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MAP3K3 / MEKK3
mitogen-activated protein kinase kinase kinase 3
MAP3K3 / MEKK3 is a 626-amino acid polypeptide that is 96.5% identical to mouse Mekk3. Its catalytic domain is closely related to those of several other kinases, including mouse Mekk2, tobacco NPK, and yeast Ste11. Northern blot analysis revealed a 4.6-kb transcript that appears to be ubiquitously expressed. This protein directly regulates the stress-activated protein kinase (SAPK) and extracellular signal-regulated protein kinase (ERK) pathways by activating SEK and MEK1/2 respectively; it does not regulate the p38 pathway. In cotransfection assays, it enhanced transcription from a nuclear factor kappa-B (NFKB)-dependent reporter gene, consistent with a role in the SAPK pathway. Alternatively spliced transcript variants encoding distinct isoforms have been observed.
| Gene Name: | mitogen-activated protein kinase kinase kinase 3 |
| Family/Subfamily: | Protein Kinase , MAP3K |
| Synonyms: | MAP3K3, MAPK/ERK kinase kinase 3, MAPKKK3, MEK kinase 3, MEKK3, MAP/ERK kinase kinase 3, MEKK 3 |
| Target Sequences: | NM_002401 NP_002392.2 Q99759 |
Publications (2)
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