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X-ray structure of the ERK2 MAP kinase in its active form. Phosphorylated residues are displayed in red. Rendering based on pdb entry 2ERK. Mitogen-activated protein kinases are catalytically inactive in their base form. In order to become active, they require (potentially multiple) phosphorylation events in their activation loops.
Mitogen Activated Protein (MAP) kinase kinase kinase (MAPKKK, [1] MKKK, [2] M3K, [3] or, MAP3K [4]) is a serine/threonine-specific protein kinase which acts upon MAP kinase kinase. Subsequently, MAP kinase kinase activates MAP kinase. Several types of MAPKKK can exist but are mainly characterized by the MAP kinases they activate.
The activators of p38 (MKK3 and MKK6), JNK (MKK4 and MKK7), and ERK (MEK1 and MEK2) define independent MAP kinase signal transduction pathways. [1] The acronym MEK derives from M APK/ E RK K inase. [ 2 ]
The Extracellular Signal-Regulated Kinases; MAP Kinase Resource Archived 2021-04-15 at the Wayback Machine. Extracellular+Signal-Regulated+MAP+Kinases at the U.S. National Library of Medicine Medical Subject Headings (MeSH) MAPK1; MAPK3 Info with links in the Cell Migration Gateway Archived 2014-12-11 at the Wayback Machine
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The protein encoded by this gene is a member of the mitogen-activated protein kinase (MAP kinase) family. MAP kinases, also known as extracellular signal-regulated kinases (ERKs), act in a signaling cascade that regulates various cellular processes such as proliferation, differentiation, and cell cycle progression in response to a variety of extracellular signals.
Oxidative stress is the most powerfully specific stress activating p38 MAPK. [7] Abnormal activity (higher or lower than physiological) of p38 has been implicated in pathological stresses in several tissues, that include neuronal, [8] [9] [10] bone, [11] lung, [12] cardiac and skeletal muscle, [13] [14] red blood cells, [15] and fetal tissues. [16]
This gene encodes a member of the Ser/Thr protein kinase family. This kinase is regulated through direct phosphorylation by p38 MAP kinase.In conjunction with p38 MAP kinase, this kinase is known to be involved in many cellular processes including stress and inflammatory responses, nuclear export, gene expression regulation and cell proliferation.