Name: GSK503
Brand: Selleck Chemicals
SKU: S7804
Availability: InStock
Rating: 5 (9 reviews)

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Quality Control

Batch: Purity: 99.98%

99.98

Related Targets	HDAC JAK BET PKC PARP HIF PRMT EZH2 AMPK Histone Acetyltransferase
Other Histone Methyltransferase Inhibitors	Pinometostat (EPZ5676) 3-Deazaneplanocin A (DZNep) Hydrochloride BIX-01294 Trihydrochloride UNC1999 EPZ015666 (GSK3235025) EPZ004777 MM-102 (HMTase Inhibitor IX) Chaetocin SGC 0946 EPZ005687

Solubility

In vitro
Batch:

DMSO : 100 mg/mL (189.87 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Ethanol : 26 mg/mL

Water : Insoluble

Molarity Calculator

Mass	Concentration	Volume	Molecular Weight
Mass value Mass unit	Concentration value Concentration unit	Volume value Volume unit	Molecular weight (g/mol)

Dilution Calculator Molecular Weight Calculator

In vivo batch selection In vivo Batch:
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution	5%DMSO 1 40%PEG300 2 5%Tween80 3 50%ddH2O Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	5mg/ml (9.49mM)	Taking the 1 mL working solution as an example, add 50 μL of 100 mg/ml clarified DMSO stock solution to 400 μL of PEG300, mix evenly to clarify it; add 50 μL of Tween80 to the above system, mix evenly to clarify; then continue to add 500 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results.
Clear solution	5% DMSO 1 95% Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	5mg/ml (9.49mM)	Taking the 1 mL working solution as an example, add 50 μL of 100 mg/ml clear DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.

In vivo Formulation Calculator (Clear solution)

Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)

Dosage: mg/kg

Average weight of animals: g

Dosing volume per animal: μL

Number of animals:

Step 2: Enter the in vivo formulation (This is only the calculator, not formulation. Please contact us first if there is no in vivo formulation at the solubility Section.)

% DMSO

%

% Tween 80

% ddH₂O

% DMSO

+

%

Calculation results:

Working concentration: mg/ml;

Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid 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 master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH₂O, mix and clarify.

Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.

Note: 1. Please make sure the liquid is clear before adding the next solvent.
2. Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such
as vortex, ultrasound or hot water bath can be used to aid dissolving.

Chemical Information, Storage & Stability

Molecular Weight	526.67	Formula	C₃₁H₃₈N₆O₂	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	1346572-63-1	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	N/A			Smiles	CC1=CC(=C(C(=O)N1)CNC(=O)C2=C3C(=CN(C3=CC(=C2)C4=CN=C(C=C4)N5CCN(CC5)C)C(C)C)C)C

Mechanism of Action

Targets/IC₅₀/Ki	EZH2 8 nM
In vitro	GSK503 inhibits the methyltransferase activity of WT and mutant EZH2 with similar potency. In a panel of seven DLBCL cell lines, this compound causes growth inhibition and the effects are enhanced by ABT737 or Obatoclax.
Kinase Assay	In vitro biochemical assays against histone acetylases
Kinase Assay	GSK503 is profiled to assess inhibition against a panel of histone acetylases. This compound is dissolved in DMSO and tested in 10-dose IC50 mode with 3-fold serial dilution starting at 100 μM, with a final DMSO concentration of 2%. Anacardic Acid is used as positive control for CBP, GCN5, and pCAF and tested in 10-dose IC50 mode with 3-fold serial dilution starting at 100 μM. Curcumin is used as positive control for KAT5, MYST2/KAT7, MYST4/KAT6B, and p300, and tested in 10-dose IC50 mode with 3-fold serial dilution starting at 100 μM. Reactions are carried out at 3.08 μM Acetyl-CoA. For CBP, GCN5, MYST2/KAT7, pCAF, and p300, the substrate used is histone H3. For KAT5 and MYST4/KAT6B the substrates used are histone H2A and histone H4, respectively.
In vivo	In C57BL6 mice immunized with SRBC, GSK503 (150 mg/kg, i.p.) reduced the level of H3K27me3 in splenocytes. In male SCID mice bearing SUDHL4 and SUDHL6 tumors, this compound inhibits tumor growth. In C57Bl/6 mice bearing murine B16-F10 tumors, this chemical significantly reduces global H3K27me3 levels, inhibits tumor growth and virtually abolishes metastases formation.
References	[1] https://pubmed.ncbi.nlm.nih.gov/23680150/ [2] https://pubmed.ncbi.nlm.nih.gov/25609585/

Tech Support

Handling Instructions

Tel: +1-832-582-8158 Ext:3

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Frequently Asked Questions

Question 1:
Is there any recommended vehicle for in vivo experiment for this compound?

Answer:
The IP formulation for this compound is 2% DMSO+40% PEG 300+2%Tween 80+ddH2O.

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GSK503 Histone Methyltransferase inhibitor

Chemical Structure

Molecular Weight: 526.67