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Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
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Ultra-long Read Sequencing for Whole Genomic DNA Analysis
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Resolving complex structural variants via nanopore sequencing.

Simone Romagnoli1, Niccolò Bartalucci1, Alessandro Maria Vannucchi1

  • 1CRIMM, Center of Research and Innovation of Myeloproliferative Neoplasms, DENOTHE Excellence Center, Careggi University Hospital and Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy.

Frontiers in Genetics
|September 7, 2023
PubMed
Summary
This summary is machine-generated.

Long-read sequencing, like Oxford Nanopore, improves detection of structural variants (SVs) linked to genetic disorders. Bioinformatics methods enhance SV identification for potential use in routine diagnostics.

Keywords:
bioinformaticslong readmedical geneticsnanopore sequencingpipelinestructural variant

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Area of Science:

  • Genetics
  • Bioinformatics
  • Genomics

Background:

  • High-throughput sequencing has advanced human genetics, identifying structural variants (SVs) as key to genome instability and diseases like cancer and neurodegenerative disorders.
  • Next-generation sequencing (NGS) technologies detect SVs but have limitations due to short read lengths (100-500 bp), hindering resolution of complex structural variations.
  • Long-read sequencing technologies, such as Oxford Nanopore, offer significant advantages by sequencing native DNA molecules (1-100 Kb) with greater accuracy for SV detection.

Purpose of the Study:

  • To review bioinformatics methods for identifying and genotyping structural variants (SVs) using long-read sequencing technologies.
  • To explore the potential of Oxford Nanopore sequencing for investigating human pathological conditions linked to SVs.
  • To discuss the feasibility of integrating nanopore sequencing into routine diagnostic workflows for genetic disorders.

Main Methods:

  • Focus on bioinformatics tools and algorithms designed for structural variant detection.
  • Utilize long-read sequencing data, specifically from Oxford Nanopore platforms, for SV analysis.
  • Comparative analysis of NGS and long-read sequencing approaches for SV resolution.

Main Results:

  • Long-read sequencing technologies overcome NGS limitations in resolving complex and large structural variants.
  • Bioinformatics methods are crucial for accurate identification and genotyping of known and novel SVs.
  • Oxford Nanopore sequencing demonstrates potential for comprehensive SV analysis in human genetics.

Conclusions:

  • Long-read sequencing, particularly Oxford Nanopore, offers a powerful approach to study genome instability and associated diseases.
  • Advancements in bioinformatics are essential for maximizing the utility of long-read sequencing data for SV detection.
  • Nanopore sequencing holds promise for future integration into clinical diagnostics for genetic conditions.