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Cell Signaling Phospho-P44/42 Mapk (Erk1) (Tyr204)/(Erk2) (Tyr187) (D1h6g) Mouse mAb (BSA And Azide Free)
List Price $898.00 Your Price $898.00
Cell Signaling Phospho-P44/42 Mapk (Erk1) (Tyr204)/(Erk2) (Tyr187) (D1h6g) Mouse mAb (BSA And Azide Free) - CSSPQ (Additional S&H or Hazmat Fees May Apply)
NETA PART: CSSPQ-89967SF
MFG.PART: 89967SF
UNSPSC: 12352203
Manufacturer: Cell Signaling
| Size | 100 µg |
| Reactivity | H M R Mk |
| Sensitivity | Endogenous |
| Molecular Weight (kDa) | 42, 44 |
| Source/Isotype | Mouse IgG2a |
| Application/Dilution | {} |
| Storage | Supplied in 1X PBS, BSA and Azide Free.For standard formulation of this product see product #5726 |
| Specificity/Sensitivity | Phospho-p44/42 MAPK (Erk1) (Tyr204)/(Erk2) (Tyr187) (D1H6G) Mouse mAb (BSA and Azide Free) recognizes endogenous levels of p44/42 MAPK/Erk protein when phosphorylated at Tyr204 of p44 MAPK/Erk1 (Tyr187 of p42 MAPK/Erk2). This antibody detects dual-phosphorylated p44 MAPK/Erk1 (Thr202/Tyr204)/p42 MAPK/Erk2 (Thr185/Tyr187), but does not detect threonine mono-phosphorylated p44/42 MAPK/Erk. This antibody does not cross-react with any other MAP kinases. |
| Species Reactivity | Human, Mouse, Rat, Monkey |
| Source/Purification | Monoclonal antibody is produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Tyr187 of human Erk2 protein. |
| Background | Mitogen-activated protein kinases (MAPKs) are a widely conserved family of serine/threonine protein kinases involved in many cellular programs, such as cell proliferation, differentiation, motility, and death. The p44/42 MAPK (Erk1/2) signaling pathway can be activated in response to a diverse range of extracellular stimuli, including mitogens, growth factors, and cytokines (1-3), and research investigators consider it an important target in the diagnosis and treatment of cancer (4). Upon stimulation, a sequential three-part protein kinase cascade is initiated, consisting of a MAP kinase kinase kinase (MAPKKK or MAP3K), a MAP kinase kinase (MAPKK or MAP2K), and a MAP kinase (MAPK). Multiple p44/42 MAP3Ks have been identified, including members of the Raf family, as well as Mos and Tpl2/COT. MEK1 and MEK2 are the primary MAPKKs in this pathway (5,6). MEK1 and MEK2 activate p44 and p42 through phosphorylation of activation loop residues Thr202/Tyr204 and Thr185/Tyr187, respectively. Several downstream targets of p44/42 have been identified, including p90RSK (7) and the transcription factor Elk-1 (8,9). p44/42 are negatively regulated by a family of dual-specificity (Thr/Tyr) MAPK phosphatases, known as DUSPs or MKPs (10), along with MEK inhibitors, such as U0126 and PD98059.The "activation loop" of MAPK family members contains two phosphorylation sites, typically a threonine and a tyrosine separated by a single amino acid, designated the T-x-Y motif. Phosphorylation on both residues has been shown to be required for full activation of kinase activity, but it has been appreciated for some time that mono-phosphorylation of the T-x-Y motif occurs, resulting in partial activation of catalytic acitvity and priming for subsequent, dual-phosphorylation (11,12). The crystal structures of non-, mono-, and dual-phospho MAPK/Erk demonstrate that each phospho-isomer assumes an independent conformation (13). In addition, mono-phosphorylation of MAPK/Erk2 at Tyr187 reveals that phosphorylation at this site serves to configure the ATP binding site, while phosphorylation of both Tyr and Thr residues is required to completely stabilize the substrate binding site (14). Furthermore, T-x-Y mutational analysis of members of the Erk and p38 MAP kinases appears to suggest that mono-phosphorylation of the T-x-Y motif confers differential activity and substrate preference (15,16). Taken together, these data suggest an important and underappreciated role for Thr- and Tyr- mono-phosphorylation of the T-x-Y motif among MAP kinases. |
| SKU | CSSPQ-89967SF |
|---|---|
| Supplier Part Number | 89967SF |
| UM | EA |
| UNSPSC | 12352203 |
| Manufacturer | Cell Signaling |
| MSDS URL | Click here |
| Temperature | -20C |
| CountryOfOrigin | United States |
| ProductLine | CSSPQ |
| Qty | 1 |
| MinOrderQty | 1 |
| Weight | 7.000000 |
| Lead Time | 5 |
| Hazardous | N |
| Energy Star | No |
| Green | No |
| Controlled | N |