%A Hoang Long Nguyen
%A Thanh Nhut Do
%A Kai Zhong
%A Parveen Akhtar
%A Thomas L. C. Jansen
%A Jasper Knoester
%A Stefano Caffarri
%A Petar Lambrev
%A Howe-Siang Tan
%J SCIENCE ADVANCES
%T Inter-subunit energy transfer processes in a minimal plant photosystem II supercomplex
%X Photosystem II (PSII) is an integral part of the photosynthesis machinery, in which several light-harvesting complexes rely on inter-complex excitonic energy transfer (EET) processes to channel energy to the reaction center. In this paper, we report on a direct observation of the inter-complex EET in a minimal PSII supercomplex from plants, containing the trimeric light-harvesting complex II (LHCII), the monomeric light-harvesting complex CP26, and the monomeric PSII core complex. Using two-dimensional (2D) electronic spectroscopy, we measure an inter-complex EET timescale of 50 picoseconds for excitations from the LHCII-CP26 peripheral antenna to the PSII core. The 2D electronic spectra also reveal that the transfer timescale is nearly constant over the pump spectrum of 600 to 700 nanometers. Structure-based calculations reveal the contribution of each antenna complex to the measured inter-complex EET time. These results provide a step in elucidating the full inter-complex energy transfer network of the PSII machinery.
%N 8
%V 10
%D 2024
%R MTMT:34720357 10.1126/sciadv.adh0911
%L REAL217805