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[1][2].
Benproperine phosphate is an orally active, potent actin-related protein 2/3 complex subunit 2 (ARPC2) inhibitor. Benproperine phosphate attenuates the actin polymerization rate of action polymerization nucleation by impairing Arp2/3 function. Benproperine phosphate has the potential for a cough suppressant and suppresses cancer cell migration and tumor metastasis[1].
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[1].
187-1, N-WASP inhibitor, a 14-aa cyclic peptide, is an allosteric neural Wiskott-Aldrich syndrome protein (N-WASP) inhibitor. 187-1, N-WASP inhibitor potently inhibits actin assembly induced by phosphatidylinositol 4,5-bisphosphate (PIP2) with an IC50 of 2 μM. 187-1, N-WASP inhibitor prevents the activation of Arp2/3 complex by N-WASP by stabilizing the autoinhibited state of the protein[1][2].
CK-869 is an Actin-Related Protein 2/3 (ARP2/3) complex inhibitor, with an IC50 of 7 μM.
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.
EG-011 is the first-in-class and potent Wiskott-Aldrich syndrome protein (WASP) activator. EG-011 activates the auto-inhibited form of WASP with strong actin polymerization. EG-011 has selective anti-tumor activity in lymphomas[1][2][3].
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[1][2].
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.
Dihydrocytochalasin B is a Cytokinesis inhibitor and changes the morphology of the cells, similar to that of cytochalasin B; does not inhibit glucose transport[1]. Dihydrocytochalasin B (H2CB) disrupts the actin structure and inhibits the ability of growth factors to stimulate DNA synthesis, reversibly blocks initiation of DNA synthesis, causes cell rounding and a loss of actin microfilament bundles[2]. Dihydrocytochalasin B is related to transcytoplasmic movement of calcium by inhibiting active calcium transport and causes a Ca+increase in the mucosal scrapings[3].
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[1][2][3].
Wiskostatin is a potent and selective inhibitor of neuronal Wiskott-Aldrich syndrome protein (N-WASP)-mediated actin polymerization. Wiskostatin causes a rapid, profound, and irreversible decrease in cellular ATP levels[1].