Phospho-STAT1 Antibody

General Information

Product

Phospho-STAT1 Antibody

Verified Applications

ELISA, IHC, IP, WB

Host

Rabbit

Species Cross Reactivity

Human, Mouse

Predicted:  Rat

Immunogen

Synthetic peptide taken within amino acid region 700-750 on human STAT1 protein. Phosphorylated Serine 727 residue.

Physical Properties

Quantity

100 µg

Volume

200 µl

Concentration

0.5 µg/µl in antibody stabilization buffer

Immunoglobulin

IgG

Form

Affinity Purified

Clonality

Polyclonal

Storage

-20⁰C for long term storage

Application Protocol

ELISA

1:10,000

Immunoprecipitation

1:150

Western Blot

1:500

Protein

Uniprot #

P42224

Overview

Signal transducer and transcription activator that mediates cellular responses to interferons (IFNs), cytokine KITLG/SCF and other cytokines and other growth factors. Following type I IFN (IFN-alpha and IFN-beta) binding to cell surface receptors, signaling via protein kinases leads to activation of Jak kinases (TYK2 and JAK1) and to tyrosine phosphorylation of STAT1 and STAT2. The phosphorylated STATs dimerize and 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 IFN-stimulated genes (ISG), 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. Becomes activated in response to KITLG/SCF and KIT signaling. May mediate cellular responses to activated FGFR1, FGFR2, FGFR3 and FGFR4.

Molecular Function

Activator

Subcellular Location

Cytoplasm; Nucleus

Structure

Isoform alpha homodimerizes upon IFN-gamma induced phosphorylation. Heterodimer with STAT2 upon IFN-alpha/beta induced phosphorylation. The heterodimer STAT1:STAT2 forms the interferon-stimulated gene factor 3 complex (ISGF3) with IRF9. Interacts (phosphorylated at Ser 727) with PIAS1 (dimethylated on arginine); the interaction results in release of STAT1 from its target gene. Interacts with IFNAR1; the interaction requires the phosphorylation of IFNAR1 at 'Tyr-466'. Interacts with IFNAR2, NMI, PTK2/FAK1 and SRC. Interacts with ERBB4 (phosphorylated). Interacts with Sendai virus C', C, Y1 and Y2 proteins, Nipah virus P, V and W proteins, and rabies virus phosphoprotein preventing activation of ISRE and GAS promoter. Interacts with HCV core protein; the interaction results in STAT1 degradation.

Alternative Nomenclature

Signal transducer and activator of transcription 1 91kD 
CANDF7 
IMD31A 
IMD31B 
IMD31C 
ISGF 3 
Signal transducer and activator of transcription 1-alpha/beta 
STAT91 
Transcription factor ISGF-3 components p91/p84