ArticlePlant physiology2007
Carbon cycling in Anabaena sp. PCC 7120. Sucrose synthesis in the heterocysts and possible role in nitrogen fixation.
Article in Plant physiology, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers.
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35 citing papers in PubMed, 90 citations in OpenAlex.
- Cyanobacteria-Derived Extracellular Vesicles: A Novel Frontier in Drug Delivery and Therapeutics.International journal of molecular sciences · 2025Review
- Stochastic Character Mapping, Bayesian Model Selection, and Biosynthetic Pathways Shed New Light on the Evolution of Habitat Preference in Cyanobacteria.Systematic biology · 2024Article
- Anti-echinococcal effect of metformin in advanced experimental cystic echinococcosis: reprogrammed intermediary carbon metabolism in the parasite.Antimicrobial agents and chemotherapy · 2024Article
- Current Metabolic Engineering Strategies for Photosynthetic Bioproduction in Cyanobacteria.Microorganisms · 2023Review
- Flv3A facilitates OThe New phytologist · 2023Article
- Cyanobacteria as cell factories for the photosynthetic production of sucrose.Frontiers in microbiology · 2023Review
- Exploring the Diversity of the Thioredoxin Systems in Cyanobacteria.Antioxidants (Basel, Switzerland) · 2022Review
- The Beneficial Effects of Cyanobacterial Co-Culture on Plant Growth.Life (Basel, Switzerland) · 2022Review
- Proteogenomic Analysis Provides Novel Insight into Genome Annotation and Nitrogen Metabolism inMicrobiology spectrum · 2021Article
- A Genome-Scale Metabolic Model ofMetabolites · 2021Article
- Real-time monitoring of the in vivo redox state transition using the ratiometric redox state sensor protein FROG/B.Proceedings of the National Academy of Sciences of the United States of America · 2020Article
- Article
- Thioredoxin targets are regulated in heterocysts of cyanobacterium Anabaena sp. PCC 7120 in a light-independent manner.Journal of experimental botany · 2020Article
- Freshwater CyanobacteriumApplied and environmental microbiology · 2020Article
- Article
- Heterocyst Thylakoid Bioenergetics.Life (Basel, Switzerland) · 2019Review
- The genes and enzymes of sucrose metabolism in moderately thermophilic methanotroph Methylocaldum szegediense O12.Extremophiles : life under extreme conditions · 2018Article
- Spatial separation of photosynthesis and ethanol production by cell type-specific metabolic engineering of filamentous cyanobacteria.Applied microbiology and biotechnology · 2018Article
- A Comprehensively Curated Genome-Scale Two-Cell Model for the Heterocystous Cyanobacterium Anabaena sp. PCC 7120.Plant physiology · 2017Article
- Diazotrophic specific cytochrome c oxidase required to overcome light stress in the cyanobacterium Nostoc muscorum.World journal of microbiology & biotechnology · 2016Article
Corrections and comments
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Authors and funding
4 authors at 1 institution in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Nitrogen (N) available to plants mostly originates from N(2) fixation carried out by prokaryotes. Certain cyanobacterial species contribute to this energetically expensive process related to carbon (C) metabolism. Several filamentous strains differentiate heterocysts, specialized N(2)-fixing cells. To understand how C and N metabolism are regulated in photodiazotrophically grown organisms, we investigated the role of sucrose (Suc) biosynthesis in N(2) fixation in Anabaena sp. PCC 7120 (also known as Nostoc sp. PCC 7120). The presence of two Suc-phosphate synthases (SPS), SPS-A and SPS-B, directly involved in Suc synthesis with different glucosyl donor specificity, seems to be important in the N(2)-fixing filament. Measurement of enzyme activity and polypeptide levels plus reverse transcription-polymerase chain reaction experiments showed that total SPS expression is greater in cells grown in N(2) versus combined N conditions. Only SPS-B, however, was seen to be active in the heterocyst, as confirmed by analysis of green fluorescent protein reporters. SPS-B gene expression is likely controlled at the transcriptional initiation level, probably in relation to a global N regulator. Metabolic control analysis indicated that the metabolism of glycogen and Suc is likely interconnected in N(2)-fixing filaments. These findings suggest that N(2) fixation may be spatially compatible with Suc synthesis and support the role of the disaccharide as an intermediate in the reduced C flux in heterocyst-forming cyanobacteria.
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