Redox state-dependent modulation of plant SnRK1 kinase activity differs from AMPK regulation in animals.

ABSTRACT: The evolutionarily highly conserved SNF1-related protein kinase (SnRK1) protein kinase is a metabolic master regulator in plants, balancing the critical energy consumption between growth- and stress response-related metabolic pathways. While the regulation of the mammalian [AMP-activated protein kinase (AMPK)] and yeast (SNF1) orthologues of SnRK1 is well-characterised, the regulation of SnRK1 kinase activity in plants is still an open question. Here we report that the activity and T-loop phosphorylation of AKIN10, the kinase subunit of the SnRK1 complex, is regulated by the redox status. Although this regulation is dependent on a conserved cysteine residue, the underlying mechanism is different to the redox regulation of animal AMPK and has functional implications for the regulation of th

SUBMITTER: Wurzinger B 

PROVIDER: S-EPMC5698759 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature