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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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DNA sequencing is a fundamental technique that is routinely used in the biological sciences. This method can be applied to a range of questions at different scales - from the sequencing of a cloned DNA fragment or the study of a mutation in a gene up to whole-genome sequencing. However, despite the widespread use of sequencing today, it was not until 1977 that Fredrick Sanger and his collaborators developed the chain-termination method to decode DNA sequences. It relies on the separation of a...
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Related Experiment Video

Updated: Mar 19, 2026

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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Genome assembly from synthetic long read clouds.

Volodymyr Kuleshov1, Michael P Snyder2, Serafim Batzoglou3

  • 1Department of Computer Science, Stanford University Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA.

Bioinformatics (Oxford, England)
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Summary
This summary is machine-generated.

Architect is a new tool that simplifies genome assembly using synthetic long reads (SLR). It reduces sequencing needs and improves assembly contiguity for both genomes and metagenomes.

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Area of Science:

  • Genomics
  • Bioinformatics
  • Computational Biology

Background:

  • De novo genome assembly and metagenome reconstruction face challenges with current sequencing technologies.
  • Synthetic long read (SLR) technologies offer promise but are limited by high sequencing costs and difficulties in combining short and long reads.

Purpose of the Study:

  • Introduce Architect, a novel de novo scaffolder designed for SLR technologies.
  • Overcome limitations of existing assembly paradigms that struggle with combined short and long reads.

Main Methods:

  • Architect directly assembles genomes from SLR's underlying short reads, termed 'read clouds'.
  • Eliminates the need for a costly subassembly step required by previous strategies.

Main Results:

  • Achieves a 4- to 20-fold reduction in sequencing requirements.
  • Demonstrates a 5-fold increase in assembly contiguity for both genomic and metagenomic datasets.
  • Outperforms state-of-the-art assembly strategies that rely on fully subassembled long reads.

Conclusions:

  • Architect offers a more efficient and contiguous approach to genome and metagenome assembly using SLR data.
  • The method significantly reduces sequencing costs and complexity, broadening the applicability of SLR technologies.