The SAM kinase pathway: An integrated circuit for stress signaling in plants |
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Authors: | Irute Meskiene Wilco Ligterink Laszlo Bögre Claudia Jonak Stefan Kiegerl Judit Balog Staffan Eklöf Gustav Ammerer Heribert Hirt |
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Institution: | (1) Institute of Microbiology and Genetics, Vienna Biocenter, Dr. Bohrgasse 9, A-1030 Vienna, Austria;(2) Institute of Biochemistry and Molecular Cell Biology, Vienna Biocenter, Dr. Bohrgasse 9, A-1030 Vienna, Austria |
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Abstract: | Mitogen-activated protein (MAP) kinases are universal transducers of extracellular signals in all eukaryotes. Multiple MAPK
pathways exist in each organism that are differentially activated by a variety of stimuli including chemical as well as physical
factors. We have characterized the stress-activated MAP kinase (SAMK) pathway in plants that is involved in mediating touch,
drought, cold, and wounding. The SAMK pathway is activated by a posttranslational mechanism, but inactivation requires de
novo expression of gene(s). One of these genes isMP2C encoding a protein phosphatase type 2C that is able to inactivate the SAMK pathway.MP2C expression itself is regulated by the SAMK pathway and constitutes a negative feedback mechanism for resetting the pathway.
The extended abstract of a paper presented at the 13th International Symposium in Conjugation with Award of the International
Prize for Biology “Frontier of Plant Biology” |
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Keywords: | MAP kinase Protein phosphatase 2C Signal transduction Stress |
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