The blue light-dependent phosphorylation of the CCE domain determines the photosensitivity of Arabidopsis CRY2.
The blue light-dependent phosphorylation of the CCE domain determines the photosensitivity of Arabidopsis CRY2.
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DOI:
10.1016/j.molp.2015.03.005
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发表时间:
2015-04
期刊:
影响因子:
27.5
通讯作者:
Lin C
中科院分区:
文献类型:
--
作者:
Wang Q;Barshop WD;Bian M;Vashisht AA;He R;Yu X;Liu B;Nguyen P;Liu X;Zhao X;Wohlschlegel JA;Lin C
Arabidopsis cryptochrome 2 (CRY2) is a blue light receptor that mediates light inhibition of hypocotyl elongation and long-day promotion of floral initiation. CRY2 is known to undergo blue light-dependent phosphorylation, which is believed to serve regulatory roles in the function of CRY2. We report here a biochemical and genetics study of CRY2 phosphorylation. Using mass spectrometry analysis, we identified at least three serine residues in the CCE domain of CRY2 (S588, S599, and S605) that undergo blue light-dependent phosphorylation in Arabidopsis seedlings. A study of serine-substitution mutations of the CCE domain of CRY2 demonstrates that CRY2 contains two types of phosphorylation in the CCE domain, one in the serine cluster that cause electrophoretic mobility upshift and the other outside of the serine cluster that do not seem to cause mobility upshift. We showed that mutations in the serine residues within and outside of the serine cluster diminished blue light-dependent CRY2 phosphorylation, degradation, and physiological activities. These results support the hypothesis that blue light-dependent phosphorylation of the CCE domain determines the photosensitivity of Arabidopsis CRY2. This study identified, for the first time, light-dependent phosphorylation sites of a cryptochrome protein purified from plants. Using the transgenic approach, it also demonstrated a number of interesting biochemical and functional features of the blue light-dependent phosphorylation of a plant cryptochrome photoreceptor.
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影响因子:
4.5
作者:
Liu Y;Li X;Li K;Liu H;Lin C
通讯作者:
Lin C
DOI:
10.1074/mcp.m111.011015
发表时间:
2011-09
期刊:
Molecular & cellular proteomics : MCP
影响因子:
--
作者:
Michalski A;Damoc E;Hauschild JP;Lange O;Wieghaus A;Makarov A;Nagaraj N;Cox J;Mann M;Horning S
通讯作者:
Horning S
DOI:
10.1073/pnas.95.5.2686
发表时间:
1998-03-03
影响因子:
11.1
作者:
Lin, CT;Yang, HY;Cashmore, AR
通讯作者:
Cashmore, AR
影响因子:
56.9
作者:
Liu, Hongtao;Yu, Xuhong;Lin, Chentao
通讯作者:
Lin, Chentao
影响因子:
5.3
作者:
Chaves, I;Yagita, K;Tamanini, F
通讯作者:
Tamanini, F