AELs suppress ABA signaling and responses by phosphorylating and destabilizing ABA receptors PYR/PYLs
Ontology highlight
ABSTRACT:
INSTRUMENT(S): Q Exactive
ORGANISM(S): Arabidopsis Thaliana (mouse-ear Cress)
TISSUE(S): Plant Cell, Whole Body
SUBMITTER: 
li qu
LAB HEAD: Hongwei Xue
PROVIDER: PXD008565 | Pride | 2022-02-23
REPOSITORIES: Pride
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| col-PYL1-1.raw | Raw | |||
| col-PYL1-ABA.msf | Msf | |||
| col-PYL1-ABA.mzXML | Mzxml | |||
| col-PYL1-ABA.pdResult | Other | |||
| col-PYL1-ABA.raw | Raw |
Items per page: 5 1 - 5 of 24 |
Similar Datasets
Project description:Abscisic acid (ABA) is a key hormone for plant growth, development and stress adaptation. Perception of ABA through four types of receptors has been reported. We show here that impairment of ABA perception through the PYR/PYL/RCAR branch reduces vegetative growth and seed production, and leads to a severely open stomata and dramatic ABA insensitive phenotype, even though other branches for ABA perception remain functional. Arabidopsis sextuple mutant impaired in 6 PYR/PYL receptors, namely PYR1, PYL1, PYL2, PYL4, PYL5 and PYL8, was able to germinate and grow even on 100 mM ABA. Whole-rosette stomatal conductance (Gst) measurements revealed that leaf transpiration in the sextuple pyr/pyl mutant was higher than in the ABA-deficient aba3-1 or ABA-insensitive snrk2.6 mutants. The gradually increasing Gst values of plants lacking three, four, five and six PYR/PYLs indicate quantitative regulation of stomatal aperture by this family of receptors. The sextuple mutant lacked ABA-mediated activation of SnRK2s and ABA-responsive gene expression was dramatically impaired as was reported in snrk2.2/2.3/2.6. In summary, these results show that ABA perception by PYR/PYLs plays a major role to regulate seed germination and establishment, basal ABA signaling required for vegetative and reproductive growth, stomatal aperture and transcriptional response to the hormone. Four biological replicates were generated for the 3 genotypes, pyr1pyl1pyl2pyl4pyl5pyl8 sextuple mutant, snrk2.2/2.3/2.6 triple mutant, and Col-0. All the samples were treated with ABA for 3 hours before harvesting. The four Col-0 samples were mix to create an unique reference Col-0 sample. Two comparasion were made, fisrt one, PYR/PYL sextuple mutant versus Col-0 reference sample and second one, SnRK2 triple mutant versus Col-0 reference sample. In each comparasion four biological replicates were made. Replicas number 1 and 2 were labeled with Cy5 for the mutant sample and Cy3 for the Col-0 reference sample, while the other two replicas,#3 and #4, were reversed-labeled.
2012-11-30 | E-GEOD-36692 | biostudies-arrayexpress
Project description:Abscisic acid (ABA) is a key hormone for plant growth, development and stress adaptation. Perception of ABA through four types of receptors has been reported. We show here that impairment of ABA perception through the PYR/PYL/RCAR branch reduces vegetative growth and seed production, and leads to a severely open stomata and dramatic ABA insensitive phenotype, even though other branches for ABA perception remain functional. Arabidopsis sextuple mutant impaired in 6 PYR/PYL receptors, namely PYR1, PYL1, PYL2, PYL4, PYL5 and PYL8, was able to germinate and grow even on 100 mM ABA. Whole-rosette stomatal conductance (Gst) measurements revealed that leaf transpiration in the sextuple pyr/pyl mutant was higher than in the ABA-deficient aba3-1 or ABA-insensitive snrk2.6 mutants. The gradually increasing Gst values of plants lacking three, four, five and six PYR/PYLs indicate quantitative regulation of stomatal aperture by this family of receptors. The sextuple mutant lacked ABA-mediated activation of SnRK2s and ABA-responsive gene expression was dramatically impaired as was reported in snrk2.2/2.3/2.6. In summary, these results show that ABA perception by PYR/PYLs plays a major role to regulate seed germination and establishment, basal ABA signaling required for vegetative and reproductive growth, stomatal aperture and transcriptional response to the hormone.
