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Related Concept Videos

Evolutionary Relationships through Genome Comparisons02:54

Evolutionary Relationships through Genome Comparisons

Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes02:16

Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes

The present-day mitochondrial and chloroplast genomes have retained some of the characteristics of their ancestral prokaryotes and also have acquired new attributes during their evolution within eukaryotic cells. Like prokaryotic genomes, mitochondrial and chloroplast genomes neither bind with histone-like proteins nor show complex packaging into chromosome-like structures, as observed in eukaryotes. Unlike mitotic cell divisions observed in eukaryotic cells, mitochondria and chloroplasts...
Modern Molecular Taxonomy01:29

Modern Molecular Taxonomy

Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
Genome Annotation and Assembly03:36

Genome Annotation and Assembly

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.
Comparing Copy Number Variations and SNPs02:26

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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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Genomics

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Updated: Jun 1, 2026

Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations
08:03

Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations

Published on: December 7, 2021

An alternative approach to multiple genome comparison.

Alban Mancheron1, Raluca Uricaru, Eric Rivals

  • 1LIRMM - CNRS, Université Montpellier 2 - CC 477, 161, rue Ada, 34095 Montpellier Cedex 5, France.

Nucleic Acids Research
|June 8, 2011
PubMed
Summary
This summary is machine-generated.

We developed a new genome comparison method using similarity segmentation, enabling faster and more flexible analysis. This approach identified 92 new genes in Ehrlichia ruminantium and found potential orthologs for strain-specific genes.

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An Integrated Approach for Microprotein Identification and Sequence Analysis
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Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations
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Published on: December 7, 2021

An Integrated Approach for Microprotein Identification and Sequence Analysis
09:37

An Integrated Approach for Microprotein Identification and Sequence Analysis

Published on: July 12, 2022

Area of Science:

  • Genomics
  • Bioinformatics
  • Comparative Genomics

Background:

  • Genome comparison is vital for annotation and regulatory motif identification.
  • Current methods lack efficiency and flexibility for diverse genome sizes and organizations.
  • Innovative approaches are needed for comprehensive genome analysis.

Purpose of the Study:

  • To introduce a novel, efficient, and flexible genome comparison method based on similarity segmentation.
  • To address limitations of existing genome comparison tools.
  • To facilitate automated genome annotation and identification of conserved/specific genomic regions.

Main Methods:

  • Genome comparison framed as a segmentation problem solvable in near-linear time.
  • Development of the qod software tool for efficient genome comparison.
  • Application to analyze three strains of Ehrlichia ruminantium.

Main Results:

  • Identification of 92 novel genes in Ehrlichia ruminantium.
  • Discovery of potential orthologs for genes previously considered strain-specific.
  • Demonstration of automated annotation transfer between genomes and contigs.
  • Capability to handle unfinished genomes due to disregard for block order.

Conclusions:

  • The similarity segmentation approach offers an efficient and flexible alternative for genome comparison.
  • The qod tool facilitates accurate genome annotation and comparative analysis.
  • This method advances the study of bacterial genomics, particularly for pathogens like Ehrlichia ruminantium.