Anti-STAT3 (phospho Y705) antibody [EP2147Y] (ab76315)


  • Product nameAnti-STAT3 (phospho Y705) antibody [EP2147Y]
    See all STAT3 primary antibodies
  • Description
    Rabbit monoclonal [EP2147Y] to STAT3 (phospho Y705)
  • Tested applicationsWB, IP, IHC-P, ICCmore details
  • Species reactivity
    Reacts with: Mouse, Rat, Human
  • Immunogen

    A synthetic phospho-peptide corresponding to residues surrounding tyrosine 705 of human STAT3.

  • Positive control
    • HeLa cell lysate treated with alpha-interferon. HeLa cells. Human colon adenocarcinoma tissue.
  • General notes

    Produced using Abcam’s RabMAb® technology. RabMAb® technology is covered by the following U.S. Patents, No. 5,675,063 and/or 7,429,487.

    A 40 µl trial size is available to purchase for this antibody.



Our Abpromise guarantee covers the use of ab76315 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
WB 1/10000 - 1/20000. Predicted molecular weight: 88 kDa.Can be blocked with STAT3 (phospho Y705) peptide (ab179551).
IP 1/40.
IHC-P 1/100 - 1/250. Perform heat mediated antigen retrieval before commencing with IHC staining protocol.
ICC 1/100 - 1/250.
  • Application notesIs unsuitable for Flow Cyt.
  • Target

    • FunctionTranscription factor that binds to the interleukin-6 (IL-6)-responsive elements identified in the promoters of various acute-phase protein genes. Activated by IL31 through IL31RA.
    • Tissue specificityHeart, brain, placenta, lung, liver, skeletal muscle, kidney and pancreas.
    • Involvement in diseaseDefects in STAT3 are the cause of hyperimmunoglobulin E recurrent infection syndrome autosomal dominant (AD-HIES) [MIM:147060]; also known as hyper-IgE syndrome or Job syndrome. AD-HIES is a rare disorder of immunity and connective tissue characterized by immunodeficiency, chronic eczema, recurrent Staphylococcal infections, increased serum IgE, eosinophilia, distinctive coarse facial appearance, abnormal dentition, hyperextensibility of the joints, and bone fractures.
    • Sequence similaritiesBelongs to the transcription factor STAT family.
      Contains 1 SH2 domain.
    • Post-translational
      Tyrosine phosphorylated upon stimulation with EGF (By similarity). Tyrosine phosphorylated in response to IL-6, IL-11, CNTF, LIF, CSF-1, EGF, PDGF, IFN-alpha and OSM. Phosphorylated on serine upon DNA damage, probably by ATM or ATR. Serine phosphorylation is important for the formation of stable DNA-binding STAT3 homodimers and maximal transcriptional activity. ARL2BP may participate in keeping the phosphorylated state of STAT3 within the nucleus.
    • Cellular localizationCytoplasm. Nucleus. Shuttles between the nucleus and the cytoplasm. Constitutive nuclear presence is independent of tyrosine phosphorylation. Predominantly present in the cytoplasm without stimuli. Upon leukemia inhibitory factor (LIF) stimulation, accumulates in the nucleus. The complex composed of BART and ARL2 plays an important role in the nuclear translocation and retention of STAT3.
    • Information by UniProt
    • Database links
    • Alternative names
      • 1110034C02Rik antibody
      • Acute Phase Response Factor antibody
      • Acute-phase response factor antibody
      • APRF antibody
      • AW109958 antibody
      • DNA binding protein APRF antibody
      • FLJ20882 antibody
      • HIES antibody
      • MGC16063 antibody
      • Signal transducer and activator of transcription 3 (acute phase response factor) antibody
      • Signal transducer and activator of transcription 3 antibody
      • Signal Transductor and Activator of Transcription 3 antibody
      • STAT 3 antibody
      • Stat3 antibody
      • STAT3_HUMAN antibody
      see all

    Anti-STAT3 (phospho Y705) antibody [EP2147Y] images

    • HeLa cells with ab76315 at 1/100 dilution.
    • Human colon carcinoma tissue stained with ab76315 at 1/100 dilution.
    • All lanes : Anti-STAT3 (phospho Y705) antibody [EP2147Y] (ab76315) at 1/20000 dilution

      Lane 1 : HeLa cell lysate
      Lane 2 : HeLa cell lysate, treated with alpha interferon

      Lysates/proteins at 10 µg per lane.

