I-BET151

Structure

Information

Protein target names: BRD4 BRD2 BRD3

Mechanism of action: Antagonist

Primary References:

In Vitro Validations

Uniprot ID: O60885
Target Class: Epigenetics
Target SubClass: Bromodomain
Potency: IC50
Potency Value: 790 nM
Potency Assay: IC50 was measured in ligand-displacement assay
PDB ID for probe-target interaction (3D structure): 3JVK

DOI Reference: 10.1038/nature10509

Uniprot ID: O60885
Target Class: Epigenetics
Target SubClass: Bromodomain
Potency: Kd
Potency Value: 100 nM
Potency Assay: SPR
PDB ID for probe-target interaction (3D structure): 3ZYU

DOI Reference: 10.1038/nature10509

In Cell Validations

In Vivo Data

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SERP Comments


27 Apr 2017

There are a number of well-characterized tool molecules available for the BRD2/3/4 family, and anyone seeking to use one of these probes is advised to consult the Chemical Probes Portal pages to view the latest molecules and data before selecting the appropriate probe. Across the probes listed, JQ1, PFI-1 as well as this I-BET151 are all broadly selective for the sub-family of BRD4-related bromodomains, with some evidence of cellular and in vivo activity. The relative levels of potency/activity are different across these assays. This molecule (like JQ1) is very well characterized, with wide selectivity building confidence that this probe will act on the BRD4-related bromodomains rather than on other targets.

20 May 2016

In a single-dose, mouse PK study (IP administration), I-BET-151 showed increased exposure and half-life compared to JQ1.

20 May 2016

Due to the low potency of I-BET151, I would not recommend it as a cellular probe. More potent probes for BRD4 exist (e.g., JQ1 and I-BET762). None of these are selective for BRD4 though; they inhibit all of the BET family proteins with equal potency.

27 Apr 2017

I-BET151 is less potent than other BET inhibitors such as JQ1, but it has better in vivo PK properties in mice.