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• W2017682307 abstract "AtFBS1 is an F-box protein whose transcript accumulates in response to biotic and abiotic stresses. Previous evidence suggests that a postranscriptional event regulates AtFBS1 expression [1]. We now found that AtFBS1 interacts with 14-3-3 proteins through its amino-terminus and the F-box motif. Deletion of any of these regions abolishes the interaction between AtFBS1 and 14-3-3 proteins. On the other hand, the treatment with the proteasome inhibitor MG132 or the deletion of the F-box from AtFBS1 increases β-glucuronidase (GUS) activity in plants containing a translational fusion of AtFBS1 with the GUS reporter gene, indicating that AtFBS1 is degraded by the 26S proteasome. MG132 treatment of seedlings containing a gene fusion between AtFBS1 and the TAP (Tandem Affinity Purification) cassette causes an increase in the half-life of the protein. In an attempt to understand the role of 14-3-3 interactions, we treated Arabidopsis seedlings with 5-aminoimidazole-4-carboxamide-1-β-d-ribofuranosyl 5′-monophosphate (AICAR), an inhibitor of 14-3-3 client interactions. We observed an increase in AtFBS1-TAP stability as a consequence of AICAR treatment. Based on these data we propose that 14-3-3 proteins promote the dimerization of SCFAtFBS1. This also may enhance the AtFBS1 autoubiquitination activity and its degradation by the 26S proteasome. AICAR also affects Cullin1 (CUL1) modification by RUB1, which would provide an additional element to the effect of this compound on AtFBS1 stability." @default.
• W2017682307 created "2016-06-24" @default.
• W2017682307 creator A5020120578 @default.
• W2017682307 creator A5050778142 @default.
• W2017682307 date "2012-10-01" @default.
• W2017682307 modified "2023-10-14" @default.
• W2017682307 title "The Arabidopsis F-box protein AtFBS1 interacts with 14-3-3 proteins" @default.
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• W2017682307 doi "https://doi.org/10.1016/j.plantsci.2012.06.009" @default.
• W2017682307 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22920997" @default.
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