The Arabidopsis Sensor His-kinase, AHK4, Can Respond to Cytokinins
| Autor: | Hirofumi Aiba, Takeshi Mizuno, Kumiko Miwa, Kuniko Ishikawa, Hisami Yamada, Tomomi Suzuki |
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| Rok vydání: | 2001 |
| Předmět: |
Environmental sensor
Cytokinins Histidine Kinase biology Arabidopsis Proteins Physiology Kinase fungi Arabidopsis Cell Biology Plant Science General Medicine biology.organism_classification medicine.disease_cause Yeast Biochemistry Cytokinin binding Schizosaccharomyces Escherichia coli medicine Arabidopsis thaliana Protein Kinases |
| Zdroj: | Plant and Cell Physiology. 42:107-113 |
| ISSN: | 1471-9053 0032-0781 |
| DOI: | 10.1093/pcp/pce037 |
| Popis: | His-to-Asp (His--Asp) phosphorelay mechanisms are presumably involved in propagation of certain environmental stimuli, including phytohormones, in Arabidopsis thaliana. In addition to the previously characterized His-kinases, namely, the ETR1 family of ethylene receptors, CKI1 cytokinin-sensor, and ATHK1 osomo-sensor, this higher plant has three more His-kinases (named AHK2, AHK3, and AHK4). By employing the well-known His--Asp phosphorelay systems in both the fission yeast and Escherichia coli, evidence is presented showing that the AHK4 His-kinase has an ability to serve as a cytokinin-responsive environmental sensor. Taking advantage of this AHK4-dependent His--Asp phosphorelay system in E. coli, a phosphorelay interaction between the Arabidopsis His-kinase and histidine-containing phosphotransmitters (AHPs) was also demonstrated for the first time. |
| Databáze: | OpenAIRE |
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