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  • Title: Genome-wide analysis and transcriptional regulation of the typical and atypical thioredoxins in Arabidopsis thaliana.
    Author: Chibani K, Pucker B, Dietz KJ, Cavanagh A.
    Journal: FEBS Lett; 2021 Nov; 595(21):2715-2730. PubMed ID: 34561866.
    Abstract:
    Thioredoxins (TRXs), a large subclass of ubiquitous oxidoreductases, are involved in thiol redox regulation. Here, we performed a comprehensive analysis of TRXs in the Arabidopsis thaliana genome, revealing 41 genes encoding 18 typical and 23 atypical TRXs, and 6 genes encoding thioredoxin reductases (TRs). The high number of atypical TRXs indicates special functions in plants that mostly await elucidation. We identified an atypical class of thioredoxins called TRX-c in the genomes of photosynthetic eukaryotes. Localized to the chloroplast, TRX-c displays atypical CPLC, CHLC and CNLC motifs in the active sites. In silico analysis of the transcriptional regulations of TRXs revealed high expression of TRX-c in leaves and strong regulation under cold, osmotic, salinity and metal ion stresses.
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