Gitter, AnthonySiegfried, ZehavaKlutstein, MichaelFornés Crespo, Oriol, 1983-Oliva Miguel, BaldomeroSimon, ItamarBar-Joseph, Ziv2016-02-162016-02-162009Gitter A, Siegfried Z, Klutstein M, Fornes O, Oliva B, Simon I et al. Backup in gene regulatory networks explains differences between binding and/nknockout results. Mol Syst Biol. 2009;5:276. DOI: 10.1038/msb.2009.331744-4292http://hdl.handle.net/10230/25829The complementarity of gene expression and protein-DNA interaction data led to several successful models of biological systems. However, recent studies in multiple species raise doubts about the relationship between these two datasets. These studies show that the overwhelming majority of genes bound by a particular transcription factor (TF) are not affected when that factor is knocked out. Here, we show that this surprising result can be partially explained by considering the broader cellular context in which TFs operate. Factors whose functions are not backed up by redundant paralogs show a fourfold increase in the agreement between their bound targets and the expression levels of those targets. In addition, we show that incorporating protein interaction networks provides physical explanations for knockout effects. New double knockout experiments support our conclusions. Our results highlight the robustness provided by redundant TFs and indicate that in the context of diverse cellular systems, binding is still largely functional.application/pdfengCopyright © 2009 EMBO and Nature Publishing Group. This is an open‐access article distributed under the terms of the Creative Commons Attribution License, which permits distribution, and reproduction in any medium, provided the original author and source are credited. This license does not permit commercial exploitation without specific permissionGenòmica -- MetodologiaProteïnes -- Fixacióinfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1038/msb.2009.33info:eu-repo/semantics/openAccess