Key features and details
- Produced recombinantly (animal-free) for high batch-to-batch consistency and long term security of supply
- Rabbit monoclonal [EPR2324Y] to ErbB2 / HER2 (phospho Y877)
- Suitable for: Dot blot, WB, Flow Cyt, ICC/IF
- Reacts with: Human
Product nameAnti-ErbB2 / HER2 (phospho Y877) antibody [EPR2324Y]
See all ErbB2 / HER2 primary antibodies
DescriptionRabbit monoclonal [EPR2324Y] to ErbB2 / HER2 (phospho Y877)
ab75873 detects ErbB2 / HER2 phosphorylated at tyrosine 877.
Tested applicationsSuitable for: Dot blot, WB, Flow Cyt, ICC/IFmore details
Unsuitable for: IHC-P or IP
Species reactivityReacts with: Human
within Human ErbB2/ HER2 (phospho Y877). The exact sequence is proprietary.
- HeLa and SKBR3 cell lysates treated with EGF. SKBR3 cells.
Mouse, Rat: We have preliminary internal testing data to indicate this antibody may not react with these species. Please contact us for more information.
This product is a recombinant monoclonal antibody, which offers several advantages including:
- - High batch-to-batch consistency and reproducibility
- - Improved sensitivity and specificity
- - Long-term security of supply
- - Animal-free production
Our RabMAb® technology is a patented hybridoma-based technology for making rabbit monoclonal antibodies. For details on our patents, please refer to RabMAb® patents.
Storage instructionsShipped at 4°C. Store at -20°C. Stable for 12 months at -20°C.
Dissociation constant (KD)KD = 8.30 x 10 -10 M Learn more about KD
Storage bufferpH: 7.20
Preservative: 0.05% Sodium azide
Constituents: 0.1% BSA, 40% Glycerol, 9.85% Tris glycine, 50% Tissue culture supernatant
Concentration information loading...
PurityTissue culture supernatant
Our Abpromise guarantee covers the use of ab75873 in the following tested applications.
The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
|WB||1/500 - 1/1000. Detects a band of approximately 180 kDa (predicted molecular weight: 138 kDa).|
|Flow Cyt||Use at an assay dependent concentration.|
|ICC/IF||1/50 - 1/100.|
FunctionProtein 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 specificityExpressed in a variety of tumor tissues including primary breast tumors and tumors from small bowel, esophagus, kidney and mouth.
Involvement in diseaseHereditary diffuse 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 similaritiesBelongs to the protein kinase superfamily. Tyr protein kinase family. EGF receptor subfamily.
Contains 1 protein kinase domain.
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 localizationCytoplasm. 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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All lanes : Anti-ErbB2 / HER2 (phospho Y877) antibody [EPR2324Y] (ab75873) at 1/1000 dilution
Lane 1 : HeLa cell lysate, untreated
Lane 2 : HeLa cell lysate, treated with EGF
Lane 3 : SKBR3 cell lysate, untreated
Lane 4 : SKBR3 cell lysate, treated with EGF
Lysates/proteins at 10 µg per lane.
All lanes : HRP labelled goat anti-rabbit at 1/2000 dilution
Predicted band size: 138 kDa
Observed band size: 180 kDa why is the actual band size different from the predicted?
Dot blot analysis of ErbB 2 (pY877) peptide (Lane 1) and ErbB 2 non-phospho peptide (Lane 2) labelling ErbB 2 (phospho Y877) with ab75873 at a dilution of 1/1000. A Peroxidase-conjugated goat anti-rabbit IgG (H+L) was used as the secondary antibody at a dilution of 1/2500.
Blocking and dilution buffer: 5% NFDM/TBST.
Exposure time: 3 minutes.
Flow Cytometry analysis of A431 (human epidermoid carcinoma) untreated/treated with 200 ng/ml EGF for 15 minutes labeling ErbB 2 with unpurified ab75873 at 1/20 (red). Cells were fixed with 4% paraformaldehyde and permeabilised with 90% methanol. A Goat Anti-Rabbit IgG H&L (Alexa Fluor® 488) (ab150077) (1/2000 dilution) was used as the secondary antibody. Rabbit IgG, monoclonal [EPR25A] - Isotype Control (ab172730) (Black) was used as the isotype control, cells without incubation with primary antibody and secondary antibody (Blue) were used as the unlabeled control.
ab75873 at 1/50 dilution staining ErbB 2 in SKBR3 cells by Immunofluorescence.
Equilibrium disassociation constant (KD)
Learn more about KD
Click here to learn more about KD
ab75873 has been referenced in 1 publication.
- Zahari MS et al. Activating Mutations in PIK3CA Lead to Widespread Modulation of the Tyrosine Phosphoproteome. J Proteome Res 14:3882-3891 (2015). PubMed: 26267517