Date published: 2026-4-24

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Olr421 Activators

Chemical activators of Olr421 function by engaging with various components of the cellular signaling pathways to modulate the activity of this protein. Forskolin directly stimulates adenylyl cyclase, which catalyzes the conversion of ATP to cAMP. The increase in cAMP levels leads to the activation of protein kinase A (PKA), which then phosphorylates Olr421, enhancing its ability to bind to ligands and facilitating its signaling activity. Similarly, Isoproterenol, a beta-adrenergic agonist, activates adenylyl cyclase via G protein-coupled receptor signaling. This activation cascade also culminates in the phosphorylation and subsequent activation of Olr421 by PKA. Additionally, IBMX, by inhibiting phosphodiesterases responsible for cAMP breakdown, leads to sustained activation of PKA, which, in turn, maintains Olr421 in a phosphorylated and active state.

Other activators such as Prostaglandin E2 and Histamine exert their effects through their respective G protein-coupled receptors, which stimulate adenylyl cyclase, inducing a rise in cAMP and the consequent activation of PKA. PKA then acts to phosphorylate Olr421, which is critical for its activity. Adenosine, through its interaction with A2 adenosine receptors, similarly triggers adenylyl cyclase and raises cAMP levels, leading to PKA-mediated phosphorylation of Olr421. Vardenafil and Zaprinast, both inhibitors of different phosphodiesterases, prevent the degradation of cAMP, thereby potentiating the PKA pathway and ensuring prolonged phosphorylation and activation of Olr421. Glucagon and PACAP also promote the activation of Olr421 through their G protein-coupled receptors, which activate adenylyl cyclase and increase cAMP, resulting in PKA activation and subsequent phosphorylation of Olr421. Lastly, Cholera Toxin and Epinephrine, through their distinct mechanisms, cause sustained adenylyl cyclase activation and cAMP accumulation, leading to persistent PKA activation, which phosphorylates and activates Olr421, enhancing its role in cellular signaling.

SEE ALSO...

Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Isoproterenol Hydrochloride

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

Isoproterenol, a beta-adrenergic agonist, stimulates adenylyl cyclase through G protein-coupled receptor signaling, increasing cAMP concentration. This activates PKA, which then phosphorylates and activates Olr421, enhancing its signaling capacity.

IBMX

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

IBMX, a nonspecific inhibitor of phosphodiesterases, prevents cAMP degradation, maintaining PKA in an active state. PKA can then phosphorylate and activate Olr421, leading to an increase in its functional activity.

PGE2

363-24-6sc-201225
sc-201225C
sc-201225A
sc-201225B
1 mg
5 mg
10 mg
50 mg
$57.00
$159.00
$275.00
$678.00
37
(1)

Prostaglandin E2 interacts with its G protein-coupled receptors to activate adenylyl cyclase, elevating cAMP levels, which activates PKA. PKA then phosphorylates and activates Olr421, promoting its functional activity in cellular signaling processes.

Histamine, free base

51-45-6sc-204000
sc-204000A
sc-204000B
1 g
5 g
25 g
$94.00
$283.00
$988.00
7
(1)

Histamine can bind to H2 receptors, which are G protein-coupled receptors that activate adenylyl cyclase, leading to increased cAMP and activation of PKA. PKA phosphorylates and activates Olr421, advancing its signaling capabilities.

Adenosine

58-61-7sc-291838
sc-291838A
sc-291838B
sc-291838C
sc-291838D
sc-291838E
sc-291838F
1 g
5 g
100 g
250 g
1 kg
5 kg
10 kg
$34.00
$48.00
$300.00
$572.00
$1040.00
$2601.00
$4682.00
1
(0)

Adenosine interacts with A2 adenosine receptors, which are linked to adenylyl cyclase activation. The resulting increase in cAMP activates PKA, and PKA in turn phosphorylates and activates Olr421, facilitating its signal transduction role.

Vardenafil

224785-90-4sc-362054
sc-362054A
sc-362054B
100 mg
1 g
50 g
$526.00
$735.00
$16653.00
7
(1)

Vardenafil, a phosphodiesterase type 5 inhibitor, leads to sustained cAMP levels by preventing its breakdown. This results in prolonged PKA activation, which can phosphorylate and activate Olr421, enhancing its signaling efficiency.

Zaprinast (M&B 22948)

37762-06-4sc-201206
sc-201206A
25 mg
100 mg
$105.00
$250.00
8
(2)

Zaprinast inhibits phosphodiesterase types 3 and 4, leading to increased cAMP levels and sustained PKA activity. PKA can phosphorylate and activate Olr421, increasing its functional activity in the signaling pathways it is involved in.

PACAP(6-38)

137061-48-4sc-391136
sc-391136A
500 µg
1 mg
$540.00
$932.00
(0)

Pituitary adenylate cyclase-activating polypeptide (PACAP) binds to its G protein-coupled receptors, stimulating adenylyl cyclase and raising cAMP levels. This activates PKA, which phosphorylates and activates Olr421, enhancing its signaling function.

(−)-Epinephrine

51-43-4sc-205674
sc-205674A
sc-205674B
sc-205674C
sc-205674D
1 g
5 g
10 g
100 g
1 kg
$41.00
$104.00
$201.00
$1774.00
$16500.00
(1)

Epinephrine binds to beta-adrenergic receptors, stimulating adenylyl cyclase and increasing cAMP levels, which activates PKA. PKA phosphorylates and activates Olr421, promoting the protein’s functional signaling capacity within its respective pathways.