GSK 4027 is a PCAF GCN5 bromodomain chemical probe. In a time-resolved fluorescence resonance energy transfer (TR-FRET) assay, it has a pIC50 of 7.4±0.11 for PCAF.
GSK4028 is the enantiomeric negative control of GSK4027, which is a PCAF GCN5 bromodomain chemical probe. The pIC50 of GSK4028 is 4.9 in a TR-FRET assay.
CAY10669 is an inhibitor of the histone acetyltransferase PCAF (p300 CREB-binding protein-associated factor; IC50 = 662 μM), displaying a 2-fold improvement in inhibitory potency over anacardic acid . At 30-60 μM, CAY10669 can dose-dependently inhibit histone H4 acetylation in HepG2 cells in vitro.
High affinity and selective cell-permeable p300/CBP-associated factor (PCAF) inhibitor (Ki = 47 nM). Exhibits no significant activity against a panel of 48 other bromodomains except GCN5 (Kd = 600 nM). Exhibits >4500-fold selectivity for PCAF over BRD4. Also exhibits metabolic stability in mouse and human liver microsomes and no observable cytotoxicity in peripheral blood mononuclear cells (PBMC). Moustakim et al (2017) Discovery of a PCAF bromodomain chemical probe. Angew.Chem.Int.Ed. 56 827 PMID:27966810
Selective p300 histone acetyltransferase (HAT) inhibitor (IC50 = 50-500 nM). Exhibits approximately 100-fold selectivity for p300 over PCAF (IC50 = 200 μM). Inhibits p300-dependent transcription. Active in vivo. Lau et al (2000) HATs off: selective synthetic inhibitors of the histone acetyltransferases p300 and PCAF. Mol.Cell. 5 589 PMID:10882143 |Liu et al (2008) The structural basis of protein acetylation by the p300/CBP transcriptional coactivator. Nature. 451 846 PMID:18273021 |Burns et al (2005) Iso-coenzyme A. J.Biol.Chem. 280 16550 PMID:15708855 |Cebrat et al (2003) Synthesis and analysis of potential prodrugs of coenzyme A analogues for the inhibition of the histone acetyltransferase p300. Bioorg.Med.Chem. 11 3307 PMID:12837541
YF-2 hydrochloride is a potent histone acetyltransferase activator that exhibits high selectivity and can pass through the blood-brain barrier. It specifically acetylates H3 in the hippocampus, with EC50 values of 2.75 μM, 29.04 μM, and 49.31 μM for CBP, PCAF, and GCN5, respectively. Notably, it does not affect HDAC activity. Moreover, YF-2 hydrochloride demonstrates promising anti-cancer and anti-Alzheimer's disease properties.