Impact of Peripheral Hydrogen Bond on Electronic Properties of the Primary Acceptor Chlorophyll in the Reaction Center of Photosystem I.

ABSTRACT: Photosystem I (PS I) is a photosynthetic pigment-protein complex that absorbs light and uses the absorbed energy to initiate electron transfer. Electron transfer has been shown to occur concurrently along two (A- and B-) branches of reaction center (RC) cofactors. The electron transfer chain originates from a special pair of chlorophyll a molecules (P700), followed by two chlorophylls and one phylloquinone in each branch (denoted as A_-1, A₀, A₁, respectively), converging in a single iron-sulfur complex F_x. While there is a consensus that the ultimate electron donor-acceptor pair is P700⁺A₀^-, the involvement of A_-1 in electron transfer, as well as the mechanism of the very first step in the charge

SUBMITTER: Luo L 

PROVIDER: S-EPMC11084960 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature