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  AKINβ1, a regulatory subunit of SnRK1, regulates organic acid metabolism and acts as a global regulator of genes involved in carbon, lipid and nitrogen metabolism

Wang, Y., Wang, L., Micallef, B. J., Tetlow, I. J., Mullen, R. T., Feil, R., et al. (2020). AKINβ1, a regulatory subunit of SnRK1, regulates organic acid metabolism and acts as a global regulator of genes involved in carbon, lipid and nitrogen metabolism. Journal of Experimental Botany, 71(3), 1010-1028. doi:10.1093/jxb/erz460.

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 Urheber:
Wang, You1, Autor
Wang, Liping1, Autor
Micallef, Barry J1, Autor
Tetlow, Ian J1, Autor
Mullen, Robert T1, Autor
Feil, R.2, Autor           
Lunn, J. E.2, Autor           
Emes, Michael J1, Autor
Affiliations:
1External Organizations, ou_persistent22              
2System Regulation, Department Stitt, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753327              

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 Zusammenfassung: The Sucrose Non-fermenting-1-Related Protein Kinase 1 (SnRK1) is a highly conserved heterotrimeric protein kinase in plants. It possesses a catalytic subunit (α) and two regulatory subunits (β and γ). The effects of altered expression of AKINβ1 on carbohydrate metabolism and gene expression in leaves were investigated in an Arabidopsis T-DNA insertion mutant. The contents of key intermediates in the tricarboxylic acid (TCA) cycle of the mutant leaves were markedly reduced throughout the diurnal cycle, coupled with a decrease in measurable respiration rate. Compared to wild-type, 2485 genes and 188 genes were expressed differentially in leaves of the akinβ1 mutant in response to light and darkness respectively. Among these, several genes exhibited very substantial decreases in expression. Notably, expression of particular isoforms of multigene families involved in malate and lipid metabolism, and nitrate uptake showed decreases of 40-240 fold during the light period, but not during darkness. The subcellular localization of AKINβ1 and the regulatory function of N-myristoylation on the subcellular localization of AKINβ1 were investigated, showing that AKINβ1 localizes to Golgi. A model is hypothesized to explain the effects of AKINβ1 on metabolism and gene expression in Arabidopsis.

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Sprache(n): eng - English
 Datum: 2019-102020
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Identifikatoren: DOI: 10.1093/jxb/erz460
BibTex Citekey: 10.1093/jxb/erz460
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Titel: Journal of Experimental Botany
  Andere : J. Exp. Bot
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Oxford : Oxford University Press [etc.]
Seiten: - Band / Heft: 71 (3) Artikelnummer: - Start- / Endseite: 1010 - 1028 Identifikator: ISSN: 0022-0957
CoNE: https://pure.mpg.de/cone/journals/resource/954925413883