INSECT: In silico search for co-occurring transcription factors

CRISTIAN O. ROHR; R. GONZALO PARRA; PATRICIO YANKILEVICH; CAROLINA PEREZ-CASTRO

BIOINFORMATICS (OXFORD, ENGLAND)

OXFORD UNIV PRESS

Lugar: Oxford; Año: 2013 vol. 29 p. 2852 - 2858

1367-4803

Abstract Motivation: Transcriptional regulation occurs through the concerted actions of multiple transcription factors (TFs) that bind cooperatively to cis-regulatory modules (CRMs) of genes. These CRMs usually contain a variable number of transcription factor-binding sites (TFBSs) involved in related cellular and physiological processes. Chromatin immunoprecipitation followed by sequencing (ChIP-seq) has been effective in detecting TFBSs and nucleosome location in order to identify potential CRMs in genome-wide studies. Although several attempts were previously reported to predict the potential binding of TFs at TFBSs within CRMs by comparing different ChIP-seq data, these have been hampered by excessive background, usually emerging as a consequence of experimental conditions. To understand these complex regulatory circuits, it would be helpful to have reliable and updated user-friendly tools to assist in the identification of TFBSs and CRMs for gene(s) of interest. Results: Here we present INSECT (IN-silico SEarch for Co-occurring Transcription factors), a novel web server for identifying potential TFBSs and CRMs in gene sequences. By combining several strategies, INSECT provides flexible analysis of multiple co-occurring TF binding sites, by applying differing search schemes and restriction parameters. Availability: INSECT is freely available as a web server at http://bioinformatics.ibioba-mpsp-conicet.gov.ar/INSECT Contact: cperezcastro@ibioba-mpsp-conicet.gov.ar pyankilevich@ibioba-mpsp-conicet.gov.ar