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fm-381 (c15-1723-172)

FM-381 (C005B-311373)

Catalog No.
C005B-311373
Manufacturer No.
SML1979-25MG
Manufacturer Name
Sigma-Aldrich
Quantity
25
Unit of Measure
MG

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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 μ:M) that targets JAK3 gatekeeper (GK) Cys909 for a

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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.

UPC:
42201806
Condition:
New
HazmatClass:
No
MPN:
SML1979-25MG
Temperature Control Device:
Yes

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