Protein Matrix Control of Reaction Center Excitation in Photosystem II.

ABSTRACT: Photosystem II (PSII) is a multisubunit pigment-protein complex that uses light-induced charge separation to power oxygenic photosynthesis. Its reaction center chromophores, where the charge transfer cascade is initiated, are arranged symmetrically along the D1 and D2 core polypeptides and comprise four chlorophyll (P_D1, P_D2, Chl_D1, Chl_D2) and two pheophytin molecules (Pheo_D1 and Pheo_D2). Evolution favored productive electron transfer only via the D1 branch, with the precise nature of primary excitation and the factors that control asymmetric charge transfer remaining under investigation. Here we present a detailed atomistic description for both. We combine large-scale simulations of membrane-embedded PSII with high-level qu

SUBMITTER: Sirohiwal A 

PROVIDER: S-EPMC7582616 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature