you to calculate the volume of solvent required to reconstitute your vial.

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In vivo Formulation Calculator (Clear solution)
Step 1: Enter information below (Recommended: An additional animal to make allowance for loss during the experiment)
Step 2: Enter in vivo formulation (This is only a calculator, not the exact formulation for a specific product. Please contact us first if there is no in vivo formulation in the solubility section.)
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Calculation results

Working concentration mg/mL;

Method for preparing DMSO stock solution mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.

Method for preparing in vivo formulation:Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O,mix and clarify.

(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
             (2) Be sure to add the solvent(s) in order.

Biological Data
  • Figure 1 Characterization of Rbin-1, a Potent Chemical Inhibitor of Cell Growth. Cell . 2016 Oct 6;167(2):512-524.e14.
  • Analysis of Rbin-1-Sensitive and -Resistant mdn1 Mutants, Related to Figure 1. Cell . 2016 Oct 6;167(2):512-524.e14.
  • Analysis of Rbin-1 Analogs, Related to Figure 1. Cell . 2016 Oct 6;167(2):512-524.e14.
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