2012-11-30 | GSE36692 | GEO
Project description:ABA signaling relies on the perception of the hormone by 14 different members of the PYR/PYL/RCAR family of ABA receptors. Upon ABA binding, receptors become active in inhibiting a family of type 2C protein phosphatases that usually function as negative regulators on protein kinases of the SnRK2 family. Previous physiological and genetic data supporting a negative role exerted by nitric oxide (NO) on ABA signaling have been reported. Our preliminary data suggested that negative regulation exerted by NO on ABA signaling may involve direct effects of NO on ABA receptors. Here we explore whether the effects of NO on ABA signaling are due to post-translational modifications (PTMs) on ABA receptors. Two main PTMs are functionally related to NO, the S-nitrosylation of C residues and the nitration of Y residues and they have been studied in this work. Because our data suggest that NO can also modulate the stability of the receptor proteins, we have also analyzed another PTM, the ubiquitination of K residues. A double approach based on in vitro nitration of recombinant PYR/PYL/RCAR proteins as well as in planta expression of HA-tagged versions of the receptors, followed by immunopurification strategies based on anti-3-nitroY-coated magnetic beads, and LC-MS/MS analyses of the immunopurified proteins under non-reducing conditions allowed us to identify peptides containing nitroY (mass shifts of +45), S-nitrosylated C (mass shifts of +29), and K-GG tags resulting from the trypsin digestion of ubiquitin tails (mass shift of + 114). Our data suggest that S-nitrosylation of cysteines from PYR/PYL receptors occur in planta but has not effect on receptor function as tested in vitro. By contrast, the nitration of several Y residues of PYR/PYL receptors completely inactivates them, promotes also their polyubiquitination and marks them for subsequent proteasomal degradation, thus representing a rapid mechanism for lowering ABA sensitivity when required in the plant.
2015-09-09 | PXD002396 | Pride
Project description:Analysis of abscisic acid (ABA) perception and signaling in crops is complicated by the multigenic nature of the PYR/PYL/RCAR ABA receptor family and the reported functional redundancy, which is a formidable challenge, particularly in polyploid plants. Therefore, few molecular genetics studies have been performed in crop species to study the contribution of ABA signaling to balance plant growth and adaptation to the environment. Our data reveal ABA-responsive genes in Nicotiana benthamiana, an allotetraploid biotech crop, and provide a molecular framework for gene expression analyses aimed at optimizing plant growth and environmental adaptation in agriculture. To obtain the genome-wide transcriptional effect of ABA in Nb WT plants, we performed RNA-seq studies as described in experimental procedures. Differential gene expression analysis between mock- and ABA-treated seedlings was done with DESeq2 and genes with an absolute value of log2 fold change (log2FC) > 1 or (log2FC) < -1 and p-adjusted value (padj) < 0.05 were selected
2024-08-13 | GSE255725 | GEO
Project description:The plant hormone abscisic acid (ABA) is best known for its role as a regulator of the responses to abiotic stressors. Components of ABA signaling pathway are thus considered as promising targets for securing yield under stress. ABA levels rise in response to abiotic stress, mounting a number of physiological and metabolic responses that promote plant survival under unfavorable conditions. ABA elicits its effects by binding to a family of soluble receptors called PYR/PYL/RCAR. Arabidopsis genome encodes 14 PYL proteins, knowledge on differential biological functions of these members is scarce. In this work, we took a gain-of-function approach to predict receptor-specific functionality. We introduced a set of activating mutations in the mobile gate and α-helix of sub family II ABA receptors. These mutations constitutively enforce the active ABA-bound conformation. We then transformed ABA deficient mutants with the constitutive receptors and monitored suppression of ABA deficiency phenotype. Our findings suggest that subfamily II receptors have differential activity in regulating transpiration and transcription of oxidation and stress response genes. These differences partly derived from differential accumulation of PYLs in the guard cells. Data mining revealed that only a small subset of PYL receptors are transcribed in the guard cells in a steady state. Because the guard cell specific receptors have different affinity to ABA and to the PP2C co-receptor we propose that, a combined partial receptor redundancy facilitate a gradual activation of the ABA output signal as its cellular concentration rises via biochemically different receptors.
2023-08-15 | GSE181260 | GEO
Project description:Phytohormone abscisic acid (ABA) regulates key aspects of plant development such as seed germination, as well as responses to important environmental stresses, including drought, salinity and cold temperatures. The ABA signaling pathway is tightly controlled by the ubiquitin proteasome system. CULLIN4-RING E3 ubiquitin ligases use the substrate receptor module COP10-DDB1-DET1-DDA1 (CDDD) to target PYL8, one of the ABA receptors of the PYR/PYL/RCAR (pyrabactin resistance/pyrabactin resistance-like/regulatory components of ABA) family. Therefore, CRL4-CDDD complexes are negative regulators of ABA-mediated stress responses. Conversely, ABA treatments attenuate PYL8 receptor degradation, although the precise molecular details of this mechanism remained unknown. Here, we show that ABA promotes the disruption of CRL4-CDDD complexes, leading to PYL8 stabilization. ABA-mediated CRL4-CDDD dissociation likely involves altered association between DDA1-containing complexes and the CSN, a master regulator of the assembly of cullin-based E3 ligases, including CRL4-CDDD. Indeed, treatments with CSN5i-3, an inhibitor of the CSN activity, suppressed the ABA effect on CRL4-CDDD assembly. Altogether, our findings indicate that ABA stabilizes PYL8 by altering the dynamics of the CRL4-CDDD-CSN complex association, unveiling a regulatory mechanism by which a plant hormone inhibits an E3 ubiquitin ligase to protect its own receptors from degradation.
