FEM-2 Inhibitors
Chemical inhibitors of FEM-2, a protein phosphatase, can affect the activity of this enzyme through various mechanisms, mainly by altering the phosphorylation balance within the cell. Staurosporine, a kinase inhibitor, can reduce the availability of phosphorylated substrates for FEM-2, leading to its functional inhibition. Similarly, Okadaic Acid, Calyculin A, Cantharidin, Endothall, Tautomycin, Fostriecin, and Microcystin-LR, all protein phosphatase inhibitors, can cause an increase in the phosphorylated state of cellular proteins. This shift in the phosphorylation equilibrium results in a decreased pool of dephosphorylated substrates for FEM-2, thereby inhibiting its activity. These inhibitors collectively contribute to the elevation of phosphorylated proteins, thereby saturating the phosphorylation landscape and limiting the action of FEM-2 on its target substrates.
Additionally, Ionomycin raises intracellular calcium levels, which can activate calcium-dependent protein kinases that indirectly inhibit FEM-2 by changing the phosphorylation states of proteins. Rubratoxin B indirectly reduces the amount of substrate available to FEM-2 by inhibiting protein synthesis and, therefore, decreasing the overall levels of proteins in the cell. Cyclosporin A inhibits calcineurin, another protein phosphatase, which can indirectly influence the function of FEM-2 through alterations in the phosphoprotein environment. Cerulenin disrupts lipid biosynthesis, which could affect membrane-associated proteins and signaling pathways that are important for the proper functioning of FEM-2. The collective action of these chemical inhibitors disrupts the normal regulatory functions of phosphatases like FEM-2, leading to its inhibition through a variety of indirect mechanisms that involve changes in the phosphorylation status of proteins and the availability of substrates and regulatory factors within the cell.
SEE ALSO...
| Product Name | CAS # | Catalog # | QUANTITY | Price | Citations | RATING |
|---|---|---|---|---|---|---|
Staurosporine | 62996-74-1 | sc-3510 sc-3510A sc-3510B | 100 µg 1 mg 5 mg | $82.00 $153.00 $396.00 | 113 | |
Staurosporine is a potent inhibitor of protein kinases, and FEM-2 is a phosphatase. Inhibition of upstream kinases can lead to reduced phosphorylation targets for FEM-2, thereby reducing its substrate availability and inhibiting its activity. | ||||||
Okadaic Acid | 78111-17-8 | sc-3513 sc-3513A sc-3513B | 25 µg 100 µg 1 mg | $291.00 $530.00 $1800.00 | 78 | |
Okadaic acid is a potent inhibitor of protein phosphatases. By inhibiting protein phosphatases PP1 and PP2A, it can indirectly lead to increased phosphorylation of proteins, potentially counteracting the dephosphorylation activity of FEM-2. | ||||||
Calyculin A | 101932-71-2 | sc-24000 sc-24000A | 10 µg 100 µg | $163.00 $800.00 | 59 | |
Similar to okadaic acid, Calyculin A inhibits protein phosphatases such as PP1 and PP2A. This can lead to an overall increase in phosphorylation within the cell, indirectly inhibiting the phosphatase activity of FEM-2 by reducing its action on substrates. | ||||||
Cantharidin | 56-25-7 | sc-201321 sc-201321A | 25 mg 100 mg | $89.00 $279.00 | 6 | |
Cantharidin is an inhibitor of protein phosphatases 1 and 2A. Its mode of action is by inhibiting these phosphatases, which could lead to a compensatory cellular response reducing the activity of other phosphatases like FEM-2 through substrate depletion or regulatory feedback mechanisms. | ||||||
Endothall | 145-73-3 | sc-201325 sc-201325A | 20 mg 100 mg | $49.00 $203.00 | 1 | |
Endothall acts as a protein phosphatase inhibitor, particularly affecting PP2A. Inhibition of PP2A could indirectly inhibit FEM-2 function by causing a build-up of phosphorylated proteins, which are less available for FEM-2 to act upon. | ||||||
Fostriecin | 87860-39-7 | sc-202160 | 50 µg | $265.00 | 9 | |
Fostriecin selectively inhibits PP2A and PP4, which are protein phosphatases. By inhibiting these, it could lead to enhanced phosphorylation levels within the cell, potentially reducing the activity of FEM-2 by limiting its substrate pool. | ||||||
Ionomycin, free acid | 56092-81-0 | sc-263405 sc-263405A | 1 mg 5 mg | $96.00 $264.00 | 2 | |
Ionomycin is a calcium ionophore that raises intracellular calcium levels. Elevated calcium levels can activate calcium-dependent protein kinases and inhibit calcium-sensitive phosphatases, which might result in indirect inhibition of FEM-2 activity due to altered phosphorylation states. | ||||||
Cyclosporin A | 59865-13-3 | sc-3503 sc-3503-CW sc-3503A sc-3503B sc-3503C sc-3503D | 100 mg 100 mg 500 mg 10 g 25 g 100 g | $63.00 $92.00 $250.00 $485.00 $1035.00 $2141.00 | 69 | |
Cyclosporin A inhibits calcineurin, a protein phosphatase, which ultimately leads to the inhibition of the NFAT pathway, important for T-cell activation. Calcineurin inhibition might impact FEM-2 indirectly through altering the phosphoprotein landscape and FEM-2's associated regulatory pathways. | ||||||
Cerulenin (synthetic) | 17397-89-6 | sc-200827 sc-200827A sc-200827B | 5 mg 10 mg 50 mg | $161.00 $312.00 $1210.00 | 9 | |
Cerulenin inhibits fatty acid synthase, which is crucial for lipid biosynthesis. By disrupting lipid metabolism and membrane composition, cerulenin might influence signaling pathways and membrane-associated proteins that are critical for FEM-2's function, leading to its indirect inhibition. | ||||||