Format

Send to

Choose Destination
Biochim Biophys Acta Bioenerg. 2019 May 1;1860(5):433-438. doi: 10.1016/j.bbabio.2018.12.005. Epub 2019 Mar 7.

The mechanism of cyclic electron flow.

Author information

1
Institut de Biologie Physico-Chimique, UMR 7141 CNRS-UPMC, 13 rue P. et M. Curie, 75005 Paris, France; Laboratoire de Génétique et Physiologie des Microalgues, Institut de Botanique, Université de Liège, 4, Chemin de la Vallée, B-4000 Liège, Belgium. Electronic address: w.j.nawrocki@vu.nl.
2
Institut de Biologie Physico-Chimique, UMR 7141 CNRS-UPMC, 13 rue P. et M. Curie, 75005 Paris, France.
3
Institut de Biologie Physico-Chimique, UMR 7099 CNRS-UPMC, 13 rue P. et M. Curie, 75005 Paris, France.
4
Laboratoire de Génétique et Physiologie des Microalgues, Institut de Botanique, Université de Liège, 4, Chemin de la Vallée, B-4000 Liège, Belgium.

Abstract

Apart from the canonical light-driven linear electron flow (LEF) from water to CO2, numerous regulatory and alternative electron transfer pathways exist in chloroplasts. One of them is the cyclic electron flow around Photosystem I (CEF), contributing to photoprotection of both Photosystem I and II (PSI, PSII) and supplying extra ATP to fix atmospheric carbon. Nonetheless, CEF remains an enigma in the field of functional photosynthesis as we lack understanding of its pathway. Here, we address the discrepancies between functional and genetic/biochemical data in the literature and formulate novel hypotheses about the pathway and regulation of CEF based on recent structural and kinetic information.

KEYWORDS:

Biophysics; Cyclic electron flow; Cytochrome b(6)f; Photosynthesis; Photosystem I; Plastoquinone

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center