Flavodiiron Proteins in Oxygenic Photosynthetic Organisms: Photoprotection of Photosystem II by Flv2 and Flv4 in Synechocystis sp PCC 6803

: Zhang PP, Allahverdiyeva Y, Eisenhut M, Aro EM

Publisher: PUBLIC LIBRARY SCIENCE

: 2009

: PLoS ONE

: PLOS ONE

: ARTN e5331

: 4

: 12

: 1932-6203

DOI: https://doi.org/10.1371/journal.pone.0005331

Significance: Analysis of published sequences revealed the presence of cyanobacteria-like FDPs also in some oxygenic photosynthetic eukaryotes like green algae, mosses and lycophytes. Our data provide evidence that Flv2 and Flv4 have an important role in photoprotection of water-splitting PSII against oxidative stress when the cells are acclimated to air level CO2. It is conceivable that the function of FDPs has changed during evolution from protection against oxygen in anaerobic microbes to protection against reactive oxygen species thus making the sustainable function of oxygen evolving PSII possible. Higher plants lack FDPs and distinctly different mechanisms have evolved for photoprotection of PSII.