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• W1975898034 abstract "Quantitative models for transcriptional regulation have shown great promise for advancing our understanding of the biological mechanisms underlying gene regulation. However, all of the models to date assume a transcription factor (TF) to have either activating or repressing function towards all the genes it is regulating.In this paper we demonstrate, on the example of the developmental gene network in D. melanogaster, that the data-fit can be improved by up to 40% if the model is allowing certain TFs to have dual function, that is, acting as activator for some genes and as repressor for others. We demonstrate that the improvement is not due to additional flexibility in the model but rather derived from the data itself. We also found no evidence for the involvement of other known site-specific TFs in regulating this network. Finally, we propose SUMOylation as a candidate biological mechanism allowing TFs to switch their role when a small ubiquitin-like modifier (SUMO) is covalently attached to the TF. We strengthen this hypothesis by demonstrating that the TFs predicted to have dual function also contain the known SUMO consensus motif, while TFs predicted to have only one role lack this motif.We argue that a SUMOylation-dependent mechanism allowing TFs to have dual function represents a promising area for further research and might be another step towards uncovering the biological mechanisms underlying transcriptional regulation." @default.
• W1975898034 created "2016-06-24" @default.
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• W1975898034 creator A5058034368 @default.
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• W1975898034 date "2010-07-02" @default.
• W1975898034 modified "2023-10-09" @default.
• W1975898034 title "Dual-functioning transcription factors in the developmental gene network of Drosophila melanogaster" @default.
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• W1975898034 doi "https://doi.org/10.1186/1471-2105-11-366" @default.
• W1975898034 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2912886" @default.
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