Date published: 2026-4-1

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Olr557 Activators

Chemical activators of Olr557 include a variety of compounds that initiate a cascade of intracellular events, ultimately leading to the activation of this protein. Forskolin directly targets adenylyl cyclase, the enzyme responsible for converting ATP to cyclic AMP (cAMP). An increase in cAMP levels activates Protein Kinase A (PKA), which can then phosphorylate Olr557, thereby activating it. Similarly, Isoproterenol and Epinephrine act upon beta-adrenergic receptors, while Norepinephrine engages both alpha and beta-adrenergic receptors. These interactions also stimulate adenylyl cyclase, resulting in increased cAMP and PKA activation, which in turn activates Olr557.

Histamine, upon binding to its H2 receptors, and Prostaglandin E2, through its interaction with EP receptors, both lead to the activation of adenylyl cyclase. This sequence of events produces the same outcome: a rise in cAMP levels, activation of PKA, and subsequent phosphorylation of Olr557. Dopamine and Adenosine also facilitate the production of cAMP through their respective receptors, further leading to PKA activation and Olr557 activation. Glucagon, a hormone, binds to its own receptors and follows the same pathway, emphasizing the diverse nature of chemical signals that can initiate Olr557 activation. Additionally, caffeine and 3-Isobutyl-1-methylxanthine (IBMX) inhibit phosphodiesterase, an enzyme that typically breaks down cAMP. The inhibition caused by these compounds results in an accumulation of cAMP and, therefore, prolonged PKA activation, which also leads to the phosphorylation of Olr557. Lastly, Serotonin, by binding to its respective receptors, can activate adenylyl cyclase, raising cAMP levels and activating PKA, which then targets Olr557 for activation.

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 binds to and activates beta-adrenergic receptors, leading to adenylyl cyclase activation. This results in increased cAMP and subsequent activation of PKA, which may phosphorylate and activate Olr557.

(−)-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 interacts with alpha and beta-adrenergic receptors, triggering adenylyl cyclase activity. The resultant rise in cAMP levels leads to PKA activation, which can phosphorylate and activate Olr557.

L-Noradrenaline

51-41-2sc-357366
sc-357366A
1 g
5 g
$326.00
$485.00
3
(0)

Norepinephrine, engaging with alpha and beta-adrenergic receptors, stimulates adenylyl cyclase, elevates cAMP levels, and activates PKA. PKA may then phosphorylate and activate Olr557.

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, upon binding to H2 receptors, activates adenylyl cyclase. The increase in cAMP levels that follows leads to activation of PKA, which can then phosphorylate and activate Olr557.

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 binds to EP receptors, which activate adenylyl cyclase and thus increase intracellular cAMP levels. The activation of PKA that ensues can lead to phosphorylation and activation of Olr557.

Dopamine

51-61-6sc-507336
1 g
$290.00
(0)

Dopamine binds to D1-like receptors, activating adenylyl cyclase, increasing cAMP, and activating PKA. The active PKA may phosphorylate and activate Olr557.

Caffeine

58-08-2sc-202514
sc-202514A
sc-202514B
sc-202514C
sc-202514D
50 g
100 g
250 g
1 kg
5 kg
$33.00
$67.00
$97.00
$192.00
$775.00
13
(1)

Caffeine inhibits phosphodiesterase, leading to increased cAMP levels due to reduced degradation. The sustained activation of PKA may phosphorylate and activate Olr557.

IBMX

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

IBMX acts as a phosphodiesterase inhibitor, increasing cAMP levels by preventing its breakdown, leading to PKA activation. PKA can then phosphorylate and activate Olr557.

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 its receptors to activate adenylyl cyclase, elevating cAMP levels and subsequently activating PKA. PKA may phosphorylate and activate Olr557.

Serotonin hydrochloride

153-98-0sc-201146
sc-201146A
100 mg
1 g
$118.00
$187.00
15
(1)

Serotonin binds to specific receptors that can activate adenylyl cyclase, leading to increased cAMP and PKA activation. PKA can then phosphorylate and activate Olr557.