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RESEARCH PRODUCT
The essential role of the phosphorylated pathway of serine biosynthesis inArabidopsis
Sanja RojeWalid ToujaniJuan SeguraMaría Flores-torneroAlisdair R. FernieJesús Muñoz-bertomeuArmand D. AnomanRoc RosSara Rosa-téllezsubject
Male gametophyteShort CommunicationGreen Fluorescent ProteinsArabidopsisPlant ScienceBiologySerinechemistry.chemical_compoundBiosynthesisArabidopsisBIOQUIMICA Y BIOLOGIA MOLECULARSerineGlycolysisPhosphorylationchemistry.chemical_classificationArabidopsis ProteinsPhosphoserine phosphataseMetabolismPhosphorylated pathway of serine biosynthesisbiology.organism_classificationPhosphoric Monoester HydrolasesBiosynthetic PathwaysAmino acidRoot and embryo developmentBiochemistrychemistryMutationPhosphorylationPhosphoserine phosphatasedescription
[EN] In plants, 3 different pathways of serine biosynthesis have been described: the Glycolate pathway, which is associated with photorespiration, and 2 non-photorespiratory pathways, the Glycerate and the Phosphorylated pathways. The Phosphorylated Pathway of Serine Biosynthesis (PPSB) has been known since the 1950s, but has been studied relatively little, probably because it was considered of minor significance as compared with the Glycolate pathway. In the associated study1 , we described for the first time in plants the in vivo functional characterization of the PPSB, by targeting the phosphoserine phosphatase (PSP1), the last enzyme of the pathway. Following a gain—and loss-of-function approach in Arabidopsis, we provided genetic and molecular evidence for the essential role of PSP1 for embryo and pollen development, and for proper root growth. A metabolomics study indicated that the PPSB affects glycolysis, the Krebs cycle, and the biosynthesis of several amino acids, which suggests that this pathway is an important link connecting metabolism and development. The mechanisms underlying the essential functions of PSP1 are discussed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-11-01 | Plant Signaling & Behavior |