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JASMONATE-ZIM DOMAIN proteins engage Polycomb chromatin modifiers to modulate Jasmonate signaling in Arabidopsis [ChIP-Seq]

ABSTRACT: JASMONATE-ZIM DOMAIN (JAZ) proteins are key regulators in the JA signaling pathway and function to repress the expression of JA-responsive genes. We found that JAZ proteins directly interact with several chromatin-associated Polycomb proteins to mediate repressive chromatin modifications at part of JA-responsive genes and thus their transcriptional repression in Arabidopsis.

ORGANISM(S): Arabidopsis thaliana

PROVIDER: GSE167636 | GEO | 2023/07/19

REPOSITORIES: GEO

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JASMONATE-ZIM DOMAIN proteins engage Polycomb chromatin modifiers to modulate Jasmonate signaling in Arabidopsis [RNA-Seq]

Project description:JASMONATE-ZIM DOMAIN (JAZ) proteins are key regulators in the JA signaling pathway and function to repress the expression of JA-responsive genes. We found that JAZ proteins directly interact with several chromatin-associated Polycomb proteins to mediate repressive chromatin modifications at part of JA-responsive genes and thus their transcriptional repression in Arabidopsis.

2023-07-19 | GSE167633 | GEO

A pair of NUCLEAR FACTOR Y transcription factors act as positive regulators in jasmonate signaling and disease resistance in Arabidopsis

Project description:The plant hormone jasmonate (JA) regulates plant growth and immunity by orchestrating a genome-wide transcriptional reprogramming. In the resting stage, JASMONATE-ZIM DOMAIN (JAZ) proteins act as main repressors to regulate the expression of JA-responsive genes in the JA signaling pathway. However, the mechanisms underlying de-repression of JA-responsive genes in response to JA treatment remain elusive. Here, we report two nuclear factor Y transcription factors NF- YB2 and NF-YB3 (thereafter YB2 and YB3) play key roles in such de-repression in Arabidopsis. YB2 and YB3 function redundantly and positively regulate plant resistance against necrotrophic pathogen Botrytis cinerea ， which are specially required for transcriptional activation of a set of JA-responsive genes following inoculation. Furthermore, YB2 and YB3 modulated their expression through direct occupancy and interaction with histone demethylase Ref6 to remove repressive histone modifications. Moreover, YB2 and YB3 physically interacted with JAZ repressorsand negatively modulated their abundance, which in turn attenuated the inhibition of JAZ proteins on the transcription of JA- responsive genes, thereby activating JA response and promoting disease resistance. Overall, our study reveals the positive regulator of YB2 and YB3 in JA signaling by positively regulating transcription of JA-responsive genes and negatively modulating the abundance of JAZ proteins.

2024-07-15 | GSE247054 | GEO

A pair of NUCLEAR FACTOR Y transcription factors act as positive regulators in jasmonate signaling and disease resistance in Arabidopsis

2024-07-15 | GSE247053 | GEO

Arabidopsis ECAP is a New Adaptor Protein that Connects JAZ Repressors with TPR2 Co-repressor to Suppress Jasmonate-Responsive Anthocyanin Accumulation

Project description:Suppression mechanism employed by transcriptional repressors is commonly existed in diverse phytohormone signaling. In Arabidopsis thaliana, JASMONATE-ZIM DOMAIN (JAZ) proteins act as transcriptional repressors and involve in different aspects of the JA signaling network, through recruiting general co-repressors TOPLESS (TPL) and TPL-related proteins (TPRs). To accomplish overlapping but also finely separated functions of JAZ proteins, specificadaptor proteins are employed in JA signaling. Novel Interactor of JAZ (NINJA) is an adaptor protein mediates gene repression in JA-dependent root growth inhibition and pathogen defense. However, the adaptor protein(s) modulate other JA responsive biological processes is still a mystery. In this study, we demonstrated that a previously uncharacterized protein, ECAP(EAR-Containing Adaptor Protein) that connects JAZ6/8 and TPR to repress JA-mediated anthocyanin accumulation at low JA level. We also found ECAP-mediated transcriptional repression might play a general role in multiple aspects of plant development and responses to environments.

