alexa Ca2+-dependent protein kinases and stress signal transduction in plants.


Journal of Antivirals & Antiretrovirals

Author(s): Sheen J

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Abstract Stress responses in plants involve changes in the transcription of specific genes. The constitutively active mutants of two related Ca2+-dependent protein kinases (CDPK1 and CDPK1a) activate a stress-inducible promoter, bypassing stress signals. Six other plant protein kinases, including two distinct CDPKs, fail to mimic this stress signaling. The activation is abolished by a CDPK1 mutation in the kinase domain and diminished by a constitutively active protein phosphatase 2C that is capable of blocking responses to the stress hormone abscisic acid. A variety of functions are mediated by different CDPKs. CDPK1 and CDPK1a may be positive regulators controlling stress signal transduction in plants.
This article was published in Science and referenced in Journal of Antivirals & Antiretrovirals

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