Regulation of Arabidopsis MAPKKK18 by ABI1 and SnRK2, components of the ABA signaling pathway

The plant hormone abscisic acid (ABA), a key regulator in many crucial developmental and physiological processes, recruits diverse components into precisely regulated signaling network. We recently discovered that MAPKKK18, an ABA-activated kinase, is regulated by the protein phosphatase type 2C (PP...

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Bibliographic Details
Published in:Plant signaling & behavior 2016-01, Vol.11 (4), p.e1139277-e1139277
Main Authors: Tajdel, Małgorzata, Mituła, Filip, Ludwików, Agnieszka
Format: Article
Language:English
Subjects:
ABA signaling
ABI1
abscisic acid
Abscisic Acid - metabolism
Addendum
Arabidopsis
Arabidopsis - metabolism
Arabidopsis Proteins - metabolism
Arabidopsis thaliana
enzyme activity
MAP kinase cascade
MAP Kinase Kinase Kinases - metabolism
MAPKKK18
mitogen-activated protein kinase kinase kinase
Phosphoprotein Phosphatases - metabolism
phosphoric monoester hydrolases
PP2C
Protein Binding
protein metabolism
Protein-Serine-Threonine Kinases - metabolism
Signal Transduction
SnRK2
UPS
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Summary:The plant hormone abscisic acid (ABA), a key regulator in many crucial developmental and physiological processes, recruits diverse components into precisely regulated signaling network. We recently discovered that MAPKKK18, an ABA-activated kinase, is regulated by the protein phosphatase type 2C (PP2C) ABI1 and the kinase SnRK2.6, both components of the ABA core signaling pathway. ABI1 acts to inhibit MAPKKK18 kinase activity, but also affects MAPKKK18 protein turnover via the ubiquitin-proteasome pathway. SnRK2.6 kinase also seems to be important for the regulation of MAPKKK18 function. In this review we summarize the mechanisms that are exclusively involved in MAPKKK18 kinase regulation and that ensure specificity in its activation.
ISSN:1559-2316
1559-2324
1559-2324
DOI:10.1080/15592324.2016.1139277