2019-11-07 | GSE125557 | GEO

JASMONATE-ZIM DOMAIN proteins engage Polycomb chromatin modifiers to modulate Jasmonate signaling in Arabidopsis

Project description:JASMONATE-ZIM DOMAIN proteins engage Polycomb chromatin modifiers to modulate Jasmonate signaling in Arabidopsis

| PRJNA705155 | ENA

JASMONATE-ZIM DOMAIN proteins engage Polycomb chromatin modifiers to modulate Jasmonate signaling in Arabidopsis [ChIP-Seq]

Project description:JASMONATE-ZIM DOMAIN proteins engage Polycomb chromatin modifiers to modulate Jasmonate signaling in Arabidopsis [ChIP-Seq]

| PRJNA705159 | ENA

JASMONATE-ZIM DOMAIN proteins engage Polycomb chromatin modifiers to modulate Jasmonate signaling in Arabidopsis [RNA-Seq]

Project description:JASMONATE-ZIM DOMAIN proteins engage Polycomb chromatin modifiers to modulate Jasmonate signaling in Arabidopsis [RNA-Seq]

| PRJNA705158 | ENA

Expression profiling of wild-type Arabidopsis and an activation-tagged jaz7-1D line.

Project description:Jasmonate (JA) signaling plays a key role in mediating both resistance and susceptibility to the root-infecting fungal pathogen Fusarium oxysporum. Within this system, the roles of the JA-signaling repressor gene family of JASMONATE ZIM-domain (JAZ) genes had not been investigated. By screening JAZ T DNA insertion lines for altered resistance or susceptibility to F. oxysporum, we identified a JAZ7 mutant (jaz7-1D) highly susceptible to F. oxysporum infection. Further analyses revealed jaz7-1D exhibits constitutively active JAZ7 expression, enhanced expression of JA-defense marker genes, and increased sensitivity to JA-inhibition of root elongation. To further explore altered JA-signaling and JA-responses in this mutant, we use whole transcriptome profiling of jaz7-1D versus wild-type (Col-0) plants after mock/control and JA treatment.

2016-02-08 | GSE61884 | GEO

Novel JAZ co-operativity and unexpected JA dynamics underpin Arabidopsis defence responses to Pseudomonas syringae infection

Project description:Pathogens target phytohormone signalling pathways to promote disease. Plants deploy salicylic acid (SA) mediated defences against biotrophs. Pathogens antagonise SA immunity by activating jasmonate signalling, e.g. Pseudomonas syringae pv. tomato DC3000 produces coronatine (COR), a jasmonate (JA) mimic. This study found unexpected dynamics between SA, JA and COR and co-operation between JAZ jasmonate repressor proteins during DC3000 infection. JA did not accumulate until late in the infection process and was higher in leaves challenged with coronatine deficient P. syringae or in the more resistant JA receptor mutant coi1. JAZ regulation was complex and coronatine alone was insufficient to sustainably induce JAZs.

2015-08-28 | GSE72461 | GEO

CONSTANS and jasmonate signaling coordinate floral senescence in Arabidopsis

Project description:Photoperiodic floral initiation in the leaf is controlled by the hub gene CONSTANS (CO) while jasmonates (JAs) control flower senescence. Although both processes are chronologically ordered, no association between them has been described to date. We show that CO protein remains in Arabidopsis flowers after the floral induction, although displaying a different tissue and diurnal pattern than in leaves. We found that changes in CO expression alter flower senescence and abscission by interfering with the JA response, supported by petal specific analysis as well as CO overexpression in JA synthesis and signaling mutants. CO has a ZIM-like domain that mediates interaction with the JA response repressor JAZ3 (jasmonate ZIM-domain 3), inhibiting its repressor activity and activating downstream transcription factors involved in flower senescence. The complex CO-JAZ3 also interacts with the E3 ubiquitin ligase Coronatine Insensitive 1 (COI1) leading to its degradation in the presence of jasmonates. Therefore, the coordinated recruitment of photoperiodic and jasmonate signaling pathways would be an efficient way for plants to chronologically order the floral process and ensure the success of offspring production.

2022-09-26 | GSE204774 | GEO

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