Date published: 2026-4-23

1-800-457-3801

SCBT Portrait Logo
Seach Input

PYGB Activators

PYGB activators are a class of chemical compounds that influence the activity of the glycogen phosphorylase B enzyme (PYGB). Glycogen phosphorylase B plays a crucial role in glycogen metabolism, particularly in the breakdown of glycogen into glucose-1-phosphate, which serves as an essential energy source for cells. These activators modulate the enzyme's function, either directly or indirectly, by affecting various cellular signaling pathways and allosteric regulation.One of the primary ways in which PYGB activators function is by altering the allosteric conformation of the enzyme. For example, AMP (Adenosine Monophosphate) serves as a natural activator of PYGB. When AMP binds to the enzyme, it induces a conformational change that activates PYGB, promoting the breakdown of glycogen into glucose-1-phosphate. Similarly, calcium ions (Ca) can activate PYGB by binding to calmodulin, which, in turn, activates phosphorylase kinase. Phosphorylase kinase then phosphorylates and activates PYGB, initiating glycogenolysis. Additionally, cyclic AMP (cAMP) activates protein kinase A (PKA), a critical player in glycogen metabolism. PKA phosphorylates phosphorylase kinase, which subsequently activates PYGB. This cascade of events ultimately leads to glycogen breakdown. Another group of PYGB activators includes epinephrine and isoproterenol. These compounds bind to β-adrenergic receptors on muscle cells, initiating a cAMP-dependent signaling pathway that activates PKA. Activated PKA, in turn, leads to the activation of phosphorylase kinase and PYGB, promoting glycogenolysis. Glucagon, released by the pancreas, stimulates adenylate cyclase, increasing cAMP levels and subsequently activating PYGB through phosphorylase kinase, particularly in the liver.

SEE ALSO...

Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

N6-Methyladenosine 5′-monophosphate sodium salt

81921-35-9sc-215524A
sc-215524B
sc-215524
sc-215524D
sc-215524C
5 mg
10 mg
25 mg
100 mg
50 mg
$169.00
$254.00
$417.00
$999.00
$699.00
8
(1)

N6-Methyladenosine 5'-monophosphate sodium salt serves as a crucial regulator in cellular signaling pathways, particularly in RNA metabolism. Its unique ability to interact with specific RNA-binding proteins facilitates the recognition and modification of mRNA, influencing stability and translation efficiency. The compound exhibits distinct kinetic properties, allowing for rapid incorporation into RNA structures, which can modulate gene expression dynamics. Its ionic nature enhances solubility, promoting effective cellular interactions.

Adenosine 5′-Monophosphate, Disodium Salt

4578-31-8sc-202444
sc-202444A
sc-202444B
sc-202444C
5 g
25 g
100 g
1 kg
$60.00
$161.00
$265.00
$926.00
(1)

AMP is a natural activator of PYGB, binding to the enzyme allosterically to induce a conformational change that activates PYGB. This activation promotes the breakdown of glycogen into glucose-1-phosphate.

Calcium

7440-70-2sc-252536
5 g
$209.00
(0)

Increased intracellular calcium levels activate PYGB in muscle cells. Calcium binds to calmodulin, which activates phosphorylase kinase. Phosphorylase kinase then phosphorylates and activates PYGB, leading to glycogen breakdown for energy production.

Adenosine 3′,5′-cyclic monophosphate

60-92-4sc-217584
sc-217584A
sc-217584B
sc-217584C
sc-217584D
sc-217584E
100 mg
250 mg
5 g
10 g
25 g
50 g
$116.00
$179.00
$265.00
$369.00
$629.00
$1150.00
(1)

cAMP activates protein kinase A (PKA), initiating a crucial role in glycogen metabolism. PKA phosphorylates phosphorylase kinase, which activates PYGB. This cascade of events ultimately leads to glycogen breakdown.

(−)-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 β-adrenergic receptors on muscle cells, initiating a cAMP-dependent signaling pathway. This pathway activates PKA, leading to phosphorylase kinase activation and, subsequently, PYGB activation, promoting glycogenolysis.

Isoproterenol Hydrochloride

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

Isoproterenol mimics the effects of epinephrine by binding to β-adrenergic receptors and initiating a cAMP-dependent signaling cascade that activates PYGB, leading to glycogenolysis in muscle cells.

Diazoxide

364-98-7sc-200980
1 g
$300.00
5
(1)

Diazoxide increases the release of catecholamines, such as epinephrine, which then activate PYGB indirectly via cAMP-dependent pathways, resulting in glycogen breakdown.

Ionomycin, free acid

56092-81-0sc-263405
sc-263405A
1 mg
5 mg
$96.00
$264.00
2
(2)

Ionomycin increases intracellular calcium levels, activating phosphorylase kinase. Activated phosphorylase kinase then activates PYGB, initiating glycogenolysis in muscle cells.

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 activate PYGB indirectly by promoting the release of catecholamines, similar to diazoxide. These catecholamines subsequently activate PYGB via cAMP-dependent signaling pathways.

Dobutamine

34368-04-2sc-507555
100 mg
$295.00
(0)

Dobutamine, a β-adrenergic receptor agonist, activates PYGB through cAMP-dependent pathways, mimicking the effects of epinephrine and promoting glycogen breakdown.