TSA in Drug Discovery: Services & Advantages by Creative Biostructure, Slides of Biology

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thermal shift assay fragment

screening

In drug discovery, biophysical approaches have become attractive screening techniques. They are

not only the main primary hit finding methodologies, such as weakly active fragments, but also as

orthogonal approaches for the validation of hit compounds found by conventional biochemical or

cellular assays. Among them, thermal shift assay (TSA) is a reliable and simple technique to

identify active fragments and analyze the binding events of ligands to the target by monitoring

changes in protein thermal stability.

Creative Biostructure can provide appropriate TSA solutions according to the specific

requirements of drug discovery projects, including but not limited to reporter dyes detection

methods (thermofluor, thiol-specific reaction dyes CPM, rigidity sensitive dyes DCVJ),

measurement of the intrinsic tryptophan fluorescence lifetime, (high-throughput) cellular thermal

shift assay (CETSA), fast parallel proteolysis (FastPP), radioligand binding thermostability assay

(RBTA), as well as fluorescence-detection size-exclusion chromatography-based thermostability

assay (FSEC-TS).

In addition to Thermofluor, other TSA approaches that analyze protein-ligand binding events by monitoring

changes in protein thermal stability, such as approaches based on non-fluorescent dyes CPM, the intrinsic

tryptophan fluorescence lifetime/wavelength, static light scattering, FastPP, CETSA, FSEC-TS, RBTA, etc ., all

of which have strengths and limitations.

Advantages of our MagHelix™ Thermal Shift Assay (TSA) services:

We are capable of providing all types of TSA approaches mentioned above.

Our scientists have extensive expertise in various types of TSA approaches for monitoring protein thermal

stability.

Our scientists propose TSA strategies to meet the needs of each customer based on the available

information and specific goals of a project.

Some simple and fast TSA techniques are suitable for high-throughput fragment-based screening processes.

High-throughput CETSA technology allows us to screen and characterize compounds in a more native

cellular environment.

We support the design, development, and consultation of TSA assays.

In addition to TSA approaches, Creative Biostructure can also provide other biophysical techniques for the

identification, validation, affinity, selectivity, and binding mechanisms of hits involved in early drug discovery.

We support combinatorial approaches, such as combining TSA assays with surface plasmon resonance (SPR)

for independent verification of biophysical parameters. Please feel free to contact us if you would like to

learn more.

References

1.Vollrath F.; et al. Differential scanning fluorimetry provides high throughput data on silk protein

transitions. Scientific Reports. 2014, 4: 5625.

2.Scott A D. Fluorescent thermal shift assays for identifying small molecule ligands. Biophysical Techniques in

Drug Discovery. 2017, 61: 208.

3.Kirsch P.; et al. Concepts and core principles of fragment-based drug design. Molecules. 2019, 24(23):

4.Henderson M J.; et al. High-throughput cellular thermal shift assays in research and drug discovery. SLAS

DISCOVERY: Advancing the Science of Drug Discovery. 2020, 25(2): 137-147.

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