Prof. Taishi Umezawa "Quest for ABA-responsive phosphosignaling pathways: from model plants to crops" | University of Tartu

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Contacts of UT units

Faculty of Arts and Humanities
Faculty phone: 
+372 737 5341
Faculty address: 
Jakobi 2, rooms 116–121, 51005 Tartu
  • Dean's Office
    Faculty phone: 
    + 372 737 5341
    Faculty address: 
    Jakobi 2, rooms 116–121, 51005 Tartu
  • Institute of History and Archaeology
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    +372 737 5651
    Faculty address: 
    Jakobi 2, 51005 Tartu
  • Institute of Estonian and General Linguistics
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    Faculty address: 
    Jakobi 2, 51005 Tartu
  • Institute of Philosophy and Semiotics
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    Faculty address: 
    Jakobi 2, rooms 309–352, 51005 Tartu
  • Institute of Cultural Research
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    Ülikooli 16, 51003 Tartu
  • School of Theology and Religious Studies
    Faculty phone: 
    +372 737 5301
    Faculty address: 
    Ülikooli 18–310, 50090 Tartu
  • College of Foreign Languages and Cultures
    Faculty address: 
    Lossi 3, 51003 Tartu
  • Viljandi Culture Academy
    Faculty phone: 
    +372 435 5232
    Faculty address: 
    Posti 1, 71004 Viljandi
Faculty of Social Sciences
Faculty phone: 
+372 737 5957
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Lossi 36, 51003 Tartu
  • Dean's Office
    Faculty phone: 
    + 372 737 5900
    Faculty address: 
    Lossi 36, 51003 Tartu
  • Institute of Education
    Faculty phone: 
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    Faculty address: 
    Salme 1a–29, 50103 Tartu
  • Johan Skytte Institute of Political Studies
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    Faculty address: 
    Lossi 36–301, 51003 Tartu
  • School of Economics and Business Administration
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  • Institute of Psychology
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  • Institute of Social Studies
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Faculty of Medicine
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  • Dean's Office
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  • Institute of Biomedicine and Translational Medicine
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  • Institute of Pharmacy
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  • Institute of Dentistry
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  • Institute of Clinical Medicine
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  • Institute of Family Medicine and Public Health
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    Ravila 19, 50411 Tartu
  • Institute of Sport Sciences and Physiotherapy
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    Faculty address: 
    Jakobi 5–205, 51005 Tartu
Faculty of Science and Technology
Faculty phone: 
+372 737 5820
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Vanemuise 46–208, 51014 Tartu
  • Dean's Office
    Faculty phone: 
    +372 737 5820
    Faculty address: 
    Vanemuise 46–208, 51005 Tartu
  • Institute of Computer Science
    Faculty phone: 
    +372 737 5445
    Faculty address: 
    J. Liivi 2, 50409 Tartu
  • Estonian Marine Institute
    Faculty phone: 
    +372 671 8902
    Faculty address: 
    Mäealuse 14, 12618 Tallinn
  • Institute of Physics
    Faculty address: 
    W. Ostwaldi 1, 50411 Tartu
  • Institute of Chemistry
    Faculty phone: 
    +372 737 5261
    Faculty address: 
    Ravila 14a, 50411 Tartu
  • Institute of Mathematics and Statistics
    Faculty phone: 
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    Faculty address: 
    J. Liivi 2, 50409 Tartu
  • Institute of Molecular and Cell Biology
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    Riia 23, 23b–134, 51010 Tartu
  • Tartu Observatory
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  • Institute of Technology
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    Nooruse 1, 50411 Tartu
  • Institute of Ecology and Earth Sciences
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    Faculty address: 
    Vanemuise 46, 51003 Tartu
Institutions
  • Library
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    +372 737 5702
    Faculty address: 
    W. Struve 1, 50091 Tartu
  • Youth Academy
    Faculty phone: 
    +372 737 5581
    Faculty address: 
    Uppsala 10, 51003 Tartu
  • Institute of Genomics
    Faculty phone: 
    +372 737 4000
    Faculty address: 
    Riia 23b, 51010 Tartu
  • Museum
    Faculty phone: 
    +372 737 5674
    Faculty address: 
    Lossi 25, 51003 Tartu
  • University of Tartu Natural History Museum and Botanical Garden
    Faculty phone: 
    +372 737 6076
    Faculty address: 
    Vanemuise 46, 51003 Tartu
Support Units
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    Faculty address: 
    Ülikooli 18a, 51005 Tartu
  • Centre for Entrepreneurship and Innovation
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    +372 737 6339
    Faculty address: 
    Lossi 3, III floor, 51003 Tartu
  • University Office in Tallinn
    Faculty phone: 
    +372 737 6600
    Faculty address: 
    Teatri väljak 3, 10143 Tallinn
  • Estates Office
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    +372 737 5137
    Faculty address: 
    Ülikooli 18a, 51005 Tartu
  • Finance Office
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    +372 737 5125
    Faculty address: 
    Jakobi 4, 51005 Tartu
  • Grant Office
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    Faculty address: 
    Lossi 3, III floor, 51003 Tartu
  • Information Technology Office
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  • Human Resources Office
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    Ülikooli 18, rooms 302 and 304, 50090 Tartu
  • Internal Audit Office
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  • Marketing and Communication Office
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    Ülikooli 18, rooms 102, 104, 209, 210, 50090 Tartu
  • Office of Academic Affairs
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  • Procurement Office
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    Ülikooli 18a, 51005 Tartu
  • Rector's Strategy Office
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    Ülikooli 18, 50090 Tartu
  • Student Council
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Other Units
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    Faculty address: 
    Ujula 4, 51008 Tartu
  • Tartu Student Village
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  • Tartu Students’ Club
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  • University of Tartu Press
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    Faculty address: 
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  • Tartu University Hospital
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  • University of Tartu Foundation
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    Faculty address: 
    Ülikooli 18, 50090 Tartu
  • View all other units

