--- res: bibo_abstract: - Regulatory conflicts occur when two signals that individually trigger opposite cellular responses are present simultaneously. Here, we investigate regulatory conflicts in the bacterial response to antibiotic combinations. We use an Escherichia coli promoter-GFP library to study the transcriptional response of many promoters to either additive or antagonistic drug pairs at fine two-dimensional (2D) resolution of drug concentration. Surprisingly, we find that this data set can be characterized as a linear sum of only two principal components. Component one, accounting for over 70% of the response, represents the response to growth inhibition by the drugs. Component two describes how regulatory conflicts are resolved. For the additive drug pair, conflicts are resolved by linearly interpolating the single drug responses, while for the antagonistic drug pair, the growth-limiting drug dominates the response. Importantly, for a given drug pair, the same conflict resolution strategy applies to almost all genes. These results provide a recipe for predicting gene expression responses to antibiotic combinations.@eng bibo_authorlist: - foaf_Person: foaf_givenName: Mark Tobias foaf_name: Bollenbach, Mark Tobias foaf_surname: Bollenbach foaf_workInfoHomepage: http://www.librecat.org/personId=3E6DB97A-F248-11E8-B48F-1D18A9856A87 orcid: 0000-0003-4398-476X - foaf_Person: foaf_givenName: Roy foaf_name: Kishony, Roy foaf_surname: Kishony bibo_doi: 10.1016/j.molcel.2011.04.016 bibo_issue: '4' bibo_volume: 42 dct_date: 2011^xs_gYear dct_language: eng dct_publisher: Cell Press@ dct_title: Resolution of gene regulatory conflicts caused by combinations of antibiotics@ ...