Catalog #: 27613-1
Size: 10 mg
MW: 445.4 Da
CAS Registry #: 328968-36-1
Formula: C24H19N3O6
Target: p300
C646 binds to p300 as the Z-isomer forming hydrogen bonds between Thr1411, tYR1467, Trp1466 and Arg1410 on the side chains of p300 and oxygen atoms of C646. C646 is also capable of inhibiting a variety of p300 HAT mutants, including T1411A, Y1467F, W1466F and R1410A with IC50 values of 3.4 µM, 7 µM, 5 µM and 2.5 µM respectively.
C646, a pyrazolone-containing small molecule, is a cell-permeable histone acetyltransferase (HAT) inhibitor that competitively and selectively inhibits the HAT activity of p300, a transcriptional co-activator involved in a variety of gene regulatory pathways and protein acetylation events, with the Ki value of 400 nM and an IC50 value of 1.6 µM .
4-[(4Z)-4-[[5-(4,5-dimethyl-2-nitrophenyl)furan-2-yl]methylidene]-3-methyl-5-oxopyrazol-1-yl]benzoic acid
Soluble in DMSO
Storage / Stability:

Store at or below –20°C. Solid form is stable at least 12 months from date of receipt, when stored as directed. Do not store aqueous solutions for more than one day.

Bowers EM, et al. Chem Biol. 2010 May 28;17(5):471-82.
Scientific Category:
Histone Acetyltransferases
Product Type:
Data shown is lot-specific. Contact us for specific information on other lots.

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