Mitogen-activated protein kinase 3, also known as p44MAPK and ERK1, [5] is an enzyme that in humans is encoded by the MAPK3 gene. [6]
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. This kinase is activated by upstream kinases, resulting in its translocation to the nucleus where it phosphorylates nuclear targets. Alternatively spliced transcript variants encoding different protein isoforms have been described. [7]
It has been suggested that MAPK3, along with the gene IRAK1, is turned off by two microRNAs that were activated after the influenza A virus had been made to infect human lung cells. [8]
Pharmacological inhibition of ERK1/2 restores GSK3β activity and protein synthesis levels in a model of tuberous sclerosis. [9]
MAPK3 has been shown to interact with:
A mitogen-activated protein kinase is a type of protein kinase that is specific to the amino acids serine and threonine. MAPKs are involved in directing cellular responses to a diverse array of stimuli, such as mitogens, osmotic stress, heat shock and proinflammatory cytokines. They regulate cell functions including proliferation, gene expression, differentiation, mitosis, cell survival, and apoptosis.
Biological crosstalk refers to instances in which one or more components of one signal transduction pathway affects another. This can be achieved through a number of ways with the most common form being crosstalk between proteins of signaling cascades. In these signal transduction pathways, there are often shared components that can interact with either pathway. A more complex instance of crosstalk can be observed with transmembrane crosstalk between the extracellular matrix (ECM) and the cytoskeleton.
Mitogen-activated protein kinase 1, also known as ERK2, is an enzyme that in humans is encoded by the MAPK1 gene.
Mitogen-activated protein kinase 8 is a ubiquitous enzyme that in humans is encoded by the MAPK8 gene.
Dual specificity mitogen-activated protein kinase kinase 1 is an enzyme that in humans is encoded by the MAP2K1 gene.
Dual specificity mitogen-activated protein kinase kinase 2 is an enzyme that in humans is encoded by the MAP2K2 gene. It is more commonly known as MEK2, but has many alternative names including CFC4, MKK2, MAPKK2 and PRKMK2.
Ribosomal protein S6 kinase alpha-5 is an enzyme that in humans is encoded by the RPS6KA5 gene. This kinase, together with RPS6KA4, are thought to mediate the phosphorylation of histone H3, linked to the expression of immediate early genes.
Ribosomal protein S6 kinase alpha-2 is an enzyme that in humans is encoded by the RPS6KA2 gene.
Receptor-type tyrosine-protein phosphatase epsilon is an enzyme that in humans is encoded by the PTPRE gene.
Dual specificity phosphatase 6 (DUSP6) is an enzyme that in humans is encoded by the DUSP6 gene.
Protein tyrosine phosphatase non-receptor type 7 is an enzyme that in humans is encoded by the PTPN7 gene.
C-jun-amino-terminal kinase-interacting protein 3 is an enzyme that in humans is encoded by the MAPK8IP3 gene.
Protein tyrosine phosphatase receptor-type R is an enzyme that in humans is encoded by the PTPRR gene.
Dual specificity protein phosphatase 3 is an enzyme that in humans is encoded by the DUSP3 gene.
MAP kinase-activated protein kinase 3 is an enzyme that in humans is encoded by the MAPKAPK3 gene.
Dual specificity protein phosphatase 4 is an enzyme that in humans is encoded by the DUSP4 gene.
Dual specificity protein phosphatase 10 is an enzyme that in humans is encoded by the DUSP10 gene.
Dual specificity protein phosphatase 2 is an enzyme that in humans is encoded by the DUSP2 gene.
Dual specificity protein phosphatase 16 is an enzyme that in humans is encoded by the DUSP16 gene.
Dual specificity protein phosphatase 5 is an enzyme that in humans is encoded by the DUSP5 gene.