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Related Experiment Videos

What is behind "centromere repositioning"?

Ingo Schubert1

  • 1Leibniz Institute of Plant Genetics and Crop Pant Research (IPK), D-06466, Gatersleben, Germany. schubert@ipk-gatersleben.de.

Chromosoma
|April 30, 2018
PubMed
Summary
This summary is machine-generated.

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Evolutionary repositioning of centromeres on eukaryotic chromosomes is increasingly observed across diverse species. This review explores recent findings on centromere repositioning mechanisms and de novo centromere formation, addressing current knowledge gaps.

Area of Science:

  • Genetics and Evolutionary Biology
  • Molecular and Cellular Biology
  • Genomics and Chromosome Research

Background:

  • Monocentric eukaryotic chromosomes typically maintain conserved gene sequences and markers.
  • Centromere repositioning, a significant evolutionary event, is frequently observed in primates, equidae, marsupials, and plants.
  • The underlying mechanisms driving centromere repositioning and de novo centromere formation remain largely unexplained.

Purpose of the Study:

  • To review recent reports on centromere repositioning events in eukaryotic evolution.
  • To investigate and discuss potential molecular mechanisms underlying centromere repositioning.
  • To address unresolved questions regarding chromosome evolution and centromere dynamics.

Main Methods:

  • Literature review of recent studies on centromere repositioning.
Keywords:
CenH3 loadingCentromere repositioningDSB mis-repairDicentric/acentric chromosomesPeri-/paracentric inversionde novo centromere formation

Related Experiment Videos

  • Analysis of case studies across various taxa including primates, equidae, marsupials, and plants.
  • Discussion of proposed mechanisms for de novo centromere formation and repositioning.

    • Main Results:

    • Evidence for recurrent centromere repositioning across diverse eukaryotic lineages.
    • Identification of potential genetic and epigenetic factors influencing centromere plasticity.
    • Highlighting the complexity and varied nature of mechanisms involved in centromere evolution.

    Conclusions:

    • Centromere repositioning is a significant evolutionary force shaping chromosome structure.
    • Further research is needed to fully elucidate the mechanisms of centromere repositioning and de novo formation.
    • Understanding these processes is crucial for comprehending eukaryotic genome evolution and stability.