Specific Features of Plant CK2

Riera, Marta; Vélez‐Bermúdez, Isabel Cristina; Legnaioli, Tommaso; Pagès, Montserrat

doi:10.1002/9781118482490.ch9

Cited by 5 publications

(3 citation statements)

References 100 publications

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“…Although the CK2 holoenzyme is a tetramer composed of two a and two b subunits, it has been proposed that each of the two types of subunits could also have independent functions (Filhol et al, 2004). Individual CK2a and CK2b are nuclear localized proteins (with the exception of a chloroplastic CK2a4) (Salinas et al, 2006;Riera et al, 2013). The heterotetrameric holoenzyme forms aggregates in both the nucleus (nuclear speckles) and cytoplasm (Riera et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

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

et al. 2015

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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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Section: Discussionmentioning

confidence: 99%

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

et al. 2015

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“…Among all kinase, CK2 is unique because it can use either ATP or GTP as phosphoryl donors ( Niefind et al, 1999 ). CK2 is involved in plant growth and development, light-regulated gene expression, hormone responses, cell-cycle regulation, flowering time, DNA repair or responses to abiotic stress and biotic stresses in plants ( Lee et al, 1999 ; Riera et al, 2004 ; Portolés and Más, 2007 ; Moreno-Romero et al, 2008 ; Riera et al, 2013 ; Mulekar and Huq, 2014 ; Vilela et al, 2015 ). In the case of abiotic stresses, CK2 acts as an ABA regulator because ck2α mutants are hypersensitive to ABA concerning seed germination, cotyledon greening, and stomatal opening ( Mulekar et al, 2012 ; Wang et al, 2014 ).…”

Section: Aba Signalingmentioning

confidence: 99%

Abscisic Acid and Abiotic Stress Tolerance in Crop Plants

2016

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Abiotic stress is a primary threat to fulfill the demand of agricultural production to feed the world in coming decades. Plants reduce growth and development process during stress conditions, which ultimately affect the yield. In stress conditions, plants develop various stress mechanism to face the magnitude of stress challenges, although that is not enough to protect them. Therefore, many strategies have been used to produce abiotic stress tolerance crop plants, among them, abscisic acid (ABA) phytohormone engineering could be one of the methods of choice. ABA is an isoprenoid phytohormone, which regulates various physiological processes ranging from stomatal opening to protein storage and provides adaptation to many stresses like drought, salt, and cold stresses. ABA is also called an important messenger that acts as the signaling mediator for regulating the adaptive response of plants to different environmental stress conditions. In this review, we will discuss the role of ABA in response to abiotic stress at the molecular level and ABA signaling. The review also deals with the effect of ABA in respect to gene expression.

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“…Unlike animals, in plants both kinds of subunits are encoded by multigenic families ( Velez-Bermudez et al, 2011 ). Plant CK2 is a pleiotropic enzyme involved in relevant processes such as plant growth and development, light-regulated gene expression, circadian rhythm, hormone responses, cell-cycle regulation, flowering time, DNA repair or responses to biotic and abiotic stress, among others ( Riera et al, 2013 ; Mulekar and Huq, 2014 ).…”

Section: Introductionmentioning

confidence: 99%

Emerging roles of protein kinase CK2 in abscisic acid signaling

2015

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The 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.

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Specific Features of Plant CK2

Cited by 5 publications

References 100 publications

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

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

Abscisic Acid and Abiotic Stress Tolerance in Crop Plants

Emerging roles of protein kinase CK2 in abscisic acid signaling

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