Ste3 Inhibitors
Chemical inhibitors of Ste3 can affect its function through various mechanisms. Go6976 and GF 109203X, both protein kinase C (PKC) inhibitors, can decrease the phosphorylation-dependent processes of Ste3, leading to reduced signaling function. Since PKC isoforms are often involved in the phosphorylation and regulation of GPCRs, their inhibition can directly impact the functional activity of Ste3. Similarly, PD 98059, which inhibits MEK, can lead to decreased activation or desensitization of Ste3 by interfering with the MAP kinase pathway. The MAP kinase pathway plays a critical role in modulating GPCR function, including endocytosis, and MEK is a key component of this pathway.
Brefeldin A disrupts vesicle trafficking by inhibiting ADP-ribosylation factor (ARF), which could prevent Ste3 from being properly trafficked to the cell surface where it exerts its function. Genistein targets tyrosine kinases and, although Ste3 is not directly phosphorylated by these kinases, the resulting altered cellular signaling environment can decrease the receptor activation or signaling of Ste3. Y-27632 inhibits Rho-associated protein kinase (ROCK), which can impair the internalization and recycling of Ste3, critical steps for its sustained signaling. Wortmannin and LY294002, both phosphoinositide 3-kinase (PI3K) inhibitors, can affect Ste3 by reducing its trafficking and surface expression, thus impacting its signaling capability. U73122, by inhibiting phospholipase C (PLC), can decrease the production of second messengers important for Ste3 signaling. Lastly, H-89 and SB 203580 target protein kinase A (PKA) and p38 MAP kinase, respectively, which are involved in the regulation and signaling of GPCRs, including Ste3. Inhibition of these kinases can interfere with the phosphorylation state and signaling pathways necessary for the proper function of Ste3.
| Product Name | CAS # | Catalog # | QUANTITY | Price | Citations | RATING |
|---|---|---|---|---|---|---|
Gö 6976 | 136194-77-9 | sc-221684 | 500 µg | $227.00 | 8 | |
Go6976 is a potent protein kinase C (PKC) inhibitor that inhibits certain PKC isoforms. Ste3, as a G-protein coupled receptor involved in pheromone response in yeast, could be regulated by PKC-mediated phosphorylation. Inhibition of PKC by Go6976 could therefore reduce the phosphorylation-dependent activation or trafficking of Ste3, leading to functional inhibition of Ste3 activity. | ||||||
PD 98059 | 167869-21-8 | sc-3532 sc-3532A | 1 mg 5 mg | $40.00 $92.00 | 212 | |
PD 98059 is an inhibitor of MEK, which is upstream of the MAP kinase pathway. The MAP kinase pathway is implicated in the modulation of GPCR function including endocytosis and desensitization. Ste3, being a GPCR, could rely on this pathway for its function, and inhibition of MEK by PD 98059 could result in decreased functional activity of Ste3. | ||||||
Brefeldin A | 20350-15-6 | sc-200861C sc-200861 sc-200861A sc-200861B | 1 mg 5 mg 25 mg 100 mg | $31.00 $53.00 $124.00 $374.00 | 25 | |
Brefeldin A is an inhibitor of ADP-ribosylation factor (ARF), a GTPase involved in vesicle trafficking between the Golgi and the endoplasmic reticulum. Ste3 function could be dependent on proper trafficking to the cell surface, and the inhibition of ARF by Brefeldin A could disrupt this process, leading to a decrease in Ste3 function at the cell surface. | ||||||
Genistein | 446-72-0 | sc-3515 sc-3515A sc-3515B sc-3515C sc-3515D sc-3515E sc-3515F | 100 mg 500 mg 1 g 5 g 10 g 25 g 100 g | $45.00 $164.00 $200.00 $402.00 $575.00 $981.00 $2031.00 | 46 | |
Genistein is a tyrosine kinase inhibitor. While Ste3 is not directly phosphorylated by tyrosine kinases, the inhibition of tyrosine kinases by Genistein could alter the cellular signaling environment, potentially affecting GPCR-mediated signaling pathways and thereby decreasing the functional activity of Ste3 through reduced receptor activation or signaling. | ||||||
Y-27632, free base | 146986-50-7 | sc-3536 sc-3536A | 5 mg 50 mg | $186.00 $707.00 | 88 | |
Y-27632 is an inhibitor of Rho-associated protein kinase (ROCK). ROCK influences actin cytoskeleton organization, which can affect GPCR internalization and signaling. By inhibiting ROCK, Y-27632 could impair the proper internalization and recycling of Ste3, reducing its signaling capacity and leading to functional inhibition of Ste3. | ||||||
Wortmannin | 19545-26-7 | sc-3505 sc-3505A sc-3505B | 1 mg 5 mg 20 mg | $67.00 $223.00 $425.00 | 97 | |
Wortmannin is a potent inhibitor of phosphoinositide 3-kinases (PI3K). PI3K signaling can regulate GPCR trafficking and signaling. Inhibition of PI3K by Wortmannin could lead to reduced trafficking and surface expression of Ste3, or impact on Ste3 signaling, resulting in functional inhibition of Ste3 activity. | ||||||
Bisindolylmaleimide I (GF 109203X) | 133052-90-1 | sc-24003A sc-24003 | 1 mg 5 mg | $105.00 $242.00 | 36 | |
GF 109203X is another PKC inhibitor, like Go6976. It can inhibit the function of PKC isoforms, which could be involved in the phosphorylation and regulation of GPCRs like Ste3. By inhibiting PKC, GF 109203X could decrease phosphorylation-dependent processes of Ste3, leading to reduced Ste3 signaling function. | ||||||
LY 294002 | 154447-36-6 | sc-201426 sc-201426A | 5 mg 25 mg | $123.00 $400.00 | 148 | |
LY294002 is another PI3K inhibitor, similar to Wortmannin. It can inhibit PI3K activity, which may play a role in signaling or trafficking of GPCRs like Ste3. By inhibiting PI3K, LY294002 could potentially reduce the surface expression or signaling of Ste3, leading to functional inhibition of the receptor. | ||||||