title: Open reading frame ssr2016 is required for antimycin A-sensitive photosystem I-driven cyclic electron flow in the cyanobacterium Synechocystis sp. PCC 6803.
abstract: Open reading frame ssr2016 encodes a protein with substantial sequence similarities to PGR5 identified as a component of the antimycin A-sensitive ferredoxin:plastoquinone reductase (FQR) in PSI cyclic photophosphorylation in Arabidopsis thaliana. We studied cyclic electron flow in Synechocystis sp. PCC 6803 in vivo in ssr2016 deletion mutants generated either in a wild-type background or in a ndhB deletion mutant. Our results indicate that ssr2016 is required for FQR and that it operates in a parallel pathway to the NDH1 complex. The ssr2016 deletion mutants are high light sensitive, suggesting that FQR might be important in controlling redox poise under adverse conditions.
authors.affiliation: Aquatic Microbiology, Institute for Biodiversity and Ecosystem Dynamics, Faculty of Science, University of Amsterdam, Nieuwe Achtergracht 127, 1018 WS Amsterdam, The Netherlands.
authors.forename: Nataliya
authors.initials: N
authors.lastname: Yeremenko
authors.forename: Robert
authors.initials: R
authors.lastname: Jeanjean
authors.forename: Peerada
authors.initials: P
authors.lastname: Prommeenate
authors.forename: Vladimir
authors.initials: V
authors.lastname: Krasikov
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Nixon
authors.forename: Wim F J
authors.initials: WF
authors.lastname: Vermaas
authors.forename: Michel
authors.initials: M
authors.lastname: Havaux
authors.forename: Hans C P
authors.initials: HC
authors.lastname: Matthijs
mesh_terms: D000968:Antimycin A / Q000494:pharmacology*; D029681:Arabidopsis Proteins / Q000378:metabolism; D004579:Electron Transport; D016366:Open Reading Frames; D045331:Photosystem I Protein Complex / Q000502:physiology*; D011808:Quinone Reductases / Q000378:metabolism; D046939:Synechocystis / Q000187:drug effects* / Q000235:genetics / Q000378:metabolism
chemical_list: D029681:Arabidopsis Proteins; D045331:Photosystem I Protein Complex; D000968:Antimycin A; C457770:FQR1 protein, Arabidopsis; D011808:Quinone Reductases