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  1. Article: Growth Promotion or Osmotic Stress Response: How SNF1-Related Protein Kinase 2 (SnRK2) Kinases Are Activated and Manage Intracellular Signaling in Plants

    Kamiyama, Yoshiaki / Katagiri, Sotaro / Umezawa, Taishi

    Plants. 2021 July 15, v. 10, no. 7

    2021  

    Abstract: Reversible phosphorylation is a major mechanism for regulating protein function and controls a wide range of cellular functions including responses to external stimuli. The plant-specific SNF1-related protein kinase 2s (SnRK2s) function as central ... ...

    Abstract Reversible phosphorylation is a major mechanism for regulating protein function and controls a wide range of cellular functions including responses to external stimuli. The plant-specific SNF1-related protein kinase 2s (SnRK2s) function as central regulators of plant growth and development, as well as tolerance to multiple abiotic stresses. Although the activity of SnRK2s is tightly regulated in a phytohormone abscisic acid (ABA)-dependent manner, recent investigations have revealed that SnRK2s can be activated by group B Raf-like protein kinases independently of ABA. Furthermore, evidence is accumulating that SnRK2s modulate plant growth through regulation of target of rapamycin (TOR) signaling. Here, we summarize recent advances in knowledge of how SnRK2s mediate plant growth and osmotic stress signaling and discuss future challenges in this research field.
    Keywords abscisic acid ; growth promotion ; osmotic stress ; phosphorylation ; plant growth ; protein kinases ; rapamycin ; stress response
    Language English
    Dates of publication 2021-0715
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2704341-1
    ISSN 2223-7747
    ISSN 2223-7747
    DOI 10.3390/plants10071443
    Database NAL-Catalogue (AGRICOLA)

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  2. Article: Growth Promotion or Osmotic Stress Response: How SNF1-Related Protein Kinase 2 (SnRK2) Kinases Are Activated and Manage Intracellular Signaling in Plants.

    Kamiyama, Yoshiaki / Katagiri, Sotaro / Umezawa, Taishi

    Plants (Basel, Switzerland)

    2021  Volume 10, Issue 7

    Abstract: Reversible phosphorylation is a major mechanism for regulating protein function and controls a wide range of cellular functions including responses to external stimuli. The plant-specific SNF1-related protein kinase 2s (SnRK2s) function as central ... ...

    Abstract Reversible phosphorylation is a major mechanism for regulating protein function and controls a wide range of cellular functions including responses to external stimuli. The plant-specific SNF1-related protein kinase 2s (SnRK2s) function as central regulators of plant growth and development, as well as tolerance to multiple abiotic stresses. Although the activity of SnRK2s is tightly regulated in a phytohormone abscisic acid (ABA)-dependent manner, recent investigations have revealed that SnRK2s can be activated by group B Raf-like protein kinases independently of ABA. Furthermore, evidence is accumulating that SnRK2s modulate plant growth through regulation of target of rapamycin (TOR) signaling. Here, we summarize recent advances in knowledge of how SnRK2s mediate plant growth and osmotic stress signaling and discuss future challenges in this research field.
    Language English
    Publishing date 2021-07-15
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2704341-1
    ISSN 2223-7747
    ISSN 2223-7747
    DOI 10.3390/plants10071443
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Accumulation of Phosphorylated SnRK2 Substrate 1 Promotes Drought Escape in Arabidopsis.

    Katagiri, Sotaro / Kamiyama, Yoshiaki / Yamashita, Kota / Iizumi, Sara / Suzuki, Risa / Aoi, Yuki / Takahashi, Fuminori / Kasahara, Hiroyuki / Kinoshita, Toshinori / Umezawa, Taishi

    Plant & cell physiology

    2023  Volume 65, Issue 2, Page(s) 259–268

    Abstract: Plants adopt optimal tolerance strategies depending on the intensity and duration of stress. Retaining water is a priority under short-term drought conditions, whereas maintaining growth and reproduction processes takes precedence over survival under ... ...

