DNA methylation patterns facilitate the identification of microRNA transcription start sites: a brain-specific study

PLoS One. 2013 Jun 24;8(6):e66722. doi: 10.1371/journal.pone.0066722. Print 2013.

Abstract

Predicting the transcription start sites (TSSs) of microRNAs (miRNAs) is important for understanding how these small RNA molecules, known to regulate translation and stability of protein-coding genes, are regulated themselves. Previous approaches are primarily based on genetic features, trained on TSSs of protein-coding genes, and have low prediction accuracy. Recently, a support vector machine based technique has been proposed for miRNA TSS prediction that uses known miRNA TSS for training the classifier along with a set of existing and novel CpG island based features. Current progress in epigenetics research has provided genomewide and tissue-specific reports about various phenotypic traits. We hypothesize that incorporating epigenetic characteristics into statistical models may lead to better prediction of primary transcripts of human miRNAs. In this paper, we have tested our hypothesis on brain-specific miRNAs by using epigenetic as well as genetic features to predict the primary transcripts. For this, we have used a sophisticated feature selection technique and a robust classification model. Our prediction model achieves an accuracy of more than 80% and establishes the potential of epigenetic analysis for in silico prediction of TSSs.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • DNA Methylation*
  • Epigenesis, Genetic
  • Humans
  • MicroRNAs / genetics*
  • Support Vector Machine
  • Transcription, Genetic*

Substances

  • MicroRNAs

Grants and funding

TB gratefully acknowledges Department of Science and Technology, India, for awarding him the INSPIRE Fellowship to carry out his PhD. research work. SB gratefully acknowledges the financial support from the Swarnajayanti project grant no. DST/SJF/ET-02/2006-07 of the Department of Science and Technology, Government of India. Part of the work was conducted when SB visited the Max Planck Institute for Informatics, Saarbrucken, Germany, in 2011-12 on a Humboldt Fellowship for Experienced Researchers. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.