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 language | English (US) |
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Pages (from-to) | 1433-1436 |
Number of pages | 4 |
Journal | Plant and Cell Physiology |
Volume | 46 |
Issue number | 8 |
DOIs | |
State | Published - 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