The Arabidopsis sex1 mutant is defective in the R1 protein, a general regulator of starch degradation in plants, and not in the chloroplast hexose transporter.
It is proposed that the SEX1 protein (R1) functions as an overall regulator of starch mobilization by controlling the phosphate content of starch.
The Phosphoenolpyruvate/Phosphate Translocator Is Required for Phenolic Metabolism, Palisade Cell Development, and Plastid-Dependent Nuclear Gene Expression
- S. Streatfield, A. Weber, J. Chory
- Biology, Environmental ScienceThe Plant Cell
- 1 September 1999
It is determined that CUE1 encodes the plastid inner envelope phosphoenolpyruvate/phosphate translocator (PPT) and amino acid residues that are critical for translocators function are defined and rescued by feeding aromatic amino acids.
The regulation and control of photorespiration
- R. Leegood, P. Lea, M. Adcock, R. Häusler
- Biology
- 1 September 1995
A new class of plastidic phosphate translocators: a putative link between primary and secondary metabolism by the phosphoenolpyruvate/phosphate antiporter.
- K. Fischer, B. Kammerer, U. Flügge
- BiologyThe Plant Cell
- 1 March 1997
It is proposed that plastids contain various phosphate translocators with overlapping substrate specificities to ensure an efficient supply of plastidids with a single substrate, even in the presence of other phosphorylated metabolites.
An Arabidopsis thaliana knock-out mutant of the chloroplast triose phosphate/phosphate translocator is severely compromised only when starch synthesis, but not starch mobilisation is abolished.
- A. Schneider, R. Häusler, U. Flügge
- Environmental Science, BiologyThe Plant Journal
- 1 December 2002
Diurnal variations in the contents of starch, soluble sugars and phosphorylated intermediates combined with 14CO2 labelling studies showed, that the lack of TP export for cytosolic sucrose biosynthesis was almost fully compensated by both continuous accelerated starch turnover and export of neutral sugars from the stroma throughout the day.
Overexpression of C4-cycle enzymes in transgenic C3 plants: a biotechnological approach to improve C3-photosynthesis
- R. Häusler, H. Hirsch, F. Kreuzaler, C. Peterhänsel
- Environmental Science
- 1 April 2002
This review will focus on biochemical and physiological consequences of the overexpression of C4-cycle genes in C3 plants, and the pitfalls encountered when C3 metabolism is perturbed by the overexpressing of individual C4 genes will also be discussed.
The Arabidopsis sex1 Mutant Is Defective in the R1 Protein, a General Regulator of Starch Degradation in Plants, and Not in the Chloroplast Hexose Transporter
- Tien-Shin Yu, H. Kofler, A. Weber
- BiologyThe Plant Cell Online
- 1 August 2001
It is proposed that the SEX1 protein (R1) functions as an overall regulator of starch mobilization by controlling the phosphate content of starch.
The role of plastidial glucose-6-phosphate/phosphate translocators in vegetative tissues of Arabidopsis thaliana mutants impaired in starch biosynthesis.
- H. Kunz, R. Häusler, A. Schneider
- Biology, Environmental SciencePlant biology
- 5 May 2010
The abundance of GPT2 mRNA correlates with increased levels of soluble sugars, in particular of glucose in leaves, suggesting induction by the sugar-sensing pathway, and the possible function of G PT2 in starch-free mutants is discussed in the background of carbon requirement in leaves during the light-dark cycle.
Molecular and functional characterization of the plastid‐localized Phosphoenolpyruvate enolase (ENO1) from Arabidopsis thaliana
- V. Prabhakar, Tanja Löttgert, T. Gigolashvili, K. Bell, U. Flügge, R. Häusler
- Environmental Science, BiologyFEBS Letters
- 18 March 2009
Plastidic metabolite transporters and their physiological functions in the inducible crassulacean acid metabolism plant Mesembryanthemum crystallinum.
- R. Häusler, B. Baur, K. Fischer
- Environmental ScienceThe Plant Journal
- 1 November 2000
The transport activities of all three phosphate translocators and the transcript amounts of the pGlcT adapt to changing transport requirements in order to maintain high metabolic fluxes during the diurnal CAM cycle, suggesting a higher requirement for Glc6P import for starch synthesis than starch mobilization.
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