Sunitinib-Red HTRF®

Associated products

Sunitinib-Red is a derivative of Sunitinib, and has been validated as a fluorescent tracer for HTRF Kinase Binding assays.

No-wash
Non-radioactive

Download the protocols

Sunitinib-Red is a derivative of Sunitinib, and has been validated as a fluorescent tracer for HTRF Kinase Binding assays.

Size

Cat. number selected :

Quantity

In stock

Overview

This compound is derived from Sunitinib, which is a well known inhibitor of the PDGF and VEGF RTK families. Sunitinib, which is an ATP-competitive Kinase inhibitor, is used as a drug to treat renal cell carcinoma and imatinib-resistant gastrointestinal stromal tumors. It has been shown to bind with an affinity of <100 nM to about 18% of the Kinases (both RTK and Ser/Thr). It is therefore useful to address multiple Kinases in the HTRF Kinase Binding assay platform.. The ‘d2’ fluorescent dye used absorbs with its maximum near 650 nm and fluoresces near 670 nm. It is used as an acceptor molecule in HTRF assays.

Sunitinib-Red is supplied as a 25 µM solution in DMSO.

Benefits

EQUILIBRIUM BINDING
PHARMACOLOGICAL STUDIES
INHIBITOR MODE OF ACTION

Kd determination assay principal

The binding of Sunitinib-Red is detected in a sandwich assay format using the Anti Tag labeled with Europium Cryptate (donor), which binds to the tagged Kinase, and a red fluorescent tracer labelled with d2 (acceptor).

The detection principle is based on HTRF® technology. The HTRF ratio (665/620) will increase upon the addition of more of the tracer, and will saturate depending on the dissociation constant (Kd) of the tracer to the tagged kinase.

To know whether Sunitinib-Red is the tracer best suited to your tagged kinase of interest, we advise you to try the Kinase Binding Discovery kits.

Principal of kinase binding saturation assay using sunitinib-red

Kd determination assay protocol

Saturation binding experiments of Sunitinib-Red can be run in 96- or 384-well plates (20 µL final volume).

First, a dilution series ranging between 0 and 1 µM of Sunitinib-Red in the Kinase Binding Buffer is prepared in a 96-well non-binding plate. Next, 5 µL of Kinase Binding Buffer are dispensed into the final 96- or 384-well plate. Then 5 µL of tagged-Kinase are added, followed by 5 µL of Anti-tag Eu-cryptate. Finally, 5 µL of the red tracer solution are added.

The HTRF ratio is measured after 1H of incubation.

IC50/Ki determination assay principle

The binding of Sunitinib-Red is detected in a sandwich assay format using a specific Anti-GST, 6HIS antibody or Streptavidin labeled with Europium Cryptate (donor), which binds to the tagged Kinase, and a red fluorescent Sunitinib labelled with d2 (acceptor).

The detection principle is based on HTRF® technology. The HTRF ratio (665/620) will increase upon the addition of more Sunitinib-Red, and will saturate depending on the dissociation constant (Kd ) of Sunitinib-Red to the tagged kinase.

When an inhibitor of the kinase is added, Sunitinib-Red will be displaced and the HTRF signal will disappear, depending on the dose.

Principal of kinase binding inhibitor assay using sunitinib-red

IC50/Ki determination assay protocol

Pharmacological evaluation of inhibitors of interest can be run in 96- or 384-well plates.

First, a dilution series of inhibitor ranging between 40 µM and 0.23 nM is prepared, and 5 µL of each concentration are dispensed into the plate. Next, 5 µL of tagged-Kinase are added, followed by 5 µL of anti-tag Eu-cryptate. Finally, 5 µL of Sunitinib-Red solution are added, prepared at 4x the final concentration. The HTRF ratio is measured after 1 H of incubation.

Analyses of the data give typical dose response curves ranging between 10 µM and 56 pM, enabling an evaluation of the IC50/Ki values for the inhibitor of interest.

Protocol for kinase binding inhibitor assay using sunitinib-red

Saturation Binding (Kd)

Before perfoming competitive binding studies of inhibitors, the dissociation constant (Kd) of Sunitinib-Red has to be determined on the tagged Kinase of interest. This can be done with the help of the Kinase-GST/6HIS/biotin Discovery kits. A typical saturation binding experiment is performed using tracer concentrations between 0 and 250 nM, and measuring total- and non-specific binding signals. Subtracting the non-specific from the total binding signal gives the specific signal, which can be analysed to give the Kd. Here an example is shown for the determination of the Kd (56 nM) of Sunitinib-Red on 5 nM PDGFRb-GST.

Kd curves of Sunitinib-Red on PDGFRb-GST

Competitive Binding (IC50/Ki)

Dose response curves of various known kinase inhibitors (Staurosporine, Dasatinib, Imatinib, Tozasertib, Sunitinib, and Gefitinib) were measured using Sunitinib-Red at its Kd (56 nM) on 5 nM PDGFRb-GST. Staurosporine, Dasatinib, Sunitinib, and Imatinib show show high potencies in good correlation with literature values.

Inhibitor effect of various inhibitors on Sunitinib-red /PDGFRb-GST binding

3 app notes on kinase inhibitor selection for kinase binding assays

Determine the best tracer to your kinase binding assay - Application Notes

The ultimate guide to successful kinase binding experiments

Tips for getting the best performance from your Kinase binding assay - Guides

HTRF Product Catalog

All your HTRF assays in one document! - Catalog

A guide to Homogeneous Time Resolved Fluorescence

General principles of HTRF - Guides

Product Insert Sunitinib-red / 62KB03REDC-62KB03REDE

62KB03REDC-62KB03REDE - Product Insert

The essential white paper to expand your knowledge on kinases

Learn about cutting edge kinase research in this free white paper - Guides

How HTRF compares to Western Blot and ELISA

Get the brochure about technology comparison. - Brochures

How to run a Kinase Binding Platform assay

What to expect at the bench - Videos

Revolutionize your kinases investigations with HTRF

Watch this video to learn more about kinases investigations - Videos

Easy method for kinetic binding determination

How to revolutionize your kinetic binding demonstration with HTRF kinase binding platform assays - Application Notes

Safety Data Sheet (DEU) Sunitinib-red / 62KB03REDC

62KB03REDC - Safety Data Sheet

Safety Data Sheet (ELL) Sunitinib-red / 62KB03REDC

62KB03REDC - Safety Data Sheet

Safety Data Sheet (FRA-FR) Sunitinib-red / 62KB03REDC

62KB03REDC - Safety Data Sheet

Safety Data Sheet (ITA) Sunitinib-red / 62KB03REDC

62KB03REDC - Safety Data Sheet

Safety Data Sheet (SPA) Sunitinib-red / 62KB03REDC

62KB03REDC - Safety Data Sheet

Safety Data Sheet (ENG-GB) Sunitinib-red / 62KB03REDC

62KB03REDC - Safety Data Sheet

Safety Data Sheet (ENG-US) Sunitinib-red / 62KB03REDC

62KB03REDC - Safety Data Sheet

Batch Information Sunitinib-red / 20230219

62KB03REDC Batch 02A - Batch Information

Batch Information Sunitinib-red / 20230928

62KB03REDC Batch 04A - Batch Information

Safety Data Sheet (DEU) Sunitinib-red / 62KB03REDE