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A mitogen-activated protein kinase cascade module, MKK3-MPK6 and MYC2, is involved in blue light-mediated seedling development in Arabidopsis

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Title A mitogen-activated protein kinase cascade module, MKK3-MPK6 and MYC2, is involved in blue light-mediated seedling development in Arabidopsis
 
Creator Sethi, Vishmita
Raghuram, Badmi
Sinha, Alok Krishna
Chattopadhyay, Sudip
 
Subject Arabidopsis
Blue Light-Mediated Seedling Development
Mitogen-activated protein kinase (MAPK)
MYC2
MKK3-MPK6
 
Description Accepted date: August 3, 2014
Mitogen-activated protein kinase (MAPK) pathways are involved in several signal transduction processes in eukaryotes. Light signal transduction pathways have been extensively studied in plants; however, the connection between MAPK and light signaling pathways is currently unknown. Here, we show that MKK3-MPK6 is activated by blue light in a MYC2-dependent manner. MPK6 physically interacts with and phosphorylates a basic helix-loop-helix transcription factor, MYC2, and is phosphorylated by a MAPK kinase, MKK3. Furthermore, MYC2 binds to the MPK6 promoter and regulates its expression in a feedback regulatory mechanism in blue light signaling. We present mutational and physiological studies that illustrate the function of the MKK3-MPK6-MYC2 module in Arabidopsis thaliana seedling development and provide a revised mechanistic view of photomorphogenesis.
This work was supported by a research grant of the Department of
Science and Technology, Government of India, to A.K.S. and S.C. V.S. is
a recipient of a fellowship from the Council of Scientific and Industrial
Research, Government of India, while B.R. is a recipient of fellowship
from Department of Biotechnology, Government of India.
 
Date 2015-12-23T11:14:17Z
2015-12-23T11:14:17Z
2014
 
Type Article
 
Identifier Plant Cell, 26(8): 3343-3357
1532-298X
http://172.16.0.77:8080/jspui/handle/123456789/455
http://www.plantcell.org/content/26/8/3343.long
10.1105/tpc.114.128702
 
Language en_US
 
Publisher American Society of Plant Biologists