Transcriptional regulation of SOS1 by CycC1; 1-WRKY75 complex under salt stress.

SOS2 is a Ser/Thr protein kinase that phosphorylates and activates SOS1, a Na SP + sp /H SP + sp antiporter that facilitates Na SP + sp efflux from the cells. A salt-mediated increase in cytosolic calcium is perceived by the SOS3 EF-hand calcium-binding protein, leading to SOS2 activation. CycC1; 1 is a plant mediator protein complex subunit that influences gene transcription by acting as a bridge between transcription factors and RNA polymerase II (RNAP II) ([1]). [Extracted from the article]