SCF E3 ligase PP2-B11 plays a positive role in response to salt stress in Arabidopsis.
Skp1-Cullin-F-box (SCF) E3 ligases are essential to the post-translational regulation of many important factors involved in cellular signal transduction. In this study, we identified an F-box protein from Arabidopsis thaliana, AtPP2-B11, which was remarkably induced with increased duration of salt treatment in terms of both transcript and protein levels. Transgenic Arabidopsis plants overexpressing AtPP2-B11 exhibited obvious tolerance to high salinity, whereas the RNA interference line was more sensitive to salt stress than wild-type plants. Isobaric tag for relative and absolute quantification analysis revealed that 4311 differentially expressed proteins were regulated by AtPP2-B11 under salt stress. AtPP2-B11 could upregulate the expression of annexin1 (AnnAt1) and function as a molecular link between salt stress and reactive oxygen species accumulation in Arabidopsis. 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.
['Jia|Fengjuan|F|', 'Wang|Chunyan|C|', 'Huang|Jinguang|J|', 'Yang|Guodong|G|', 'Wu|Changai|C|', 'Zheng|Chengchao|C|']
D017360:Arabidopsis D029681:Arabidopsis Proteins D018506:Gene Expression Regulation, Plant D030821:Plants, Genetically Modified D034622:RNA Interference D044843:SKP Cullin F-Box Protein Ligases D055049:Salt Tolerance D012965:Sodium Chloride
ligases AnnAt1 E3 AtPP2-B11 Na+ homeostasis ROS.