Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8298673 | Biochimica et Biophysica Acta (BBA) - Bioenergetics | 2018 | 8 Pages |
Abstract
It has already been established that the quaternary structure of the main light-harvesting complex (LH2) from the photosynthetic bacterium Rhodopseudomonas palustris is a nonameric 'ring' of PucAB heterodimers and under low-light culturing conditions an increased diversity of PucB synthesis occurs. In this work, single molecule fluorescence emission studies show that different classes of LH2 'rings' are present in “low-light” adapted cells and that an unknown chaperon process creates multiple sub-types of 'rings' with more conformational sub-states and configurations. This increase in spectral disorder significantly augments the cross-section for photon absorption and subsequent energy flow to the reaction centre trap when photon availability is a limiting factor. This work highlights yet another variant used by phototrophs to gather energy for cellular development.
Keywords
Related Topics
Life Sciences
Agricultural and Biological Sciences
Plant Science
Authors
Cristian Ilioaia, Tjaart P.J. Krüger, Oana Ilioaia, Bruno Robert, Rienk van Grondelle, Andrew Gall,