    Abstract Plants adopt optimal tolerance strategies depending on the intensity and duration of stress. Retaining water is a priority under short-term drought conditions, whereas maintaining growth and reproduction processes takes precedence over survival under conditions of prolonged drought. However, the mechanism underlying changes in the stress response depending on the degree of drought is unclear. Here, we report that SNF1-related protein kinase 2 (SnRK2) substrate 1 (SNS1) is involved in this growth regulation under conditions of drought stress. SNS1 is phosphorylated and stabilized by SnRK2 protein kinases reflecting drought conditions. It contributes to the maintenance of growth and promotion of flowering as drought escape by repressing stress-responsive genes and inducing FLOWERING LOCUS T (FT) expression, respectively. SNS1 interacts with the histone methylation reader proteins MORF-related gene 1 (MRG1) and MRG2, and the SNS1-MRG1/2 module cooperatively regulates abscisic acid response. Taken together, these observations suggest that the phosphorylation and accumulation of SNS1 in plants reflect the intensity and duration of stress and can serve as a molecular scale for maintaining growth and adopting optimal drought tolerance strategies under stress conditions.
    MeSH term(s) Arabidopsis/metabolism ; Arabidopsis Proteins/metabolism ; Droughts ; Drought Resistance ; Abscisic Acid/metabolism ; Gene Expression Regulation, Plant ; Protein Serine-Threonine Kinases/genetics ; Protein Serine-Threonine Kinases/metabolism ; Chromosomal Proteins, Non-Histone/metabolism
    Chemical Substances SNF1-related protein kinases (EC 2.7.1.-) ; Arabidopsis Proteins ; Abscisic Acid (72S9A8J5GW) ; SnRK2 protein, Arabidopsis ; Protein Serine-Threonine Kinases (EC 2.7.11.1) ; MRG2 protein, Arabidopsis ; Chromosomal Proteins, Non-Histone ; MRG1 protein, Arabidopsis
    Language English
    Publishing date 2023-11-16
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 208907-5
    ISSN 1471-9053 ; 0032-0781
    ISSN (online) 1471-9053
    ISSN 0032-0781
    DOI 10.1093/pcp/pcad146
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 79/710: Show issues

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  4. Article ; Online: Group C MAP kinases phosphorylate MBD10 to regulate ABA-induced leaf senescence in Arabidopsis.

    Li, Yangdan / Kamiyama, Yoshiaki / Minegishi, Fuko / Tamura, Yuki / Yamashita, Kota / Katagiri, Sotaro / Takase, Hinano / Otani, Masahiko / Tojo, Ryo / Rupp, Gabrielle E / Suzuki, Takamasa / Kawakami, Naoto / Peck, Scott C / Umezawa, Taishi

    The Plant journal : for cell and molecular biology

    2024  

    Abstract: Abscisic acid (ABA) is a phytohormone that promotes leaf senescence in response to environmental stress. We previously identified methyl CpG-binding domain 10 (MBD10) as a phosphoprotein that becomes differentially phosphorylated after ABA treatment in ... ...

    Abstract Abscisic acid (ABA) is a phytohormone that promotes leaf senescence in response to environmental stress. We previously identified methyl CpG-binding domain 10 (MBD10) as a phosphoprotein that becomes differentially phosphorylated after ABA treatment in Arabidopsis. ABA-induced leaf senescence was delayed in mbd10 knockout plants but accelerated in MBD10-overexpressing plants, suggesting that MBD10 positively regulates ABA-induced leaf senescence. ABA-induced phosphorylation of MBD10 occurs in planta on Thr-89, and our results demonstrated that Thr-89 phosphorylation is essential for MBD10's function in leaf senescence. The in vivo phosphorylation of Thr-89 in MBD10 was significantly downregulated in a quadruple mutant of group C MAPKs (mpk1/2/7/14), and group C MAPKs directly phosphorylated MBD10 in vitro. Furthermore, mpk1/2/7/14 showed a similar phenotype as seen in mbd10 for ABA-induced leaf senescence, suggesting that group C MAPKs are the cognate kinases of MBD10 for Thr-89. Because group C MAPKs have been reported to function downstream of SnRK2s, our results indicate that group C MAPKs and MBD10 constitute a regulatory pathway for ABA-induced leaf senescence.
    Language English
    Publishing date 2024-03-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 1088037-9
    ISSN 1365-313X ; 0960-7412
    ISSN (online) 1365-313X
    ISSN 0960-7412
    DOI 10.1111/tpj.16706
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 6071: Show issues

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  5. Article ; Online: Activation of SnRK2 by Raf-like kinase ARK represents a primary mechanism of ABA and abiotic stress responses.

    Islam, Mousona / Inoue, Takumi / Hiraide, Mayuka / Khatun, Nobiza / Jahan, Akida / Kuwata, Keiko / Katagiri, Sotaro / Umezawa, Taishi / Yotsui, Izumi / Sakata, Yoichi / Takezawa, Daisuke

    Plant physiology

    2021  Volume 185, Issue 2, Page(s) 533–546

    Abstract: The Raf-like protein kinase abscisic acid (ABA) and abiotic stress-responsive Raf-like kinase (ARK) previously identified in the moss Physcomitrium (Physcomitrella) patens acts as an upstream regulator of subgroup III SNF1-related protein kinase2 (SnRK2), ...

