Thermo Scientific™ LanthaScreen™ STAT3 GripTite™ Cell Line

The JAK/STAT3 signaling pathway is known to be activated by cytokines such as IL-6. In this pathway, binding of IL-6 to its cell-surface receptors results in the activation of JAKs, which in turn phosphoactivate STAT3 proteins at a specific tyrosine residue (Y705).

Brand:  Thermo Scientific™ K1488

Product Code. 10104643

Description

The JAK/STAT3 signaling pathway is known to be activated by cytokines such as IL-6. In this pathway, binding of IL-6 to its cell-surface receptors results in the activation of JAKs, which in turn phosphoactivate STAT3 proteins at a specific tyrosine residue (Y705). LanthaScreen™ STAT3 GripTite™ is a human cell line that constitutively expresses a GFP-STAT3 fusion protein. The JAK/STAT signaling pathway is known to be functionally intact in this cell line; therefore, the GFP-STAT3 fusion protein serves as a substrate for IL-6-inducible phosphorylation. Using this cell line, a lytic immunoassay has been developed in which the phosphorylation state of GFP-STAT3 is detected in cell lysates using a terbium-labeled anti-pY705-STAT3 antibody in a time-resolved FRET (TR-FRET) readout.

The GFP-STAT3 DNA expression construct was transfected into the GripTite™ HEK 293 cell line using Lipofectamine™ 2000 transfection reagent, and the transfected cells were selected with blasticidin. This cell line is a clonal population isolated by flow cytometry using GFP fluorescence as a sorting marker. The assay utilizing this cell line is validated for EC50 and Z'-factors under optimized conditions using IL-6 as a ligand for JAK-mediated GFP-STAT3 phosphorylation. This assay has also been tested under variable experimental conditions, including cell plating density, stimulation time, DMSO tolerance, and assay equilibration time. An alternate 'mix-and-read' assay format is also described.

Specifications

• Alternate Agonists: IL-6
• Assay Entry: Cell-based terbium phospho-specific activity (stable)
• Content And Storage: LanthaScreen™ STAT3 GripTite™ cells are shipped on dry ice. Store in liquid nitrogen immediately upon receipt, or thaw for immediate use.
• Gene Symbol: STAT3
• Product Line: GripTite™, LanthaScreen™
• Readout: End Point
• Target Entry: STAT3
• System Type: LanthaScreen™

• Antagonists: IFN-alpha
• Cell State: Dividing Cells
• For Use With (Application): Cytokines, Kinases
• Primary Agonist: IL-6
• Quantity: 1 Vial
• Reporter Gene: GFP (EmGFP)
• Type: Dividing Cells
• Druggable Target: Kinases

For Research Use Only. Not for use in diagnostic procedures.