Description
Overview
Stimulator of Interferon Genes (STING) is an adaptor protein that mediates innate immune responses to cytosolic DNA. Upon binding of cyclic dinucleotides (CDNs) produced by cGAS in response to DNA sensing, STING undergoes conformational changes and translocates from the ER to the Golgi, initiating TBK1- and IRF3-dependent induction of type I interferons and inflammatory cytokines. STING plays critical roles in antiviral defense, cancer immunosurveillance, and autoimmune pathogenesis. STING agonists are under investigation for cancer immunotherapy, aiming to boost antitumor immunity, while inhibitors are being explored for autoinflammatory and autoimmune diseases driven by excessive type I IFN signaling.
The AlphaLISA
SureFire Ultra
Mouse Phospho-STING (Ser365)
is a sandwich immunoassay for the quantitative detection of phospho-STING (Ser365) in cellular lysates, using Alpha Technology.
Formats:
The HV (high volume) kit contains reagents to run 100 wells in 96-well format, using a 60 μL reaction volume.
The 500-point kit contains enough reagents to run 500 wells in 384-well format, using a 20 μL reaction volume.
The 10,000-point kit contains enough reagents to run 10,000 wells in 384-well format, using a 20 μL reaction volume.
The 50,000-point kit contains enough reagents to run 50,000 wells in 384-well format, using a 20 μL reaction volume.
AlphaLISA
SureFire Ultra
kits are compatible with:
Cell and tissue lysates
Antibody modulators
Biotherapeutic antibodies
AlphaLISA
SureFire Ultra
kits can be used for:
Cellular kinase assays
Receptor activation studies
High-throughput screening for preclinical studies
How it works
Phospho-AlphaLISA
SureFire Ultra
assay principle
The Phospho-AlphaLISA
SureFire Ultra
assay measures a protein target when phosphorylated at a specific residue.
The assay uses two antibodies which recognize the phospho epitope and a distal epitope on the targeted protein. AlphaLISA assays require two bead types: Acceptor and Donor beads. Acceptor beads are coated with a proprietary CaptSure™ agent to specifically immobilize the assay specific antibody, labeled with a CaptSure tag. Donor beads are coated with streptavidin to capture one of the detection antibodies, which is biotinylated. In the presence of phosphorylated protein, the two antibodies bring the Donor and Acceptor beads in close proximity whereby the singlet oxygen transfers energy to excite the Acceptor bead, allowing the generation of a luminescent Alpha signal. The amount of light emission is directly proportional to the quantity of phosphoprotein present in the sample.
Phospho-AlphaLISA
SureFire Ultra
two-plate assay protocol
The two-plate protocol involves culturing and treating the cells in a 96-well plate before lysis, then transferring lysates into a 384-well OptiPlate™ plate before the addition of Phospho-AlphaLISA
SureFire Ultra
detection reagents. This protocol permits the cells viability and confluence to be monitored. In addition, lysates from a single well can be used to measure multiple targets.
Phospho-AlphaLISA
SureFire Ultra
one-plate assay protocol
Detection of Phosphorylated target protein with AlphaLISA
SureFire Ultra
reagents can be performed in a single plate used for culturing, treatment, and lysis. No washing steps are required. This HTS designed protocol allows for miniaturization while maintaining AlphaLISA
SureFire Ultra
quality.
