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Safety Information

SML1979

Sigma-Aldrich

FM-381

≥98% (HPLC)

Synonym(s):

(E)-2-Cyano-3-(5-(1-cyclohexyl-1,6-dihydroimidazo[4,5-d]pyrrolo[2,3-b]pyridin-2-yl)furan-2-yl)-N,N-dimethylacrylamide, 2-Cyano-3-(5-(1-cyclohexyl-1,6-dihydroimidazo[4,5-d]pyrrolo[2,3-b]pyridin-2-yl)furan-2-yl)-N,N-dimethylacrylamide

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About This Item

Empirical Formula (Hill Notation):
C24H24N6O2
CAS Number:
2226521-65-7
Molecular Weight:
428.49
UNSPSC Code:
12352202
NACRES:
NA.77

Assay

≥98% (HPLC)

form

powder

color

white to beige

solubility

DMSO: 2 mg/mL, clear (warmed)

storage temp.

2-8°C

SMILES string

CN(C(/C(C#N)=C/C(O1)=CC=C1C2=NC3=CN=C(NC=C4)C4=C3N2C5CCCCC5)=O)C

Biochem/physiol Actions

FM-381 is a highly potent and JAK3-selective janus kinase (JAK) inhibitor (IC50 = 127 pM/JAK3, 52 nM/JAK1, 346 nM/JAK2, 459 nM/TYK2 by radiometric assay; [ATP] = 10 μM) that targets JAK3 gatekeeper (GK) Cys909 for a reversible covalent interaction, exhibiting much reduced or little potency against a panel of 409 other kinases. FM-381 is >3-fold more potent than the JAK1/3 inhibitor Tofacitinib (IC50 = 292 pM/JAK3, 496 pM/JAK1, 2.2 nM/JAK2, 8.9 nM/TYK2 by radiometric assay; [ATP] = 10 μM) in blocking JAK1/JAK3-mediated STAT5 phosphorylation in human CD4+ T-cells upon IL-2 stimulation (ECmax ∼100 nM with FM-381), while being ineffective (up to 1 μM) against JAK3-independent STAT1/3 phosphorylation following IL-6 or TNFα stimulation. For characterization details of FM-381, please visit the FM-381 probe summary on the Structural Genomics Consortium (SGC) website.

FM-479 is the negative control for the active probe, FM-381. FM-479 is available from Sigma. To learn more about and purchase FM-479, click here.

To learn about other SGC chemical probes, visit sigma.com/sgc

Features and Benefits

FM-381 is a chemical probe available through a partnership with the Structural Genomics Consortium (SGC). To learn more and view other SGC chemical probes, visit sigma.com/SGC.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

PDSCL

Deleterious substance

JAN Code

SML1979-5MG:
SML1979-BULK-CR:
SML1979-VAR:
SML1979 -BULK:
SML1979 -5MG:
SML1979-BULK:
SML1979-25MG:

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Michael Forster et al.
Cell chemical biology, 23(11), 1335-1340 (2016-11-15)
Janus kinases (JAKs) are a family of cytoplasmatic tyrosine kinases that are attractive targets for the development of anti-inflammatory drugs given their roles in cytokine signaling. One question regarding JAKs and their inhibitors that remains under intensive debate is whether

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