His-Asp phosphorelay signaling: a communication avenue between plants and their environment.
His-Asp phosphorelay systems have been recently discovered in plants and have emerged as some of the most important signaling systems. The phosphorelay systems in plants include components with sensor (His-protein kinase) domains, His-containing phosphotransfer (HPt) domains, and receiver (response regulator) domains. Recent studies implicate phosphorelay systems in sensing and propagating signals from a wide variety of external and/or internal stimuli such as ethylene, cytokinin, and osmolarity. In maize and Arabidopsis, some response regulators are up-regulated by both cytokinins and nitrate. These findings imply that the His-Asp phosphorelay may operate in an inorganic nitrogen-signaling pathway mediated by cytokinin in plants.
Sakakibara
H
H
Department of Biological Mechanisms and Functions, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Japan.
Taniguchi
M
M
Sugiyama
T
T
D001224:Aspartic Acid / Q000378:metabolism*; D016207:Cytokines / Q000494:pharmacology; D005030:Ethylenes / Q000494:pharmacology; D006639:Histidine / Q000378:metabolism*; D010766:Phosphorylation / Q000187:drug effects; D010944:Plants / Q000187:drug effects / Q000378:metabolism; D015398:Signal Transduction / Q000187:drug effects / Q000502:physiology*
D016207:Cytokines; D005030:Ethylenes; D001224:Aspartic Acid; D006639:Histidine; C036216:ethylene