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Plant Sci. 2019 Apr;281:102-112. doi: 10.1016/j.plantsci.2019.01.021. Epub 2019 Jan 24.

Novel interactions of Selenium Binding Protein family with the PICOT containing proteins AtGRXS14 and AtGRXS16 in Arabidopsis thaliana.

Author information

1
Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece.
2
Institute of Biology, Leiden University, Leiden, the Netherlands.
3
Department of Cell Biology and Biophysics, Faculty of Biology, National & Kapodistrian University, 15784, Athens, Greece.
4
Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece. Electronic address: aroussis@biol.uoa.gr.

Abstract

During abiotic stress the primary symptom of phytotoxicity can be ROS production which is strictly regulated by ROS scavenging pathways involving enzymatic and non-enzymatic antioxidants. Furthermore, ROS are well-described secondary messengers of cellular processes, while during the course of evolution, plants have accomplished high degree of control over ROS and used them as signalling molecules. Glutaredoxins (GRXs) are small and ubiquitous glutathione (GSH) -or thioredoxin reductase (TR)-dependent oxidoreductases belonging to the thioredoxin (TRX) superfamily which are conserved in most eukaryotes and prokaryotes. In Arabidopsis thaliana GRXs are subdivided into four classes playing a central role in oxidative stress responses and physiological functions. In this work, we describe a novel interaction of AtGRXS14 with the Selenium Binding Protein 1 (AtSBP1), a protein proposed to be integrated in a regulatory network that senses alterations in cellular redox state and acts towards its restoration. We further show that SBP protein family interacts with AtGRXS16 that also contains a PICOT domain, like AtGRXS14.

KEYWORDS:

AtGRXS14; AtGRXS16; SBP1; Selenium Binding Protein

PMID:
30824043
DOI:
10.1016/j.plantsci.2019.01.021
[Indexed for MEDLINE]

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