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CallSim: Evaluation of Base Calls Using Sequencing Simulation.

Jarrett D Morrow1, Brandon W Higgs1

  • 1Center for Biotechnology Education, Johns Hopkins University, Baltimore, MD 21218, USA.

ISRN Bioinformatics
|May 5, 2015
PubMed
Summary
This summary is machine-generated.

CallSim software validates base calls in sequencing data, correcting errors for accurate rare variant identification. This tool supports Ion Torrent and 454 sequencing, enhancing biological interpretation.

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Area of Science:

  • Genomics
  • Bioinformatics
  • Computational Biology

Background:

  • Accurate base calls in sequencing data are crucial for biological interpretation, especially for rare variants.
  • Sequencing technologies like Ion Torrent and 454 can produce errors that complicate downstream analysis.
  • Existing methods may not adequately address low-volume read processing or specific error types.

Purpose of the Study:

  • To introduce CallSim, a software application designed to validate base calls and identify sequencing errors.
  • To demonstrate CallSim's effectiveness in correcting errors and classifying variants in Ion Torrent and 454 sequencing data.
  • To provide a tool for robust, hands-on downstream analysis for accurate rare variant detection.

Main Methods:

  • CallSim employs a Monte Carlo simulation approach to analyze individual sequencing reads.
  • The algorithm does not rely on information from other reads within the dataset.
  • It processes sequencing data to provide evidence for the validity of base calls.

Main Results:

  • CallSim effectively corrects errors in Ion Torrent reads, specifically identifying erroneous homopolymer calls in Staphylococcus aureus mutation studies.
  • The software demonstrates "base rescue" capabilities, supporting the identification of rare variants in 454 mixed viral population data.
  • Its application in general read correction and error-or-variant classification highlights its utility for robust low-volume read processing.

Conclusions:

  • CallSim provides valuable evidence for base call validity in 454 and Ion Torrent sequencing data.
  • The software is a practical tool for hands-on downstream analysis, aiding in the accurate identification of rare variants.
  • CallSim enhances the reliability of sequencing data interpretation, particularly in complex biological samples.