Transcription of a "silent" cyanobacterial psbA gene is induced by microaerobic conditions

Biochimica Et Biophysica Acta
Cosmin I SicoraEva-Mari Aro

Abstract

Cyanobacteria, contrary to higher plants, have a small psbA gene family encoding the reaction centre D1 protein subunit of photosystem II, the first macromolecular pigment-protein complex of the photosynthetic electron transport chain. Modulation of expression of multiple psbA genes in the family allows cyanobacteria to adapt to changing environmental conditions. To date, two different strategies for regulation of the psbA genes have emerged. One, characterized in Synechocystis PCC6803 and Gloeobacter violaceus PCC7421 involves the increased expression of one type of D1 protein to cope with the increased rate of damage. The other strategy, in Synechococcus PCC7942 and Anabaena PCC7120, is to replace the existing D1 with a new D1 form for the duration of the stress. However, most of the psbA gene families characterized to date contain also a divergent, apparently silent psbA gene of unknown function. This gene, present in Synechocystis, Anabaena and Thermosynechococcus elongatus BP-1 was not induced by any stress condition applied so far. Our data shows a reversible induction of the divergent psbA gene during the onset of argon-induced microaerobic conditions in Synechocystis, Anabaena and Thermosynechococcus elongatus. The unit...Continue Reading

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Citations

Aug 1, 2009·Cellular and Molecular Life Sciences : CMLS·Paula MuloEva-Mari Aro
Oct 19, 2011·Journal of Plant Research·Masayuki Muramatsu, Yukako Hihara
Mar 1, 2012·The Journal of Biological Chemistry·Miwa SugiuraAlain Boussac
Dec 29, 2012·The Journal of Biological Chemistry·David J VinyardG Charles Dismukes
Mar 27, 2013·Annual Review of Biochemistry·David J VinyardG Charles Dismukes
Jan 7, 2014·Biochimica Et Biophysica Acta·Miwa Sugiura, Alain Boussac
Mar 6, 2012·Biochimica Et Biophysica Acta·Marc M NowaczykMatthias Rögner
Feb 7, 2015·Molecular Biology and Evolution·Tanai CardonaA William Rutherford
Oct 26, 2018·Photosynthesis Research·Cosmin Ionel SicoraOana Sicora
Mar 31, 2010·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Albert GuskovAthina Zouni
Jun 20, 2020·Photosynthesis Research·Kevin J SheridanTina C Summerfield
Feb 20, 2014·Journal of the American Chemical Society·David J VinyardG Charles Dismukes

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