Journal
TRENDS IN PLANT SCIENCE
Volume 18, Issue 5, Pages 259-266Publisher
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.tplants.2012.11.002
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Funding
- Targeted Proteins Research Program (TPRP) of the Ministry of Education, Culture, Sports, Science, and Technology (MEXT)
- MEXT
- Japan Society for the Promotion of Science (JSPS)
- Program for Promotion of Basic and Applied Researches for Innovations in Bio-oriented Industry (BRAIN)
- Ministry of Agriculture, Forestry, and Fisheries (MAFF)
- Science and Technology Research Partnership for Sustainable Development (SATREPS) of the Japan Science and Technology Agency (JST)/Japan International Cooperation Agency (JICA)
- Grants-in-Aid for Scientific Research [23228003, 23770104] Funding Source: KAKEN
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The phytohormone abscisic acid (ABA) plays a crucial role in adaptive responses to environmental stresses, such as drought and high salinity, as well as in plant development, such as seed maturation and dormancy. PYR/PYL/RCAR has been identified as a bona fide ABA receptor (ABAR) that constitutes the core regulatory component of ABA signaling networks in plants. Here, we review recent structural and functional studies of the ABAR that have elucidated its activation mechanism, early signaling components, and physiological responses. A crucial event in the receptor's activation was found to be an open-to-closed conformational change in the gate loop of the receptor protein. More recent progress has provided strategies for controlling the gate's closure using chemical agonists or protein engineering approaches.
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