The PPH1 phosphatase is specifically involved in LHCII dephosphorylation and state transitions in Arabidopsis.

ABSTRACT: The ability of plants to adapt to changing light conditions depends on a protein kinase network in the chloroplast that leads to the reversible phosphorylation of key proteins in the photosynthetic membrane. Phosphorylation regulates, in a process called state transition, a profound reorganization of the electron transfer chain and remodeling of the thylakoid membranes. Phosphorylation governs the association of the mobile part of the light-harvesting antenna LHCII with either photosystem I or photosystem II. Recent work has identified the redox-regulated protein kinase STN7 as a major actor in state transitions, but the nature of the corresponding phosphatases remained unknown. Here we identify a phosphatase of Arabidopsis thaliana, called PPH1, which is specifically required for the deph

SUBMITTER: Shapiguzov A 

PROVIDER: S-EPMC2842063 | biostudies-literature | 2010 Mar

REPOSITORIES: biostudies-literature