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BioAssay: AID 639340

Inhibition of human recombinant His-tagged PCAF HAT domain expressed in Escherichia coli BL21(DE3) cells using [14C]Ac-AoA and histone H4 as substrate after 5 mins by scintillation counting

Histone acetyltransferases are important enzymes that regulate various cellular functions, such as epigenetic control of DNA transcription. Development of HAT inhibitors with high selectivity and potency will provide powerful mechanistic tools for the elucidation of the biological functions of HATs and may also have pharmacological value for potential new therapies. In this work, analogs of the more ..
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 Tested Compounds
 Tested Compounds
All(1)
 
 
Active(1)
 
 
 Tested Substances
 Tested Substances
All(1)
 
 
Active(1)
 
 
AID: 639340
Data Source: ChEMBL (796788)
BioAssay Type: Confirmatory, Concentration-Response Relationship Observed
Depositor Category: Literature, Extracted
BioAssay Version:
Deposit Date: 2012-09-09
Modify Date: 2014-05-25

Data Table ( Complete ):           View Active Data    View All Data
Target
Sequence: RecName: Full=Histone acetyltransferase KAT2B; AltName: Full=Histone acetyltransferase PCAF; Short=Histone acetylase PCAF; AltName: Full=Lysine acetyltransferase 2B; AltName: Full=P300/CBP-associated factor; Short=P/CAF
Description ..   
Protein Family: PCAF (P300/CBP-associated factor) N-terminal domain
Comment ..   

Gene:KAT2B     Related Protein 3D Structures     More BioActivity Data..
BioActive Compound: 1
Description:
Title: 6-alkylsalicylates are selective Tip60 inhibitors and target the acetyl-CoA binding site.

Abstract: Histone acetyltransferases are important enzymes that regulate various cellular functions, such as epigenetic control of DNA transcription. Development of HAT inhibitors with high selectivity and potency will provide powerful mechanistic tools for the elucidation of the biological functions of HATs and may also have pharmacological value for potential new therapies. In this work, analogs of the known HAT inhibitor anacardic acid were synthesized and evaluated for inhibition of HAT activity. Biochemical assays revealed novel anacardic acid analogs that inhibited the human recombinant enzyme Tip60 selectively compared to PCAF and p300. Enzyme kinetics studies demonstrated that inhibition of Tip60 by one such novel anacardic acid derive, 20, was essentially competitive with Ac-CoA and non-competitive with the histone substrate. In addition, these HAT inhibitors effectively inhibited acetyltransferase activity of nuclear extracts on the histone H3 and H4 at micromolar concentrations.
(PMID: 22100137)
Comment
Compounds with activity <= 50uM or explicitly reported as active by ChEMBL are flagged as active in this PubChem assay presentation.

Categorized Comment
Assay Type: Binding

Assay Data Source: Scientific Literature

Assay Test Type: In vitro

BAO: Assay Format: cell-based format

Target Type: Target is a single protein chain

Result Definitions
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TIDNameDescriptionHistogramTypeUnit
OutcomeThe BioAssay activity outcomeOutcome
1IC50*IC50 PubChem standard valueFloatμM
3BEIBinding Efficiency Index(nM)Float
2SEISurface Efficiency Index(nM)Float
4LELigand EfficiencyFloat
5LLELipophilic Ligand EfficiencyFloat
6IC50 activity commentIC50 activity commentString
7IC50 standard flagIC50 standard flagInteger
8IC50 qualifierIC50 qualifierString
9IC50 published valueIC50 published valueFloatμM
10IC50 standard valueIC50 standard valueFloatnM

* Activity Concentration.

Data Table (Concise)
Data Table ( Complete ):     View Active Data    View All Data
Classification
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