Electronic Structures of Radical-Pair-Forming Cofactors in a Heliobacterial Reaction Center.

ABSTRACT: Photosynthetic reaction centers (RCs) are membrane proteins converting photonic excitations into electric gradients. The heliobacterial RCs (HbRCs) are assumed to be the precursors of all known RCs, making them a compelling subject for investigating structural and functional relationships. A comprehensive picture of the electronic structure of the HbRCs is still missing. In this work, the combination of selective isotope labelling of ¹³C and ¹⁵N nuclei and the utilization of photo-CIDNP MAS NMR (photochemically induced dynamic nuclear polarization magic-angle spinning nuclear magnetic resonance) allows for highly enhanced signals from the radical-pair-forming cofactors. The remarkable magnetic-field dependence of the solid-state photo-CIDNP effect allows for observati

SUBMITTER: Kim Y 

PROVIDER: S-EPMC10934547 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature