ArticleApplied and environmental microbiology2015
Dynamics of Photosynthesis in a Glycogen-Deficient glgC Mutant of Synechococcus sp. Strain PCC 7002.
Article in Applied and environmental microbiology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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Who cites it
17 citing papers in PubMed, 35 citations in OpenAlex.
- Photosynthetic production of glutamine through metabolic analysis-based engineering ofMetabolic engineering communications · 2026Article
- Glycogen deficiency impairs diurnal energy metabolism and cell division in Synechocystis.Plant physiology · 2026Article
- Physiological and molecular evidence for phycobilisome degradation in maintaining carbon and nitrogen balance of cyanobacteria.Marine life science & technology · 2025Article
- Glycogen deficiency enhances carbon partitioning into glutamate for an alternative extracellular metabolic sink in cyanobacteria.Communications biology · 2024Article
- Circular cell culture for sustainable food production using recombinant lactate-assimilating cyanobacteria that supplies pyruvate and amino acids.Archives of microbiology · 2023Article
- L-Lactate treatment by photosynthetic cyanobacteria expressing heterogeneous L-lactate dehydrogenase.Scientific reports · 2023Article
- Stress response requires an efficient connection between glycogen and central carbon metabolism by phosphoglucomutases in cyanobacteria.Journal of experimental botany · 2023Article
- Dynamic diel proteome and daytime nitrogenase activity supports buoyancy in the cyanobacterium Trichodesmium.Nature microbiology · 2022Article
- Enhancing carbohydrate repartitioning into lipid and carotenoid by disruption of microalgae starch debranching enzyme.Communications biology · 2021Article
- Overexpression of bicarbonate transporters in the marine cyanobacteriumBiotechnology for biofuels · 2020Article
- Cyanobacterial carboxysome mutant analysis reveals the influence of enzyme compartmentalization on cellular metabolism and metabolic network rigidity.Metabolic engineering · 2019Article
- On the use of oxygenic photosynthesis for the sustainable production of commodity chemicals.Physiologia plantarum · 2019Article
- A Hard Day's Night: Cyanobacteria in Diel Cycles.Trends in microbiology · 2019Review
- Light-optimized growth of cyanobacterial cultures: Growth phases and productivity of biomass and secreted molecules in light-limited batch growth.Metabolic engineering · 2018Article
- Transcriptome landscape of Synechococcus elongatus PCC 7942 for nitrogen starvation responses using RNA-seq.Scientific reports · 2016Article
- The Multiple Functions of Common Microbial Carbon Polymers, Glycogen and PHB, during Stress Responses in the Non-Diazotrophic Cyanobacterium Synechocystis sp. PCC 6803.Frontiers in microbiology · 2016Article
- Factors Altering Pyruvate Excretion in a Glycogen Storage Mutant of the Cyanobacterium, Synechococcus PCC7942.Frontiers in microbiology · 2016Article
Corrections and comments
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Authors and funding
5 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Cyanobacterial glycogen-deficient mutants display impaired degradation of light-harvesting phycobilisomes under nitrogen-limiting growth conditions and secrete a suite of organic acids as a putative reductant-spilling mechanism. This genetic background, therefore, represents an important platform to better understand the complex relationships between light harvesting, photosynthetic electron transport, carbon fixation, and carbon/nitrogen metabolisms. In this study, we conducted a comprehensive analysis of the dynamics of photosynthesis as a function of reductant sink manipulation in a glycogen-deficient glgC mutant of Synechococcus sp. strain PCC 7002. The glgC mutant showed increased susceptibility to photoinhibition during the initial phase of nitrogen deprivation. However, after extended periods of nitrogen deprivation, glgC mutant cells maintained higher levels of photosynthetic activity than the wild type, supporting continuous organic acid secretion in the absence of biomass accumulation. In contrast to the wild type, the glgC mutant maintained efficient energy transfer from phycobilisomes to photosystem II (PSII) reaction centers, had an elevated PSII/PSI ratio as a result of reduced PSII degradation, and retained a nitrogen-replete-type ultrastructure, including an extensive thylakoid membrane network, after prolonged nitrogen deprivation. Together, these results suggest that multiple global signals for nitrogen deprivation are not activated in the glgC mutant, allowing the maintenance of active photosynthetic complexes under conditions where photosynthesis would normally be abolished.
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