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  1. AU="Tae-Houn Kim"
  2. AU="Mias-Lucquin, Dominique"
  3. AU="Karagiannidis, Artemios G"
  4. AU="Alice H Reis"
  5. AU="Malik, Shahbaz A"
  6. AU=Mittal Rajat AU=Mittal Rajat
  7. AU="Seguin, Rebecca A"
  8. AU="Tinbergen, Jan"
  9. AU="Rodrigues-Díez, Raquel"
  10. AU="Yang, Haihao"

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  1. Artikel ; Online: Arabidopsis OSMOTIN 34 Functions in the ABA Signaling Pathway and Is Regulated by Proteolysis

    Eun-Joo Park / Tae-Houn Kim

    International Journal of Molecular Sciences, Vol 22, Iss 7915, p

    2021  Band 7915

    Abstract: Plants have evolutionarily established resistance responses to a variety of abiotic stress conditions, in which ABA mediates the integrated regulation of these stress responses. Numerous proteins function at the transcription level or at the protein ... ...

    Abstract Plants have evolutionarily established resistance responses to a variety of abiotic stress conditions, in which ABA mediates the integrated regulation of these stress responses. Numerous proteins function at the transcription level or at the protein level when contributing to controls of the ABA signaling process. Although osmotin is identified as a salt-inducible protein, its function in the abiotic stress response is yet to be elucidated. To examine the role of Arabidopsis OSMOTIN 34 ( OSM34 ) in the ABA signaling pathway, a deletion mutant osm34 generated by a CRISPR/Cas9 system and the double mutant osm34 osml ( osmotin 34-like ) were analyzed for various ABA responses. Both osm34 and osm34 osml showed reduced levels of ABA responses in seeds and leaves. Moreover, proline level and expression of the proline biosynthesis gene P5CS1 was significantly reduced in osm34 osml. Interestingly, OSM34 binds to SKP2A, an F-Box protein whose transcription is induced by ABA. The protein stability of OSM34 was determined to be under the control of the 26S proteasome. In conclusion, our data suggest that OSM34 functions as a positive regulator in the generation of ABA responses and is under post-translational control.
    Schlagwörter OSMOTIN 34 ; OSMOTIN 34-like ; abscisic acid ; F-Box gene ; Biology (General) ; QH301-705.5 ; Chemistry ; QD1-999
    Thema/Rubrik (Code) 580 ; 572
    Sprache Englisch
    Erscheinungsdatum 2021-07-01T00:00:00Z
    Verlag MDPI AG
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  2. Artikel ; Online: Fine-Tuning of Gene Expression by tRNA-Derived Fragments during Abiotic Stress Signal Transduction

    Eun Joo Park / Tae-Houn Kim

    International Journal of Molecular Sciences, Vol 19, Iss 2, p

    2018  Band 518

    Abstract: When plants are subjected to unfavorable environmental conditions, overall gene expression in stressed cells is altered from a programmed pattern for normal development to an adaptive pattern for survival. Rapid changes in plant gene expression include ... ...

    Abstract When plants are subjected to unfavorable environmental conditions, overall gene expression in stressed cells is altered from a programmed pattern for normal development to an adaptive pattern for survival. Rapid changes in plant gene expression include production of stress responsive proteins for protection as well as reduction of irrelevant proteins to minimize energy consumption during growth. In addition to the many established mechanisms known to modulate gene expression in eukaryotes, a novel strategy involving tRNA-derived fragments (tRFs) was recently reported to control gene expression. In animals, tRFs are shown to play a certain role in infected or cancer cells. However, tRFs are expected to function in the regulation of gene expression against abiotic stress conditions in plants. Moreover, the underlying mechanism linking up-regulation of tRFs under stress conditions with the stress tolerant response remains unknown. In this review, the biogenesis and putative function of diverse tRFs in abiotic stress signaling are discussed with a focus on tRFs as a transcriptional/post-transcriptional/translational regulator.
    Schlagwörter tRNA derived fragment ; abscisic acid ; abiotic stress ; post-transcriptional gene silencing ; plant ; Biology (General) ; QH301-705.5 ; Chemistry ; QD1-999
    Sprache Englisch
    Erscheinungsdatum 2018-02-01T00:00:00Z
    Verlag MDPI AG
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  3. Artikel: Production of ABA responses requires both the nuclear and cytoplasmic functional involvement of PYR1

    Park, EunJoo / Tae-Houn Kim

    Biochemical and biophysical research communications. 2017 Feb. 26, v. 484

    2017  

    Abstract: Abscisic acid (ABA) enhances stress tolerant responses in plants against unfavorable environmental conditions. In Arabidopsis, ABA promotes interactions between PYR/PYL/RCARs and PP2C, thereby allowing SnRK2s to phosphorylate downstream components ... ...

    Abstract Abscisic acid (ABA) enhances stress tolerant responses in plants against unfavorable environmental conditions. In Arabidopsis, ABA promotes interactions between PYR/PYL/RCARs and PP2C, thereby allowing SnRK2s to phosphorylate downstream components required for the regulation of gene expression or for gating ion channels. Because PYR1 is known to localize to nucleus and cytoplasm it is a question whether nuclear or cytoplasmic PYR1 confer different functions to the ABA signaling pathway, as has been previously shown for regulatory proteins. In order to answer this question, transgenic lines expressing nuclear PYR1 were generated in an ABA insensitive mutant background. Enforced nuclear expression of PYR1 was examined by confocal microscopy and western blot analysis. Physiological analyses of the transgenic lines demonstrated that nuclear PYR1 is sufficient to generate ABA responses, such as, the inhibition of seed germination, root growth inhibition, the induction of gene expression, and stomatal closing movement. However, for the full recovery of ABA responses in the mutant background cytoplasmic PYR1 was required. The study suggests both nuclear and cytoplasmic PYR1 participate in the control of ABA signal transduction.
    Schlagwörter Arabidopsis ; Western blotting ; abscisic acid ; confocal microscopy ; cytoplasm ; environmental factors ; gene expression ; gene induction ; genetically modified organisms ; growth retardation ; ion channels ; mutants ; regulatory proteins ; root growth ; seed germination ; signal transduction ; stomatal movement
    Sprache Englisch
    Erscheinungsverlauf 2017-0226
    Umfang p. 34-39.
    Erscheinungsort Elsevier Inc.
    Dokumenttyp Artikel
    ZDB-ID 205723-2
    ISSN 0006-291X ; 0006-291X
    ISSN (online) 0006-291X
    ISSN 0006-291X
    DOI 10.1016/j.bbrc.2017.01.082
    Datenquelle NAL Katalog (AGRICOLA)

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