Description
Overview
The retinoblastoma protein (Rb) is a crucial tumor suppressor and master regulator of the cell cycle in both humans and mice. Rb plays a central role in various cellular processes, including cell cycle control, DNA replication, apoptosis, and differentiation. The activity of Rb is primarily regulated through phosphorylation at multiple sites, with Ser780 being a particularly important residue. Phosphorylation of Rb at Ser780 is associated with its inactivation, leading to cell cycle progression and cellular proliferation. Rb signaling is frequently dysregulated in various diseases, especially in cancer, where aberrant phosphorylation and inactivation of Rb contribute to uncontrolled cell proliferation, tumor progression, and therapy resistance. Elevated levels of phosphorylated Rb (Ser780) have been observed in numerous cancer types and are often associated with poor prognosis and aggressive disease. Additionally, the Rb pathway is implicated in other cellular processes such as senescence and differentiation, making it a critical target for study in various fields of biology.
The AlphaLISA
SureFire Ultra
Human and Mouse Phospho-Rb (Ser780) Detection Kit is a sandwich immunoassay designed for the quantitative detection of phosphorylated Rb (Ser780) in cellular lysates from both human and mouse samples 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
Alpha
SureFire
kits can be used for:
Cellular kinase assays
Receptor activation studies
Screening
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.
