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Phospho-STAT3(S727) Antibody

Peptide Affinity Purified Rabbit Polyclonal Antibody (Pab)

  • IF - Phospho-STAT3(S727) Antibody AP3260a
    Fluorescent confocal image of SY5Y cells stained with phospho-STAT3-S727 antibody. SY5Y cells were fixed with 4% PFA (20 min), permeabilized with Triton X-100 (0.2%, 30 min). Cells were then incubated with AP3260a phospho-STAT3-S727 primary antibody (1:200, 2 h at room temperature). For secondary antibody, Alexa Fluor® 488 conjugated donkey anti-rabbit antibody (green) was used (1:1000, 1h). Nuclei were counterstained with Hoechst 33342 (blue) (10 μg/ml, 5 min). Note the highly specific localization of the phospho-STAT3 immunosignal mainly to the nucleus, supported by Human Protein Atlas Data (
  • WB - Phospho-STAT3(S727) Antibody AP3260a
    The Phospho-STAT3-S727 Pab (Cat. #3260a) is used in western blot to detect Ser727-phosphorylated STAT3 in mouse liver tissue lysates collected before (-) or after (+) stimulation obtained by IL-6 injection in mouse portal vein. Data is kindly provided by Drs. E. Bard-Chapeau and G-S. Feng from the Burnham Institute (La Jolla, CA).
  • WB - Phospho-STAT3(S727) Antibody AP3260a
    The phospho-STAT3-Ser727 Pab (Cat. #AP3260a) is used in Western blot to detect Ser727-phosphorylated STAT3 in HL-60 tissue lysates collected before (-) or after (+) stimulation obtained by IFN-a.
  • IHC-P - Phospho-STAT3(S727) Antibody AP3260a
    Formalin-fixed and paraffin-embedded human cancer tissue reacted with the primary antibody, which was peroxidase-conjugated to the secondary antibody, followed by AEC staining. This data demonstrates the use of this antibody for immunohistochemistry; clinical relevance has not been evaluated. BC = breast carcinoma; HC = hepatocarcinoma.
Product Information
  • Applications Legend:
  • WB=Western Blot
  • IHC=Immunohistochemistry
  • IHC-P=Immunohistochemistry (Paraffin-embedded Sections)
  • IHC-F=Immunohistochemistry (Frozen Sections)
  • IF=Immunofluorescence
  • FC=Flow Cytopmetry
  • IC=Immunochemistry
  • ICC=Immunocytochemistry
  • IP=Immunoprecipitation
  • DB=Dot Blot
  • CHIP=Chromatin Immunoprecipitation
  • FA=Fluorescence Assay
  • IEM=Immunoelectronmicroscopy
  • EIA=Enzyme Immunoassay
Primary Accession P40763
Reactivity Human, Mouse
Host Rabbit
Clonality Polyclonal
Isotype Rabbit Ig
Calculated MW 88068 Da
Additional Information
Gene ID 6774
Other Names Signal transducer and activator of transcription 3, Acute-phase response factor, STAT3, APRF
Target/Specificity This STAT3 Antibody is generated from rabbits immunized with a KLH conjugated synthetic phosphopeptide corresponding to amino acid residues surrounding S727 of human STAT3.
Dilution IF~~1:200
Format Purified polyclonal antibody supplied in PBS with 0.09% (W/V) sodium azide. This antibody is purified through a protein A column, followed by peptide affinity purification.
StorageMaintain refrigerated at 2-8°C for up to 2 weeks. For long term storage store at -20°C in small aliquots to prevent freeze-thaw cycles.
PrecautionsPhospho-STAT3(S727) Antibody is for research use only and not for use in diagnostic or therapeutic procedures.
Protein Information
Name STAT3
Synonyms APRF
Function Signal transducer and transcription activator that mediates cellular responses to interleukins, KITLG/SCF and other growth factors. May mediate cellular responses to activated FGFR1, FGFR2, FGFR3 and FGFR4. Binds to the interleukin-6 (IL-6)- responsive elements identified in the promoters of various acute- phase protein genes. Activated by IL31 through IL31RA. Cytoplasmic STAT3 represses macroautophagy by inhibiting EIF2AK2/PKR activity. Plays an important role in host defense in methicillin-resistant S.aureus lung infection by regulating the expression of the antimicrobial lectin REG3G (By similarity).
Cellular Location Cytoplasm. Nucleus. Note=Shuttles between the nucleus and the cytoplasm. Translocated into the nucleus upon tyrosine phosphorylation and dimerization, in response to signaling by activated FGFR1, FGFR2, FGFR3 or FGFR4. 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 Identified in a complex with LYN and PAG1
Tissue Location Heart, brain, placenta, lung, liver, skeletal muscle, kidney and pancreas
Research Areas
Citations (0)

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STAT3 is a member of the STAT protein family. In response to cytokines and growth factors, STAT family members are phosphorylated by the receptor associated kinases, and then form homo- or heterodimers that translocate to the cell nucleus where they act as transcription activators. This protein is activated through phosphorylation in response to various cytokines and growth factors including IFNs, EGF, IL5, IL6, HGF, LIF and BMP2. It mediates the expression of a variety of genes in response to cell stimuli, and thus plays a key role in many cellular processes such as cell growth and apoptosis. The small GTPase Rac1 has been shown to bind and regulate the activity of this protein. PIAS3 protein is a specific inhibitor of this protein.


References for protein:
1.Schick, N., et al., J. Biol. Chem. 279(37):38787-38796 (2004).
2.Wang, H., et al., Lab. Invest. 84(8):941-951 (2004).
3.Kato, T., et al., J. Biol. Chem. 279(30):31076-31080 (2004).
4. Ivanova, A.V., et al., J. Mol. Biol. 340(4):641-653 (2004).
5.Park, J., et al., Biochem. Biophys. Res. Commun. 320(1):279-285 (2004).
References for SY5Y (SH-SY5Y; ATCC#CRL-2266): 1. Ross RA, et al. Coordinate morphological and biochemical interconversion of human neuroblastoma cells. J. Natl. Cancer Inst. 71: 741-749, 1983. [PubMed: 6137586]; 2. Biedler JL, et al. Multiple neurotransmitter synthesis by human neuroblastoma cell lines and clones. Cancer Res. 38: 3751-3757, 1978. [PubMed: 29704].

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$ 295.00
$ 99.00
Cat# AP3260a
(40 western blots)
Availability: In Stock
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