Overview

  • Product name
    Anti-HSF1 antibody [EP1710Y]
    See all HSF1 primary antibodies
  • Description
    Rabbit monoclonal [EP1710Y] to HSF1
  • Specificity
    This antibody reacts with HSF1.
  • Tested applications
    Suitable for: WB, IP, Flow Cyt, IHC-P, ICC/IFmore details
  • Species reactivity
    Reacts with: Human
  • Immunogen

    Synthetic peptide (the amino acid sequence is considered to be commercially sensitive) within Human HSF1 aa 450 to the C-terminus (C terminal). The exact sequence is proprietary.

  • Positive control
    • WB: HeLa cell lysate. ICC/IF: MCF-7 cells. Flow Cyt: HeLa cells. IHC-P: Human ovarian carcinoma tissue.
  • General notes

    This product is a recombinant rabbit monoclonal antibody.

     

    Mouse, Rat: We have preliminary internal testing data to indicate this antibody may not react with these species. Please contact us for more information.

    Our RabMAb® technology is a patented hybridoma-based technology for making rabbit monoclonal antibodies. For details on our patents, please refer to RabMab® patents

Properties

Applications

Our Abpromise guarantee covers the use of ab52757 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 1/100000. Detects a band of approximately 85 kDa (predicted molecular weight: 57 kDa).
IP 1/100.
Flow Cyt 1/1000.

ab172730 - Rabbit monoclonal IgG, is suitable for use as an isotype control with this antibody.

IHC-P Use at an assay dependent concentration.
ICC/IF 1/100 - 1/250.

Target

  • Function
    DNA-binding protein that specifically binds heat shock promoter elements (HSE) and activates transcription. In higher eukaryotes, HSF is unable to bind to the HSE unless the cells are heat shocked.
  • Sequence similarities
    Belongs to the HSF family.
  • Domain
    the 9aaTAD motif is a transactivation domain present in a large number of yeast and animal transcription factors.
  • Post-translational
    modifications
    Phosphorylated on multiple serine residues, a subset of which are involved in stress-related regulation of transcription activation. Constitutive phosphorylation represses transcriptional activity at normal temperatures. Levels increase on specific residues heat-shock and enhance HSF1 transactivation activity. Phosphorylation on Ser-307 derepresses activation on heat-stress and in combination with Ser-303 phosphorylation appears to be involved in recovery after heat-stress. Phosphorylated on Ser-230 by CAMK2, in vitro. Cadmium also enhances phosphorylation at this site. Phosphorylation on Ser-303 is a prerequisite for HSF1 sumoylation. Phosphorylation on Ser-121 inhibits transactivation and promotes HSP90 binding. Phosphorylation on Thr-142 also mediates transcriptional activity induced by heat. Phosphorylation on Ser-326 plays an important role in heat activation of HSF1 transcriptional activity.
    Sumoylated with SUMO1 and SUMO2 on heat-shock. Heat-inducible sumoylation occurs after 15 min of heat-shock, after which levels decrease and at 4 hours, levels return to control levels. Sumoylation has no effect on HSE binding nor on transcriptional activity. Phosphorylation on Ser-303 is a prerequisite for sumoylation.
  • Cellular localization
    Cytoplasm. Nucleus. Cytoplasmic during normal growth. On activation, translocates to nuclear stress granules. Colocalizes with SUMO1 in nuclear stress granules.
  • Information by UniProt
  • Database links
  • Alternative names
    • Heat shock factor 1 antibody
    • Heat shock factor protein 1 antibody
    • Heat shock transcription factor 1 antibody
    • HSF 1 antibody
    • hsf1 antibody
    • HSF1_HUMAN antibody
    • HSTF 1 antibody
    • HSTF1 antibody
    see all

Images

  • Anti-HSF1 antibody [EP1710Y] (ab52757) at 1/100000 dilution + HeLa cell lysate at 10 µg

    Secondary
    HRP-conjugated goat anti-rabbit IgG at 1/2000 dilution

    Predicted band size : 57 kDa
    Observed band size : 85 kDa (why is the actual band size different from the predicted?)
  • Immunocytochemistry/Immunofluorescence analysis of MCF-7 cells labelling HSF1 with ab52757 at 1/1000. Cells were fixed with 4% paraformaldehyde and permeabilized with 0.1% Triton X-100. ab150077, an Alexa Fluor® 488-conjugated goat anti-rabbit IgG (1/1000) was used as the secondary antibody.
    Control: PBS only.
    Nuclear counter stain: DAPI.

  • Overlay histogram showing HeLa cells stained with ab52757 (red line). The cells were fixed with 80% methanol (5 min) and then permeabilized with 0.1% PBS-Tween for 20 min. The cells were then incubated in 1x PBS / 10% normal goat serum / 0.3M glycine to block non-specific protein-protein interactions followed by the antibody (ab52757, 1/1000 dilution) for 30 min at 22°C. The secondary antibody used was Alexa Fluor® 488 goat anti-rabbit IgG (H+L) (ab150077) at 1/2000 dilution for 30 min at 22°C. Isotype control antibody (black line) was rabbit IgG (monoclonal) (0.1μg/1x106 cells) used under the same conditions. Unlabelled sample (blue line) was also used as a control. Acquisition of >5,000 events were collected using a 20mW Argon ion laser (488nm) and 525/30 bandpass filter. This antibody gave a positive signal in HeLa cells fixed with 4% paraformaldehyde (10 min)/permeabilized with 0.1% PBS-Tween for 20 min used under the same conditions.

  • Immunohistochemical staining of paraffin-embedded human ovarian carcinoma using ab52757 at a 1:100 dilution.

References

This product has been referenced in:
  • Schulze S  et al. Identification of trichlormethiazide as a Mdr1a/b gene expression enhancer via a dual secretion-based promoter assay. Pharmacol Res Perspect 3:e00109 (2015). WB . Read more (PubMed: 25692026) »
  • Neueder A  et al. Novel Isoforms of Heat Shock Transcription Factor 1, HSF1?a and HSF1?ß, Regulate Chaperone Protein Gene Transcription. J Biol Chem 289:19894-906 (2014). Read more (PubMed: 24855652) »

See all 6 Publications for this product

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Please note: All products are "FOR RESEARCH USE ONLY AND ARE NOT INTENDED FOR DIAGNOSTIC OR THERAPEUTIC USE"

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