NADPH‐dependent thioredoxin reductase and 2‐Cys peroxiredoxins are needed for the protection of Mg–protoporphyrin monomethyl ester cyclase
Copyright policy )NADPH‐dependent thioredoxin reductase and 2‐Cys peroxiredoxins are needed for the protection of Mg–protoporphyrin monomethyl ester cyclase
The chloroplast‐localized NADPH‐dependent thioredoxin reductase (NTRC) has been found to be able to reduce hydrogen peroxide scavenging 2‐Cys peroxiredoxins. We show that the Arabidopsis ntrc mutant is perturbed in chlorophyll biosynthesis and accumulate intermediates preceding protochlorophyllide formation. A specific involvement of NTRC during biosynthesis of protochlorophyllide is indicated from in vitro aerobic cyclase assays in which the conversion of Mg–protoporhyrin monomethyl ester into protochlorophyllide is stimulated by addition of the NTRC/2‐Cys peroxiredoxin system. These findings support the hypothesis that this NADPH‐dependent hydrogen peroxide scavenging system is particularly important during periods with limited reducing power from photosynthesis, e.g. under chloroplast biogenesis.
- Umeå Plant Science Centre Sweden
- University of Copenhagen Denmark
- Bielefeld University Germany
- University of Copenhagen (UCPH) Denmark
- University of copenhaguen Denmark
Chlorophyll, aerobic cyclase, Thioredoxin-Disulfide Reductase, Arabidopsis thaliana, Arabidopsis Proteins, Arabidopsis, Peroxiredoxins, biosynthetic pathway, Chloroplast biogenesis, Aerobiosis, co-expression, Aerobic cyclase, Biosynthetic pathway, chloroplast biogenesis, Oxygenases, Gene co-expression, gene, Hydrogen peroxide scavenging, hydrogen peroxide scavenging
Chlorophyll, aerobic cyclase, Thioredoxin-Disulfide Reductase, Arabidopsis thaliana, Arabidopsis Proteins, Arabidopsis, Peroxiredoxins, biosynthetic pathway, Chloroplast biogenesis, Aerobiosis, co-expression, Aerobic cyclase, Biosynthetic pathway, chloroplast biogenesis, Oxygenases, Gene co-expression, gene, Hydrogen peroxide scavenging, hydrogen peroxide scavenging
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