High-Light versus Low-Light: Effects on Paired Photosystem II Supercomplex Structural Rearrangement in Pea Plants.

ABSTRACT: In plant grana thylakoid membranes Photosystem II (PSII) associates with a variable number of antenna proteins (LHCII) to form different types of supercomplexes (PSII-LHCII), whose organization is dynamically adjusted in response to light cues, with the C₂S₂ more abundant in high-light and the C₂S₂M₂ in low-light. Paired PSII-LHCII supercomplexes interacting at their stromal surface from adjacent thylakoid membranes were previously suggested to mediate grana stacking. Here, we present the cryo-electron microscopy maps of paired C₂S₂ and C₂S₂M₂ supercomplexes isolated from pea plants grown in high-light and low-light, respectively. These maps show a different rotationa

SUBMITTER: Grinzato A 

PROVIDER: S-EPMC7698171 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature