The Function of Sucrose Nonfermenting-1 Related Protein Kinases in Stress Signaling
Jinfei Zhang1,2, Xia Li2*, Yinfeng Xie1
1College of Biology and Environment, Nanjing Forestry University, Nanjing 210037, China 2Nanjing Branch of China National Center for Rice Improvement, Jiangsu High Quality Rice Engineering Technology Research Center, Institute of Food Crops, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
The plant SnRK2s is involved in the main ABA pathway (motified from Axel et al., 2016)(A) In the absence of ABA, the ABA receptors are inactivated and PP2C (Protein Phosphatase 2C) proteins inhibit SnRK2s; (B) In the presence of ABA, the ABA receptors PYR/PIL/RCAR proteins bind to ABA and in turn inhibit PP2C activity, allowing the activation of SnRK2s through autophosphorylation. Activated SnRK2s then phosphorylate their downstream transcription factors, which modulate ABA responding gene expression. They can also phosphorylate other proteins, such as AKT1 and NADPH oxidases. Together, these events lead to the establishment of the ABA response."
Different functions of SnRKs gene family of Arabidopsis"