Funding Organization(s): The Strategic Priority Research Program of CAS, The Key Research Program of Frontier Sciences of CAS, National 973 project grant, National Natural Science Foundation of China
In plants, the photosynthetic machinery photosystem II (PSII) consists of a core complex associated with variable numbers of light-harvesting complexes II (LHCIIs). The supercomplex, comprising a dimeric core and two strongly bound and two moderately bound LHCIIs (C 2 S 2 M 2 ), is the dominant form in plants acclimated to limited light. Here we report cryo-electron microscopy structures of two forms of C 2 S 2 M 2 (termed stacked and unstacked) from Pisum sativum at 2.7- and 3.2-angstrom resolution, respectively. In each C 2 S 2 M 2 , the moderately bound LHCII assembles specifically with a peripheral antenna complex CP24-CP29 heterodimer and the strongly bound LHCII, to establish a pigment network that facilitates light harvesting at the periphery and energy transfer into the core. The high mobility of peripheral antennae, including the moderately bound LHCII and CP24, provides insights into functional regulation of plant PSII.
Organizational Affiliation:
National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences (CAS), Beijing 100101, P.R. China.
For questions/corrections to specific PDB entries, including citation updates: email deposit-help@mail.wwpdb.org
Thank you for providing your feedback! Someone will be in touch with you shortly. This window will automatically close in 5 seconds.
Apologies, our feedback server is currently unavailable and we are troubleshooting the issue. In the meantime, please copy and paste the below information into an email addressed to info@rcsb.org