2024-09-11 | PXD055735 | Pride
Project description:Phytohormone abscisic acid (ABA) regulates key aspects of plant development such as seed germination, as well as responses to important environmental stresses, including drought, salinity and cold temperatures. The ABA signaling pathway is tightly controlled by the ubiquitin proteasome system. CULLIN4-RING E3 ubiquitin ligases use the substrate receptor module COP10-DDB1-DET1-DDA1 (CDDD) to target PYL8, one of the ABA receptors of the PYR/PYL/RCAR (pyrabactin resistance/pyrabactin resistance-like/regulatory components of ABA) family. Therefore, CRL4-CDDD complexes are negative regulators of ABA-mediated stress responses. Conversely, ABA treatments attenuate PYL8 receptor degradation, although the precise molecular details of this mechanism remained unknown. Here, we show that ABA promotes the disruption of CRL4-CDDD complexes, leading to PYL8 stabilization. ABA-mediated CRL4-CDDD dissociation likely involves altered association between DDA1-containing complexes and the CSN, a master regulator of the assembly of cullin-based E3 ligases, including CRL4-CDDD. Indeed, treatments with CSN5i-3, an inhibitor of the CSN activity, suppressed the ABA effect on CRL4-CDDD assembly. Altogether, our findings indicate that ABA stabilizes PYL8 by altering the dynamics of the CRL4-CDDD-CSN complex association, unveiling a regulatory mechanism by which a plant hormone inhibits an E3 ubiquitin ligase to protect its own receptors from degradation.
2024-09-11 | PXD055583 | Pride
Project description:We found that TOR kinase regulates the plant environmental stress responses through phosphorylation at a conserved serine residue of Abscisic acid receptor PYR1/PYLs/RCARs. The phosphorylation inhibits the function of PYLs and prevents the binding of PYLs to abscisic acid and its downstream substrates of PP2C, which blocks the ABA and stress signaling. Our results suggest that plant utilizes this mechanism as a hub to regulate the ABA-mediate stress responses and growth recovery
2017-12-01 | PXD003746 | Pride
Project description:Abscisic acid (ABA) plays a key role in plant development and responses to abiotic stress. A wide number of regulatory mechanisms on ABA perception and signaling are known, including transcriptional regulation and post-translational regulations; however, less to know about the post-transcriptional regulations. In this work, we have found that SKIP, a splicing factor in spliceosome, positively regulates ABA signal transduction. Mutation of SKIP, skip-1, confers ABA insensitive phenotype in seed germination, root growth, and ABA-responsive gene expression. Transformation of SKIP genomic DNA to skip-1 is able to recover its defects. SKIP binds to the pre-mRNA of genes in ABA signaling, such as PYL8, to regulate their splicing. The alternative splicing of PYL7, PYL8, ABF2, and ABI5 in ABA pathway is disrupted by skip-1, reducing the mRNA levels of them. The abnormal splicing of PP2Cs activates their transcription by skip-1, suggesting there is a feedback regulation for PP2Cs caused by skip-1. The down-regulation of PYL ABA receptors, ABF2 and ABI5 ABA response transcription factors, and the up-regulation of PP2Cs through alternative splicing reduce the plant responses to ABA in skip-1. SKIP is required for ABA-mediated genome-wide alternative splicing. ABA treatment enhances the novel splicing events in WT genome-widely. The novel alternative splicing events are increased by skip-1 in the absence and present of ABA. Our results first reveal a principle on how a splicing factor affects the ABA signaling.
2023-02-02 | GSE144823 | GEO
Project description:This model is from the article:
A thermodynamic switch modulates abscisic acid receptor sensitivity.
Dupeux F, Santiago J, Betz K, Twycross J, Park SY, Rodriguez L, Gonzalez-Guzman M, Jensen MR, Krasnogor N, Blackledge M, Holdsworth M, Cutler SR, Rodriguez PL, Márquez JA EMBO J.
[2011 Oct; Volume: 30 (Issue: 20 )] Page info: 4171-84 21847091
,
Abstract:
Abscisic acid (ABA) is a key hormone regulating plant growth, development and the response to biotic and abiotic stress. ABA binding to pyrabactin resistance (PYR)/PYR1-like (PYL)/Regulatory Component of Abscisic acid Receptor (RCAR) intracellular receptors promotes the formation of stable complexes with certain protein phosphatases type 2C (PP2Cs), leading to the activation of ABA signalling. The PYR/PYL/RCAR family contains 14 genes in Arabidopsis and is currently the largest plant hormone receptor family known; however, it is unclear what functional differentiation exists among receptors. Here, we identify two distinct classes of receptors, dimeric and monomeric, with different intrinsic affinities for ABA and whose differential properties are determined by the oligomeric state of their apo forms. Moreover, we find a residue in PYR1, H60, that is variable between family members and plays a key role in determining oligomeric state. In silico modelling of the ABA activation pathway reveals that monomeric receptors have a competitive advantage for binding to ABA and PP2Cs. This work illustrates how receptor oligomerization can modulate hormonal responses and more generally, the sensitivity of a ligand-dependent signalling system.
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To cite BioModels Database, please use: Li C, Donizelli M, Rodriguez N, Dharuri H, Endler L, Chelliah V, Li L, He E, Henry A, Stefan MI, Snoep JL, Hucka M, Le Novère N, Laibe C (2010) BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models. BMC Syst Biol., 4:92.
2005-01-01 | MODEL1202030000 | BioModels