ArticlePlant physiology2009
An Rrf2-type transcriptional regulator is required for expression of psaAB genes in the cyanobacterium Synechocystis sp. PCC 6803.
Article in Plant physiology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed, 15 citations in OpenAlex.
- Biosynthesis of a sulfated exopolysaccharide, synechan, and bloom formation in the model cyanobacteriumeLife · 2021Article
- CugP is a novel ubiquitous non-GalU-type bacterial UDP-glucose pyrophosphorylase found in cyanobacteria.Journal of bacteriology · 2014Article
- Exploration of the role of the non-coding RNA SbrE in L. monocytogenes stress response.International journal of molecular sciences · 2012Article
- Acclimation to high-light conditions in cyanobacteria: from gene expression to physiological responses.Journal of plant research · 2012Review
- Role of multiple HLR1 sequences in the regulation of the dual promoters of the psaAB genes in Synechocystis sp. PCC 6803.Journal of bacteriology · 2010Article
- Cyanobacteriochrome CcaS regulates phycoerythrin accumulation in Nostoc punctiforme, a group II chromatic adapter.Proceedings of the National Academy of Sciences of the United States of America · 2010Article
Corrections and comments
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Photosynthetic organisms must regulate photosystem stoichiometry (photosystem I-to-photosystem II ratio) under various light conditions. Transcriptional regulation of the psaAB genes is a critical process for this photoacclimation in cyanobacteria. In the course of our screening of transcriptional regulators in the cyanobacterium Synechocystis sp. PCC 6803, we found that chlorophyll accumulation was impaired in an Rrf2-type regulator Slr0846 mutant. DNA microarray and primer extension analyses showed that the expression of psaAB genes was markedly decreased in the mutant. Consistently, the mutant exhibited lower photosystem I-to-photosystem II ratio under normal light conditions, suggestive of decreased accumulation of the photosystem I reaction center. Gel-shift assay confirmed that the Slr0846 protein bound to a far upstream promoter region of psaAB. These phenotypes of the mutant varied substantially with light conditions. These results suggest that Slr0846 is a novel transcriptional regulator for optimal expression of psaAB.
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