1. Signaling Pathways
  2. Cell Cycle/DNA Damage
  3. PAK


PAKs (p21-activated kinases) are key regulators of actin dynamics, cell proliferation and cell survival. PAKs are Ser/Thr kinases that are classified into two groups on the basis of their structural and functional features: group I (PAK1–3) and group II (PAK4–6). Group I PAKs have an auto-inhibitory domain (also called an inhibitory switch domain) and a kinase domain (catalytic domain, CD) and are activated by the binding of the active (that is, GTP-bound) forms of Rho GTPases, such as Cdc42 and Rac1. Group II PAKs have no auto-inhibitory domains and are not activated by active Rho GTPases. Because the deregulation of PAKs is closely associated with various human diseases,small-molecule inhibitors of these kinases have great potential as therapeutic agents. In addition, these compounds can also be used as powerful tools in studies aimed at understanding the PAK signaling pathway.

PAKs are considered prime regulators of the actin cytoskeleton and motility. Due to their central role in actin remodelling and their ability to activate Matrix metalloproteinases (MMPs), Rho GTPases play an important role in tumor cell invasion and metastasis. The current evidence suggests the involvement of PAKs in motility, cell survival, anchorage-independent growth, angiogenesis, invasion, migration and regulation of cell cycle and mitosis. Consequently, PAKs have also been implicated in a number of pathological conditions including cancer.

PAK Isoform Specific Products:

  • PAK1

  • PAK2

  • PAK3

  • PAK4

  • PAK5

  • PAK6

PAK Related Products (14):

Cat. No. Product Name Effect Purity
  • HY-12005
    Fingolimod hydrochloride Activator 99.86%
    Fingolimod hydrochloride (FTY720) is a sphingosine 1-phosphate (S1P) antagonist with an IC50 of 0.033 nM in K562 and NK cells. Fingolimod hydrochloride also is a pak1 activator.
  • HY-13007
    PF-3758309 Inhibitor 99.95%
    PF-3758309 is a potent, orally available, and reversible ATP-competitive inhibitor of PAK4 (Kd= 2.7 nM; Ki=18.7 nM). PF-3758309 has the expected cellular functions of a PAK4 inhibitor: inhibition of anchorage-independent growth, induction of apoptosis, cytoskeletal remodeling, and inhibition of proliferation.
  • HY-15027
    5-Aminosalicylic Acid Inhibitor >98.0%
    5-Aminosalicylic acid (Mesalamine) acts as a specific PPARγ agonist and also inhibits p21-activated kinase 1 (PAK1) and NF-κB.
  • HY-15663
    IPA-3 Inhibitor 99.43%
    IPA-3 is a selective non-ATP competitive PAK1 inhibitor with IC50 of 2.5 μM, and shows no inhibition to group II PAKs (PAKs 4-6).
  • HY-11063
    Fingolimod Activator 99.81%
    Fingolimod (FTY720 free base) is a sphingosine 1-phosphate (S1P) antagonist with an IC50 of 0.033 nM in K562 and NK cells. Fingolimod also is a pak1 activator, a immunosuppressant.
  • HY-15542B
    FRAX486 Inhibitor 98.09%
    FRAX486 is a p21-activated kinase (PAK) inhibitor with IC50s of 14, 33 and 39 nM for PAK1, PAK2 and PAK3, respectively.
  • HY-15542A
    FRAX597 Inhibitor 99.56%
    FRAX597 is a potent group I p21-activated Kinases (PAKs) inhibitor with IC50 of 8, 13 and 19 nM for PAK1, 2 and 3.
  • HY-19635
    G-5555 Inhibitor 99.18%
    G-5555 is a potent p21-activated kinase 1 (PAK1) inhibitor with Kis of 3.7 nM and 11 nM for PAK1 and PAK2, respectively.
  • HY-19538
    FRAX1036 Inhibitor 99.32%
    FRAX1036 is a PAK inhibitor with Kis of 23.3 nM, 72.4 nM, and 2.4 μM for PAK1, PAK2 and PAK4, respectively.
  • HY-12632
    GNE 2861 Inhibitor 99.33%
    GNE 2861 is a PAK inhibitor that displays group II selectivity. GNE 2861 inhibits PAK4, PAK5 and PAK6 with IC50s of 7.5, 36, 126 nM, respectively.
  • HY-100519
    NVS-PAK1-1 Inhibitor >99.0%
    NVS-PAK1-1 is a potent and selective allosteric PAK1 inhibitor with an IC50 of 5 nM.
  • HY-19635A
    G-5555 hydrochloride Inhibitor 98.78%
    G-5555 hydrochloride is a potent and selective p21-activated kinase 1 (PAK1) inhibitor with a Ki of 3.7 nM.
  • HY-125035
    LCH-7749944 Inhibitor 99.43%
    LCH-7749944 (GNF-PF-2356) is a potent PAK4 inhibitor with an IC50 of 14.93 μM. LCH-7749944 effectively suppresses the proliferation of human gastric cancer cells through downregulation of PAK4/c-Src/EGFR/cyclin D1 pathway and induces apoptosis.
  • HY-131265
    Mesalamine impurity P Inhibitor
    Mesalamine impurity P is an impurity of Mesalamine (HY-15027). 5-Aminosalicylic acid (Mesalamine) acts as a specific PPARγ agonist and also inhibits p21-activated kinase 1 (PAK1) and NF-κB.
Isoform Specific Products

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