Synthetic phospho-peptide corresponding to residues surrounding Ser218 and 222 of Human MEK1 aa 200-249 / 393.
Product Specificity
Phospho-MEK1/2 (Ser218/222) [ST0490] Rabbit mAb detects endogenous levels of MEK1/2 only when activated by phosphorylation at Ser218/222.
Species Reactivity
Human, Mouse, Rat
Validated Applications
WB, IF-Cell, IF-Tissue, IHC-P, IP
Target Molecular Weight
Predicted band size: 43 kDa
Positive Control
NIH/3T3 treated with 200nM PMA for 30 minutes cell lysate, C6 treated with 200nM PMA for 30 minutes cell lysate, Hela cell lysate, A431 cell lysate, 293T cell lysate, NIH/3T3 cells treated with 200nM PMA for 30 minutes, Hela, HepG2, human tonsil tissue, human liver carcinoma tissue, human spleen tissue, human breast carcinoma tissue.
Conjugation
unconjugated
Clone Number
ST0490
Product Features
Form
Liquid
Concentration
1 mg/mL.(The concentration of this product may be batch-dependent)
Lot Concentration Lookup
Storage Instructions
Store at 2-8℃. Avoid freeze.
Storage Buffer
PBS (pH7.4).
Isotype
IgG
Purification Method
Protein A affinity purified.
Application Dilution
Target
Function
Activation of extracellular signal-regulated kinase (ERK) or mitogen-activated protein kinase by MEK (mitogen-activated protein kinase or extracellular signal-regulated kinase kinase) is an essential event in the mitogenic growth factor-induced signal transduction pathway. Phosphorylation of MEKs correlates with their ability to phosphorylate and activate ERKs. MEK1 and MEK2 can also be activated by autophosphorylation. Lipopolysaccharide activates many of the MAPK family members of the immediate upstream MAPK activator MEK1, MEK2, and MEK3. In plants, MEK can phosphorylate and activate MAPK, and that Tyr phosphorylation is critical for the catalytic activity of MAPK in plants.
Background References
1. Wortzel I., Seger R. The ERK cascade: distinct functions within various subcellular organelles. Genes Cancer 2:195-209(2011).
2. Bian Y., Song C., Cheng K., et al. An enzyme assisted RP-RPLC approach for in-depth analysis of human liver phosphoproteome. J. Proteomics 96:253-262(2014).
Sequence Similarity
Belongs to the protein kinase superfamily. STE Ser/Thr protein kinase family. MAP kinase kinase subfamily.
Tissue Specificity
Widely expressed, with extremely low levels in brain.
Post-translational Modification
Phosphorylation at Ser-218 and Ser-222 by MAP kinase kinase kinases (BRAF or MEKK1) positively regulates kinase activity. Also phosphorylated at Thr-292 by MAPK1/ERK2 and at Ser-298 by PAK. MAPK1/ERK2 phosphorylation of Thr-292 occurs in response to cellular adhesion and leads to inhibition of Ser-298 phosphorylation by PAK. Autophosphorylated at Ser-218 and Ser-222, autophosphosphorylation is promoted by NEK10 following UV irradiation.; Acetylation by Yersinia yopJ prevents phosphorylation and activation, thus blocking the MAPK signaling pathway.
This data was developed using ET1609-50, the same antibody clone in a different buffer formulation. Western blot analysis of Phospho-MEK1/2 (S218 + S222) on different lysates with Rabbit anti-Phospho-MEK1/2 (S218 + S222) antibody (ET1609-50) at 1/1,000 dilution.
Lane 1: NIH/3T3 cell lysate Lane 2: NIH/3T3 treated with 200nM PMA for 30 minutes cell lysate Lane 3: C6 cell lysate Lane 4: C6 treated with 200nM PMA for 30 minutes cell lysate Lane 5: NIH/3T3 treated with 200nM PMA for 30 minutes cell lysate, then the membrane treated with λpp for 1 hour Lane 6: C6 treated with 200nM PMA for 30 minutes cell lysate, then the membrane treated with λpp for 1 hour
Lysates/proteins at 20 µg/Lane.
Predicted band size: 43 kDa Observed band size: 43 kDa
Exposure time: 24 seconds;
4-20% SDS-PAGE gel.
Proteins were transferred to a PVDF membrane and blocked with 5% NFDM/TBST for 1 hour at room temperature. The primary antibody (ET1609-50) at 1/1,000 dilution was used in 5% NFDM/TBST at 4℃ overnight. Goat Anti-Rabbit IgG - HRP Secondary Antibody (HA1001) at 1/50,000 dilution was used for 1 hour at room temperature.
This data was developed using ET1609-50, the same antibody clone in a different buffer formulation. Western blot analysis of Phospho-MEK1/2 (S218 + S222) on different lysates with Rabbit anti-Phospho-MEK1/2 (S218 + S222) antibody (ET1609-50) at 1/500 dilution.
Lane 1: A431 cell lysate Lane 2: Hela cell lysate Lane 3: 293T cell lysate
Lysates/proteins at 10 µg/Lane. Exposure time: 1 minutes; ECL: K1801
Blocking: 5% BSA , 1 hour at room temperature Primary antibody: ET1609-50, 1/500 in 5% BSA at room temperature for 2 hours Secondary antibody: Goat Anti-Rabbit IgG - HRP Secondary Antibody (HA1001) at 1:50,000 dilution was used for 1 hour at room temperature
Predicted band size: 43 kDa Observed band size: 43 kDa
☑ Cell treatment (CT)
This data was developed using ET1609-50, the same antibody clone in a different buffer formulation. Western blot analysis of Phospho-MEK1/2 (S218 + S222) on Hela cell lysates.
