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Emerging roles of protein kinase CK2 in abscisic acid signaling

AuthorsVilela, Belmiro; Pagès, Montserrat ; Riera, Marta
Issue Date3-Nov-2015
PublisherFrontiers Media
CitationFrontiers in Plant Science 6: 966 (2015)
AbstractThe phytohormone abscisic acid (ABA) regulates many aspects of plant growth and development as well as responses to multiple stresses. Post-translational modifications such as phosphorylation or ubiquitination have pivotal roles in the regulation of ABA signaling. In addition to the positive regulator sucrose non-fermenting-1 related protein kinase 2 (SnRK2), the relevance of the role of other protein kinases, such as CK2, has been recently highlighted. We have recently established that CK2 phosphorylates the maize ortholog of open stomata 1 OST1, ZmOST1, suggesting a role of CK2 phosphorylation in the control of ZmOST1 protein degradation (Vilela et al., 2015). CK2 is a pleiotropic enzyme involved in multiple developmental and stress-responsive pathways. This review summarizes recent advances that taken together suggest a prominent role of protein kinase CK2 in ABA signaling and related processes.
Publisher version (URL)http://dx.doi.org/10.3389/fpls.2015.00966
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