
Abstract The two-component system, consisting of a histidine (His) protein kinase that senses a signal input and a response regulator that mediates the output, is an ancient and evolutionarily conserved signaling mechanism in prokaryotes and eukaryotes. The identification of 54 His protein kinases, His-containing phosphotransfer proteins, response regulators, and related proteins in Arabidopsis suggests an important role of two-component phosphorelay in plant signal transduction. Recent studies indicate that two-component elements are involved in plant hormone, stress, and light signaling. In this review, we present a genome analysis of the Arabidopsis two-component elements and summarize the major advances in our understanding of Arabidopsis two-component signaling.
Cytokinins, Histidine Kinase, Sequence Homology, Amino Acid, Arabidopsis Proteins, Molecular Sequence Data, Phosphotransferases, Arabidopsis, Receptors, Cell Surface, Amino Acid Sequence, Phytochrome, Protein Kinases, Genome, Plant, Phylogeny, Plant Proteins, Signal Transduction
Cytokinins, Histidine Kinase, Sequence Homology, Amino Acid, Arabidopsis Proteins, Molecular Sequence Data, Phosphotransferases, Arabidopsis, Receptors, Cell Surface, Amino Acid Sequence, Phytochrome, Protein Kinases, Genome, Plant, Phylogeny, Plant Proteins, Signal Transduction
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