The Arabidopsis thaliana response regulator ARR22 is a putative AHP phospho-histidine phosphatase expressed in the chalaza of developing seeds |
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| Authors: | Jakub Horák Christopher Grefen Kenneth W Berendzen Achim Hahn York-Dieter Stierhof Bettina Stadelhofer Mark Stahl Csaba Koncz Klaus Harter |
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| Affiliation: | 1.Zentrum für Molekularbiologie der Pflanzen/Pflanzenphysiologie,Universit?t Tübingen,Tübingen,Germany;2.Zentrum für Molekularbiologie der Pflanzen/Mikroskopie,Universit?t Tübingen,Tübingen,Germany;3.Max Planck Institut für Züchtungsforschung,K?ln,Germany |
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| Abstract: | Background The Arabidopsis response regulator 22 (ARR22) is one of two members of a recently defined novel group of two-component system (TCS) elements. TCSs are stimulus perception and response modules of prokaryotic origin, which signal by a His-to-Asp phosphorelay mechanism. In plants, TCS regulators are involved in hormone response pathways, such as those for cytokinin and ethylene. While the functions of the other TCS elements in Arabidopsis, such as histidine kinases (AHKs), histidine-containing phosphotransfer proteins (AHPs) and A-type and B-type ARRs are becoming evident, the role of ARR22 is poorly understood. |
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