Date published: 2026-4-1

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HKR1 Inhibitors

HKR1 inhibitors are a class of chemical compounds that target the HKR1 (Hippo pathway kinase-related 1) protein, a component involved in the Hippo signaling pathway. The Hippo pathway is a conserved regulatory network that controls cellular processes such as proliferation, apoptosis, and organ size by modulating downstream signaling molecules, including transcription factors and kinases. HKR1 inhibitors specifically bind to the HKR1 protein and interfere with its ability to participate in signal transduction, thereby altering the overall activity of the Hippo pathway. These inhibitors are typically designed to disrupt the enzymatic activity or the protein-protein interactions that are essential for HKR1's role in cellular signaling, leading to downstream effects on cell behavior.

Chemically, HKR1 inhibitors often belong to diverse structural classes, including small molecules, peptides, and synthetic analogs. These compounds are designed with high selectivity and affinity for the HKR1 protein, ensuring minimal off-target effects in experimental contexts. Their design may include features that enhance their binding stability, such as hydrogen bond donors and acceptors, as well as hydrophobic groups that optimize interactions with the active site or binding domains of HKR1. Studies on HKR1 inhibitors typically involve detailed structure-activity relationship (SAR) analyses to optimize potency and selectivity. Additionally, HKR1 inhibitors are valuable tools in the investigation of Hippo pathway regulation, providing insights into the molecular mechanisms that govern cellular growth and differentiation. Their applications in biological research extend to various models where modulation of the Hippo pathway is required for experimental control of cell proliferation or survival.

SEE ALSO...

Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

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)

Direct activator of Protein Kinase C (PKC), which may phosphorylate HKR1 or associated proteins, enhancing its activity.

Ionomycin

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

Calcium ionophore that increases intracellular calcium concentration, possibly activating calcium-dependent kinases that phosphorylate HKR1.

IBMX

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

Non-specific inhibitor of phosphodiesterases, sustaining cAMP and cGMP levels, which may lead to PKA activation and subsequent phosphorylation of HKR1.

(−)-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)

Stimulates adrenergic receptors, leading to increased cAMP and activation of PKA, potentially resulting in HKR1 phosphorylation and activation.

A23187

52665-69-7sc-3591
sc-3591B
sc-3591A
sc-3591C
1 mg
5 mg
10 mg
25 mg
$55.00
$131.00
$203.00
$317.00
23
(1)

Calcium ionophore that can raise intracellular calcium levels, potentially activating calmodulin-dependent kinases that phosphorylate HKR1.

LY 294002

154447-36-6sc-201426
sc-201426A
5 mg
25 mg
$123.00
$400.00
148
(1)

PI3K inhibitor that may alter downstream AKT signaling, thereby potentially modulating the phosphorylation state of HKR1 if it is part of the PI3K/AKT pathway.

SB 203580

152121-47-6sc-3533
sc-3533A
1 mg
5 mg
$90.00
$349.00
284
(5)

p38 MAPK inhibitor that could shift the signaling balance and indirectly enhance the activity of HKR1 if it is negatively regulated by p38 MAPK.

Zaprinast (M&B 22948)

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

Inhibitor of cyclic GMP phosphodiesterase, increasing cGMP levels which might lead to activation of PKG and then indirectly enhance the activation of HKR1.

Rolipram

61413-54-5sc-3563
sc-3563A
5 mg
50 mg
$77.00
$216.00
18
(1)

Selective phosphodiesterase 4 inhibitor, which increases cAMP levels, possibly leading to enhanced PKA-media