Prof. Taishi Umezawa "Quest for ABA-responsive phosphosignaling pathways: from model plants to crops"

Date: 
12.09.2019 - 14:30

Abscisic acid (ABA) is important for land plants to survive in terrestrial conditions. Protein phosphorylation/dephosphorylation has a central role in ABA signaling, mediated by protein phosphatase 2C (PP2C) and SNF1-related protein kinase 2 (SnRK2). Recently, we are taking a phosphoproteomic approach to elucidate the ABA signaling network in multi-species of land plants, such as Arabidopsis1), Physcomitrella2) and barley3).


For example, Physcomitrella patens is a model species of basal land plants. Our phosphoproteomic analysis detected 4,630 phosphopeptides from P. patens wild-type and two ABA-responsive mutants, such as a PP2C disruptant (ppabi1a/b), and an ARK-defective mutant (AR7), identified as an upstream regulator of SnRK2. Our data revealed: 1) the entire ABA-responsive phosphoproteome in P. patens was quite diverse, 2) P. patens PP2C regulated multiple pathways in addition to the ABA response, and 3) ARK is mainly involved in ABA signaling.
We also obtained a dataset of phosphoproteomic profiles in barley seeds. Seed dormancy is an important trait for agricultural production, and it changes significantly during after-ripening process. We treated ABA to fresh seeds and after-ripened seeds of barley (cv. Golden Promise), and compared their phosphoproteomic profiles. The data suggested that ABA response in fresh seeds could be more active than that in after-ripened seeds at signaling level, suggesting that ABA signaling is somehow impaired by after-ripening process.


On the other hand, recently we identified Raf36 from a protein-protein interaction screening for SnRK2. Biochemical analysis revealed that SnRK2 phosphorylates N-terminal region of Raf36, and reverse-genetic analysis showed that Raf36 negatively regulates ABA response. Furthermore, we found Raf22 functions redundantly with Raf36. Now we are trying to identify substrates of Raf36 or Raf22 by phosphoproteomic analysis.

Location: 
Nooruse 1-144
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