Expanding reaction horizons: evidence of the 5‐deazaflavin radical through photochemically induced dynamic nuclear polarization
Abstract: Deazaflavins are important analogues of the naturally occurring flavins: riboflavin, flavin mononucleotide (FMN), and flavin adenine dinucleotide (FAD). The use of 5-deazaflavin as a replacement coenzyme in a number of flavoproteins has proven particularly valuable in unraveling and manipulating their reaction mechanisms. It was frequently reported that one-electron-transfer reactions in flavoproteins are impeded with 5-deazaflavin as the cofactor. Based on these findings, it was concluded that the 5-deazaflavin radical is significantly less stable compared to the respective flavin semiquinone and quickly re-oxidizes or undergoes disproportionation. The long-standing paradigm of 5-deazaflavin being solely a two-electron/hydride acceptor/donor—“a nicotinamide in flavin clothing”—needs to be re-evaluated now with the indirect observation of a one-electron-reduced (paramagnetic) species using photochemically induced dynamic nuclear polarization (photo-CIDNP) 1H nuclear magnetic resonance (NMR) under biologically relevant conditions
- Location
-
Deutsche Nationalbibliothek Frankfurt am Main
- Extent
-
Online-Ressource
- Language
-
Englisch
- Notes
-
Angewandte Chemie. International Edition. - 62, 43 (2023) , e202309334, ISSN: 1521-3773
- Classification
-
Chemie
- Event
-
Veröffentlichung
- (where)
-
Freiburg
- (who)
-
Universität
- (when)
-
2023
- Creator
- DOI
-
10.1002/anie.202309334
- URN
-
urn:nbn:de:bsz:25-freidok-2396880
- Rights
-
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
-
25.03.2025, 1:53 PM CET
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- Wörner, Jakob
- Panter, Sabrina
- Illarionov, Boris
- Bacher, Adelbert
- Fischer, Markus
- Weber, Stefan
- Universität
Time of origin
- 2023