@article{REAL217805, volume = {10}, number = {8}, title = {Inter-subunit energy transfer processes in a minimal plant photosystem II supercomplex}, author = {Hoang Long Nguyen and Thanh Nhut Do and Kai Zhong and Parveen Akhtar and Thomas L. C. Jansen and Jasper Knoester and Stefano Caffarri and Petar Lambrev and Howe-Siang Tan}, year = {2024}, journal = {SCIENCE ADVANCES}, url = {https://real.mtak.hu/217805/}, abstract = {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.} }