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ROLE AND REGULATION OF SUCROSE-PHOSPHATE SYNTHASE IN HIGHER PLANTS.
Sucrose-phosphate synthase (SPS; E.C. 188.8.131.52) is the plant enzyme thought to play a major role in sucrose biosynthesis. In photosynthetic and nonphotosynthetic tissues, SPS is regulated by… Expand
Membrane association of sucrose synthase: changes during the graviresponse and possible control by protein phosphorylation
Sucrose synthase (SuSy) plays an important role in sucrose degradation and occurs both as a soluble and as a membrane‐associated enzyme in higher plants. We show that membrane association can vary in… Expand
Phosphorylation of Serine-15 of Maize Leaf Sucrose Synthase (Occurrence in Vivo and Possible Regulatory Significance)
Experiments were conducted to determine whether sucrose synthase (SuSy) was phosphorylated in the elongation zone of maize (Zea mays L.) leaves. The approximately 90-kD subunit of SuSy was… Expand
Reversible light/dark modulation of spinach leaf nitrate reductase activity involves protein phosphorylation.
- J. Huber, S. Huber, W. Campbell, M. Redinbaugh
- Chemistry, Medicine
- Archives of biochemistry and biophysics
- 1 July 1992
Spinach (Spinacia oleracea L.) leaf nitrate reductase (NADH:NR;NADH:nitrate oxidoreductase, EC 184.108.40.206) activity was found to rapidly change during light/dark transitions. The most rapid and dramatic… Expand
Sucrose phosphate synthase and sucrose accumulation at low temperature.
The influence of growth temperature on the free sugar and sucrose phosphate synthase content and activity of spinach (Spinacia oleracea) leaf tissue was studied. When plants were grown at 25 degrees… Expand
The inhibitor protein of phosphorylated nitrate reductase from spinach (Spinacia oleracea) leaves is a 14‐3‐3 protein
The inhibitor protein (IP) that inactivates spinach leaf NADH:nitrate reductase (NR) has been identified for the first time as a member of the eukaryotic 14‐3‐3 protein family based on three lines of… Expand
Role of sucrose-phosphate synthase in sucrose metabolism in leaves.
Sucrose is formed in the cytoplasm of leaf cells from triose phosphates exported from the chloroplast. Flux control is shared among key enzymes of the pathway, one of which is sucrose-phosphate… Expand
Increased protein carbonylation in leaves of Arabidopsis and soybean in response to elevated [CO2]
While exposure of C3 plants to elevated [CO2] would be expected to reduce production of reactive oxygen species (ROS) in leaves because of reduced photorespiratory metabolism, results obtained in the… Expand
Biological significance of divalent metal ion binding to 14-3-3 proteins in relationship to nitrate reductase inactivation.
In this report we address two questions regarding the regulation of phosphorylated nitrate reductase (pNR; EC 220.127.116.11) by 14-3-3 proteins. The first concerns the requirement for millimolar… Expand
Protein phosphorylation as a mechanism for regulation of spinach leaf sucrose-phosphate synthase activity.
Studies were conducted to determine whether protein phosphorylation may be a mechanism for regulation of spinach (Spinacia oleracea L.) leaf sucrose-phosphate synthase (SPS), shown previously to be… Expand