Rational design of a photoswitchable DNA glue enabling high regulatory function and supramolecular chirality transfer

Nadja A. Simeth, Shotaro Kobayashi, Piermichele Kobauri, Stefano Crespi, Wiktor Szymanski, Kazuhiko Nakatani*, Chikara Dohno*, Ben L. Feringa*

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

16 Citaten (Scopus)
47 Downloads (Pure)


Short, complementary DNA single strands with mismatched base pairs cannot undergo spontaneous formation of duplex DNA (dsDNA). Mismatch binding ligands (MBLs) can compensate this effect, inducing the formation of the double helix and thereby acting as a molecular glue. Here, we present the rational design of photoswitchable MBLs that allow for reversible dsDNA assembly by light. Careful choice of the azobenzene core structure results in excellent band separation of the E and Z isomers of the involved chromophores. This effect allows for efficient use of light as an external control element for duplex DNA formation and for an in-depth study of the DNA–ligand interaction by UV-Vis, SPR, and CD spectroscopy, revealing a tight mutual interaction and complementarity between the photoswitchable ligand and the mismatched DNA. We also show that the configuration of the switch reversibly dictates the conformation of the DNA strands, while the dsDNA serves as a chiral clamp and translates its chiral information onto the ligand inducing a preference in helical chirality of the Z isomer of the MBLs.
Originele taal-2English
Pagina's (van-tot) 9207-9220
Aantal pagina's14
TijdschriftChemical Science
Nummer van het tijdschrift26
StatusPublished - jun.-2021

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