Open reading frame ssr2016 is required for antimycin A-sensitive photosystem I-driven cyclic electron flow in the cyanobacterium Synechocystis sp. PCC 6803

Nataliya Yeremenko, Robert Jeanjean, Peerada Prommeenate, Vladimir Krasikov, Peter J. Nixon, Willem Vermaas, Michel Havaux, Hans C P Matthijs

Research output: Contribution to journalArticle

76 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)1433-1436
Number of pages4
JournalPlant and Cell Physiology
Volume46
Issue number8
DOIs
StatePublished - Aug 1 2005

Keywords

  • Antimycin A
  • Ferredoxin quinone reductase
  • Photosystem I cyclic electron transport
  • Synechocystis sp. PCC 6803
  • ssr2016

ASJC Scopus subject areas

  • Physiology
  • Plant Science
  • Cell Biology

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