    Abstract The Raf-like protein kinase abscisic acid (ABA) and abiotic stress-responsive Raf-like kinase (ARK) previously identified in the moss Physcomitrium (Physcomitrella) patens acts as an upstream regulator of subgroup III SNF1-related protein kinase2 (SnRK2), the key regulator of ABA and abiotic stress responses. However, the mechanisms underlying activation of ARK by ABA and abiotic stress for the regulation of SnRK2, including the role of ABA receptor-associated group A PP2C (PP2C-A), are not understood. We identified Ser1029 as the phosphorylation site in the activation loop of ARK, which provided a possible mechanism for regulation of its activity. Analysis of transgenic P. patens ark lines expressing ARK-GFP with Ser1029-to-Ala mutation indicated that this replacement causes reductions in ABA-induced gene expression, stress tolerance, and SnRK2 activity. Immunoblot analysis using an anti-phosphopeptide antibody indicated that ABA treatments rapidly stimulate Ser1029 phosphorylation in the wild type (WT). The phosphorylation profile of Ser1029 in ABA-hypersensitive ppabi1 lacking protein phosphatase 2C-A (PP2C-A) was similar to that in the WT, whereas little Ser1029 phosphorylation was observed in ABA-insensitive ark missense mutant lines. Furthermore, newly isolated ppabi1 ark lines showed ABA-insensitive phenotypes similar to those of ark lines. Therefore, ARK is a primary activator of SnRK2, preceding negative regulation by PP2C-A in bryophytes, which provides a prototype mechanism for ABA and abiotic stress responses in plants.
    MeSH term(s) Abscisic Acid/pharmacology ; Bryopsida/enzymology ; Bryopsida/genetics ; Bryopsida/physiology ; Cell Nucleus/metabolism ; Cytoplasm/metabolism ; Freezing ; Gene Expression Regulation, Plant ; Gene Fusion ; Genes, Reporter ; Mutation, Missense ; Phosphopeptides/metabolism ; Phosphoprotein Phosphatases/genetics ; Phosphoprotein Phosphatases/metabolism ; Phosphorylation ; Plant Growth Regulators/pharmacology ; Plant Proteins/genetics ; Plant Proteins/metabolism ; Protein-Serine-Threonine Kinases/genetics ; Protein-Serine-Threonine Kinases/metabolism ; Stress, Physiological
    Chemical Substances Phosphopeptides ; Plant Growth Regulators ; Plant Proteins ; Abscisic Acid (72S9A8J5GW) ; SNF1-related protein kinases (EC 2.7.1.-) ; Protein-Serine-Threonine Kinases (EC 2.7.11.1) ; Phosphoprotein Phosphatases (EC 3.1.3.16)
    Language English
    Publishing date 2021-03-02
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 208914-2
    ISSN 1532-2548 ; 0032-0889
    ISSN (online) 1532-2548
    ISSN 0032-0889
    DOI 10.1093/plphys/kiaa046
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 1193: Show issues

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  6. Article ; Online: Arabidopsis

    Kamiyama, Yoshiaki / Hirotani, Misaki / Ishikawa, Shinnosuke / Minegishi, Fuko / Katagiri, Sotaro / Rogan, Conner J / Takahashi, Fuminori / Nomoto, Mika / Ishikawa, Kazuya / Kodama, Yutaka / Tada, Yasuomi / Takezawa, Daisuke / Anderson, Jeffrey C / Peck, Scott C / Shinozaki, Kazuo / Umezawa, Taishi

    Proceedings of the National Academy of Sciences of the United States of America

    2021  Volume 118, Issue 30

    Abstract: The phytohormone abscisic acid (ABA) plays a major role in abiotic stress responses in plants, and subclass III SNF1-related protein kinase 2 (SnRK2) kinases mediate ABA signaling. In this study, we identified Raf36, a group C Raf-like protein kinase ... ...

    Abstract The phytohormone abscisic acid (ABA) plays a major role in abiotic stress responses in plants, and subclass III SNF1-related protein kinase 2 (SnRK2) kinases mediate ABA signaling. In this study, we identified Raf36, a group C Raf-like protein kinase in
    MeSH term(s) Abscisic Acid/pharmacology ; Arabidopsis/genetics ; Arabidopsis/growth & development ; Arabidopsis/metabolism ; Arabidopsis Proteins/genetics ; Arabidopsis Proteins/metabolism ; Gene Expression Regulation, Plant/drug effects ; Phosphorylation ; Plant Growth Regulators/pharmacology ; Protein Serine-Threonine Kinases/genetics ; Protein Serine-Threonine Kinases/metabolism ; Signal Transduction ; Stress, Physiological
    Chemical Substances Arabidopsis Proteins ; Plant Growth Regulators ; SnRK2 protein, Arabidopsis ; Abscisic Acid (72S9A8J5GW) ; Protein Serine-Threonine Kinases (EC 2.7.11.1)
    Language English
    Publishing date 2021-06-18
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 209104-5
    ISSN 1091-6490 ; 0027-8424
    ISSN (online) 1091-6490
    ISSN 0027-8424
    DOI 10.1073/pnas.2100073118
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Zs.A 1148: Show issues Location:
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    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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