The Low Molecular Weight Protein PsaI Stabilizes the Light-Harvesting Complex II Docking Site of Photosystem I1
The Low Molecular Weight Protein PsaI Stabilizes the Light-Harvesting Complex II Docking Site of Photosystem I1
复制标题
低分子量蛋白 PsaI 稳定光系统 I1 的光捕获复合物 II 对接位点
DOI:
10.1104/pp.16.00647
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发表时间:
2016
期刊:
影响因子:
7.4
通讯作者:
Meurer J
中科院分区:
文献类型:
--
作者:
Plöchinger M;Torabi S;Rantala M;Tikkanen M;Suorsa M;Jensen PE;Aro EM;Meurer J
PsaI represents one of three low molecular weight peptides of PSI. Targeted inactivation of the plastidPsaIgene inNicotiana tabacumhas no measurable effect on photosynthetic electron transport around PSI or on accumulation of proteins involved in photosynthesis. Instead, the lack of PsaI destabilizes the association of PsaL and PsaH to PSI, both forming the light-harvesting complex (LHC)II docking site of PSI. These alterations at the LHCII binding site surprisingly did not prevent state transition but led to an increased incidence of PSI-LHCII complexes, coinciding with an elevated phosphorylation level of the LHCII under normal growth light conditions. Remarkably, LHCII was rapidly phosphorylated in ƊpsaIin darkness even after illumination with far-red light. We found that this dark phosphorylation also occurs in previously described mutants impaired in PSI function or state transition. A prompt shift of the plastoquinone (PQ) pool into a more reduced redox state in the dark caused an enhanced LHCII phosphorylation in ƊpsaI. Since the redox status of the PQ pool is functionally connected to a series of physiological, biochemical, and gene expression reactions, we propose that the shift of mutant plants into state 2 in darkness represents a compensatory and/or protective metabolic mechanism. This involves an increased reduction and/or reduced oxidation of the PQ pool, presumably to sustain a balanced excitation of both photosystems upon the onset of light.
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DOI:
--
发表时间:
2010
期刊:
Plant Signalling & Behavior
影响因子:
--
作者:
P. Pesaresi;Alexander P. Hertle;M. Pribil;A. Schneider;T. Kleine;D. Leister
通讯作者:
D. Leister
影响因子:
11.6
作者:
Meurer, J;Lezhneva, L;Oelmüller, R
通讯作者:
Oelmüller, R
DOI:
10.1016/j.plaphy.2015.10.009
发表时间:
2015-12
期刊:
Plant physiology and biochemistry : PPB
影响因子:
--
作者:
Verdiana Steccanella;M. Hansson;P. Jensen
通讯作者:
Verdiana Steccanella;M. Hansson;P. Jensen
DOI:
10.1111/tpj.12297
发表时间:
2013-10
期刊:
The Plant journal : for cell and molecular biology
影响因子:
--
作者:
Leoni C;Pietrzykowska M;Kiss AZ;Suorsa M;Ceci LR;Aro EM;Jansson S
通讯作者:
Jansson S
DOI:
--
发表时间:
1995
期刊:
影响因子:
--
作者:
Hitoshi Nakamoto
通讯作者:
Hitoshi Nakamoto