Date published: 2026-2-22

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FBXO40 Activators

FBXO40 Activators are molecules that enhance the activity of the FBXO40 protein, a member of the F-box protein family. This family of proteins is crucial for the regulation of proteasomal degradation of specific substrates by acting as part of the SCF (SKP1-cullin-F-box) complex, which confers substrate specificity. The activators of FBXO40 are involved in fine-tuning the protein's function through various biochemical mechanisms that ensure the proper turnover of substrates implicated in muscle differentiation and growth. Some activators may work by stabilizing the FBXO40 protein, allowing it to more effectively participate in the ubiquitination of its target proteins. Others might enhance the interaction between FBXO40 and its substrate proteins, thereby increasing the efficiency of the SCF complex-mediated ubiquitination process. These activators are not just stabilizers of the protein's structure but may also play a role in modulating the affinity between FBXO40 and its E2 enzyme partners, promoting the transfer of ubiquitin.

Moreover, the activators can influence the localization of FBXO40 within the cell, ensuring that it is present in the areas where its substrates are located, such as the muscle fibers where it regulates protein turnover during muscle differentiation. Some of these molecules may also upregulate the expression of key co-factors required for the SCF complex assembly, indirectly increasing the functional capacity of FBXO40. The direct activators are compounds that could bind to FBXO40 and induce conformational changes that enhance its activity, possibly by exposing the protein's active site more effectively or by facilitating the recruitment of ubiquitin-loaded E2 enzymes.

SEE ALSO...

Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Forskolin

66575-29-9sc-3562
sc-3562A
sc-3562B
sc-3562C
sc-3562D
5 mg
50 mg
1 g
2 g
5 g
$78.00
$153.00
$740.00
$1413.00
$2091.00
73
(3)

Forskolin elevates intracellular cAMP levels, which, through the activation of PKA, can enhance the ubiquitination activity of FBXO40 due to PKA's ability to phosphorylate substrates that could be recognized by FBXO40.

Ionomycin

56092-82-1sc-3592
sc-3592A
1 mg
5 mg
$78.00
$270.00
80
(4)

Ionomycin acts as a calcium ionophore, increasing intracellular calcium levels, which can affect calcineurin activity. Calcineurin influences NFAT signaling, and through this pathway, FBXO40's role in muscle differentiation could be enhanced.

IBMX

28822-58-4sc-201188
sc-201188B
sc-201188A
200 mg
500 mg
1 g
$260.00
$350.00
$500.00
34
(1)

IBMX is a non-selective inhibitor of phosphodiesterases which increases cAMP by preventing its breakdown, potentially enhancing FBXO40's ubiquitination activity in a manner similar to Forskolin, via PKA pathway activation.

Isoproterenol Hydrochloride

51-30-9sc-202188
sc-202188A
100 mg
500 mg
$28.00
$38.00
5
(0)

Isoproterenol is a beta-adrenergic agonist that increases cAMP levels in cells, thereby activating PKA. PKA-mediated phosphorylation events may enhance FBXO40's substrate recognition or ubiquitin ligase activity.

AICAR

2627-69-2sc-200659
sc-200659A
sc-200659B
50 mg
250 mg
1 g
$65.00
$280.00
$400.00
48
(2)

AICAR activates AMPK, which is involved in cellular energy homeostasis. The activation of AMPK can influence various signaling pathways, potentially enhancing the activity of FBXO40 in metabolic regulation.

PMA

16561-29-8sc-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
(6)

PMA is a PKC activator that can modulate multiple signaling pathways. PKC activation can lead to downstream effects that may enhance FBXO40's role in protein degradation through ubiquitination.

Dexamethasone

50-02-2sc-29059
sc-29059B
sc-29059A
100 mg
1 g
5 g
$91.00
$139.00
$374.00
36
(1)

Dexamethasone acts as a glucocorticoid receptor agonist which can influence muscle protein synthesis and degradation, potentially altering FBXO40 activity related to muscle atrophy.

Rosiglitazone

122320-73-4sc-202795
sc-202795A
sc-202795C
sc-202795D
sc-202795B
25 mg
100 mg
500 mg
1 g
5 g
$120.00
$326.00
$634.00
$947.00
$1259.00
38
(1)

Rosiglitazone is a PPAR-gamma agonist, which modulates lipid and glucose metabolism. Activation of PPAR-gamma could enhance FBXO40's regulatory role in metabolic processes.

Retinoic Acid, all trans

302-79-4sc-200898
sc-200898A
sc-200898B
sc-200898C
500 mg
5 g
10 g
100 g
$66.00
$325.00
$587.00
$1018.00
28
(1)

Retinoic acid activates retinoic acid receptors, influencing gene expression. This activation can modulate cellular differentiation processes in which FBXO40 is implicated.

Lithium

7439-93-2sc-252954
50 g
$214.00
(0)

LiCl inhibits GSK-3beta, leading to Wnt pathway activation. While FBXO40 is not directly part of the Wnt pathway, the modulation of GSK-3beta activity could indirectly enhance FBXO40's function in muscle tissue homeostasis.