ArticlePlant physiology2012
The SigB σ factor regulates multiple salt acclimation responses of the cyanobacterium Synechocystis sp. PCC 6803.
Article in Plant physiology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.
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Who cites it
22 citing papers in PubMed, 58 citations in OpenAlex.
- Synergistic Effects of Light and Salinity on Carotenoid and Biomass Composition ofMarine drugs · 2026Article
- Roles of Close Homologues SigB and SigD in Heat and High Light Acclimation of the CyanobacteriumLife (Basel, Switzerland) · 2022Article
- The role of transcriptional repressor activity of LexA in salt-stress responses of the cyanobacterium Synechocystis sp. PCC 6803.Scientific reports · 2020Article
- Testing the Potential of Regulatory Sigma Factor Mutants for Wastewater Purification or Bioreactor Run in High Light.Current microbiology · 2020Article
- Genomic Survey of Salt Acclimation-Related Genes in the Halophilic Cyanobacterium Euhalothece sp. Z-M001.Scientific reports · 2020Article
- Using osmotic stress to stabilize mannitol production inBiotechnology for biofuels · 2020Article
- Article
- Inactivation of group 2 σ factors upregulates production of transcription and translation machineries in the cyanobacterium Synechocystis sp. PCC 6803.Scientific reports · 2018Article
- Comparative Genomics of the Baltic Sea Toxic CyanobacteriaFrontiers in microbiology · 2018Article
- 6S RNA plays a role in recovery from nitrogen depletion in Synechocystis sp. PCC 6803.BMC microbiology · 2017Article
- Translating Divergent Environmental Stresses into a Common Proteome Response through the Histidine Kinase 33 (Hik33) in a Model Cyanobacterium.Molecular & cellular proteomics : MCP · 2017Article
- Oxygen produced by cyanobacteria in simulated Archaean conditions partly oxidizes ferrous iron but mostly escapes-conclusions about early evolution.Photosynthesis research · 2016Article
- Spermidine Synthase is Required for Growth of Synechococcus sp. PCC 7942 Under Osmotic Stress.Current microbiology · 2016Article
- RNA-seq Profiling Reveals Novel Target Genes of LexA in the Cyanobacterium Synechocystis sp. PCC 6803.Frontiers in microbiology · 2016Article
- The Cyanobacterial Ribosomal-Associated Protein LrtA Is Involved in Post-Stress Survival in Synechocystis sp. PCC 6803.PloS one · 2016Article
- Salt acclimation of cyanobacteria and their application in biotechnology.Life (Basel, Switzerland) · 2014Review
- Sll0528, a Site-2-Protease, Is Critically Involved in Cold, Salt and Hyperosmotic Stress Acclimation of Cyanobacterium Synechocystis sp. PCC 6803.International journal of molecular sciences · 2014Article
- A transcriptional regulator Sll0794 regulates tolerance to biofuel ethanol in photosynthetic Synechocystis sp. PCC 6803.Molecular & cellular proteomics : MCP · 2014Article
- Sucrose synthesis in the nitrogen-fixing Cyanobacterium Anabaena sp. strain PCC 7120 is controlled by the two-component response regulator OrrA.Applied and environmental microbiology · 2014Article
- The omega subunit of the RNA polymerase core directs transcription efficiency in cyanobacteria.Nucleic acids research · 2014Article
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Authors and funding
6 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Changing of principal σ factor in RNA polymerase holoenzyme to a group 2 σ factor redirects transcription when cyanobacteria acclimate to suboptimal environmental conditions. The group 2 sigma factor SigB was found to be important for the growth of the cyanobacterium Synechocystis sp. PCC 6803 in high-salt (0.7 m NaCl) stress but not in mild heat stress at 43°C although the expression of the sigB gene was similarly highly, but only transiently up-regulated at both conditions. The SigB factor was found to regulate many salt acclimation processes. The amount of glucosylglycerol-phosphate synthase, a key enzyme in the production of the compatible solute glucosylglycerol, was lower in the inactivation strain ΔsigB than in the control strain. Addition of the compatible solute trehalose almost completely restored the growth of the ΔsigB strain at 0.7 m NaCl. High-salt conditions lowered the chlorophyll and phycobilin contents of the cells while protective carotenoid pigments, especially zeaxanthin and myxoxanthophyll, were up-regulated in the control strain. These carotenoids were up-regulated in the ΔsigCDE strain (SigB is the only functional group 2 σ factor) and down-regulated in the ΔsigB strain under standard conditions. In addition, the HspA heat shock protein was less abundant and more abundant in the ΔsigB and ΔsigCDE strains, respectively, than in the control strain in high-salt conditions. Some cellular responses are common to heat and salt stresses, but pretreatment with mild heat did not protect cells against salt shock although protection against heat shock was evident.
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