Report

Structure and assembly mechanism of plant C2S2M2-type PSII-LHCII supercomplex

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Science  25 Aug 2017:
Vol. 357, Issue 6353, pp. 815-820
DOI: 10.1126/science.aan0327

Adapting to the right light

In plants, photosystem II is the first protein complex in the machinery that converts sunlight into chemical energy. It comprises antennae complexes (LHCIIs), which collect the light energy, and a dimeric core that contains the reaction center where water is split into oxygen and protons. Su et al. report cryo-electron microscopy structures of a supercomplex consisting of the dimeric core, two strongly bound LHCIIs, and two moderately bound LHCIIs (see the Perspective by Croce and van Amerongen). Under high-light conditions, the moderately bound LHCIIs might detach to down-regulate the efficiency of light harvesting and prevent damage.

Science, this issue p. 815; see also p. 752

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