RFX8 Activators
Chemical activators of regulatory factor X8 can modulate this protein's activity through various intracellular signaling pathways, primarily by influencing its phosphorylation state. Forskolin, a potent activator of adenylyl cyclase, raises intracellular cAMP levels, which in turn activate protein kinase A (PKA). Upon activation, PKA can phosphorylate regulatory factor X8, leading to its functional activation. Similarly, IBMX functions by inhibiting phosphodiesterases, thereby preventing the breakdown of cAMP and ensuring sustained PKA activation. This cascade also converges on the phosphorylation and subsequent activation of regulatory factor X8. 8-Br-cAMP and Dibutyryl cAMP, both cAMP analogs, activate PKA by directly increasing the intracellular concentration of cAMP, which contributes to the activation of regulatory factor X8 through phosphorylation by PKA.
In addition to cAMP-related mechanisms, other signaling molecules affect regulatory factor X8 through different pathways. Phorbol 12-myristate 13-acetate (PMA) and PDBu are known to activate protein kinase C (PKC), which can then phosphorylate regulatory factor X8. Ionomycin and A23187 raise intracellular calcium levels and activate calcium-dependent kinases, which are another route to the phosphorylation and activation of regulatory factor X8. Thapsigargin also increases cytosolic calcium by inhibiting the sarcoplasmic/endoplasmic reticulum Ca2+ ATPase (SERCA) pumps, leading to similar calcium-mediated activation of kinases that target regulatory factor X8. Lastly, Calyculin A and Okadaic Acid inhibit protein phosphatases like PP1 and PP2A, which normally dephosphorylate proteins. By inhibiting these phosphatases, they maintain regulatory factor X8 in a phosphorylated and active state, circumventing the usual regulatory mechanisms that would reverse its activation.
| Product Name | CAS # | Catalog # | QUANTITY | Price | Citations | RATING |
|---|---|---|---|---|---|---|
IBMX | 28822-58-4 | sc-201188 sc-201188B sc-201188A | 200 mg 500 mg 1 g | $260.00 $350.00 $500.00 | 34 | |
IBMX increases intracellular cAMP by inhibiting phosphodiesterases, which degrade cAMP. The resulting rise in cAMP levels activates PKA, which then phosphorylates and activates regulatory factor X8. | ||||||
PMA | 16561-29-8 | sc-3576 sc-3576A sc-3576B sc-3576C sc-3576D | 1 mg 5 mg 10 mg 25 mg 100 mg | $41.00 $132.00 $214.00 $500.00 $948.00 | 119 | |
PMA activates protein kinase C (PKC), which can phosphorylate and activate a wide array of proteins, including transcription factors. Activation of PKC can lead to subsequent phosphorylation and activation of regulatory factor X8. | ||||||
Ionomycin | 56092-82-1 | sc-3592 sc-3592A | 1 mg 5 mg | $78.00 $270.00 | 80 | |
Ionomycin raises intracellular calcium levels which can activate calcium-dependent protein kinases. These kinases can phosphorylate and activate transcription factors such as regulatory factor X8. | ||||||
Calyculin A | 101932-71-2 | sc-24000 sc-24000A | 10 µg 100 µg | $163.00 $800.00 | 59 | |
Calyculin A inhibits protein phosphatases PP1 and PP2A, leading to increased phosphorylation levels of proteins. This inhibition can result in the sustained activation of regulatory factor X8 by preventing its dephosphorylation. | ||||||
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, similar to Calyculin A, inhibits protein phosphatases such as PP1 and PP2A. By doing so, it maintains proteins in a phosphorylated state, which can include the activation of regulatory factor X8 through sustained phosphorylation. | ||||||
Thapsigargin | 67526-95-8 | sc-24017 sc-24017A | 1 mg 5 mg | $136.00 $446.00 | 114 | |
Thapsigargin inhibits the sarcoplasmic/endoplasmic reticulum Ca2+ ATPase (SERCA), leading to an increase in cytosolic calcium. The elevated calcium levels activate calcium-dependent kinases that can phosphorylate and activate regulatory factor X8. | ||||||
8-Bromo-cAMP | 76939-46-3 | sc-201564 sc-201564A | 10 mg 50 mg | $126.00 $328.00 | 30 | |
8-Br-cAMP is a cAMP analog that activates PKA. Activated PKA can phosphorylate regulatory factor X8, leading to its activation. | ||||||
Dibutyryl-cAMP | 16980-89-5 | sc-201567 sc-201567A sc-201567B sc-201567C | 20 mg 100 mg 500 mg 10 g | $47.00 $136.00 $492.00 $4552.00 | 74 | |
Dibutyryl cAMP, also a cAMP analog, raises intracellular cAMP when it diffuses into cells and is hydrolyzed. The increased cAMP activates PKA, which can phosphorylate and thus activate regulatory factor X8. | ||||||
A23187 | 52665-69-7 | sc-3591 sc-3591B sc-3591A sc-3591C | 1 mg 5 mg 10 mg 25 mg | $55.00 $131.00 $203.00 $317.00 | 23 | |
A23187 is a calcium ionophore that increases intracellular calcium concentration, leading to the activation of calcium-dependent kinases. These kinases can phosphorylate and contribute to the activation of regulatory factor X8. | ||||||
Phorbol-12,13-dibutyrate | 37558-16-0 | sc-202285 | 1 mg | $124.00 | 3 | |
PDBu is a PKC activator that can mimic diacylglycerol (DAG). It activates PKC isoforms which can phosphorylate regulatory factor X8, leading to its activation. | ||||||