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SCF E3 ligase PP2-B11 plays a positive role in response to salt stress in Arabidopsis.

Jia F, Wang C, Huang J, Yang G, Wu C, Zheng C - J. Exp. Bot. (2015)

Bottom Line: Isobaric tag for relative and absolute quantification analysis revealed that 4311 differentially expressed proteins were regulated by AtPP2-B11 under salt stress.Moreover, AtPP2-B11 influenced the expression of Na(+) homeostasis genes under salt stress, and the AtPP2-B11 overexpressing lines exhibited lower Na(+) accumulation.These results suggest that AtPP2-B11 functions as a positive regulator in response to salt stress in Arabidopsis.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong 271018, PR China.

No MeSH data available.


Model of AtPP2-B11 involvement in the salt stress response. The SCF E3 ligase AtPP2-B11 was remarkably induced at both the transcriptional and translational levels when treated with salt stress. Overexpressing AtPP2-B11 upregulated the expression of annexins, repressed ROS accumulation, and affected Na+ homeostasis under salt stress conditions to elevated salt stress tolerance. In addition, the protein stability of AtPP2-B11 was protected by AtLEA14 under salt stress, and the stable AtPP2-B11 degraded unknown transcriptional repressors, which elevated the expression of salt-responsive genes and subsequent stress tolerance. (This figure is available in colour at JXB online.)
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Figure 9: Model of AtPP2-B11 involvement in the salt stress response. The SCF E3 ligase AtPP2-B11 was remarkably induced at both the transcriptional and translational levels when treated with salt stress. Overexpressing AtPP2-B11 upregulated the expression of annexins, repressed ROS accumulation, and affected Na+ homeostasis under salt stress conditions to elevated salt stress tolerance. In addition, the protein stability of AtPP2-B11 was protected by AtLEA14 under salt stress, and the stable AtPP2-B11 degraded unknown transcriptional repressors, which elevated the expression of salt-responsive genes and subsequent stress tolerance. (This figure is available in colour at JXB online.)

Mentions: Taken together, a model was generated according to our results (Fig. 9). AtPP2-B11, an SCF E3 ligase, was remarkably induced at both the transcriptional and translational levels when treated with salt stress. Overexpressing AtPP2-B11 upregulated the expression of annexins, repressed ROS accumulation, and affected Na+ homeostasis under salt stress conditions to produce elevated salt stress tolerance. In addition, the protein stability of AtPP2-B11 was protected by AtLEA14 under salt stress. However, identification of the substrates of AtPP2-B11 under salt stress remains to be determined, and further experiments should be conducted to explain the detailed regulatory mechanism between AtPP2-B11 and salt stress.


SCF E3 ligase PP2-B11 plays a positive role in response to salt stress in Arabidopsis.

Jia F, Wang C, Huang J, Yang G, Wu C, Zheng C - J. Exp. Bot. (2015)

Model of AtPP2-B11 involvement in the salt stress response. The SCF E3 ligase AtPP2-B11 was remarkably induced at both the transcriptional and translational levels when treated with salt stress. Overexpressing AtPP2-B11 upregulated the expression of annexins, repressed ROS accumulation, and affected Na+ homeostasis under salt stress conditions to elevated salt stress tolerance. In addition, the protein stability of AtPP2-B11 was protected by AtLEA14 under salt stress, and the stable AtPP2-B11 degraded unknown transcriptional repressors, which elevated the expression of salt-responsive genes and subsequent stress tolerance. (This figure is available in colour at JXB online.)
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4507775&req=5

Figure 9: Model of AtPP2-B11 involvement in the salt stress response. The SCF E3 ligase AtPP2-B11 was remarkably induced at both the transcriptional and translational levels when treated with salt stress. Overexpressing AtPP2-B11 upregulated the expression of annexins, repressed ROS accumulation, and affected Na+ homeostasis under salt stress conditions to elevated salt stress tolerance. In addition, the protein stability of AtPP2-B11 was protected by AtLEA14 under salt stress, and the stable AtPP2-B11 degraded unknown transcriptional repressors, which elevated the expression of salt-responsive genes and subsequent stress tolerance. (This figure is available in colour at JXB online.)
Mentions: Taken together, a model was generated according to our results (Fig. 9). AtPP2-B11, an SCF E3 ligase, was remarkably induced at both the transcriptional and translational levels when treated with salt stress. Overexpressing AtPP2-B11 upregulated the expression of annexins, repressed ROS accumulation, and affected Na+ homeostasis under salt stress conditions to produce elevated salt stress tolerance. In addition, the protein stability of AtPP2-B11 was protected by AtLEA14 under salt stress. However, identification of the substrates of AtPP2-B11 under salt stress remains to be determined, and further experiments should be conducted to explain the detailed regulatory mechanism between AtPP2-B11 and salt stress.

Bottom Line: Isobaric tag for relative and absolute quantification analysis revealed that 4311 differentially expressed proteins were regulated by AtPP2-B11 under salt stress.Moreover, AtPP2-B11 influenced the expression of Na(+) homeostasis genes under salt stress, and the AtPP2-B11 overexpressing lines exhibited lower Na(+) accumulation.These results suggest that AtPP2-B11 functions as a positive regulator in response to salt stress in Arabidopsis.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong 271018, PR China.

No MeSH data available.