The High Light Response in Arabidopsis Requires the Calcium Sensor Protein CAS, a Target of STN7- and STN8-Mediated Phosphorylation.

ABSTRACT: Reversible phosphorylation of thylakoid proteins contributes to photoacclimation responses in photosynthetic organisms, enabling the fine-tuning of light harvesting under changing light conditions and promoting the onset of photoprotective processes. However, the precise functional role of many of the described phosphorylation events on thylakoid proteins remains elusive. The calcium sensor receptor protein (CAS) has previously been indicated as one of the targets of the state transition kinase 8 (STN8). Here we show that in Arabidopsis thaliana, CAS is also phosphorylated by the state transition kinase 7 (STN7), as well as by another, so-far unknown, Ca²⁺-dependent kinase. Phosphoproteomics analysis and in vitro phosphorylation assays on CAS variants identified th

SUBMITTER: Cutolo E 

PROVIDER: S-EPMC6682602 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature