ArticleProceedings of the National Academy of Sciences of the United States of America1998
The cyanobacterium Synechococcus resists UV-B by exchanging photosystem II reaction-center D1 proteins.
Article in Proceedings of the National Academy of Sciences of the United States of America, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.
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Who cites it
33 citing papers in PubMed.
- Integrated Physiologic and Proteomic Analyses Reveal the Molecular Mechanism ofInternational journal of molecular sciences · 2024Article
- UV radiation and temperature increase alter the PSII function and defense mechanisms in a bloom-forming cyanobacteriumFrontiers in microbiology · 2024Article
- Responding to light signals: a comprehensive update on photomorphogenesis in cyanobacteria.Physiology and molecular biology of plants : an international journal of functional plant biology · 2023Review
- Resilience and Mitigation Strategies of Cyanobacteria under Ultraviolet Radiation Stress.International journal of molecular sciences · 2023Review
- Article
- Depletion of m-type thioredoxin impairs photosynthesis, carbon fixation, and oxidative stress in cyanobacteria.Plant physiology · 2021Article
- Enhanced antioxidant capacity and upregulated transporter genes contribute to the UV-B-induced increase in blinin in Conyza blinii.Environmental science and pollution research international · 2021Article
- Regulation of PSII function in Cyanothece sp. ATCC 51142 during a light-dark cycle.Photosynthesis research · 2019Article
- Article
- Article
- Algal light sensing and photoacclimation in aquatic environments.Plant, cell & environment · 2017Review
- Crystal structure and redox properties of a novel cyanobacterial heme protein with a His/Cys heme axial ligation and a Per-Arnt-Sim (PAS)-like domain.The Journal of biological chemistry · 2017Article
- Article
- UV-B-Heavy Metal Interaction: Comparative Evaluation on Photosynthetic Properties of Three Cyanobacteria.Current microbiology · 2016Article
- Natural isoforms of the Photosystem II D1 subunit differ in photoassembly efficiency of the water-oxidizing complex.Photosynthesis research · 2016Article
- Flavodiiron protein Flv2/Flv4-related photoprotective mechanism dissipates excitation pressure of PSII in cooperation with phycobilisomes in Cyanobacteria.Plant physiology · 2014Article
- Taxonomic and functional diversity provides insight into microbial pathways and stress responses in the saline Qinghai Lake, China.PloS one · 2014Article
- Green algae in alpine biological soil crust communities: acclimation strategies against ultraviolet radiation and dehydration.Biodiversity and conservation · 2014Article
- Natural variants of photosystem II subunit D1 tune photochemical fitness to solar intensity.The Journal of biological chemistry · 2013Article
- Prochlorococcus and Synechococcus have Evolved Different Adaptive Mechanisms to Cope with Light and UV Stress.Frontiers in microbiology · 2012Article
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5 authors.
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Abstract
Current ambient UV-B levels can significantly depress productivity in aquatic habitats, largely because UV-B inhibits several steps of photosynthesis, including the photooxidation of water catalyzed by photosystem II. We show that upon UV-B exposure the cyanobacterium Synechococcus sp. PCC 7942 rapidly changes the expression of a family of three psbA genes encoding photosystem II D1 proteins. In wild-type cells the psbAI gene is expressed constitutively, but strong accumulations of psbAII and psbAIII transcripts are induced within 15 min of moderate UV-B exposure (0.4 W/m2). This transcriptional response causes an exchange of two distinct photosystem II D1 proteins. D1:1 is encoded by psbAI, but on UV-B exposure, it is largely replaced by the alternate D1:2 form, encoded by both psbAII and psbAIII. The total content of D1 and other photosystem II reaction center protein, D2, remained unchanged throughout the UV exposure, as did the content and composition of the phycobilisome. Wild-type cells suffered only slight transient inhibition of photosystem II function under UV-B exposure. In marked contrast, under the same UV-B treatment, a mutant strain expressing only psbAI suffered severe (40%) and sustained inhibition of photosystem II function. Another mutant strain with constitutive expression of psbAII and psbAIII was almost completely resistant to the UV-B treatment, showing no inhibition of photosystem II function and only a slight drop in electron transport. In Synechococcus the rapid exchange of alternate D1 forms, therefore, accounts for much of the cellular resistance to UV-B inhibition of photosystem II activity and photosynthetic electron transport. This molecular plasticity may be an important element in community-level responses to UV-B, where susceptibility to UV-B inhibition of photosynthesis changes diurnally.
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