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Publication Abstract from PubMed

Plants regulate photosynthetic light harvesting to maintain balanced energy flux into photosystems I and II (PSI and PSII). Under light conditions favoring PSII excitation, the PSII antenna, light-harvesting complex II (LHCII), is phosphorylated and forms a supercomplex with PSI core and the PSI antenna, light-harvesting complex I (LHCI). Both LHCI and LHCII then transfer excitation energy to the PSI core. We report the structure of maize PSI-LHCI-LHCII solved by cryo-electron microscopy, revealing the recognition site between LHCII and PSI. The PSI subunits PsaN and PsaO are observed at the PSI-LHCI interface and the PSI-LHCII interface, respectively. Each subunit relays excitation to PSI core through a pair of chlorophyll molecules, thus revealing previously unseen paths for energy transfer between the antennas and the PSI core.

Structure of the maize photosystem I supercomplex with light-harvesting complexes I and II.,Pan X, Ma J, Su X, Cao P, Chang W, Liu Z, Zhang X, Li M Science. 2018 Jun 8;360(6393):1109-1113. doi: 10.1126/science.aat1156. PMID:29880686^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.