Home JAK/STAT JAK inhibitor FM-381 For research use only.

FM-381

FM-381 is a JAK3 specific reversible covalent inhibitor with IC50 of 127 pM for JAK3 and demonstrates 400-, 2,700- and 3,600-fold selectivity over JAK1, JAK2, and TYK2, respectively.

FM-381 Chemical Structure

FM-381 Chemical Structure

CAS: 2226521-65-7

Selleck's FM-381 has been cited by 1 publication

Purity & Quality Control

Batch: S854101 DMSO] 20 mg/mL] false] Ethanol] 2 mg/mL] false] Water] Insoluble] false Purity: 99.30%
99.30

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Biological Activity

Description FM-381 is a JAK3 specific reversible covalent inhibitor with IC50 of 127 pM for JAK3 and demonstrates 400-, 2,700- and 3,600-fold selectivity over JAK1, JAK2, and TYK2, respectively.
Targets
JAK3 [1]
(Cell-free)
127 pM
In vitro
In vitro FM-381 is a potent covalent reversible inhibitor of JAK3 targeting the unique Cys909 at the gatekeeper (GK) position +7 in JAK3 exhibited apparent JAK3 IC50 values of 0.127 nM, with 400-, 2700- and 3600-fold selectivity over JAK1, JAK2 and TYK2, respectively. FM-381 was found to be inactive in a selectivity panel of frequently hit BRDs (BRD4, BRPF, CECR, FALZ, TAF1, BRD9). FM-381 shows an apparent EC50 of 100 nM in a dose dependent BRET assay and blocks IL2-stimulated (JAK3/JAK1 dependent) STAT5 phosphorylation at 100 nM, but not JAK3 independent IL6-stimulated (JAK1/2/TYK dependent) STAT3 signalling in Human CD4+ T cells up to 1 µM[1].
Cell Research Cell lines CD4+ T Cell
Concentrations 0, 10, 50, 100, 300 nM
Incubation Time 1 h
Method

T cells were purified from peripheral blood mononuclear cells from human donors. Equal numbers of cells were incubated for 1 hr with JAK inhibitors or DMSO control and stimulated with cytokines for 30 min. The cells were lysed, and the proteins were separated via PAGE and transferred to a polyvinylidene fluoride membrane. The proteins of interest were blotted with specific antibodies and visualized with an infrared imaging system.

Chemical Information & Solubility

Molecular Weight 428.49 Formula

C24H24N6O2
CAS No. 2226521-65-7 SDF Download FM-381 SDF
Smiles CN(C)C(=O)C(=CC1=CC=C(O1)C2=NC3=CN=C4C(=C3N2C5CCCCC5)C=CN4)C#N
Storage (From the date of receipt)

In vitro
Batch:

DMSO : 20 mg/mL ( (46.67 mM)； Moisture-absorbing DMSO reduces solubility. Please use fresh DMSO.)

Ethanol : 2 mg/mL

Water : Insoluble


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In vivo
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Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid concentration mg/mL, Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug. )

Method for preparing in vivo formulation: Take μL DMSO master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O, mix and clarify.

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Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

Handling Instructions

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