Circadian regulation of chloroplastic f and m thioredoxins through control of the CCA1 transcription factor.

ABSTRACT: Chloroplastic thioredoxins f and m (TRX f and TRX m) mediate light regulation of carbon metabolism through the activation of Calvin cycle enzymes. The role of TRX f and m in the activation of Calvin cycle enzymes is best known among the TRX family. However, the discoveries of new potential targets extend the functions of chloroplastic TRXs to other processes in non-photosynthetic tissues. As occurs with numerous chloroplast proteins, their expression comes under light regulation. Here, the focus is on the light regulation of TRX f and TRX m in pea and Arabidopsis during the day/night cycle that is maintained during the subjective night. In pea (Pisum sativum), TRX f and TRX m1 expression is shown to be governed by a circadian oscillation exerted at both the transcriptional and protein leve

SUBMITTER: Barajas-Lopez Jde D 

PROVIDER: S-EPMC3060684 | biostudies-literature | 2011 Mar

REPOSITORIES: biostudies-literature