Determination of data analysis pipeline for detection of Thap-9 binding sites in human genome

  1. Vasudha Sharma ,
  2. Sharmistha Majumdar

Authors Affiliation(s)

  • Discipline of Biological Engineering, Indian Institute of Technology, Gandhinagar, INDIA

Can J Biotech, Volume 1, Special Issue, Page 41, DOI:

Presenting author:


Transposons are ubiquitously expressed DNA sequences that can move from one position within the genome to another, resulting in alteration of gene expression, mutations and generation of genome diversity. Human Thap-9 protein is homologous to Drosophila P-element transposase. Previous studies have reported that Human Thap-9 shows excision and integration activity in human cells. Over the past decade, the realm of biotechnology has witnessed an upsurge of computational tools available for analyzing ChIP-seq data. ChIP-seq (Chromatin immunoprecipitation-sequencing) has proven to be a versatile tool for detecting protein-DNA interactions. Since its advent, several modifications of this technique have come into existence. ChIP-exo is a modification of conventional ChIP-seq, which uses lambda exonucleases to digest protruding ends of DNA in protein-DNA complexes followed by next generation sequencing. This technique gives better resolution of binding sites (20bp-90bp), reduces noise and can detect weaker protein-DNA interactions. We are trying to develop a data analysis pipeline for finding Thap-9 binding sites in human genome using ChIP-exo generated reads. For this purpose, we have compared the outputs of different computational tools for various steps in the analysis and have used different freely available online tools for alignment (Bowtie2 and BWA), peak calling (MACS, MACE and GEM) and visualization of the binding sites (MEME and HOMER).


  1. Majumdar, S., Singh, A. and Rio, D. (2013) The Human THAP9 Gene Encodes an Active P-Element DNA Transposase. Science 339: 446-448. Crossref
  2. Pepke, S., Wold, B. and Mortazavi, A. (2009) Computation for ChIP-seq and RNA-seq studies. Nat Methods6: S22-32 Crossref
  3. Rhee, H.S. and Pugh, B.F. (2012) ChIP-exo Method for Identifying Genomic Location of DNA-Binding Proteins with Near-Single-Nucleotide Accuracy. Curr Protoc Mol Biol Chapter 21:Unit 21.24. Crossref