coronatine;CA Index Guide 2002-2006;(1S,2S)-1-[[(3aS,6R,7aS)-6-ethyl-1-oxo-2,3,3a,6,7,7a-hexahydroindene-4-carbonyl]amino]-2-ethylcyclopropane-1-carboxylic acid
syntheses of four stereoisomers of coronatine employing the exo-selectiveDiels–Alder reaction as a key step. Remarkable differences in stomatal opening activity were observed between enantiomers of coronatine. This result strongly suggests that the stereo structure of coronatine is very important for its stomatal opening activity. In addition, SAR studies suggested that coronatine operates as a molecular
Asymmetric Total Syntheses of (+)-Coronafacic Acid and (+)-Coronatine
作者:Hiroaki Toshima、Shinji Nara、Akitami Ichihara
DOI:10.1271/bbb.61.752
日期:1997.1
An asymmetric total synthesis of (+)-coronafacic acid, starting from (R)-(+)-4-acetoxy-2-cyclopen-1-one as a chiral source, was accomplished. Construction of the 1-hydrindanone framework was carried out by using intramolecular 1, 6-conjugate addition as the key step. Coupling between (+)-coronafacic acid and protected coronamic acid, and subsequent deprotection provided (+)- coronatine. This is the first asymmetric total synthesis of (+)- coronatine.
Coronatine (1), its synthetic analogs (6-13) and jasmonic acid induced various volatiles in rice leaves. In the range of 0.01–0.1 mM, dihydrocoronatine (7) exhibited 4-687 times higher activity for linalool emission than that of 1. The radioactive derivative of 7, [4,5-3H]-7, was employed to identify the putative coronatine-binding protein in rice leaves. 7 would be a promising candidate for a chemical probe to study cornatine-binding protein related to the jasmonoid and octadecanoid signaling pathway in higher plants. A detailed study of coronatine-binding protein in rice leaves and cell culture with [4,5-3H]-7 is now in progress.
[EN] COMPOUNDS AND THEIR USE AS ANTAGONISTS OF JASMONATE PERCEPTION<br/>[FR] COMPOSÉS ET LEUR UTILISATION EN TANT QU'ANTAGONISTES DE PERCEPTION DE JASMONATE
申请人:CONSEJO SUPERIOR INVESTIGACION
公开号:WO2015040061A1
公开(公告)日:2015-03-26
The invention provides compounds, methods and uses suitable for modifying the characteristics of a plant, seed, or plant grown from the seed, by inhibiting jasmonate-mediated processes in the plant. In particular the invention provides jasmonate analogs, or other structurally related analogs, which function as antagonists. These can be used, for example, for improving disease resistance against one or more biotrophic or hemi-biotrophic pathogens, or for improving resistance against abiotic stress.
Design and synthesis of biotin-tagged photoaffinity probes of jasmonates
作者:Min Gu、Jianbin Yan、Zhiyan Bai、Yue-Ting Chen、Wei Lu、Jie Tang、Liusheng Duan、Daoxin Xie、Fa-Jun Nan
DOI:10.1016/j.bmc.2010.03.059
日期:2010.5
Jasmonates (JAs) are a class of oxylipin compounds that play diverse roles in plant defense and development. The F-box protein coronatine insensitive1 (COI1) plays a crucial role in the JA signaling pathway. To determine whether COI1 binds directly to jasmonates, three biotin-tagged photoaffinity probes for JAs, a jasmonic acid photoaffinity probe (PAJA), a JAIle photoaffinity probe (PAJAIle), and a coronatine photoaffinity probe (PACOR), were designed and synthesized based on analysis of JA structure-activity relationships and molecular modeling of the interaction between COI1 and JAs. Among them, PACOR exhibited the most significant biological activity in inhibiting root growth, promoting accumulation of JA-responsive proteins, and triggering COI1-JAZ1 interaction in Arabidopsis seedlings. PACOR is an effective tool for elucidating the interaction between COI1 and JA. (c) 2010 Elsevier Ltd. All rights reserved.