Casein Kinase 2 Negatively Regulates Abscisic Acid-Activated SnRK2s in the Core Abscisic Acid-Signaling Module

Molecular Plant
Belmiro VilelaMontserrat Pagès

Abstract

SnRK2 kinases, PP2C phosphatases and the PYR/PYL/RCAR receptors constitute the core abscisic acid (ABA) signaling module that is thought to contain all of the intrinsic properties to self-regulate the hormone signal output. Here we identify Casein Kinase (CK)2 as a novel negative regulator of SnRK2. CK2 phosphorylates a cluster of conserved serines at the ABA box of SnRK2, increasing its binding to PP2C and triggering protein degradation. Consequently, CK2 action has implications on SnRK2 protein levels, as well as kinase activity and its response to abiotic stimuli.

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Citations

Feb 24, 2016·Frontiers in Physiology·Kelly M BalmantSixue Chen
Nov 19, 2015·Frontiers in Plant Science·Belmiro VilelaMarta Riera
May 31, 2015·Plant Science : an International Journal of Experimental Plant Biology·Jidnyasa Jayant Mulekar, Enamul Huq
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Apr 12, 2019·Frontiers in Plant Science·Xiaohong Zhuang, Liwen Jiang
Jan 6, 2021·Journal of Integrative Plant Biology·Xuexue ChenZhizhong Gong
Apr 4, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Eleanor L AtkinsonDavid R Spring
Jun 20, 2021·The Plant Journal : for Cell and Molecular Biology·Chae Woo LimSung Chul Lee

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