scholarly journals H2O2 Inhibits ABA-Signaling Protein Phosphatase HAB1

PLoS ONE ◽  
2014 ◽  
Vol 9 (12) ◽  
pp. e113643 ◽  
Author(s):  
Madhuri Sridharamurthy ◽  
Amanda Kovach ◽  
Yang Zhao ◽  
Jian-Kang Zhu ◽  
H. Eric Xu ◽  
...  
Keyword(s):  
Protein Phosphatase ◽  
Aba Signaling ◽  
Signaling Protein

scholarly journals AITRL, an evolutionarily conserved plant specific transcription repressor regulates ABA response in Arabidopsis

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yanxing Ma ◽  
Hainan Tian ◽  
Rao Lin ◽  
Wei Wang ◽  
Na Zhang ◽  
...  
Keyword(s):  
Stress Response ◽  
Protein Phosphatase ◽  
Aba Signaling ◽  
Response Gene ◽  
Stress Response Genes ◽  
Arabidopsis Protein ◽  
Evolutionarily Conserved ◽  
Increased Sensitivity ◽  
Aba Response ◽  
Transcription Repressors

AbstractExpression of stress response genes can be regulated by abscisic acid (ABA) dependent and ABA independent pathways. Osmotic stresses promote ABA accumulation, therefore inducing the expression of stress response genes via ABA signaling. Whereas cold and heat stresses induce the expression of stress response genes via ABA independent pathway. ABA induced transcription repressors (AITRs) are a family of novel transcription factors that play a role in ABA signaling, and Drought response gene (DRG) has previously been shown to play a role in regulating plant response to drought and freezing stresses. We report here the identification of DRG as a novel transcription factor and a regulator of ABA response in Arabidopsis. We found that the expression of DRG was induced by ABA treatment. Homologs searching identified AITR5 as the most closely related Arabidopsis protein to DRG, and homologs of DRG, including the AITR-like (AITRL) proteins in bryophytes and gymnosperms, are specifically presented in embryophytes. Therefore we renamed DRG as AITRL. Protoplast transfection assays show that AITRL functioned as a transcription repressor. In seed germination and seedling greening assays, the aitrl mutants showed an increased sensitivity to ABA. By using qRT-PCR, we show that ABA responses of some ABA signaling component genes including some PYR1-likes (PYLs), PROTEIN PHOSPHATASE 2Cs (PP2Cs) and SUCROSE NONFERMENTING 1 (SNF1)-RELATED PROTEIN KINASES 2s (SnRK2s) were reduced in the aitrl mutants. Taken together, our results suggest that AITRLs are a family of novel transcription repressors evolutionally conserved in embryophytes, and AITRL regulates ABA response in Arabidopsis by affecting ABA response of some ABA signaling component genes.

scholarly journals Pathway Reconstitution of Abscisic Acid Hormone Activation of SLAC1 Anion Channels via Novel ABA Signaling Protein Kinase

2012 ◽  
Vol 102 (3) ◽  
pp. 550a-551a
Author(s):  
Dennis Brodsky ◽  
Benjamin Brandt ◽  
Shaowu Xue ◽  
Juntaro Negi ◽  
Koh Iba ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Protein Kinase ◽  
Aba Signaling ◽  
Anion Channels ◽  
Signaling Protein

scholarly journals A hypermorphic mutation in the protein phosphatase 2C HAB1 strongly affects ABA signaling inArabidopsis

FEBS Letters ◽  
2006 ◽  
Vol 580 (19) ◽  
pp. 4691-4696 ◽  
Author(s):  
Nadia Robert ◽  
Sylvain Merlot ◽  
Vinh N’Guyen ◽  
Aurélien Boisson-Dernier ◽  
Julian I. Schroeder
Keyword(s):  
Protein Phosphatase ◽  
Aba Signaling ◽  
Protein Phosphatase 2C

scholarly journals EAR1 Negatively Regulates ABA Signaling by Enhancing 2C Protein Phosphatase Activity

2018 ◽  
Vol 30 (4) ◽  
pp. 815-834 ◽  
Author(s):  
Kai Wang ◽  
Junna He ◽  
Yang Zhao ◽  
Ting Wu ◽  
Xiaofeng Zhou ◽  
...  
Keyword(s):  
Phosphatase Activity ◽  
Protein Phosphatase ◽  
Aba Signaling

scholarly journals HONSU, a Protein Phosphatase 2C, Regulates Seed Dormancy by Inhibiting ABA Signaling in Arabidopsis

2013 ◽  
Vol 54 (4) ◽  
pp. 555-572 ◽  
Author(s):  
Woohyun Kim ◽  
Yeon Lee ◽  
Jeongmoo Park ◽  
Nayoung Lee ◽  
Giltsu Choi
Keyword(s):  
Seed Dormancy ◽  
Protein Phosphatase ◽  
Aba Signaling ◽  
Protein Phosphatase 2C

Interaction between abscisic acid receptor PYL3 and protein phosphatase type 2C in response to ABA signaling in maize

Gene ◽  
2014 ◽  
Vol 549 (1) ◽  
pp. 179-185 ◽  
Author(s):  
Ying-Ge Wang ◽  
Hao-Qiang Yu ◽  
Yuan-Yuan Zhang ◽  
Cong-Xian Lai ◽  
Yue-Hui She ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Protein Phosphatase ◽  
Aba Signaling ◽  
Acid Receptor ◽  
Protein Phosphatase Type

scholarly journals Functional and Structural Characterization of RsbU, a Stress Signaling Protein Phosphatase 2C

2004 ◽  
Vol 279 (39) ◽  
pp. 40927-40937 ◽  
Author(s):  
Olivier Delumeau ◽  
Sujit Dutta ◽  
Matthias Brigulla ◽  
Grit Kuhnke ◽  
Steven W. Hardwick ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Protein Phosphatase ◽  
Stress Signaling ◽  
Signaling Protein ◽  
Protein Phosphatase 2C

scholarly journals The UBC27–AIRP3 ubiquitination complex modulates ABA signaling by promoting the degradation of ABI1 in Arabidopsis

2020 ◽  
Vol 117 (44) ◽  
pp. 27694-27702
Author(s):  
Wenbo Pan ◽  
Baoying Lin ◽  
Xiaoyuan Yang ◽  
Lijing Liu ◽  
Ran Xia ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Protein Phosphatase ◽  
Regulatory Mechanism ◽  
Drought Response ◽  
Aba Signaling ◽  
Ring E3 Ligase ◽  
Ubiquitin Conjugating Enzyme ◽  
Ubiquitination System ◽  
Aba Insensitive ◽  
Ring E3

Abscisic acid (ABA) is the key phytohormone in plant drought tolerance and stress adaptation. The clade A protein phosphatase 2Cs (PP2Cs) like ABI1 (ABA-INSENSITIVE 1) work as coreceptors of ABA and regulate multiple ABA responses. Ubiquitination of ABI1 has been proven to play important regulatory roles in ABA signaling. However, the specific ubiquitin conjugating enzyme (E2) involved is unknown. Here, we report that UBC27 is an active E2 that positively regulates ABA signaling and drought tolerance. UBC27 forms the E2-E3 pair with the drought regulator RING E3 ligase AIRP3. Both UBC27 and AIRP3 interact with ABI1 and affect the ubiquitination and degradation of ABI1. ABA activates the expression ofUBC27, inhibits the proteasome degradation of UBC27, and enhances the interaction between UBC27 and ABI1 to increase its activity. These findings uncover a regulatory mechanism in ABA signaling and drought response and provide a further understanding of the plant ubiquitination system and ABA signaling pathway.

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