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  • Title: Fe deficiency induces phosphorylation and translocation of Lhcb1 in barley thylakoid membranes.
    Author: Saito A, Shimizu M, Nakamura H, Maeno S, Katase R, Miwa E, Higuchi K, Sonoike K.
    Journal: FEBS Lett; 2014 Jun 05; 588(12):2042-8. PubMed ID: 24815689.
    Abstract:
    HvLhcb1 a major light-harvesting chlorophyll a/b-binding protein in barley, is a critical player in sustainable growth under Fe deficiency. Here, we demonstrate that Fe deficiency induces phosphorylation of HvLhcb1 proteins leading to their migration from grana stacks to stroma thylakoid membranes. HvLhcb1 remained phosphorylated even in the dark and apparently independently of state transition, which represents a mechanism for short-term acclimation. Our data suggest that the constitutive phosphorylation-triggered translocation of HvLhcb1 under Fe deficiency contributes to optimization of the excitation balance between photosystem II and photosystem I, the latter of which is a main target of Fe deficiency.
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