PSI-LHCI of Chlamydomonas reinhardtii: Increasing the absorption cross section without losing efficiency.

ABSTRACT: Photosystem I (PSI) is an essential component of photosynthetic membranes. Despite the high sequence and structural homologies, its absorption properties differ substantially in algae, plants and cyanobacteria. In particular it is characterized by the presence of low-energy chlorophylls (red forms), the number and the energy of which vary in different organisms. The PSI-LHCI (PSI-light harvesting complex I) complex of the green alga Chlamydomonas reinhardtii (C.r.) is significantly larger than that of plants, containing five additional light-harvesting complexes (together binding≈65 chlorophylls), and contains red forms with higher energy than plants. To understand how these differences influence excitation energy transfer and trapping in the system, we studied two PSI-LHCI C.r. particles,

SUBMITTER: Le Quiniou C 

PROVIDER: S-EPMC4547092 | biostudies-literature | 2015 Apr-May

REPOSITORIES: biostudies-literature