PFI3

Synonym(s):(E)-1-(2-Hydroxyphenyl)-3-((1R,4R)-5-(pyridin-2-yl)-2,5-diazabicyclo[2.2.1]heptan-2-yl)prop-2-en-1-one

CAS NO.：1819363-80-8
Empirical Formula: C19H19N3O2
Molecular Weight: 321.37
MDL number: MFCD28100807
Update Date: 2026-05-30 11:30:00

What is PFI3?

Description

PFI-3 (1819363-80-8) is a selective inhibitor of family VIII bromodomains PB1(5), SMARCA2, and SMARCA4.1 It showed complete selectivity over all non-family VIII bromodomains.? PFI-3 blocked adipogenesis in C3H10T1/2 mesenchymal cells at 20μM.Treatment of embryonic stem cells with PFI-3 led to deprivation of stemness and deregulated lineage specificity. Differentiation of trophoblast stem cells in the presence of PFI-3 was enhanced.2 Cell permeable.

The Uses of PFI3

PFI-3 is a selective chemical inhibitor for SMARCA (2/4) and PBI (5) bromodomains which may result in the delay and prevention of breast cancer.

Definition

ChEBI: PFI-3 is an azabicycloalkane that is (1R,4R)-2,5-diazabicyclo[2.2.1]heptane which is substituted at position 2 by a 3-(2-hydroxyphenyl)-3-oxoprop-1-en-1-yl group and at position 5 by a pyridin-2-yl group. It is a potent and selective inhibitor of polybromo 1 (Kd = 48 nM), SMARCA2 and SMARCA4 (Kd = 89 nM) bromodomains. It is a member of pyridines, an azabicycloalkane, a member of phenols and an enone.

Biochem/physiol Actions

SMARCA4 (SWI/SNF related, Matrix associated, Actin dependent Regulator of Chromatin, subfamily A, member 4) is a transcriptional activator and is a component of the large ATP-dependent chromatin remodeling complex SWI/SNF, which is required for transcriptional activation of genes normally repressed by chromatin. SMARC4 (also known as BRG1) and the related protein SMARCA2 (also known as BRM) contain a bromodomain that is structurally similar to the PolyBromo1 (PB1) 5 bromodomain. PFI-3 is a selective chemical probe for SMARCA bromodomains that inhibits SMARCA2, SMARCA4 and PB1(5) bromodomains. For full characterization details, please visit the PFI-3 probe summary on the Structural Genomics Consortium (SGC) website.To learn about other SGC chemical probes for epigenetic targets, visit sigma.com/sgc

Storage

Store at -20°C

References

Gerstenberger et al. (2016), Identification of a chemical probe for family VIII bromodomains through optimization of a fragment hit; J. Med. Chem. 59 4800 Fedorov et al. (2015), Selective targeting of the BRG/PB1 bromodomains impairs embryonic and trophoblast stem cell maintenance; Sci. Adv. 1 e1500723

Properties of PFI3

storage temp.	2-8°C
solubility	Soluble in DMSO (>25 mg/ml)
form	powder
color	yellow to orange
Stability:	Stable for 1 year as supplied. Solutions in DMSO may be stored at -20°C for up to 1 month.

Safety information for PFI3

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H302:Acute toxicity,oral H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.