Predicting functionality of protein-DNA interactions by integrating diverse evidence

Duygu Ucar, A. Beyer, S. Parthasarathy, Christopher Workman

    Research output: Contribution to journalConference articleResearchpeer-review


    Chromatin immunoprecipitation (ChIP-chip) experiments enable capturing physical interactions between regulatory proteins and DNA in vivo. However, measurement of chromatin binding alone is not sufficient to detect regulatory interactions. A detected binding event may not be biologically relevant, or a known regulatory interaction might not be observed under the growth conditions tested so far. To correctly identify physical interactions between transcription factors (TFs) and genes and to determine their regulatory implications under various experimental conditions, we integrated ChIP-chip data with motif binding sites, nucleosome occupancy and mRNA expression datasets within a probabilistic framework. This framework was specifically tailored for the identification of functional and nonfunctional DNA binding events. Using this, we estimate that only 50% of condition-specific protein-DNA binding in budding yeast is functional. We further investigated the molecular factors determining the functionality of protein-DNA interactions under diverse growth conditions. Our analysis suggests that the functionality of binding is highly condition-specific and highly dependent on the presence of specific cofactors. Hence, the joint analysis of both, functional and non-functional DNA binding, may lend important new insights into transcriptional regulation.
    Original languageEnglish
    Issue number12
    Pages (from-to)I137-I144
    Publication statusPublished - 2009


    Dive into the research topics of 'Predicting functionality of protein-DNA interactions by integrating diverse evidence'. Together they form a unique fingerprint.

    Cite this