TY - JOUR
T1 - A chemical inhibitor of jasmonate signaling targets JAR1 in Arabidopsis thaliana
AU - Meesters, Christian
AU - Mönig, Timon
AU - Oeljeklaus, Julian
AU - Krahn, Daniel
AU - Westfall, Corey S.
AU - Hause, Bettina
AU - Jez, Joseph M.
AU - Kaiser, Markus
AU - Kombrink, Erich
N1 - Funding Information:
We thank I. Somssich, C. Wasternack and members of our labs for critical reading of the manuscript and stimulating discussions. We also thank R. Solano (Universidad Autónoma, Madrid, Spain) for kindly providing seeds of the transgenic plant expressing CaMV35S<JAZ1-GUS and J. Mundy (University of Copenhagen, Denmark) for seeds of plants harboring the dual reporter system LOX2p<LUC/LOX2p<GUS. This work was supported by the Max Planck Society (to E.K.), the Deutsche Forschungsgemeinschaft (DFG, Ko1192/6-1/2/3 to E.K.) and a European Research Council Starting grant (grant no. 258413 to M.K.). C.M. was the recipient of an International Max Planck Research School doctoral fellowship (Max Planck Institute for Plant Breeding Research, Köln). Additional support was provided by the National Science Foundation (MCB-1157771 to J.M.J.) and the United States Department of Agriculture–National Institute of Food and Agriculture Predoctoral Fellowship Program (MOW-2010-05240 to C.S.W.).
Publisher Copyright:
© 2014 Nature America, Inc. All rights reserved.
PY - 2014/10/1
Y1 - 2014/10/1
N2 - Jasmonates are lipid-derived plant hormones that regulate plant defenses and numerous developmental processes. Although the biosynthesis and molecular function of the most active form of the hormone, (+)-7-iso-jasmonoyl-L-isoleucine (JA-Ile), have been unraveled, it remains poorly understood how the diversity of bioactive jasmonates regulates such a multitude of plant responses. Bioactive analogs have been used as chemical tools to interrogate the diverse and dynamic processes of jasmonate action. By contrast, small molecules impairing jasmonate functions are currently unknown. Here, we report on jarin-1 as what is to our knowledge the first small-molecule inhibitor of jasmonate responses that was identified in a chemical screen using Arabidopsis thaliana. Jarin-1 impairs the activity of JA-Ile synthetase, thereby preventing the synthesis of the active hormone, JA-Ile, whereas closely related enzymes are not affected. Thus, jarin-1 may serve as a useful chemical tool in search for missing regulatory components and further dissection of the complex jasmonate signaling networks.
AB - Jasmonates are lipid-derived plant hormones that regulate plant defenses and numerous developmental processes. Although the biosynthesis and molecular function of the most active form of the hormone, (+)-7-iso-jasmonoyl-L-isoleucine (JA-Ile), have been unraveled, it remains poorly understood how the diversity of bioactive jasmonates regulates such a multitude of plant responses. Bioactive analogs have been used as chemical tools to interrogate the diverse and dynamic processes of jasmonate action. By contrast, small molecules impairing jasmonate functions are currently unknown. Here, we report on jarin-1 as what is to our knowledge the first small-molecule inhibitor of jasmonate responses that was identified in a chemical screen using Arabidopsis thaliana. Jarin-1 impairs the activity of JA-Ile synthetase, thereby preventing the synthesis of the active hormone, JA-Ile, whereas closely related enzymes are not affected. Thus, jarin-1 may serve as a useful chemical tool in search for missing regulatory components and further dissection of the complex jasmonate signaling networks.
UR - http://www.scopus.com/inward/record.url?scp=84919439156&partnerID=8YFLogxK
U2 - 10.1038/nchembio.1591
DO - 10.1038/nchembio.1591
M3 - Article
C2 - 25129030
AN - SCOPUS:84919439156
SN - 1552-4450
VL - 10
SP - 830
EP - 836
JO - Nature Chemical Biology
JF - Nature Chemical Biology
IS - 10
ER -