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Before a cell can divide, it must accurately replicate all of its chromosomes, including the DNA and its associated histone and non-histone proteins.  This process begins at numerous origins of replication during the S phase of the cell cycle in each of a cell’s chromosomes simultaneously. Certain nucleotides can act as origins of replication, but these sequences are not well defined - especially in complex, multi-cellular, eukaryotic species. The length of DNA that spans an origin...
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Chromosomics: Bridging the Gap between Genomes and Chromosomes.

Janine E Deakin1, Sally Potter2,3, Rachel O'Neill4

  • 1Institute for Applied Ecology, University of Canberra, Canberra, ACT 2617, Australia. Janine.Deakin@ecanberra.edu.au.

Genes
|August 23, 2019
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Summary

Integrating genome sequencing with cytogenetics and cell biology, termed "chromosomics," is crucial for understanding genome architecture and plasticity. This approach reveals how chromosome structure and interactions influence evolution and function.

Keywords:
centromerechromosome rearrangementscytogeneticsevolutiongenome biologygenome plasticitysex chromosomes

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Area of Science:

  • Genomics and Cell Biology
  • Integrative Genomics
  • Cytogenetics

Background:

  • Advances in DNA sequencing generate vast genomic data, yet fundamental questions about genome organization and function remain unanswered.
  • Sequence data alone does not reveal chromosome structure, positioning, interactions, or dynamic changes in response to stimuli.
  • The interplay between DNA sequence, chromosome structure, and function necessitates integrating genomic and cytogenetic data for a comprehensive understanding of genome plasticity.

Purpose of the Study:

  • To propose and define 'chromosomics' as an integrated approach combining genome sequencing, cytogenetics, and cell biology.
  • To highlight the potential of chromosomics to address fundamental questions in genome biology and evolution.
  • To identify challenges and future directions for advancing the field of chromosomics.

Main Methods:

  • Integration of genome sequencing data with cytogenetic and cell biology techniques.
  • Review of existing research demonstrating the utility of chromosomics.
  • Prospective analysis of future research questions addressable by chromosomics.

Main Results:

  • Chromosomics has already led to significant discoveries, such as identifying the sex-determining gene in eutherian mammals.
  • The approach offers potential to answer questions regarding chromosome rearrangements in speciation and the role of centromeres in genome plasticity.
  • Successful implementation requires addressing challenges in training and interdisciplinary collaboration.

Conclusions:

  • Chromosomics represents a paradigm shift for understanding genome architecture, plasticity, and evolution.
  • Further development requires enhanced training for cytogeneticists and closer integration of genomics, cytogenetics, cell biology, and bioinformatics.
  • Overcoming these challenges will unlock groundbreaking discoveries in genome evolution and function.