OS4 Inhibitors
Chemical inhibitors of OS4 include a range of compounds that functionally impede the protein's phosphatase activity. Okadaic Acid, for instance, is known to be a robust inhibitor of protein phosphatases PP1 and PP2A, and its inhibitory action leads to an accumulation of phosphorylated substrates within the cell. This accumulation is due to the fact that OS4, being similar in function to these phosphatases, is unable to dephosphorylate its substrates effectively in the presence of Okadaic Acid. Similarly, Calyculin A, Cantharidin, Fostriecin, Tautomycin, Microcystin-LR, and Endothall all share a common mechanism of maintaining proteins in a phosphorylated state by hindering the phosphatase activity of OS4. This is achieved by blocking the active site or altering the conformation of OS4, thereby preventing it from catalyzing the dephosphorylation of its specific substrates.
Moreover, compounds like Nodularin inhibit PP2A and consequently could lead to a functional inhibition of OS4 by preventing its action on phosphoproteins, which are meant to be dephosphorylated under normal cellular conditions. In a different vein, demecolcine and colchicine disrupt microtubule polymerization, which can indirectly lead to the functional inhibition of OS4 by interfering with cell cycle progression and signal transduction pathways in which OS4 is active. Paclitaxel (Taxol), by stabilizing microtubules, hinders processes dependent on microtubule disassembly, which indirectly could inhibit the activity of OS4. Vinblastine, through its binding to tubulin and subsequent inhibition of microtubule formation, similarly can impair cellular processes including those in which OS4 is involved, thereby causing functional inhibition of OS4's role within the cell.
| Product Name | CAS # | Catalog # | QUANTITY | Price | Citations | RATING |
|---|---|---|---|---|---|---|
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 1 (PP1) and 2A (PP2A), which are critical for numerous cellular processes including cell cycle regulation and signal transduction. OS4, as a phosphatase, could be functionally inhibited by okadaic acid through the inhibition of its phosphatase activity, leading to an accumulation of phosphorylated substrates that OS4 would typically dephosphorylate. | ||||||
Calyculin A | 101932-71-2 | sc-24000 sc-24000A | 10 µg 100 µg | $163.00 $800.00 | 59 | |
Similar to okadaic acid, Calyculin A is also a strong inhibitor of PP1 and PP2A. It can functionally inhibit OS4 by preventing dephosphorylation of its substrates, thereby hindering the protein's role in signal transduction and other regulatory pathways that are contingent on dephosphorylation events. | ||||||
Cantharidin | 56-25-7 | sc-201321 sc-201321A | 25 mg 100 mg | $89.00 $279.00 | 6 | |
Cantharidin is another inhibitor of serine/threonine protein phosphatases like PP1 and PP2A. By inhibiting these phosphatases, it would maintain proteins in a phosphorylated state, which is counter to the activity of OS4, thereby functionally inhibiting its dephosphorylation action. | ||||||
Fostriecin | 87860-39-7 | sc-202160 | 50 µg | $265.00 | 9 | |
Fostriecin selectively inhibits protein phosphatase 2A (PP2A) over PP1. This specific inhibition would lead to a functional inhibition of OS4 by preventing it from acting on its phosphatase substrates, assuming OS4 shares a similar sensitivity to PP2A inhibitors. | ||||||
Endothall | 145-73-3 | sc-201325 sc-201325A | 20 mg 100 mg | $49.00 $203.00 | 1 | |
Endothall is a protein phosphatase inhibitor that would hinder the activity of OS4 by maintaining its substrate proteins in a phosphorylated state, which is the opposite of what OS4 activity achieves. | ||||||
Colcemid | 477-30-5 | sc-202550A sc-202550 sc-202550B sc-202550C sc-202550D sc-202550E | 1 mg 5 mg 10 mg 50 mg 100 mg 500 mg | $68.00 $162.00 $318.00 $947.00 $1893.00 $6840.00 | 7 | |
Demecolcine disrupts microtubule polymerization which can alter signaling pathways and cellular processes that are dependent on microtubule dynamics. Given that OS4 is involved in cell cycle regulation, demecolcine could disrupt processes that require OS4 activity, leading to its functional inhibition. | ||||||
Colchicine | 64-86-8 | sc-203005 sc-203005A sc-203005B sc-203005C sc-203005D sc-203005E | 1 g 5 g 50 g 100 g 500 g 1 kg | $100.00 $321.00 $2289.00 $4484.00 $18207.00 $34749.00 | 3 | |
Colchicine binds to tubulin, inhibiting microtubule polymerization. This could impair cell cycle progression where OS4 is involved, leading to functional inhibition of OS4 by disrupting its role in the cell cycle. | ||||||
Taxol | 33069-62-4 | sc-201439D sc-201439 sc-201439A sc-201439E sc-201439B sc-201439C | 1 mg 5 mg 25 mg 100 mg 250 mg 1 g | $41.00 $74.00 $221.00 $247.00 $738.00 $1220.00 | 39 | |
Paclitaxel stabilizes microtubules and as a result, it can inhibit cellular processes that rely on microtubule disassembly, which would include pathways OS4 is active in, thus functionally inhibiting OS4. | ||||||
Vinblastine | 865-21-4 | sc-491749 sc-491749A sc-491749B sc-491749C sc-491749D | 10 mg 50 mg 100 mg 500 mg 1 g | $102.00 $235.00 $459.00 $1749.00 $2958.00 | 4 | |
Vinblastine binds to tubulin, inhibiting microtubule formation. This could functionally inhibit OS4 by disrupting cellular processes, particularly those associated with the cell cycle and signal transduction where OS4 is known to play a role. | ||||||