The role of exciton delocalization in the major photosynthetic light-harvesting antenna of plants.

ABSTRACT: In the major peripheral plant light-harvesting complex LHCII, excitation energy is transferred between chlorophylls along an energetic cascade before it is transmitted further into the photosynthetic assembly to be converted into chemical energy. The efficiency of these energy transfer processes involves a complicated interplay of pigment-protein structural reorganization and protein dynamic disorder, and the system must stay robust within the fluctuating protein environment. The final, lowest energy site has been proposed to exist within a trimeric excitonically coupled chlorophyll (Chl) cluster, comprising Chls a610-a611-a612. We studied an LHCII monomer with a site-specific mutation resulting in the loss of Chls a611and a612, and find that this mutant exhibits two predominant overlappin

SUBMITTER: Ramanan C 

PROVIDER: S-EPMC4375621 | biostudies-literature | 2015 Mar

REPOSITORIES: biostudies-literature