Journal
PHOTOSYNTHESIS RESEARCH
Volume 79, Issue 3, Pages 295-304Publisher
SPRINGER
DOI: 10.1023/B:PRES.0000017165.55488.ca
Keywords
Arabidopsis; disulfide bridge; NADPH-dependent thioredoxin; redox potential; thioredoxin specificity
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Thioredoxins, by reducing disulfide bridges are one of the main participants that regulate cellular redox balance. In plants, the thioredoxin system is particularly complex. The most well-known thioredoxins are the chloroplastic ones, that participate in the regulation of enzymatic activities during the transition between light and dark phases. The mitochondrial system composed of NADPH-dependent thioredoxin reductase and type o thioredoxin has only recently been described. The type h thioredoxin group is better known. Yeast complementation experiments demonstrated that Arabidopsis thaliana thioredoxins h have divergent functions, at least in Saccharomyces cerevisiae. They have diverse affinities for different target proteins, most probably because of structural differences. However, plant thioredoxin h functions still have to be defined.
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