title: [Search for an optimal orientational ordering of Qy transition dipoles of subantennae molecules in superantenna of photosynthetic green bacteria. Model calculations].
abstract: This work continues a series of our investigations on efficient strategies of functioning of natural light-harvesting antennae, initiated by our concept of rigorous optimization of photosynthetic apparatus structure by functional criterion. Using computer modeling for the functioning of the natural antennae, we suggested some basic principles for designing optimal model systems. Targeted searches for these principles in in vivo systems allowed us to recognize some of them in natural antennae. This work deals with the problem of the structure optimization of nonuniform superantennae of photosynthetic green bacteria. These superantennae consist of several uniform subantennae which produces a problem of their optimal coordination. In this work, we used mathematical modeling for the functioning of these natural superantennae to consider a possible way to optimize the superantenna structure using optimization of mutual spatial orientation of Qy transition dipoles of subantennae pigments. This allowed us to determine some modes of optimal orientational ordering of Qy transition dipoles of subantennae pigments in the model of the green bacterium Chloroflexus aurantiacus superantenna. It was shown that the optimal mutual orientation of Qy transition dipoles of subantennae pigments (resulting in stable minimizing of the energy transfer time within the superantenna and, as a consequence, in decrease in energy losses) ensures the high efficiency and stability of the superatenna functioning.
authors: A V
authors: AV
authors: Zobova
authors: A G
authors: AG
authors: Iakovlev
authors: A S
authors: AS
authors: Taisova
authors: Z G
authors: ZG
authors: Fetisova
mesh_terms: D001426:Bacterial Proteins / Q000737:chemistry* / Q000502:physiology; D041862:Chloroflexi / Q000502:physiology*; D004735:Energy Transfer; D045342:Light-Harvesting Protein Complexes / Q000737:chemistry* / Q000502:physiology; D008954:Models, Biological; D010788:Photosynthesis / Q000502:physiology*; D010860:Pigments, Biological / Q000737:chemistry* / Q000502:physiology; D011487:Protein Conformation
chemical_list: D001426:Bacterial Proteins; D045342:Light-Harvesting Protein Complexes; D010860:Pigments, Biological