Revvity, 64XIAPFLRED, HTRF Human XIAP / BIR3 Binding Red Ligand

Overview
The HTRF XIAP BIR3 Red Ligand is based on labeled A410099.1 derivative and is primarily intended to perform cooperativity binding studies. It enables calculation of the affinity of the XIAP BIR3 Red Ligand for XIAP BIR3 protein in the presence of the targeted protein of interest. The Kd of HTRF XIAP BIR3 Red Ligand for XIAP protein, in absence and presence of the targeted protein, enables an accurate analysis of the cooperative effect assessed with the HTRF XIAP BIR3 binding kit.
HTRF assays offer many advantages over other technologies:

Homogeneous add-and-read format
No wash steps
Low background
Straightforward miniaturization from 96- or 384-well microplates to high density assay formats such as 384-well low volume and 1536-well plates
Stable signal, providing flexibility in time of readout or size of assays
How it works
HTRF XIAP ligand binding assay principle on the XIAP BIR3 binding domain
HTRF XIAP BIR3 Red Ligand binding is detected in a direct binding assay format, using an anti GST-Terbium Cryptate antibody which binds to GST-tagged Human XIAP BIR3 domain. When the dyes are in close proximity, the excitation of the donor with a light source (laser or flash lamp) triggers a Fluorescence Resonance Energy Transfer (FRET) towards the acceptor, which in turn fluoresces at a specific wavelength (665 nm) (Image A). The specific binding signal is calculated by subtracting the non-specific binding signal from the total signal, enabling Kd determination for the HTRF XIAP BIR3 Red Ligand (Image B).

HTRF XIAP BIR3 Red Ligand binding assay protocol
Saturation binding experiments of HTRF XIAP BIR3-Red Ligand can be run in 384-well plates by dispensing 5 µL of Diluent 9 buffer (for Total binding) or XIAP BIR3 Binding standard (for non specific binding). Then 5 µL of PROTAC Binding Buffer 2 (for reference) or the targeted protein diluted in PROTAC Binding Buffer 2 (for cooperativity studies) are added, followed by 5 µL of GST-tagged XIAP BIR3 protein. Finally, 5 µL of a pre-mixed solution of HTRF XIAP BIR3-Red Ligand and Anti-GST Tb cryptate antibody are added.
The HTRF Ratio is measured after 2 hours of incubation at room temperature Automation Compatible-Yes
Brand-HTRF
Detection Modality-HTRF
Product Group-Fluorescent Reagent
Shipping Conditions-Shipped in Dry Ice
Technology-TR-FRET
Therapeutic Area-Inflammation Neuroscience Oncology & Inflammation
Unit Size-1 unit