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Targeted DNA Methylation Analysis by Next-generation Sequencing
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MOSAIK: a hash-based algorithm for accurate next-generation sequencing short-read mapping.

Wan-Ping Lee1, Michael P Stromberg1, Alistair Ward1

  • 1Department of Biology, Boston College, Chestnut Hill, Massachusetts, United States of America.

Plos One
|March 7, 2014
PubMed
Summary
This summary is machine-generated.

MOSAIK is a versatile, open-source program for aligning DNA sequencing reads from various technologies to a reference genome. It offers accurate mapping and quality scores, aiding in variant discovery, including structural variants.

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Area of Science:

  • Genomics
  • Bioinformatics
  • Computational Biology

Background:

  • Accurate mapping of sequencing reads to a reference genome is crucial for genomic analysis.
  • Existing mapping tools often struggle with diverse sequencing technologies and complex genomic variations.
  • The need for a sensitive, stable, and versatile aligner is paramount for advancing genomic research.

Purpose of the Study:

  • To introduce MOSAIK, a novel open-source program designed for high-performance read mapping.
  • To demonstrate MOSAIK's capability to align reads from multiple major sequencing platforms.
  • To enhance structural variant discovery through improved read placement confidence and tailored outputs.

Main Methods:

  • MOSAIK utilizes a hash clustering strategy combined with the Smith-Waterman algorithm for accurate alignment.
  • It incorporates a neural network-based scheme to generate well-calibrated mapping quality scores.
  • The program supports explicit handling of known structural variants, such as mobile element insertions.

Main Results:

  • MOSAIK demonstrated consistent mapping across diverse sequencing technologies and data types in the 1000 Genomes Project.
  • Achieved a high correlation coefficient (>0.98) between assigned and actual mapping qualities, indicating reliable confidence scores.
  • Provided tailored outputs to facilitate the discovery of larger structural variants.

Conclusions:

  • MOSAIK is a robust and sensitive tool for mapping sequencing reads across various technologies.
  • Its accurate mapping and quality scoring significantly benefit variant discovery, especially for structural variants.
  • The open-source nature and integration with GKNO enhance its utility for diverse genomic studies.