Comparative phosphoproteomic analysis of raf36raf22 in Arabidopsis
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ABSTRACT: A phythormone abscisic acid (ABA) has a major role in abiotic stress responses in plants, and subclass III SNF1-related protein kinase 2 (SnRK2) mediates ABA signaling. In this study, we identified Raf36, a group C Raf-like protein kinase in Arabidopsis, as an interacting protein with SnRK2. A series of reverse genetic and biochemical analyses revealed that Raf36 negatively regulates ABA responses and is directly phosphorylated by SnRK2s. In addition, we found that Raf22, another C-type Raf-like kinase, functions partially redundantly with Raf36 to regulate ABA responses. Comparative phosphoproteomic analysis using Arabidopsis wild-type and raf22raf36-1 plants indicate proteins that are phosphorylated downstream of Raf36 and Raf22 in planta. Together, these results reveal a novel subsection of ABA-responsive phosphosignaling pathways branching from SnRK2.
ORGANISM(S): Arabidopsis Thaliana (mouse-ear Cress)
SUBMITTER: Shinnosuke Ishikawa
PROVIDER: PXD016894 | JPOST Repository | Tue Dec 22 00:00:00 GMT 2020
REPOSITORIES: jPOST
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