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Arabidopsis Book. 2008;6:e0112. doi: 10.1199/tab.0112. Epub 2008 Jul 14.

Two-component signaling elements and histidyl-aspartyl phosphorelays.

Abstract

Two-component systems are an evolutionarily ancient means for signal transduction. These systems are comprised of a number of distinct elements, namely histidine kinases, response regulators, and in the case of multi-step phosphorelays, histidine-containing phosphotransfer proteins (HPts). Arabidopsis makes use of a two-component signaling system to mediate the response to the plant hormone cytokinin. Two-component signaling elements have also been implicated in plant responses to ethylene, abiotic stresses, and red light, and in regulating various aspects of plant growth and development. Here we present an overview of the two-component signaling elements found in Arabidopsis, including functional and phylogenetic information on both bona-fide and divergent elements.

PMID:
22303237
PMCID:
PMC3243373
DOI:
10.1199/tab.0112
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