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Genome Annotation and Assembly03:36

Genome Annotation and Assembly

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The genome refers to all of the genetic material in an organism. It can range from a few million base pairs in microbial cells to several billion base pairs in many eukaryotic organisms. Genome assembly refers to the process of taking the DNA sequencing data and putting it all back together in a correct order to create a close representation of the original genome. This is followed by the identification of functional elements on the newly assembled genome, a process called genome annotation.
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The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was  generated by gene duplication and divergence, indicating its critical role in evolution.
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Detection of Copy Number Alterations Using Single Cell Sequencing
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Fast characterization of segmental duplication structure in multiple genome assemblies.

Hamza Išerić1, Can Alkan2, Faraz Hach3,4

  • 1Department of Computer Science, University of Victoria, Victoria, BC, V8P 5C2, Canada.

Algorithms for Molecular Biology : AMB
|March 19, 2022
PubMed
Summary
This summary is machine-generated.

BISER is a new tool that rapidly detects segmental duplications (SDs) across multiple genomes. It identifies core duplicons, offering insights into evolutionary history up to 300 million years ago.

Keywords:
Fast alignmentGenome analysisSegmental duplicationsSequence decomposition

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Area of Science:

  • Genomics
  • Bioinformatics
  • Evolutionary Biology

Background:

  • High-quality genome assemblies necessitate advanced characterization of genomic architecture.
  • Segmental duplications (SDs) are key architectural elements driving genome plasticity and evolution.
  • Existing algorithms for SD detection are computationally intensive and impractical for large-scale, multi-genome analysis.

Purpose of the Study:

  • To develop a fast and accurate algorithm for characterizing SD structure across multiple genomes.
  • To identify elementary SDs and core duplicons that drive duplication formation.
  • To facilitate evolutionary analysis of genomic duplications.

Main Methods:

  • Introduction of BISER, a novel computational approach implemented in the Seq programming language.
  • Development of algorithms for rapid detection of SDs with low homology across multiple genomes.
  • Characterization of elementary SDs and identification of core duplicons.

Main Results:

  • BISER achieves significant speed-ups (7-33%) compared to existing tools for SD detection in multiple genomes.
  • The tool effectively identifies elementary SDs and core duplicons, enabling evolutionary tracing.
  • Demonstrated ability to trace duplication history up to 300 million years.

Conclusions:

  • BISER provides a computationally efficient and accurate method for multi-genome SD analysis.
  • The tool enhances our understanding of the evolutionary dynamics shaped by segmental duplications.
  • BISER is publicly available, promoting further research in comparative genomics and evolution.