Phosphotyrosine ErbB2 / HER2 ELISA Kit (ab279788)
Key features and details
- Sample type: Cell Lysate
- Detection method: Colorimetric
- Assay type: Semi-quantitative
- Reacts with: Human
Overview
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Product name
Phosphotyrosine ErbB2 / HER2 ELISA Kit
See all ErbB2 / HER2 kits -
Detection method
Colorimetric -
Sample type
Cell Lysate -
Assay type
Semi-quantitative -
Assay duration
Multiple steps standard assay -
Species reactivity
Reacts with: Human -
Product overview
Phosphotyrosine ErbB2 / HER2 ELISA Kit (ab279788) is a very rapid, convenient, and sensitive assay kit that can monitor the activation or function of important biological pathways in human cell lysates. By determining phosphorylated ErbB2 / HER2 protein in your experimental model system, you can verify pathway activation in your cell lysates. You can simultaneously measure numerous different cell lysates without spending excess time and effort in performing a Western Blotting analysis.
This Sandwich ELISA kit is an in vitro enzyme-linked immunosorbent assay for the measurement of human phospho-ErbB2 / HER2. An anti-ErbB2 / HER2 antibody has been coated onto a 96-well plate. Samples are pipetted into the wells and phosphorylated and unphosphorylated ErbB2 / HER2 present in a sample is bound to the wells by the immobilized antibody. The wells are washed, and biotinylated anti-phosphotyrosine antibody is used to detect only tyrosine-phosphorylated protein. After washing away unbound antibody, HRP-conjugated streptavidin is pipetted to the wells. The wells are again washed, a TMB substrate solution is added to the wells and color develops in proportion to the amount of phospho-ErbB2 / HER2 bound. The Stop Solution changes the color from blue to yellow, and the intensity of the color is measured at 450 nm.
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Tested applications
Suitable for: Sandwich ELISAmore details -
Platform
Pre-coated microplate (12 x 8 well strips)
Properties
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Storage instructions
Store at -20°C. Please refer to protocols. -
Components 1 x 96 tests 20X Wash Buffer Concentrate 1 x 25ml 2X Cell lysate buffer 1 x 10ml 300X Streptavidin-Conjugated HRP 1 vial 5X Assay Diluent 1 x 15ml Biotinylated anti-phosphotyrosine antibody 2 vials Pan-ErbB2 / HER2 Coated Microplate 1 unit Positive Control - A431 cell lysate 1 vial Stop Solution 1 x 8ml TMB One-Step Substrate Reagent 1 x 12ml -
Research areas
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Function
Protein tyrosine kinase that is part of several cell surface receptor complexes, but that apparently needs a coreceptor for ligand binding. Essential component of a neuregulin-receptor complex, although neuregulins do not interact with it alone. GP30 is a potential ligand for this receptor. Regulates outgrowth and stabilization of peripheral microtubules (MTs). Upon ERBB2 activation, the MEMO1-RHOA-DIAPH1 signaling pathway elicits the phosphorylation and thus the inhibition of GSK3B at cell membrane. This prevents the phosphorylation of APC and CLASP2, allowing its association with the cell membrane. In turn, membrane-bound APC allows the localization of MACF1 to the cell membrane, which is required for microtubule capture and stabilization.
In the nucleus is involved in transcriptional regulation. Associates with the 5'-TCAAATTC-3' sequence in the PTGS2/COX-2 promoter and activates its transcription. Implicated in transcriptional activation of CDKN1A; the function involves STAT3 and SRC. Involved in the transcription of rRNA genes by RNA Pol I and enhances protein synthesis and cell growth. -
Tissue specificity
Expressed in a variety of tumor tissues including primary breast tumors and tumors from small bowel, esophagus, kidney and mouth. -
Involvement in disease
Hereditary diffuse gastric cancer
Glioma
Ovarian cancer
Lung cancer
Gastric cancer
Chromosomal aberrations involving ERBB2 may be a cause gastric cancer. Deletions within 17q12 region producing fusion transcripts with CDK12, leading to CDK12-ERBB2 fusion leading to truncated CDK12 protein not in-frame with ERBB2. -
Sequence similarities
Belongs to the protein kinase superfamily. Tyr protein kinase family. EGF receptor subfamily.
Contains 1 protein kinase domain. -
Post-translational
modificationsAutophosphorylated. Autophosphorylation occurs in trans, i.e. one subunit of the dimeric receptor phosphorylates tyrosine residues on the other subunit (Probable). Ligand-binding increases phosphorylation on tyrosine residues (PubMed:27134172). Signaling via SEMA4C promotes phosphorylation at Tyr-1248 (PubMed:17554007). Dephosphorylated by PTPN12 (PubMed:27134172). -
Cellular localization
Cytoplasm. Nucleus and Cell membrane. Cytoplasm, perinuclear region. Nucleus. Translocation to the nucleus requires endocytosis, probably endosomal sorting and is mediated by importin beta-1/KPNB1. - Information by UniProt
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Alternative names
- Verb b2 erythroblastic leukemia viral oncogene homolog 2, neuro/glioblastoma derived oncogene homolog
- C erb B2/neu protein
- CD340
see all -
Database links
- Entrez Gene: 2064 Human
- Omim: 164870 Human
- SwissProt: P04626 Human
- Unigene: 446352 Human
Images
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Positive Control
A431 cells were treated with EGF at 37°C for 20 min.
Solubilize cells at 4 x 107 cells/ml in lysis buffer.
Serial dilutions of lysates were analyzed in this ELISA.
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A431 cells treated with/without EGF.A431 cells were untreated or treated with EGF for 20 mins at 37degC.