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Extracellular-signal-regulated kinase 1 (ERK1)
- Target
- ERK1
- Molecular classification
- Enzyme, Protein Kinase, Serine/threonine kinase, MAP kinase
01
Overview
Extracellular-signal-regulated kinase 1 (ERK1), also known as MAPK3, is a serine/threonine protein kinase and a key component of the mitogen-activated protein kinase (MAPK) signaling pathway. It mediates signal transduction from the cell surface to the nucleus in response to various extracellular stimuli, playing a role in cell proliferation, differentiation, adhesion, migration, and survival. ERK1 is activated by MEK1/2 via phosphorylation at Thr202/Tyr204. Dysregulation of the Ras-Raf-MEK-ERK pathway is implicated in cancer.
- Other names
- MAPK3Mitogen-activated protein kinase 3
02
Mechanism of action
ERK1 is phosphorylated and activated by MEK1/2, leading to downstream phosphorylation of numerous substrates, including transcription factors and regulatory proteins. Inhibitors targeting upstream kinases (e.g., BRAF) indirectly affect ERK1 activity.
03
Biological functions
Signal transductionCell proliferationCell differentiationCell adhesionCell migrationCell survivalApoptosisGene expression controlCell cycle progression
04
Disease associations
CancerDevelopmental disorders
05
Safety considerations
Inhibition of ERK pathway can lead to developmental defectsInhibitors may have limited clinical efficacy due to feedback loops and resistance mechanisms.
06
Interacting drugs
B-Raf inhibitors (targeting upstream kinases that regulate ERK1)
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