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- W2079793442 abstract "Linear optical spectra of solubilized trimers and small lamellar aggregates of the major light-harvesting complex II (LHCII) of higher plants are simulated employing excitonic couplings and site energies of chlorophylls (Chls) computed on the basis of the two crystal structures by a combined quantum chemical/electrostatic approach. A good agreement between simulation and experiment is achieved (except for the circular dichroism in the Chl b region), if vibronic transitions of Chls are taken into account. Site energies are further optimized by refinement fits of optical spectra. The differences between refined and directly calculated values are not significant enough to decide, whether the crystal structures are closer to trimers or aggregates. Changes in the linear dichroism spectrum upon aggregation are related to site energy shifts of Chls b601, b607, a603, a610, and a613, and are interpreted in terms of conformational changes of violaxanthin and the two luteins involving their ionone rings. Chl a610 is the energy sink at 77 K in both conformations. An analysis of absorption spectra of trimers perpendicular and parallel to the C3-axis (van Amerongen et al. Biophys. J. 67 (1994) 837–847) shows that only Chl a604 close to neoxanthin is significantly reoriented in trimers compared to the crystal structures. Whether this pigment is orientated in aggregates as in the crystal structures, can presently not be determined faithfully. To finally decide about pigment reorientations that could be of relevance for non-photochemical quenching, further polarized absorption and fluorescence measurements of aggregates or detergent-depleted LHCII would be helpful. This article is part of a Special Issue entitled: Photosynthesis Research for Sustainability: from Natural to Artificial." @default.
- W2079793442 created "2016-06-24" @default.
- W2079793442 creator A5007987108 @default.
- W2079793442 creator A5008920813 @default.
- W2079793442 date "2012-08-01" @default.
- W2079793442 modified "2023-10-05" @default.
- W2079793442 title "Refined structure-based simulation of plant light-harvesting complex II: Linear optical spectra of trimers and aggregates" @default.
- W2079793442 cites W1574765786 @default.
- W2079793442 cites W1805686156 @default.
- W2079793442 cites W1969595562 @default.
- W2079793442 cites W1969771592 @default.
- W2079793442 cites W1969905575 @default.
- W2079793442 cites W1970487315 @default.
- W2079793442 cites W1972007160 @default.
- W2079793442 cites W1973336827 @default.
- W2079793442 cites W1978432257 @default.
- W2079793442 cites W1980400937 @default.
- W2079793442 cites W1983840674 @default.
- W2079793442 cites W1984959168 @default.
- W2079793442 cites W1985042684 @default.
- W2079793442 cites W1986867431 @default.
- W2079793442 cites W1987309132 @default.
- W2079793442 cites W1988048212 @default.
- W2079793442 cites W1989650297 @default.
- W2079793442 cites W1991258062 @default.
- W2079793442 cites W1992022525 @default.
- W2079793442 cites W1993871971 @default.
- W2079793442 cites W1995470326 @default.
- W2079793442 cites W1998253055 @default.
- W2079793442 cites W1999583720 @default.
- W2079793442 cites W2000367633 @default.
- W2079793442 cites W2001251165 @default.
- W2079793442 cites W2002338734 @default.
- W2079793442 cites W2005852578 @default.
- W2079793442 cites W2006454404 @default.
- W2079793442 cites W2006823377 @default.
- W2079793442 cites W2006887217 @default.
- W2079793442 cites W2010759594 @default.
- W2079793442 cites W2011793601 @default.
- W2079793442 cites W2012116542 @default.
- W2079793442 cites W2013854991 @default.
- W2079793442 cites W2013947994 @default.
- W2079793442 cites W2014911581 @default.
- W2079793442 cites W2019288835 @default.
- W2079793442 cites W2021065530 @default.
- W2079793442 cites W2022659807 @default.
- W2079793442 cites W2023972714 @default.
- W2079793442 cites W2028571118 @default.
- W2079793442 cites W2029667189 @default.
- W2079793442 cites W2030737497 @default.
- W2079793442 cites W2034831768 @default.
- W2079793442 cites W2034938365 @default.
- W2079793442 cites W2038193366 @default.
- W2079793442 cites W2044079791 @default.
- W2079793442 cites W2045834148 @default.
- W2079793442 cites W2046019734 @default.
- W2079793442 cites W2047760438 @default.
- W2079793442 cites W2048475421 @default.
- W2079793442 cites W2049675998 @default.
- W2079793442 cites W2050056663 @default.
- W2079793442 cites W2050650316 @default.
- W2079793442 cites W2051594171 @default.
- W2079793442 cites W2053396890 @default.
- W2079793442 cites W2056017309 @default.
- W2079793442 cites W2056417779 @default.
- W2079793442 cites W2060234842 @default.
- W2079793442 cites W2062115005 @default.
- W2079793442 cites W2062219023 @default.
- W2079793442 cites W2063050234 @default.
- W2079793442 cites W2064204909 @default.
- W2079793442 cites W2067177268 @default.
- W2079793442 cites W2067691933 @default.
- W2079793442 cites W2072228422 @default.
- W2079793442 cites W2072348818 @default.
- W2079793442 cites W2074922707 @default.
- W2079793442 cites W2075610716 @default.
- W2079793442 cites W2077725474 @default.
- W2079793442 cites W2079754698 @default.
- W2079793442 cites W2080295565 @default.
- W2079793442 cites W2081620547 @default.
- W2079793442 cites W2082031245 @default.
- W2079793442 cites W2084137690 @default.
- W2079793442 cites W2091407187 @default.
- W2079793442 cites W2092312863 @default.
- W2079793442 cites W2093238267 @default.
- W2079793442 cites W2095471229 @default.
- W2079793442 cites W2099494269 @default.
- W2079793442 cites W2102636864 @default.
- W2079793442 cites W2112275448 @default.
- W2079793442 cites W2112291612 @default.
- W2079793442 cites W2113216081 @default.
- W2079793442 cites W2116928722 @default.
- W2079793442 cites W2118044947 @default.
- W2079793442 cites W2121427878 @default.
- W2079793442 cites W2126140700 @default.
- W2079793442 cites W2132262459 @default.
- W2079793442 cites W2133071735 @default.
- W2079793442 cites W2134134359 @default.