2. Signaling Pathways
  3. Cell Cycle/DNA Damage
  4. PERK

PERK

Protein kinase R-like endoplasmic reticulum kinase; PKR-like endoplasmic reticulum kinase

PERK

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Protein kinase R (PKR)-like endoplasmic reticulum kinase (PERK) is one of four known kinases that respond to cellular stress by deactivating the eukaryotic initiation factor 2 α (eIF2α) or other signal transduction cascades. PERK is highly expressed in pancreatic beta-cells and is essential in the beta-cell's development, differentiation and function.

PERK is a type I ER membrane protein containing a stress-sensing domain facing the ER lumen, a transmembrane segment, and a cytosolic kinase domain. Increase in unfolded proteins in the ER causes release of ER chaperones from the stress-sensing domain of PERK, which results in its activation via oligomerization and autophosphorylation at multiple serine, threonine, and tyrosine residues. Upon activation, PERK phosphorylates eIF2α at serine 51, rendering it an inhibitor of the ribosome translation initiation complex, consequently reducing overall protein synthesis. The reduction in translation reduces the ER burden, providing time for the cell to process or degrade the accumulated unfolded proteins to restore ER homeostasis. Although global protein synthesis is decreased, there is specific increased translation of certain mRNAs, such as ATF4, which modulate cellular survival pathways and enhance UPR function. Interfering with PERK function in cancer cells may limit their ability to thrive under hypoxia or nutrient deprived conditions and lead to apoptosis or tumor growth inhibition.

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-112903A
    YW3-56 hydrochloride
    YW3-56 (hydrochloride) is a PAD inhibitor. YW3-56 (hydrochloride) activates p53 target genes. YW3-56 (hydrochloride) activates ATF and blocks autophagy flux. YW3-56 induces ER stress through the PERK-eIF2α-ATF4 signaling cascade and inhibits the mTOR signaling. YW3-56 (hydrochloride) inhibits triple-negative breast cancer.
    YW3-56 hydrochloride
  • HY-B0168AR
    Milnacipran hydrochloride (Standard)
    		Inhibitor
    Milnacipran (hydrochloride) (Standard) is the analytical standard of Milnacipran hydrochloride (HY-B0168A). This product is intended for research and analytical applications. Milnacipran hydrochloride is an orally active Serotonin (HY-B1473A) and Norepinephrine (HY-13715) reuptake inhibitor. Milnacipran hydrochloride inhibits monoamine transporters, especially the norepinephrine transporter and the serotonin transporter (Ki values of 31 and 8.5 nM, respectively). Milnacipran hydrochloride inhibits pERK1/2 activation. Milnacipran hydrochloride has antidepressant, anxiolytic and analgesic properties. Milnacipran hydrochloride inhibits biting behavior in mice. Milnacipran hydrochloride can be used in the study of major depressive disorder, anxiety disorders, and neuropathic pain (e.g., fibromyalgia).
    Milnacipran hydrochloride (Standard)
  • HY-137111
    p-MPPF dihydrochloride
    		Activator
    p-MPPF dihydrochloride is a selective 5-HT antagonist that dose-dependently antagonizes the reduction of phosphorylated Erk1/2 levels in the hippocampus induced by 8-OH-DPAT (HY-112061) in rats. p-MPPF dihydrochloride can be used for neurological disease research.
    p-MPPF dihydrochloride
  • HY-B0168
    Milnacipran
    		Inhibitor
    Milnacipran is an orally active Serotonin (HY-B1473A) and Norepinephrine (HY-13715) reuptake inhibitor. Milnacipran inhibits monoamine transporters, especially the norepinephrine transporter and the serotonin transporter (Ki values of 31 and 8.5 nM, respectively). Milnacipran inhibits pERK1/2 activation. Milnacipran has antidepressant, anxiolytic and analgesic properties. Milnacipran inhibits biting behavior in mice. Milnacipran can be used in the study of major depressive disorder, anxiety disorders, and neuropathic pain (e.g., fibromyalgia).
    Milnacipran
  • HY-176539
    PAK1-IN-2
    		Inhibitor
    PAK1-IN-2 (Compound 35) is a selective PAK1 inhibitor with a Ki of 7.3 nM. PAK1-IN-2 can inhibit MEK phosphorylation. PAK1-IN-2 has significant inhibitory effects on PAK1/4 amplified cancer cell lines. PAK1-IN-2 can be used in the study of cancer.
    PAK1-IN-2
  • HY-D0205AS1
    Carbocisteine-13C3-1
    		Inhibitor
    Carbocisteine-13C3-1 (Carbocysteine-13C3-1) is 13C labeled Carbocisteine. Carbocisteine is an orally active mucolytic agent. Carbocisteine attenuates the phosphorylation of NF-κB p65 and ERK1/2. Carbocisteine modulates Nrf2/HO-1 and NFκB interplay. Carbocisteine inhibits Apoptosis. Carbocisteine is used in chronic obstructive pulmonary disease (COPD) research.
    Carbocisteine-<sup>13</sup>C3-1
  • HY-W010451R
    1,2,4-Trihydroxybenzene (Standard)
    		Activator
    1,2,4-Trihydroxybenzene (Hydroxyhydroquinone) (Standard) is the analytical standard of 1,2,4-Trihydroxybenzene (HY-W010451). This product is intended for research and analytical applications. 1,2,4-Trihydroxybenzene (Hydroxyhydroquinone) is an ER stress inducer that targets proteins such as PKR-like ER kinase PERK to induce cytotoxicity. 1,2,4-Trihydroxybenzene selectively activates eIF2α phosphorylation, activates the PERK-eIF2α signaling pathway and induces stress granule formation. 1,2,4-Trihydroxybenzene subsequently exacerbates oxidative stress and causes DNA double-strand breaks, destroying organelles such as mitochondria and ER, and inducing cell death. 1,2,4-Trihydroxybenzene also has the potential to exhibit anti-tumor effect, increase blood pressure, and relieve spasm.
    1,2,4-Trihydroxybenzene (Standard)
  • HY-137111A
    p-MPPF
    		Activator
    p-MPPF is a selective 5-HT antagonist that dose-dependently antagonizes the reduction of phosphorylated Erk1/2 levels in the hippocampus induced by 8-OH-DPAT (HY-112061) in rats. p-MPPF can be used for neurological disease research.
    p-MPPF
  • HY-N5083R
    Saponarin (Standard)
    		Inhibitor
    Saponarin (Standard) is the analytical standard of Saponarin (HY-N5083). This product is intended for research and analytical applications. Saponarin is an orally active flavonoid compound. Saponarin can be isolated from Gypsophila trichotoma. Saponarin inhibits ERK/p38, NF-κB and MAPK phosphorylation and activates AMPK. Saponarin reduces IL-1β and COX-2. Saponarin has antioxidant, anti-inflammatory, hepatoprotective, hypoglycemic and hypotensive effects. Saponarin improves sleep disorders.
    Saponarin (Standard)
  • HY-123205R
    Oxatomide (Standard)
    		Inhibitor
    Oxatomide (Standard) (KW-4354 (Standard)) is the analytical standard of Oxatomide (HY-123205). This product is intended for research and analytical applications. Oxatomide (KW-4354) is an orally active dual antagonist of the H1-histamine receptor and the P2X7 receptor, as well as an inhibitor of serotonin. Oxatomide possesses antihistaminic, antiallergic and anti-inflammatory activities. Oxatomide can be used in the research of allergic diseases.
    Oxatomide (Standard)
Cat. No. Product Name / Synonyms Application Reactivity