Phospho-STAT4 Antibody BIOTIN

General Information

Product

Phospho-STAT1 Positive Control

Verified Applications

WB

Immunogen

Purified Protein

Physical Properties

Quantity

5 Applications

Volume

Inquire

Form

Western Blot Positive Control

Storage

-20⁰C for long term storage

Application Protocol

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