ArticlePlant physiology1997
Circadian Regulation of Sucrose Phosphate Synthase Activity in Tomato by Protein Phosphatase Activity.
Article in Plant physiology, 1997. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
13 citing papers in PubMed, 41 citations in OpenAlex.
- Steady-stateFrontiers in plant science · 2026Article
- The end game(s) of photosynthetic carbon metabolism.Plant physiology · 2024Review
- Photosynthetic adaptation strategies in peppers under continuous lighting: insights into photosystem protection.Frontiers in plant science · 2024Article
- Identification of source-sink tissues in the leaf of Chinese cabbage (Brassica rapa ssp. pekinensis) by carbohydrate content and transcriptomic analysis.Genes & genomics · 2020Article
- Seasonal and temporal changes during storage affect quality attributes of green asparagus.Postharvest biology and technology · 2020Article
- Quantitative Circadian Phosphoproteomic Analysis of Arabidopsis Reveals Extensive Clock Control of Key Components in Physiological, Metabolic, and Signaling Pathways.Molecular & cellular proteomics : MCP · 2015Article
- Sugar-mediated semidian oscillation of gene expression in the cassava storage root regulates starch synthesis.Plant signaling & behavior · 2008Article
- Light regulation of sucrose-phosphate synthase activity in the freezing-tolerant grass Deschampsia antarctica.Photosynthesis research · 2005Article
- Article
- Oscillation of mRNA level and activity of granule-bound starch synthase I in Arabidopsis leaves during the day/night cycle.Plant molecular biology · 2003Article
- Low temperature induces expression of nitrate reductase in tomato that temporarily overrides circadian regulation of activity.Photosynthesis research · 2002Article
- Expression of the granule-bound starch synthase I (Waxy) gene from snapdragon is developmentally and circadian clock regulatedPlant physiology · 1999Article
- Chilling delays circadian pattern of sucrose phosphate synthase and nitrate reductase activity in tomatoPlant physiology · 1998Article
Corrections and comments
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Authors and funding
2 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Sucrose phosphate synthase (SPS), a key enzyme in sucrose biosynthesis, is regulated by protein phosphorylation and shows a circadian pattern of activity in tomato. SPS is most active in its dephosphorylated state, which normally coincides with daytime. Applying okadaic acid, a potent protein phosphatase inhibitor, prevents SPS activation. More interesting is that a brief treatment with cycloheximide, a cytoplasmic translation inhibitor, also prevents the light activation of SPS without any effect on the amount of SPS protein. Cordycepin, an inhibitor of transcript synthesis and processing, has the same effect. Both of these inhibitors also prevent the activation phase of the circadian rhythm in SPS activity. Conversely, cycloheximide and cordycepin do not prevent the decline in circadian SPS activity that normally occurs at night. These observations indicate that SPS phosphatase activity but not SPS kinase activity is controlled, directly or indirectly, at the level of gene expression. Taken together, these data imply that there is a circadian rhythm controlling the transcription of a protein phosphatase that subsequently dictates the circadian rhythm in SPS activity via effects on this enzyme's phosphorylation state.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.