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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...
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Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
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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

Genome-wide approaches to determining origin distribution.

Jean-Charles Cadoret1, Marie-Noëlle Prioleau

  • 1Institut Jacques Monod, Centre National de la Recherche Scientifique, Université Paris 7, Paris, 75013, France.

Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology
|November 19, 2009
PubMed
Summary

Genomic mapping reveals replication origins associate with gene regulatory elements in mammals. This finding aids understanding DNA replication initiation and its regulation in complex genomes.

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Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
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Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
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Area of Science:

  • Molecular Biology
  • Genetics
  • Cell Biology

Background:

  • Genome integrity relies on precise DNA replication during each cell cycle.
  • Understanding DNA replication initiation is crucial for comprehending genome regulation in complex genomes.
  • Mammalian replication origins, the starting points for DNA synthesis, are key to this process.

Purpose of the Study:

  • To review recent large-scale mappings of replication origins in human and mouse cells.
  • To explore the association between replication origins and transcriptional regulatory elements.
  • To discuss implications for understanding DNA replication initiation and regulation.

Main Methods:

  • Large-scale genomic mapping of DNA replication origins.
  • Comparative analysis of replication origin locations and transcriptional regulatory elements.
  • Review of recent findings from human and mouse cell studies.

Main Results:

  • Replication origins show a strong association with transcriptional regulatory elements in mammalian genomes.
  • Gene deserts, regions lacking replication origins, present questions regarding their replication, especially under disrupted conditions.
  • These findings provide insights into identifying key regulatory factors for DNA replication initiation.

Conclusions:

  • Large-scale mapping of replication origins has significantly advanced the understanding of replication initiation.
  • The association between replication origins and regulatory elements highlights a potential regulatory mechanism.
  • Future research prospects include identifying key factors and understanding replication in origin-poor regions.