Abstract
Fructose-6-phosphate 2-kinase and fructose-2,6-bisphosphatase have been partially purified from spinach leaves and their regulatory properties studied. Fructose-6-phosphate 2-kinase was activated by phosphate and fructose 6-phosphate, and inhibited by 3-phosphoglycerate and dihydroxyacetone phosphate. Fructose-2,6-bisphosphatase was inhibited by fructose 6-phosphate and phosphate. The interaction between these effectors was studied when they were varied, alone or in combination, over a range of concentrations representative of those in the cytosol of spinach leaf cells. In conditions when dihydroxyacetone phosphate or 3-phosphoglycerate rise, as is typical during photosynthesis, the fructose 2,6-bisphosphate level will decrease, which will favour sucrose synthesis. In conditions when fructose 6-phosphate accumulates, fructose 2,6-bisphosphate should rise, which will favour a restriction of sucrose synthesis and promotion of starch synthesis.
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Claims 11
Claim · model-written summary
Phosphate activated fructose-6-phosphate 2-kinase.
- Taxon
- spinach
Spinacia oleraceat0 - Gene
- Fructose-6-phosphate 2-kinasee0
- Compound
- phosphatee0
- Outcome
- Fructose-6-phosphate 2-kinasee0
- Direction
- activatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fructose-6-phosphate 2-kinase was activated by phosphate”
t0“spinach leaves”
Claim · model-written summary
Fructose 6-phosphate activated fructose-6-phosphate 2-kinase.
- Taxon
- spinachSpinacia oleraceat0
- Gene
- Fructose-6-phosphate 2-kinasee0
- Compound
- fructose 6-phosphatee0
- Outcome
- Fructose-6-phosphate 2-kinasee0
- Direction
- activatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fructose-6-phosphate 2-kinase was activated by phosphate and fructose 6-phosphate”
t0“spinach leaves”
Claim · model-written summary
3-phosphoglycerate inhibited fructose-6-phosphate 2-kinase.
- Taxon
- spinachSpinacia oleraceat0
- Gene
- Fructose-6-phosphate 2-kinasee0
- Compound
- 3-phosphoglyceratee0
- Outcome
- Fructose-6-phosphate 2-kinasee0
- Direction
- inhibitede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fructose-6-phosphate 2-kinase was activated by phosphate and fructose 6-phosphate, and inhibited by 3-phosphoglycerate”
t0“spinach leaves”
Claim · model-written summary
Dihydroxyacetone phosphate inhibited fructose-6-phosphate 2-kinase.
- Taxon
- spinachSpinacia oleraceat0
- Gene
- Fructose-6-phosphate 2-kinasee1
- Compound
- dihydroxyacetone phosphatee0
- Outcome
- Fructose-6-phosphate 2-kinasee1
- Direction
- inhibitede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inhibited by 3-phosphoglycerate and dihydroxyacetone phosphate”
e1“Fructose-6-phosphate 2-kinase was activated”
t0“spinach leaves”
Claim · model-written summary
Fructose 6-phosphate inhibited fructose-2,6-bisphosphatase.
- Taxon
- spinachSpinacia oleraceat0
- Gene
- Fructose-2,6-bisphosphatasee0
- Compound
- fructose 6-phosphatee0
- Outcome
- Fructose-2,6-bisphosphatasee0
- Direction
- inhibitede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fructose-2,6-bisphosphatase was inhibited by fructose 6-phosphate and phosphate”
t0“spinach leaves”
Claim · model-written summary
Phosphate inhibited fructose-2,6-bisphosphatase.
- Taxon
- spinachSpinacia oleraceat0
- Gene
- Fructose-2,6-bisphosphatasee0
- Compound
- phosphatee0
- Outcome
- Fructose-2,6-bisphosphatasee0
- Direction
- inhibitede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fructose-2,6-bisphosphatase was inhibited by fructose 6-phosphate and phosphate”
t0“spinach leaves”
Claim · model-written summary
A rise in dihydroxyacetone phosphate or 3-phosphoglycerate was predicted to lower fructose 2,6-bisphosphate.
- Taxon
- spinachSpinacia oleraceat0
- Compound
- dihydroxyacetone phosphate or 3-phosphoglyceratee0
- Outcome
- fructose 2,6-bisphosphate levele0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when dihydroxyacetone phosphate or 3-phosphoglycerate rise, as is typical during photosynthesis, the fructose 2,6-bisphosphate level will decrease”
t0“spinach leaves”
Claim · model-written summary
Lower fructose 2,6-bisphosphate was predicted to favor sucrose synthesis.
- Taxon
- spinachSpinacia oleraceat0
- Compound
- fructose 2,6-bisphosphatee0
- Outcome
- sucrose synthesise0
- Qualifier
- will favoure0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the fructose 2,6-bisphosphate level will decrease, which will favour sucrose synthesis”
t0“spinach leaves”
Claim · model-written summary
Fructose 6-phosphate accumulation was predicted to raise fructose 2,6-bisphosphate.
- Taxon
- spinachSpinacia oleraceat0
- Compound
- fructose 6-phosphatee0
- Outcome
- fructose 2,6-bisphosphatee0
- Direction
- risee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when fructose 6-phosphate accumulates, fructose 2,6-bisphosphate should rise”
t0“spinach leaves”
Claim · model-written summary
Increased fructose 2,6-bisphosphate was predicted to restrict sucrose synthesis.
- Taxon
- spinachSpinacia oleraceat0
- Compound
- fructose 2,6-bisphosphatee0
- Outcome
- restriction of sucrose synthesise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fructose 2,6-bisphosphate should rise, which will favour a restriction of sucrose synthesis”
t0“spinach leaves”
Claim · model-written summary
Increased fructose 2,6-bisphosphate was predicted to promote starch synthesis.
- Taxon
- spinachSpinacia oleraceat0
- Compound
- fructose 2,6-bisphosphatee0
- Outcome
- promotion of starch synthesise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fructose 2,6-bisphosphate should rise, which will favour a restriction of sucrose synthesis and promotion of starch synthesis”
t0“spinach leaves”