4.3 Selections of DNA-Encoded Libraries to Protein Targets on Living Cells
Buch
Herausgeber: Scheuermann, J. ; Li, Y.
Titel: DNA-Encoded Libraries
Print ISBN: 9783132455221; Online ISBN: 9783132437357; Buch-DOI: 10.1055/b000000342
1st edition © 2024. Thieme. All rights reserved.
Georg Thieme Verlag KG, Stuttgart
Fachgebiete: Organische Chemie;Chemische Reaktionen, Katalyse;Organometallchemie;Chemische Labormethoden, Stöchiometrie
Science of Synthesis Reference Libraries
Übergeordnete Publikation
Titel: Science of Synthesis
DOI: 10.1055/b-00000101
Reihenherausgeber: Fürstner, A. (Editor-in-Chief); Carreira, E. M.; Faul, M.; Kobayashi, S.; Koch, G.; Molander, G. A.; Nevado, C.; Trost, B. M.; You, S.-L.
Typ: Mehrbändiges Werk
Abstract


Membrane proteins play a crucial role in numerous physiological processes and are the most common targets of approved drugs. However, the difficulty in purifying membrane proteins has limited the application of DNA-encoded libraries (DELs) for these targets in drug discovery campaigns. In this chapter, two methodologies for the selection of DELs against cell-surface proteins directly on live cells are presented. The first method employs covalent crosslinking to capture transient interactions between DNA-linked ligands and membrane proteins, facilitating the removal of non-crosslinked molecules through stringent washing. The second approach utilizes an engineered biotin ligase enzyme tag on the target to selectively biotinylate DNA-linked ligands through induced proximity. These methods successfully address challenges such as low target-protein concentration on live cells and the low efficiency in purifying DNA–membrane-protein conjugates, offering promising tools for small-molecule discovery targeting membrane proteins.