TSSi--an R package for transcription start site identification from 5' mRNA tag data


High-throughput sequencing has become an essential experimental approach for the investigation of transcriptional mechanisms. For some applications like ChIP-seq, several approaches for the prediction of peak locations exist. However, these methods are not designed for the identification of transcription start sites (TSSs) because such datasets contain qualitatively different noise. In this application note, the R package TSSi is presented which provides a heuristic framework for the identification of TSSs based on 5' mRNA tag data. Probabilistic assumptions for the distribution of the data, i.e. for the observed positions of the mapped reads, as well as for systematic errors, i.e. for reads which map closely but not exactly to a real TSS, are made and can be adapted by the user. The framework also comprises a regularization procedure which can be applied as a preprocessing step to decrease the noise and thereby reduce the number of false predictions. AVAILABILITY: The R package TSSi is available from the Bioconductor web site: www.bioconductor.org/packages/release/bioc/html/TSSi.html.


Projects: A2: Integration of Signalling Pathways in Hepatocellular Response

Bioinformatics 28(12): 1641-2
17th Apr 2012

C Kreutz, J S Gehring, D Lang, R Reski, J Timmer, S A Rensing

help Authors

[Clemens Kreutz] [Jens Timmer]

help Attributions


help Scales

Views: 2175
  • Created: 8th Aug 2012 at 12:11
  • Last updated: 24th Oct 2013 at 16:16

Related items


Log in / Register

Need an account?
Sign up

Forgotten password?

Front Page

Virtual Liver Network


Related Projects and friends

Imprint Taverna workflow workbench myExperiment JWS Online ISATAB myGrid Sabio-RK BioPortal Semantic SBML

Powered by:


Silk icons 1.3
Crystal Clear icons