Lane 1: Hela cells, whole cell lysate, 10ug/lane Lane 2/3: Hela cells treated with 200 nM PMA for 20 minutes, whole cell lysates, 10ug/lane Lane 4: Hela cells treated with 200 nM PMA for 20 minutes, then treated with 2.8ug/ul lambda-PP for 30 minutes, whole cell lysates, 10ug/lane
All lanes : Anti-Phospho-MEK1/2 (S218 + S222) antibody (ET1609-50) at 1/500 dilution. Anti-MEK1 antibody (ET1603-20) at 1/500 dilution. Anti-GAPDH antibody (ET1601-4) at 1/10,000 dilution. Goat Anti-Rabbit IgG H&L (HRP) (HA1001) at 1/200,000 dilution.
Predicted band size:43 kDa Observed band size:43 kDa
This data was developed using ET1609-50, the same antibody clone in a different buffer formulation. Immunocytochemistry analysis of NIH/3T3 cells treated with 200nM PMA for 30 minutes labeling Phospho-MEK1/2 (S218 + S222) with Rabbit anti-Phospho-MEK1/2 (S218 + S222) antibody (ET1609-50) at 1/100 dilution.
Cells were fixed in 4% paraformaldehyde for 20 minutes at room temperature, permeabilized with 0.1% Triton X-100 in PBS for 5 minutes at room temperature, then blocked with 1% BSA in 10% negative goat serum for 1 hour at room temperature. Cells were then incubated with Rabbit anti-Phospho-MEK1/2 (S218 + S222) antibody (ET1609-50) at 1/100 dilution in 1% BSA in PBST overnight at 4 ℃. Goat Anti-Rabbit IgG H&L (iFluor™ 488, HA1121) was used as the secondary antibody at 1/1,000 dilution. PBS instead of the primary antibody was used as the secondary antibody only control. Nuclear DNA was labelled in blue with DAPI.
Beta tubulin (M1305-2, red) was stained at 1/100 dilution overnight at +4℃. Goat Anti-Mouse IgG H&L (iFluor™ 594, HA1126) was used as the secondary antibody at 1/1,000 dilution.
This data was developed using ET1609-50, the same antibody clone in a different buffer formulation. ICC staining of Phospho-MEK1/2 (S218 + S222) in Hela cells (green). Formalin fixed cells were permeabilized with 0.1% Triton X-100 in TBS for 10 minutes at room temperature and blocked with 1% Blocker BSA for 15 minutes at room temperature. Cells were probed with the primary antibody (ET1609-50, 1/50) for 1 hour at room temperature, washed with PBS. Alexa Fluor®488 Goat anti-Rabbit IgG was used as the secondary antibody at 1/1,000 dilution. The nuclear counter stain is DAPI (blue).
This data was developed using ET1609-50, the same antibody clone in a different buffer formulation. ICC staining of Phospho-MEK1/2 (S218 + S222) in HepG2 cells (green). Formalin fixed cells were permeabilized with 0.1% Triton X-100 in TBS for 10 minutes at room temperature and blocked with 1% Blocker BSA for 15 minutes at room temperature. Cells were probed with the primary antibody (ET1609-50, 1/50) for 1 hour at room temperature, washed with PBS. Alexa Fluor®488 Goat anti-Rabbit IgG was used as the secondary antibody at 1/1,000 dilution. The nuclear counter stain is DAPI (blue).
This data was developed using ET1609-50, the same antibody clone in a different buffer formulation. Immunohistochemical analysis of paraffin-embedded human tonsil tissue using anti-Phospho-MEK1/2 (S218 + S222) antibody. The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 8.0-8.4) for 20 minutes.The tissues were blocked in 5% BSA for 30 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (ET1609-50, 1/50) for 30 minutes at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
This data was developed using ET1609-50, the same antibody clone in a different buffer formulation. Immunohistochemical analysis of paraffin-embedded human liver carcinoma tissue using anti-Phospho-MEK1/2 (S218 + S222) antibody. The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 8.0-8.4) for 20 minutes.The tissues were blocked in 5% BSA for 30 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (ET1609-50, 1/50) for 30 minutes at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
This data was developed using ET1609-50, the same antibody clone in a different buffer formulation. Immunohistochemical analysis of paraffin-embedded human spleen tissue using anti-Phospho-MEK1/2 (S218 + S222) antibody. The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 8.0-8.4) for 20 minutes.The tissues were blocked in 5% BSA for 30 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (ET1609-50, 1/50) for 30 minutes at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
This data was developed using ET1609-50, the same antibody clone in a different buffer formulation. Immunohistochemical analysis of paraffin-embedded human breast carcinoma tissue using anti-Phospho-MEK1/2 (S218 + S222) antibody. The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 8.0-8.4) for 20 minutes.The tissues were blocked in 5% BSA for 30 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (ET1609-50, 1/50) for 30 minutes at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
Please note: All products are "FOR RESEARCH USE ONLY AND ARE NOT INTENDED FOR DIAGNOSTIC OR THERAPEUTIC USE"