Pea PSII-LHCII supercomplexes form pairs by making connections across the stromal gap.

ABSTRACT: In higher plant thylakoids, the heterogeneous distribution of photosynthetic protein complexes is a determinant for the formation of grana, stacks of membrane discs that are densely populated with Photosystem II (PSII) and its light harvesting complex (LHCII). PSII associates with LHCII to form the PSII-LHCII supercomplex, a crucial component for solar energy conversion. Here, we report a biochemical, structural and functional characterization of pairs of PSII-LHCII supercomplexes, which were isolated under physiologically-relevant cation concentrations. Using single-particle cryo-electron microscopy, we determined the three-dimensional structure of paired C₂S₂M PSII-LHCII supercomplexes at 14 Å resolution. The two supercomplexes interact on their stromal sides throug

SUBMITTER: Albanese P 

PROVIDER: S-EPMC5577252 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature