Description
Overview
Sequestome-1 or ubiquitin binding protein p62 (SQSTM1 p62) is an autophagosome cargo protein that targets other proteins that bind to it for selective autophagy. SQSTM1 p62 is an adaptor protein which is initially phosphorylated by ULK1 on Serine 407, then on Serine 403 by casein kinase 2 or TBK1. The phosphorylation on Ser403 increases its affinity for ubiquitin chains, thus enabling SQSTM1 p62 to bind to ubiquitinated cargo proteins. Ubiquitinated proteins or ubiquitin coated mitochondria associated with SQSTM1 p62 proteins are taken away in phagosomes, whose content is cleared out after lysosomal fusion. SQSTM1 p62 is implicated in Alzheimer’s disease, Huntington’s disease, NASH, and numerous types of cancer.
The AlphaLISA
SureFire Ultra
Human and Mouse Total SQSTM1 p62 Detection Kit is a sandwich immunoassay for the quantitative detection of total SQSTM1 p62 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
Alpha SureFire kits can be used for:
Cellular kinase assays
Receptor activation studies
Screening
How it works
Total-AlphaLISA
SureFire Ultra
assay principle
The Total-AlphaLISA
SureFire Ultra
assay measures the expression level of a protein target in a cell lysate.
The Total-AlphaLISA
SureFire Ultra
assay uses two antibodies which recognize two different distal epitopes 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 targeted 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 protein present in the sample.
Total-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 Total-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.
Total-AlphaLISA
SureFire Ultra
one-plate assay protocol
Detection of Total 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.
