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382113

Sigma-Aldrich

Histone Acetyltransferase p300 Inhibitor, C646 - Calbiochem

Histone Acetyltransferase p300 Inhibitor, C646, CAS 328968-36-1, is a cell-permeable, reversible inhibitor of p300/CBP HAT (Ki = 400 nM). Competes with acetyl-CoA for the p300 Lys-CoA binding pocket.

Synonym(s):
Histone Acetyltransferase p300 Inhibitor, C646 - Calbiochem, 4-(4-{[5-(4,5-dimethyl-2-nitrophenyl)furan-2-yl]methylidene}-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzoic acid, p300/CBP Inhibitor IV, Histone Acetyltransferase Inhibitor V, HAT Inhibitor V
Empirical Formula (Hill Notation):
C24H19N3O6
CAS Number:
Molecular Weight:
445.42
MDL number:
NACRES:
NA.77

Quality Level

assay

≥99% (sum of isomers, HPLC)

form

solid

manufacturer/tradename

Calbiochem®

storage condition

OK to freeze
protect from light

color

brick red

solubility

DMSO: 50 mg/mL

shipped in

ambient

storage temp.

−20°C

General description

A reversible, cell-permeable pyrazolone p300/CBP HAT inhibitor (Ki = 400 nM), which competes with acetyl-CoA for the p300 Lys-CoA binding pocket. This compound demonstrates 86% inhibition against p300 at 10 nM, but elicits less than 10% inhibition against serotonin N-acetyltransferase, PCAF histone acetyltransferase, GCN5 histone acetyletransferase, Rtt109 histone acetyletransferase, Sas histone acetyl transferase, and MOZ histone acetyltransferase in a chemical screening assay. Treatment of C3H 10T1/2 mouse fibroblasts with 25 µM of compound results in an inhibitory effect against basal and TSA-inducible acetylation of histones H3 and H4. It is also shown to inhibit human cell growth in both melanoma and non-small-cell-lung (NSCL) cancer cell lines at 10 µM with similar or higher potency compared with that of the peptide-based bisubstrate p300/CBP HAT inhibitor Lys-CoA-Tat at 25 µM.

Packaging

10 mg in Plastic ampoule
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

Bowers, EM., et al. 2010. Chem Biol17, 471.

Legal Information

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

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

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