5.34354

p300/CBP Inhibitor X, EML425

• Synonym(s): p300/CBP Inhibitor X, EML425, 1,3-dibenzyl-5-(4-hydroxy-2,6-dimethylbenzylidene)pyrimidine-2,4,6(1H,3H,5H)-trione, EML-425, p300/CBP Acetyltransferase Inhibitor, EML425
• Empirical Formula (Hill Notation): C₂₇H₂₄N₂O₄
• Molecular Weight: 440.49
• UNSPSC Code: 12352200
• NACRES: NA.77

Properties

• assay: ≥98% (HPLC)
• Quality Level: 100
• form: solid
• manufacturer/tradename: Calbiochem^®
• storage condition: OK to freeze; protect from light
• color: yellow
• solubility: DMSO: 100 mg/mL
• storage temp.: 2-8°C

Description

General description

A cell-permeable benzylidenbarbituric acid derivative that acts as a potent, selective inhibitor of lysine acetyltransferase p300/CBP paralogues (IC₅₀ = 2.9 µM and 1.1 µM for recombinant p300 and CBP, respectively). The inhibition appears to be reversible and is non-competitive with respect to both acetyl-CoA and a histone H3 peptide. It binds to both the free enzyme and the enzyme-substrate complex with uneven affinities. Does not affect the activity of general control non-derepressible 5 (GCN5) and p300/CBP-associated factor (PCAF). Shown to reduce the acetylation of lysine H4K5 and H3K9 in U937 cells (~100 µM) and induce a cell cycle arrest at the G0/G1 phase with an increase in the percentage of hypodiploid nuclei (~ 100 µM).

A cell-permeable benzylidenbarbituric acid derivative that acts as a potent, selective inhibitor of lysine acetyltransferase p300/CBP paralogues (IC₅₀ = 2.9 µM and 1.1 µM for recombinant p300 and CBP, respectively). The inhibition appears to be reversible and is non-competitive with respect to both acetyl-CoA and a histone H3 peptide. It binds to both the free enzyme and the enzyme-substrate complex with uneven affinities. Does not affect the activity of general control non-derepressible 5 (GCN5) and p300/CBP-associated factor (PCAF). Shown to reduce the acetylation of lysine H4K5 and H3K9 in U937 cells (~100 µM) and induce a cell cycle arrest at the G0/G1 phase with an increase in the percentage of hypodiploid nuclei (~ 100 µM).

Please note that the molecular weight for this compound is batch-specific due to variable water content. Please refer to the vial label or the certificate of analysis for the batch-specific molecular weight. The molecular weight provided represents the baseline molecular weight without water.

Biochem/physiol Actions

Cell permeable: yes

Primary Target
p300/CBP

Reversible: yes

Packaging

Packaged under inert gas

Warning

Toxicity: Standard Handling (A)

Reconstitution

Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for up to 3 months at -20°C.

Other Notes

Milite, C., et al. 2015. J. Med. Chem.58, in press.

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 3
• flash_point_f: Not applicable
• flash_point_c: Not applicable