1. Signaling Pathways
  2. Cytoskeleton
  3. Arp2/3 Complex

Arp2/3 Complex

The intact ARP2/3 complex is first purified from Acanthamoeba castellanii based on its affinity for the actin-binding protein profilin, and is shown to consist of a stable assembly of seven polypeptides. Two of the subunits are actin-related proteins of the ARP2 and ARP3 subfamilies, giving the complex its name.

The ARP2/3 complex possesses little biochemical activity on its own. However, when engaged by nucleation-promoting factor (NPF) proteins, it is activated to initiate the formation of a new (daughter) filament that emerges from an existing (mother) filament in a y-branch configuration with a regular 70° branch angle. This coupling of nucleation and branching by the ARP2/3 complex is referred to as autocatalytic branching or dendritic nucleation, and is central to its functions in vivo.

Polymerization of actin filaments directed by the Arp2/3 complex supports many types of cellular movements.

Arp2/3 Complex Related Products (8):

Cat. No. Product Name Effect Purity
  • HY-16928
    Cytochalasin B >99.0%
    Cytochalasin B is a cell-permeable mycotoxin binding to the barbed end of actin filaments, disrupting the formation of actin polymers, with Kd value of 1.4-2.2 nM for F-actin.
  • HY-16926
    CK-666 Inhibitor 99.63%
    CK-666 is a cell-permeable inhibitor of actin-related protein Arp2/3 complex, and binds to Arp2/3 complex, stabilizes the inactive state of the complex, blocking movement of the Arp2 and Arp3 subunits into the activated filament-like (short pitch) conformation.
  • HY-N6682
    Cytochalasin D Inhibitor >99.0%
    Cytochalasin D (Zygosporin A; NSC 209835) is a potent and cell-permeable inhibitor of actin polymerization derived from fungus, inhibits the G-actin–cofilin interaction by binding to G-actin. Cytochalasin D (Zygosporin A; NSC 209835) also inhibits the binding of cofilin to F-actin and decreases the rate of both actin polymerization and depolymerization in living cells.
  • HY-15892
    CK-636 Inhibitor 98.43%
    CK-636 is a cell permeable inhibitor of Arp2/3 complex, that could inhibit actin polymerization, with IC50 values of 4 μM, 24 μM and 32 μM for human, fission yeast and bovine, respectively.
  • HY-16927
    CK-869 Inhibitor 99.76%
    CK-869 is an Actin-Related Protein 2/3 (ARP2/3) complex inhibitor, with an IC50 of 7 μM.
  • HY-P0027
    Jasplakinolide Activator
    Jasplakinolide is a potent actin polymerization inducer and stabilizes pre-existing actin filaments. Jasplakinolide binds to F-actin competitively with phalloidin with a Kd of 15 nM. Jasplakinolide, a naturally occurring cyclic peptide from the marine sponge, has both fungicidal and anti-cancer activity.
  • HY-16929
    Latrunculin A Inhibitor
    Latrunculin A (LAT-A) is a toxin isolated from the red sea sponge Latrunculia magnifica, binds to actin monomers, inhibits polymerization of actin, with Kds of 0.1, 0.4, 4.7 μM and 0.19 μM for ATP-actin, ADP-Pi-actin, ADP-actin and G-actin, respectively.
  • HY-N6701
    Dihydrocytochalasin B Inhibitor
    Dihydrocytochalasin B (H2CB) is a Cytokinesis inhibitor and changes the morphology of the cells, similar to that of cytochalasin B; does not inhibit glucose transport. Dihydrocytochalasin B (H2CB) disrupts the actin structure and inhibits the ability of growth factors to stimulate DNA synthesis, reversibly blocks initiation of DNA synthesis. Dihydrocytochalasin B (H2CB) inhibits active calcium transport and causes a Ca2+increase in the mucosal scrapings.
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