Mutations in a putative chloride efflux transporter gene suppress the chloride requirement of photosystem II in the cytochrome c550-deficient mutant

Plant & Cell Physiology
Mari KobayashiMasahiko Ikeuchi

Abstract

The cytochrome c550-deficient mutant (psbV-disruptant) of Synechocystis requires a high concentration of Cl(-) in the culture medium to support photosynthetic oxygen evolution. From this disruptant, we isolated spontaneous suppressor mutants that are able to grow photoautotrophically in the absence of Cl(-). Three independent mutations were identified: one was a deletion in slr0753 and two were a transposition of related insertion sequences in the same slr0753. The deduced product of slr0753 belongs to a novel group of the superfamily of ion efflux pumps and ion transporters. These results suggest that Slr0753 exports Cl(-) or a related anion, which is essential for PSII oxygen evolution.

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Citations

Jan 4, 2007·Photosynthesis Research·Johnna L RooseHimadri B Pakrasi
Oct 17, 2012·DNA Research : an International Journal for Rapid Publication of Reports on Genes and Genomes·Danika TrautmannWolfgang R Hess
Jul 9, 2008·Applied and Environmental Microbiology·Tina C Summerfield, Louis A Sherman
Mar 9, 2011·Journal of Photochemistry and Photobiology. B, Biology·Kristin BeckerMarc M Nowaczyk
Jul 14, 2010·FEMS Microbiology Reviews·Martin Hagemann
Dec 17, 2014·ELife·Nicholas W BellonoElena Oancea
Apr 17, 2018·Plant & Cell Physiology·Christoph-Martin Geilfus

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