Identification of a Novel Jasmonate-Responsive Element in the AtJMT Promoter and Its Binding Protein for AtJMT Repression
Figure 11
Proposed model for transcription repression by AtBBD1.
In the absence of signal, AtBBD1 represses AtJMT gene expression by recruiting corepressor or HDAc through AtJAZ. In the presence of signal, JA-Ile is released and the SCFCOI1 complex degrades JAZ proteins. A putative activator (+) that binds to the JARE competes with AtBBD1 (repressor). In knockout plants, the putative activator dominantly occupies the JARE and AtJMT gene expression is activated higher than wild type. In the AtBBD1-overexpressing plant, AtBBD1(repressor) competes with the putative activator and dominantly occupies the JARE; therefore, AtJMT gene expression is repressed more than in wild type. Size of each circle represents relative abundance.