Effect of the mutation of carotenoids on the dynamics of energy transfer in light-harvesting complexes (LH2) from Rhodobacter sphaeroides 601 at room temperature
Liu Wei-Min(刘伟民)a), Liu Yuan(刘源)b), Liu Kang-Jun(刘康俊)a), Yan Yong-Li(闫永丽)a), Guo Li-Jun(郭立俊)c), Xu Chun-He(徐春和)b), and Qian Shi-Xiong(钱士雄)a)†
a Physics Department, Fudan University, Shanghai 200433, China; b Shanghai Institute of Plant Physiology & Ecology, Shanghai institute for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China; c Physics Department, Henan University, Kaifeng 475001, China
Abstract Energy transfers in two kinds of peripheral light-harvesting complexes (LH2) of Rhodobacter sphaeroides (RS) 601 are studied by using femtosecond pump--probe spectroscopy with tunable laser wavelength at room temperature. These two complexes are native LH2 (RS601) and green carotenoid mutated LH2 (GM309). The obtained results demonstrate that, compared with spheroidenes with ten conjugated double bonds in native RS601, carotenoid in GM309 containing neurosporenes with nine conjugated double bonds can lead to a reduction in energy transfer rate in the B800-to-B850 band and the disturbance in the energy relaxation processes within the excitonic B850 band.
Received: 07 January 2006
Revised: 20 April 2006
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10274013).
Cite this article:
Liu Wei-Min(刘伟民), Liu Yuan(刘源), Liu Kang-Jun(刘康俊), Yan Yong-Li(闫永丽), Guo Li-Jun(郭立俊), Xu Chun-He(徐春和), and Qian Shi-Xiong(钱士雄) Effect of the mutation of carotenoids on the dynamics of energy transfer in light-harvesting complexes (LH2) from Rhodobacter sphaeroides 601 at room temperature 2006 Chinese Physics 15 1725
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