Comprehensive Overview of JAZ Proteins in Plants

Abstract

Abstract: Jasmonates（JA）as an important phytohormone regulates many aspects of plant development, reproduction, and defence. Within the JA signaling cascades, jasmonate zim-domain（JAZ）proteins that are triggered by jasmonates play a central role. JAZ proteins regulate JA-responsive gene transcription by inhibiting DNA-binding transcription factors（TFs）in the absence of JA. However, in the presence of JA, JAZ proteins interact in a hormone-dependent manner with Coronatine Insensitive 1（COI1）. After recognition component of the E3 ubiquitin ligase SCFCOI1, as a result, JAZ proteins are ubiquitinated and subsequently degraded in the 26S proteasome, releasing TFs from inhibition and activating JA-responsive gene transcription. This conclusion indicate that JAZ proteins, which function as transcriptional repressors of the JA signaling response, are not merely regulators of the JA signaling pathway, but, through interaction with other proteins, also serve as signaling hubs in the wider hormone regulatory network, plays important roles in plants..

Key words: JAZs, TIFY, Jasmonates

Sun Cheng, Zhou Xiaojin, Chen Rumei, Fan Yunliu, Wang Lei. Comprehensive Overview of JAZ Proteins in Plants[J]. Biotechnology Bulletin, 2014, 0(6): 1-8.

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