5.0.39 Software. The 2nd derivate method was used for all amplicons to determine Cp values. The standard curve method was used for relative gene expression quantification, and the transcript accumulation of each gene was normalized to 16S rRNA. The amplification efficiency and linear range of amplification were followed for each amplicon on each plate by analyzing a reference sample pool in four dilution steps of cDNA with two replicate wells per dilution step. Each sample was analyzed in two dilutions and two replicates per dilution step. Only samples where the ΔCp between two dilutions of target gene did not deviate
by more than 0.5 from ΔCp of the reference gene were used for relative quantification. The fold changes for each selleck screening library experimental point were calculated as a quotient of average transcript abundances between treated and control samples from three independent biological replicates in each time point. Microarray dataset accession number Microarray data analyzed in this study have been deposited in the Gene Expression Omnibus database with accession
number GSE15394. Acknowledgements The authors would like to acknowledge Dr Ron Peterson (Novartis Institutes for BioMedical Research) for help Tamoxifen with microarray hybridizations and Dr Roger Pain for language revision. The work was supported by Slovenian Research Agency (Grant Nos. P4-0165 and Z4-9697), the European Union FP6 Integrated Project EUR-INTAFAR (Project No. LSHM-CT-2004-512138) under the thematic priority Life Sciences, Genomics and Biotechnology for Health and Lek Pharmaceuticals d.d. Electronic supplementary material Additional file 1: Summary table for differentially expressed genes. Excel spreadsheet file
summarizing the transcriptional data from our study and publicly available transcriptional profiling results Aldehyde dehydrogenase from SAMMD. (XLS 3 MB) Additional file 2: Pathway Studio metabolic network. File containing the representation of S. aureus metabolic network (gpc format). The file can be viewed by Pathway Studio software http://www.ariadnegenomics.com/products/pathway-studio/. (GPC 19 MB) Additional file 3: Gene sets used for GSEA. Excel spreadsheet file containing gene sets generated from TIGRFAM ontology that were used to run GSEA. (XLS 90 KB) References 1. El Zoeiby A, Sanschagrin F, Levesque RC: Structure and function of the Mur enzymes: development of novel inhibitors. Mol Microbiol 2003,47(1):1–12.PubMedCrossRef 2. Freiberg C, Brotz-Oesterhelt H, Labischinski H: The impact of transcriptome and proteome analyses on antibiotic drug discovery. Curr Opin Microbiol 2004,7(5):451–459.PubMedCrossRef 3. Nagarajan V, Elasri MO: SAMMD: Staphylococcus aureus microarray meta-database. BMC Genomics 2007, 8:351.PubMedCrossRef 4. Becker SA, Palsson BO: Genome-scale reconstruction of the metabolic network in Staphylococcus aureus N315: an initial draft to the two-dimensional annotation. BMC Microbiol 2005,5(1):8.PubMedCrossRef 5.