Product nameAnti-STAT1 (phospho S727) antibody [PSM1]
See all STAT1 primary antibodies
DescriptionMouse monoclonal [PSM1] to STAT1 (phospho S727)
SpecificityThe antibody recognizes STAT 1 (91 kDa) activated by phosphorylation at Ser727.
Tested applicationsSuitable for: WB, IPmore details
Species reactivityReacts with: Human
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: 0.097% Sodium azide
Concentration information loading...
Purity>95% by SDS-PAGE
Purification notesPurified from hybridoma culture supernatant by protein A affinity chromatography.
Our Abpromise guarantee covers the use of ab3991 in the following tested applications.
The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
|WB||Use at an assay dependent dilution. Detects a band of approximately 91 kDa (predicted molecular weight: 87 kDa).|
|IP||Use at an assay dependent dilution.|
FunctionSignal transducer and activator of transcription that mediates signaling by interferons (IFNs). Following type I IFN (IFN-alpha and IFN-beta) binding to cell surface receptors, Jak kinases (TYK2 and JAK1) are activated, leading to tyrosine phosphorylation of STAT1 and STAT2. The phosphorylated STATs dimerize, associate with ISGF3G/IRF-9 to form a complex termed ISGF3 transcription factor, that enters the nucleus. ISGF3 binds to the IFN stimulated response element (ISRE) to activate the transcription of interferon stimulated genes, which drive the cell in an antiviral state. In response to type II IFN (IFN-gamma), STAT1 is tyrosine- and serine-phosphorylated. It then forms a homodimer termed IFN-gamma-activated factor (GAF), migrates into the nucleus and binds to the IFN gamma activated sequence (GAS) to drive the expression of the target genes, inducing a cellular antiviral state.
Involvement in diseaseNote=STAT1 deficiency results in impaired immune response leading to severe mycobacterial and viral diseases. In the case of complete deficiency, patients can die of viral disease.
Defects in STAT1 are a cause of mendelian susceptibility to mycobacterial disease (MSMD) [MIM:209950]; also known as familial disseminated atypical mycobacterial infection. This rare condition confers predisposition to illness caused by moderately virulent mycobacterial species, such as Bacillus Calmette-Guerin (BCG) vaccine and environmental non-tuberculous mycobacteria, and by the more virulent Mycobacterium tuberculosis. Other microorganisms rarely cause severe clinical disease in individuals with susceptibility to mycobacterial infections, with the exception of Salmonella which infects less than 50% of these individuals. The pathogenic mechanism underlying MSMD is the impairment of interferon-gamma mediated immunity whose severity determines the clinical outcome. Some patients die of overwhelming mycobacterial disease with lepromatous-like lesions in early childhood, whereas others develop, later in life, disseminated but curable infections with tuberculoid granulomas. MSMD is a genetically heterogeneous disease with autosomal recessive, autosomal dominant or X-linked inheritance.
Sequence similaritiesBelongs to the transcription factor STAT family.
Contains 1 SH2 domain.
modificationsPhosphorylated on tyrosine and serine residues in response to IFN-alpha, IFN-gamma, PDGF and EGF. Phosphorylation on Tyr-701 (lacking in beta form) by JAK promotes dimerization and subsequent translocation to the nucleus. Phosphorylation on Ser-727 by several kinases including MAPK14, ERK1/2 and CAMKII on IFN-gamma stimulation, regulates STAT1 transcriptional activity. Phosphorylation on Ser-727 promotes sumoylation though increasing interaction with PIAS. Phosphorylation on Ser-727 by PKCdelta induces apoptosis in response to DNA-damaging agents.
Sumoylated by SUMO1, SUMO2 and SUMO3. Sumoylation is enhanced by IFN-gamma-induced phosphorylation on Ser-727, and by interaction with PIAS proteins. Enhances the transactivation activity.
Cellular localizationCytoplasm. Nucleus. Translocated into the nucleus in response to IFN-gamma-induced tyrosine phosphorylation and dimerization.
- Information by UniProt
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All lanes : Anti-STAT1 (phospho S727) antibody [PSM1] (ab3991) at 1/1000 dilution
Lane 1 : Human whole lung cell lysate (Untreated)
Lane 2 : Human whole lung cell lysate (IFN-alpha 6h)
Lane 3 : Human whole lung cell lysate (IFN-alpha 24h)
Lane 4 : Human whole lung cell lysate (IFN-alpha 48h)
Lysates/proteins at 10 µg per lane.
All lanes : Goat anti-mouse IgG polyclonal at 1/5000 dilution
Developed using the ECL technique.
Performed under reducing conditions.
Predicted band size: 87 kDa
Observed band size: 91 kDa why is the actual band size different from the predicted?
Exposure time: 5 minutes
ab3991 has not yet been referenced specifically in any publications.