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

PERK

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.

PERK Related Products (10):

Cat. No. Product Name Effect Purity
  • HY-18072
    GSK2606414 Inhibitor 99.89%
    GSK2606414 is a cell-permeable and orally available protein kinase R-like endoplasmic reticulum (ER) kinase (PERK) inhibitor with an IC50 of 0.4 nM.
  • HY-12495
    ISRIB (trans-isomer) Inhibitor ≥98.0%
    ISRIB (trans-isomer) is a potent inhibitor of PERK with an IC50 of 5 nM. ISRIB potently reverses the effects of eIF2α phosphorylation (IC50=5 nM).
  • HY-13820
    GSK2656157 Inhibitor 99.66%
    GSK2656157 is a selective and ATP-competitive inhibitor of protein kinase R (PKR)-like endoplasmic reticulum kinase (PERK) with an IC50 of 0.9 nM.
  • HY-119240
    CCT020312 Activator 98.97%
    CCT020312 is a selective EIF2AK3/PERK activator. CCT020312 elicits EIF2A phosphorylation in cells.
  • HY-12661A
    AMG PERK 44 Inhibitor ≥99.0%
    AMG PERK 44 is an orally active and highly selective PERK inhibitor with an IC50 of 6 nM. AMG PERK 44 has 1000-fold and 160-fold selectivity over GCN2 (IC50=7300 nM) and B-Raf (IC50 >1000 nM), respectively. AMG PERK 44 induces autophagy.
  • HY-137207
    MK-28 Activator 99.50%
    MK-28 is a potent and selective PERK activator. MK-28 exhibits remarkable pharmacokinetic properties and high BBB penetration in mice.
  • HY-12736
    GSK143 Inhibitor
    GSK143 is an orally active and highly selective spleen tyrosine kinase (SYK) inhibitor with a pIC50 of 7.5. GSK143 inhibits phosphorylated Erk (pErk: pIC50=7.1). GSK143 reduces inflammation and prevents recruitment of immune cells in the intestinal muscularis in mice.
  • HY-12736A
    GSK143 dihydrochloride Inhibitor
    GSK143 dihydrochloride is an orally active and highly selective spleen tyrosine kinase (SYK) inhibitor with a pIC50 of 7.5. GSK143 dihydrochloride inhibits phosphorylated Erk (pErk: pIC50=7.1). GSK143 dihydrochloride reduces inflammation and prevents recruitment of immune cells in the intestinal muscularis in mice.
  • HY-135220
    PERK-IN-2 Inhibitor
    PERK-IN-2 is a potent PERK inhibitor with an IC50 of 0.2 nM.
  • HY-130643
    PERK-IN-3 Inhibitor
    PERK-IN-3 is a potent PERK inhibitor with an IC50 of 7.4 nM.
Isoform Specific Products

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