Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Gene expression density profiles characterize modes of genomic regulation: theory and experiment
Autor Binder, H.; Wirth, H.; Galle, J.;
Journal / Serie Journal of Biotechnology
Erscheinungsjahr 2010
Department PROTEOM;
Band/Volume 149
Heft 3
Sprache englisch;
Keywords Transcriptional regulation; Random genome model; Transcription factor network; Gene expression; Power law distribution
Abstract Our study addresses modes of genomic regulation and their characterization using the distribution of expression values. A simple model of transcriptional regulation is introduced to characterize the response of the global expression pattern to the changing properties of basal regulatory building blocks. Random genomes are generated which express and bind transcription factors according to the appearance of short motifs of coding and binding sequences. Regulation of transcriptional activity is described using athermodynamic model. Our model predicts single-peaked distributions of expression values the flanks of which decay according to power laws. The characteristic exponent is inversely related to the product of the connectivity of the network times the regulatory strength of bound transcription factors. Such 'expression spectra' were calculated and analyzed for different model genomes. Information on structural properties and on the interactions of regulatory elements is used to build up a framework of basiccharacteristics of expression spectra. We analyze examples addressing different biological issues. Peak position and width of the experimental expression spectra vary with the biological context. We demonstrate that the study of the global expression pattern provides valuable information about transcriptional regulation which complements conventional searches for differentially expressed single genes.
ID 9800
dauerhafte UFZ-Verlinkung
Binder, H., Wirth, H., Galle, J. (2010):
Gene expression density profiles characterize modes of genomic regulation: theory and experiment
J. Biotechnol. 149 (3), 98 - 114