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

PERK

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

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 (24):

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 99.37%
    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 99.17%
    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-101991
    ML291
    Activator
    ML291 is a UPR (unfolded protein response)-inducing sulfonamidebenzamide. ML291 overwhelms the adaptive capacity of the UPR and induces apoptosis in a variety of solid cancer models. ML291 can activate the PERK/eIF2a/CHOP (apoptotic) arm of the UPR and reduce leukemic cell burden.
  • HY-145835A
    (S)-PERK-IN-5
    Inhibitor
    (S)-PERK-IN-5 is the S-enantiomer of PERK-IN-5. (S)-PERK-IN-5 (example 39) is a PERK inhibitor, with an IC50 of 0.101-0.250 μM.
  • HY-N3737
    Derrone
    Inducer
    Derrone, a prenylated isoflavones, is an Aurora kinase inhibitor, with IC50 values of 6 and 22.3 μM against Aurora B and Aurora A, respectively. Derrone shows anti-tumor activity.
  • 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-139612
    JDQ-443
    Inhibitor 98.94%
    JDQ-443 is an orally active, potent, selective, and covalent KRAS G12C inhibitor (extracted from patent WO2021120890A1). JDQ-443 shows antitumor activity.
  • HY-145835
    PERK-IN-5
    Inhibitor 99.40%
    PERK-IN-5 is a highly potent, selectively and orally bioavailable PERK inhibitor (IC50s of 2 and 9 nM for PERK and p-eIF2α, respectively). PERK-IN-5 can significantly inhibit tumor growth in the 786-O renal cell carcinoma xenograft tumor model.
  • HY-137813
    PERK-IN-4
    Inhibitor 98.09%
    PERK-IN-4 is a potent and selective PERK (protein kinase R (PKR)-like endoplasmic reticulum kinase) inhibitor with an IC 50 of 0.3 nM. PERK is activated in response to a variety of endoplasmic reticulum stresses implicated in numerous disease states.
  • HY-137813S
    PERK-IN-4-d3
    Inhibitor
    PERK-IN-4-d3 is the deuterium labeled PERK-IN-4. PERK-IN-4 is a potent and selective PERK (protein kinase R (PKR)-like endoplasmic reticulum kinase) inhibitor with an IC 50 of 0.3 nM. PERK is activated in response to a variety of endoplasmic reticulum stresses implicated in numerous disease states.
  • HY-144323
    YF135
    Inhibitor
    YF135 is an efficient and reversible-covalent KRASG12C PROTAC. YF135 is designed and synthesized by tethering KRAS G12C inhibitor 48 (compound 6d) as the ligand, and basing on the scaffold of MRTX849 linkage VHL ligand. YF135 significantly induces the degradation of KRASG12C in a reversible manner and decreases phospho-ERK level through the E3 ligase VHL mediated proteasome pathway.
  • 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 99.73%
    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-144693
    MEK/PI3K-IN-2
    Inhibitor
    MEK/PI3K-IN-2 (compound 6s) is a potent MEK/PI3K inhibitor, with IC50 values of 352 nM (MEK1), 107 nM (PI3Kα), and 137 nM (PI3Kδ), respectively. MEK/PI3K-IN-2 suppresses pAKT and pERK1/2 levels. MEK/PI3K-IN-2 shows anti-proliferative activity against tumor cell lines.
  • HY-135220
    PERK-IN-2
    Inhibitor
    PERK-IN-2 is a potent PERK inhibitor with an IC50 of 0.2 nM.
  • HY-18318
    Takeda-6D
    Inhibitor
    Takeda-6D (compound 6d) is an orally active and potent BRAF/VEGFR2 inhibitor, with IC50 values of 7.0 and 2.2 nM, respectively. Takeda-6D shows antiangiogenesis by suppressing the VEGFR2 pathway in 293/KDR and VEGF-stimulated HUVEC cells.Takeda-6D shows significant suppression of ERK1/2 phosphorylation. Takeda-6D shows antitumor activity.
  • HY-144692
    MEK/PI3K-IN-1
    Inhibitor
    MEK/PI3K-IN-1 (compound 6r) is a potent MEK/PI3K inhibitor, with IC50 values of 124 nM (MEK1), 130 nM (PI3Kα), and 236 nM (PI3Kδ), respectively. MEK/PI3K-IN-1 suppresses pAKT and pERK1/2 levels. MEK/PI3K-IN-1 shows anti-proliferative activity against tumor cell lines.