Protein phosphorylation differs significantly among ontogenetic phases in Malus seedlings

文献类型: 外文期刊

第一作者: Wang, Yan

作者: Wang, Yan;Wang, Yi;Han, Zhen Hai;Zhang, Xin Zhong;Zhao, Yong Bo;Chen, Dong Mei

作者机构:

关键词: Apple;Vegetative phase change;Floral transition;Phosphorylated proteomics

期刊名称:PROTEOME SCIENCE ( 影响因子:2.48; 五年影响因子:2.619 )

ISSN: 1477-5956

年卷期: 2014 年 12 卷

页码:

收录情况: SCI

摘要: Background: Although protein phosphorylation is an important post-translational modification affecting protein function and metabolism, dynamic changes in this process during ontogenesis remain unexplored in woody angiosperms. Methods: Phosphorylated proteins from leaves of three apple seedlings at juvenile, adult vegetative and reproductive stages were extracted and subjected to alkaline phosphatase pre-treatment. After separating the proteins by two-dimensional gel electrophoresis and phosphoprotein-specific Pro-Q Diamond staining, differentially expressed phosphoproteins were identified by MALDI-TOF-TOF mass spectrometry. Results: A total of 107 phosphorylated protein spots on nine gels (three ontogenetic phases x three seedlings) were identified by MALDI-TOF-TOF mass spectrometry. The 55 spots of ribulose-1, 5-bisphosphate carboxylase/oxygenase (Rubisco) large-chain fragments varied significantly in protein abundance and degree of phosphorylation among ontogenetic phases. Abundances of the 27 spots corresponding to Rubisco activase declined between juvenile and reproductive phases. More extensively, phosphorylated beta-tubulin chain spots with lower isoelectric points were most abundant during juvenile and adult vegetative phases. Conclusions: Protein phosphorylation varied significantly during vegetative phase change and floral transition in apple seedlings. Most of the observed changes were consistent among seedlings and between hybrid populations.

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