      Goat anti-rabbit-HRP at 1/1000 dilution
      developed using the ECL technique

      Predicted band size : 88 kDa
      Observed band size : 75 kDa (why is the actual band size different from the predicted?)
    • ab76315 staining STAT3 (phospho Y705) in MDA-MB-231 cells treated with stattic (ab120952), by ICC/IF. Decrease in STAT3 (phospho Y705) expression correlates with increased concentration of stattic as described in literature.
      The cells were incubated at 37°C for 2h in media containing different concentrations of ab120952 (stattic) in DMSO, fixed with 4% formaldehyde for 10 minutes at room temperature and blocked with PBS containing 10% goat serum, 0.3 M glycine, 1% BSA and 0.1% tween for 2h at room temperature. Staining of the treated cells with ab76315 (5 µg/ml) was performed overnight at 4°C in PBS containing 1% BSA and 0.1% tween. A DyLight 488 goat anti-rabbit polyclonal antibody (ab96899) at 1/250 dilution was used as the secondary antibody. Nuclei were counterstained with DAPI and are shown in blue.

    • developed using the ECL technique

      Performed under reducing conditions.

      Predicted band size : 88 kDa

    References for Anti-STAT3 (phospho Y705) antibody [EP2147Y] (ab76315)

    This product has been referenced in:
    • Wu J  et al. EGFR-STAT3 signaling promotes formation of malignant peripheral nerve sheath tumors. Oncogene 33:173-80 (2014). IHC ; Mouse . Read more (PubMed: 23318430) »
    • Turkington RC  et al. Fibroblast growth factor receptor 4 (FGFR4): a targetable regulator of drug resistance in colorectal cancer. Cell Death Dis 5:e1046 (2014). WB ; Human . Read more (PubMed: 24503538) »

    See all 16 Publications for this product

    Product Wall

    Abcam guarantees this product to work in the species/application used in this Abreview.
    Application Western blot
    Sample Human Cell lysate - whole cell (peripheral blood CD19+ B cells)
    Loading amount 200 µg
    Specification peripheral blood CD19+ B cells
    Treatment (1) Untreated (2) 100 ng recombinant hIL-10 for 24hours
    Gel Running Conditions Reduced Denaturing (10 % SDS-PAGE)
    Blocking step Milk as blocking agent for 1 hour(s) and 0 minute(s) · Concentration: 5% · Temperature: 20°C

    Abcam user community

    Verified customer

    Submitted Jul 07 2010

    Application Western blot
    Loading amount 25 µg
    Gel Running Conditions Reduced Denaturing (10%)
    Sample Spermophilus tridecemlineatus Tissue lysate - whole (brain)
    Specification brain
    Blocking step BSA as blocking agent for 1 hour(s) and 0 minute(s) · Concentration: 3% · Temperature: 4°C

    Abcam user community

    Verified customer

    Submitted Oct 29 2014

    Application Western blot
    Loading amount 25 µg
    Gel Running Conditions Reduced Denaturing (4–15%)
    Sample Mouse Tissue lysate - whole (Lung)
    Specification Lung
    Blocking step BSA as blocking agent for 15 hour(s) and 0 minute(s) · Concentration: 5% · Temperature: 4°C

    Abcam user community

    Verified customer

    Submitted Jul 30 2014

    Thank you for your enquiry.

    I can confirm that for the western blot image on the datasheet for ab76315, the HeLa cellswere serum-starved overnight, and then treated with 1000 U/ml IFN alpha for 15min at 37 degrees C.

    This may requ...

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    Thank you for contacting us. Please be advised that the ab76315 is not a purified antibody; it is in tissue culture supernatant which may contains other proteins also. We generally do not determine the antibody concentration that is prepared as tissue ...

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