Product nameAnti-HSF1 antibody
See all HSF1 primary antibodies
DescriptionRabbit polyclonal to HSF1
Tested applicationsSuitable for: WB, ICC/IFmore details
Species reactivityReacts with: Human
Predicted to work with: Horse, Dog, Macaque monkey
Synthetic peptide corresponding to Human HSF1 aa 450 to the C-terminus conjugated to keyhole limpet haemocyanin.
(Peptide available as
- Recombinant Human HSF1 protein (ab78795) can be used as a positive control in WB. This antibody gave a positive signal in the following human whole cell lysates: HeLa; MCF7; MDA MB 231; Jurkat; HepG2; Caco2; HEK293.
Storage instructionsShipped at 4°C. Store at +4°C short term (1-2 weeks). Upon delivery aliquot. Store at -20°C or -80°C. Avoid freeze / thaw cycle.
Storage bufferpH: 7.40
Preservative: 0.02% Sodium azide
Note: Batches of this product that have a concentration < 1mg/ml may have BSA added as a stabilising agent. If you would like information about the formulation of a specific lot, please contact our scientific support team who will be happy to help.
Concentration information loading...
PurityImmunogen affinity purified
Our Abpromise guarantee covers the use of ab105086 in the following tested applications.
The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
|WB||Use a concentration of 1 µg/ml. Detects a band of approximately 90 kDa (predicted molecular weight: 85 kDa).|
|ICC/IF||Use a concentration of 1 µg/ml.|
FunctionDNA-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 similaritiesBelongs to the HSF family.
Domainthe 9aaTAD motif is a transactivation domain present in a large number of yeast and animal transcription factors.
modificationsPhosphorylated 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 localizationCytoplasm. Nucleus. Cytoplasmic during normal growth. On activation, translocates to nuclear stress granules. Colocalizes with SUMO1 in nuclear stress granules.
- Information by UniProt
- Heat shock factor 1 antibody
- Heat shock factor protein 1 antibody
- Heat shock transcription factor 1 antibody
All lanes : Anti-HSF1 antibody (ab105086) at 1 µg/ml
Lane 1 : HeLa (Human epithelial carcinoma cell line) Whole Cell Lysate
Lane 2 : MCF7 (Human breast adenocarcinoma cell line) Whole Cell Lysate
Lane 3 : MDA-MB-231 (Human breast adenocarcinoma cell line) Whole Cell Lysate
Lane 4 : Jurkat (Human T cell lymphoblast-like cell line) Whole Cell Lysate
Lane 5 : HepG2 (Human hepatocellular liver carcinoma cell line) Whole Cell Lysate
Lane 6 : Caco 2 (Human colonic carcinoma cell line) Whole Cell Lysate
Lane 7 : HEK293 (Human embryonic kidney cell line) Whole Cell Lysate
Lysates/proteins at 10 µg per lane.
All lanes : Goat Anti-Rabbit IgG H&L (HRP) preadsorbed (ab97080) at 1/5000 dilution
Developed using the ECL technique.
Performed under reducing conditions.
Predicted band size: 85 kDa
Observed band size: 90 kDa why is the actual band size different from the predicted?
Additional bands at: 50 kDa, 74 kDa. We are unsure as to the identity of these extra bands.
Exposure time: 20 minutes
The predicted molecular weight of HSF1 is 57 kDa (SwissProt), however we expect to observe a banding pattern around 85 kDa. Abcam welcomes customer feedback and would appreciate any comments regarding this product and the data presented above. Abcam recommends using milk as the blocking agent.
ICC/IF image of ab105086 stained MCF7 cells. The cells were 100% methanol fixed (5 min) and then incubated in 1%BSA / 10% normal goat serum / 0.3M glycine in 0.1% PBS-Tween for 1h to permeabilise the cells and block non-specific protein-protein interactions. The cells were then incubated with the antibody (ab105086, 1µg/ml) overnight at +4°C. The secondary antibody (green) was ab96899, DyLight® 488 goat anti-rabbit IgG (H+L) used at a 1/250 dilution for 1h. Alexa Fluor® 594 WGA was used to label plasma membranes (red) at a 1/200 dilution for 1h. DAPI was used to stain the cell nuclei (blue) at a concentration of 1.43µM. This antibody also gave a positive result in 100% methanol fixed (5 min) HeLa, Hek293 and HepG2 cells at 1µg/ml.
ab105086 has not yet been referenced specifically in any publications.