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Dreyer, Anna ; Treffon, Patrick; Basiry, Daniel; Jozefowicz, Anna Maria; Matros, Andrea; Mock, Hans-Peter; Dietz, Karl-Josef: Function and Regulation of Chloroplast Peroxiredoxin IIE. In: Antioxidants. Vol.10 Issue 2. 2021
Content
Materials and Methods
Plant Material and Growth Conditions
Cloning
Heterologous Expression and Purification
Xylenol Orange Assay
NADPH-Dependent Peroxidase Activity Measurement
Hyperoxidation of PRX-IIE
S-Glutathionylation
2-Dimensional SDS-PAGE
Subcellular Localisation of PRX-IIE
Affinitiy Chromatography and Mass Spectrometry
Far Western Blot
Structural Modeling
Statistical Analysis
Results
PRX-IIE Is Localized to the Chloroplast Stroma
PRXIIE Detoxifies H2O2 Using the GRX System for Regeneration
CuOOH-and H2O2-Dependent Hyperoxidation
S-Glutathionylation of PRX-IIE Occurs at Cysp
Identification of PRX-IIE Interaction Partners
Discussion
Regeneration of Reduced PRX-IIE Limits Catalytic Turnover
Bulky Substrates Favour Hyperoxidation and Inhibition of PRX-IIE
Besides Hyperoxidation, Cys121 of PRX-IIE Is Subject to Multiple Posttranslational Modifications
PRX-IIE Binds to Target Proteins
14-3-3 Proteins as Binding Partner of PRX-IIE Open up New Perspectives
Hypothetical Outlook and Where to Go
Conclusions
References