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Fe deficiency induces phosphorylation and translocation of Lhcb1 in barley thylakoid membranes
Author(s) -
Saito Akihiro,
Shimizu Mizuho,
Nakamura Hitomi,
Maeno Shoko,
Katase Riko,
Miwa Eitaro,
Higuchi Kyoko,
Sonoike Kintake
Publication year - 2014
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/j.febslet.2014.04.031
Subject(s) - thylakoid , phosphorylation , photosystem ii , chromosomal translocation , biophysics , microbiology and biotechnology , chemistry , chloroplast , photosystem , stroma , light harvesting complexes of green plants , biology , biochemistry , photosynthesis , gene , immunology , immunohistochemistry
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.