A family of protein kinases located upstream of the MAP kinases and responsible for their activation has been identified. The prototype member of this family, designated MAP kinase kinase, or MEK-1, specifically phospho-rylates the MAP kinase regulatory threonine and tyrosine residues present in the Thr-Glu-Tyr motif of ERK. A second MEK family member, MEK-2, resem-bles MEK-1 in its substrate specificity. MEK-3 (or MKK-3) functions to activate p38 MAP kinase, and MEK-4 (also called SEK1 or MKK-4) activates both p38 and JNK MAP kinases. MEK-5 appears to specifically phosphory-late ERK5, whereas MEK-6 phosphorylates p38 and p38b. MEK-7 (or MKK-7)phosphorylates and activates the JNK signal transduction pathway. Han, J., et al. 1996. J. Biol. Chem. 271: 2886-2891.Jiang, Y., et al. 1996. J. Biol. Chem. 271: 17920-17926.Tournier, C., et al. 1997. Proc. Natl. Acad. Sci. USA94: 7337-7442. Holland, P.M., et al. 1997. J. Biol. Chem. 272: 24994-24998.
Host
Rabbit
Immunogen
Peptide sequence around aa. 311-315(K-T-Y-V-G ) derived from Rat MEK5.
Raised In
Rabbit
Reactivity
Human, Mouse, Rat
Regulatory
RUO
Relevance
A family of protein kinases located upstream of the MAP kinases and responsible for their activation has been identified. The prototype member of this family, designated MAP kinase kinase, or MEK-1, specifically phospho-rylates the MAP kinase regulatory threonine and tyrosine residues present in the Thr-Glu-Tyr motif of ERK. A second MEK family member, MEK-2, resem-bles MEK-1 in its substrate specificity. MEK-3 (or MKK-3) functions to activate p38 MAP kinase, and MEK-4 (also called SEK1 or MKK-4) activates both p38 and JNK MAP kinases. MEK-5 appears to specifically phosphory-late ERK5, whereas MEK-6 phosphorylates p38 and p38b. MEK-7 (or MKK-7)phosphorylates and activates the JNK signal transduction pathway.
Han, J., et al. 1996. J. Biol. Chem. 271: 2886-2891. Jiang, Y., et al. 1996. J. Biol. Chem. 271: 17920-17926. Tournier, C., et al. 1997. Proc. Natl. Acad. Sci. USA94: 7337-7442. Holland, P.M., et al. 1997. J. Biol. Chem. 272: 24994-24998.
Species
Rattus Norvegicus (Rat)
Specificity
The antibody detects endogenous level of total MEK5 protein.
Subcellular Location
Isoform Beta: Cytoplasm, cytosol, SUBCELLULAR LOCATION: Isoform Alpha-1: Membrane, Note=The alternatively spliced exon in alpha isoform resemble conserved sequences that mediate interactions with the cytoskeleton, thereby explaining the differential localization, SUBCELLULAR LOCATION: Isoform Alpha-2: Membrane
Acts as a scaffold for the formation of a ternary MAP3K2/MAP3K3-MAP3K5-MAPK7 signaling complex. Activation of this pathway appears to play a critical role in protecting cells from stress-induced apoptosis, neuronal survival and cardiac development and angiogenesis (By similarity).
Pathway
MAPK signaling pathway Gap junction Neurotrophin signaling pathway
Protein Families
Protein kinase superfamily, STE Ser/Thr protein kinase family, MAP kinase kinase subfamily
Tissue Specificity
MEK5 beta is ubiquitously distributed with highest levels in the liver, whereas MEK5 alpha is expressed only in liver and brain.
Buffer
Supplied at 1.0mg/mL in phosphate buffered saline (without Mg2+ and Ca2+), pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol.
Form
Supplied at 1.0mg/mL in phosphate buffered saline (without Mg2+ and Ca2+), pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol.
Format
liquid
Purification
Antibodies were produced by immunizing rabbits with synthetic peptide and KLH conjugates. Antibodies were purified by affinity-chromatography using epitope-specific peptide
Purity
Antibodies were produced by immunizing rabbits with synthetic peptide and KLH conjugates. Antibodies were purified by affinity-chromatography using epitope-specific peptide
Storage
Upon receipt, store at -20°C or -80°C. Avoid repeated freeze.