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    InvivoChem Cat #: V0661
    CAS #: 717906-29-1Purity ≥98%

    Description: PF-431396 (PF431396) is a pyrimidine-based and selective dual inhibitor of PYK2 and FAK (focal adhesion kinase and proline-rich tyrosine kinase 2) with potential anti-osteoporotic activity. It inhibits PYK2/FAK with IC50s of 11 nM and 2 nM, respectively. PF 431396 acts by promoting osteoblast recruitment and activity, thus stimulating bone formation in ovariectomized rats. PF-431396 can be potentially used in treatment of osteoporosis.  

    ReferencesJ Biol Chem. 2009 May 8;284(19):13193-201; J Biol Chem. 2009 Aug 21;284(34):22865-77. 

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    Molecular Weight (MW)506.5
    CAS No.717906-29-1
    Storage-20℃ for 3 years in powder form
    -80℃ for 2 years in solvent
    Solubility (In vitro)DMSO: 100 mg/mL (197.43 mM) 
    Water: <1 mg/mL
    Ethanol: <1 mg/mL
    Other infoChemical Name: N-Methyl-N-[2-[[[2-[(2,3-dihydro-2-oxo-1H-indol-5-yl)amino]-5-(trifluoromethyl)-4-pyrimidinyl]amino]methyl]phenyl]methanesulfonamide
    InChi Code: InChI=1S/C22H21F3N6O3S/c1-31(35(2,33)34)18-6-4-3-5-13(18)11-26-20-16(22(23,24)25)12-27-21(30-20)28-15-7-8-17-14(9-15)10-19(32)29-17/h3-9,12H,10-11H2,1-2H3,(H,29,32)(H2,26,27,28,30)
    SMILES Code: CS(=O)(N(C)C1=CC=CC=C1CNC2=NC(NC3=CC4=C(NC(C4)=O)C=C3)=NC=C2C(F)(F)F)=O
    SynonymsPF 431396; PF431396; PF-431396; 

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    In Vitro

    In vitro activity: In A20 cells, PF-431396 blocks anti-Ig- and clustering LFA-1-induced tyrosine phosphorylation of Pyk2 and FAK, and further blocks B cell spreading. PF-431396 consistently inhibits the increase in protein tyrosine phosphorylation (PY) induced by the absence of added calcium and induced by W-7 in the presence of calcium.

    Kinase Assay: PF-431396 is dual focal adhesion kinase (FAK) and proline-rich tyrosine kinase 2 (PYK2) inhibitor (IC50 values are 2 and 11 nM respectively), PF-431396 has a Kd value of 445 nM for BRD4. IC50 value: 2 nM (FAK); 11 nM (PYK2); 445 nM (KD for BRD4) [1] [2] Target: FAK; PYK2; BRD4 in vitro: PF-431396 is a potent and highly selective pyrimidine-based inhibitor of both Pyk2 and FAK, Consistent with the idea that the tyrosine phosphorylation of Pyk2 and FAK involves an initial autophosphorylation or transphosphorylation step, treating A20 cells with PF-431396 blocked anti-Ig-induced tyrosine phosphorylation of Pyk2 and FAK when the cells were stimulated in suspension when they were stimulated on ECM. Nanomolar affinities were also determined for PF-431396 (Kd = 445 ± 42 nM) and for the PIM inhibitor (Kd = 565 ± 63 nM).

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    ReferencesJ Biol Chem. 2009 May 8;284(19):13193-201; J Biol Chem. 2009 Aug 21;284(34):22865-77. 

    These protocols are for reference only. InvivoChem does not independently validate these methods.


    PF-4618433 promotes osteogenesis of hMSC cultures. hMSC cultures were treated with PF-431396 (days 4-7) or with PF-4618433 (days 1-7), and alkaline phosphatase activity determined on day 7 (A and B, respectively). J Biol Chem. 2009 May 8;284(19):13193-201.


    SPR analysis of PYK2 compound binding kinetics. J Biol Chem. 2009 May 8;284(19):13193-201. 


    A, molecular surface of the PYK2 in the active site region in complex with ATPγS (magenta). Critical side chains are labeled (ball and stick representation) with hydrogen bonds (dashed lines). B, active site of PYK2 bound to PF-431396 (magenta). Hydrophobic residues interacting with the sulfonamide group are shown in yellow. J  Biol Chem. 2009 May 8;284(19):13193-201. 


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