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Related Concept Videos

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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Related Experiment Video

Updated: Jun 9, 2025

Hybrid De Novo Genome Assembly for the Generation of Complete Genomes of Urinary Bacteria using Short- and Long-read Sequencing Technologies
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GCI: a continuity inspector for complete genome assembly.

Quanyu Chen1,2,3, Chentao Yang4,5, Guojie Zhang1,2,6

  • 1International Institutes of Medicine, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu 322000, China.

Bioinformatics (Oxford, England)
|October 21, 2024
PubMed
Summary
This summary is machine-generated.

A new tool, Genome Continuity Inspector (GCI), evaluates genome assembly continuity at single-nucleotide resolution. GCI provides scores to assess how close an assembly is to the telomere-to-telomere (T2T) standard, addressing limitations of traditional metrics.

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Area of Science:

  • Genomics
  • Bioinformatics

Background:

  • Long-read sequencing advances enable high-quality genome assembly.
  • Telomere-to-telomere (T2T) gapless assembly is the new standard.
  • Existing metrics like N50 are insufficient for T2T evaluation.

Purpose of the Study:

  • To develop a universal standard for assessing T2T genome assembly quality.
  • To create a single-nucleotide resolution tool for evaluating genome continuity.
  • To address the need for accurate gaplessness evaluation in complete genome era.

Main Methods:

  • Introduced Genome Continuity Inspector (GCI) tool.
  • Utilized multiple aligners to map long reads to assemblies.
  • Incorporated curated mapping coverage of high-confidence read alignments.

Main Results:

  • GCI assesses genome assembly continuity at single-base resolution.
  • GCI evaluates proximity to T2T level assembly.
  • GCI identifies potential assembly issues and quantifies continuity with GCI scores.

Conclusions:

  • GCI provides a robust method for evaluating genome assembly continuity.
  • The tool aids in distinguishing truly T2T assemblies from near-T2T assemblies.
  • GCI offers a reliable metric for assessing complete genome quality.