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Modeling meiotic chromosomes indicates a size dependent contribution of telomere clustering and chromosome rigidity to homologue juxtaposition
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Penfold, Christopher A., Brown, Paul E., Lawrence, Neil (Neil D.) and Goldman, Alastair S. H. (2012) Modeling meiotic chromosomes indicates a size dependent contribution of telomere clustering and chromosome rigidity to homologue juxtaposition. PLoS Computational Biology, Vol.8 (No.5). e1002496. doi:10.1371/journal.pcbi.1002496 ISSN 1553-7358.
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WRAP_Brown_journal.pcbi.1002496.pdf - Published Version Download (1714Kb) | Preview |
Official URL: http://dx.doi.org/10.1371/journal.pcbi.1002496
Abstract
Meiosis is the cell division that halves the genetic component of diploid cells to form gametes or spores. To achieve this, meiotic cells undergo a radical spatial reorganisation of chromosomes. This reorganisation is a prerequisite for the pairing of parental homologous chromosomes and the reductional division, which halves the number of chromosomes in daughter cells. Of particular note is the change from a centromere clustered layout (Rabl configuration) to a telomere clustered conformation (bouquet stage). The contribution of the bouquet structure to homologous chromosome pairing is uncertain. We have developed a new in silico model to represent the chromosomes of Saccharomyces cerevisiae in space, based on a worm-like chain model constrained by attachment to the nuclear envelope and clustering forces. We have asked how these constraints could influence chromosome layout, with particular regard to the juxtaposition of homologous chromosomes and potential nonallelic, ectopic, interactions. The data support the view that the bouquet may be sufficient to bring short chromosomes together, but the contribution to long chromosomes is less. We also find that persistence length is critical to how much influence the bouquet structure could have, both on pairing of homologues and avoiding contacts with heterologues. This work represents an important development in computer modeling of chromosomes, and suggests new explanations for why elucidating the functional significance of the bouquet by genetics has been so difficult.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QH Natural history > QH426 Genetics | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Research Centres > Warwick Systems Biology Centre | ||||
Library of Congress Subject Headings (LCSH): | Meiosis -- Computer simulation, Saccharomyces cerevisiae -- Computer simulation, Chromosomes -- Computer simulation | ||||
Journal or Publication Title: | PLoS Computational Biology | ||||
Publisher: | Public Library of Science | ||||
ISSN: | 1553-7358 | ||||
Official Date: | 2012 | ||||
Dates: |
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Volume: | Vol.8 | ||||
Number: | No.5 | ||||
Page Range: | e1002496 | ||||
DOI: | 10.1371/journal.pcbi.1002496 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Date of first compliant deposit: | 22 December 2015 | ||||
Date of first compliant Open Access: | 22 December 2015 | ||||
Funder: | Biotechnology and Biological Sciences Research Council (Great Britain) (BBSRC) |
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