Drosophila Brahma complex remodels nucleosome organizations in multiple aspects

Aug 2, 2014Nucleic acids research

How the Brahma complex in fruit flies changes DNA packaging in different ways

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Abstract

Brm knockdown in Drosophila larvae results in a decrease in occupancy throughout the genome.

  • Nucleosome occupancy changes were observed globally, with a bias towards decreased occupancy.
  • Limited impacts on nucleosome position shifts were noted following Brm knockdown.
  • Changes in nucleosome fuzziness, a measure of positioning variability, were also detected.
  • Alterations in nucleosome dynamics were particularly enriched in promoter regions of genes.
  • Five distinct patterns of nucleosome reorganization were identified around the 5' ends of genes following Brm knockdown.
  • Changes in adjacent genes to Brahma-dependent remodeling regions are associated with developmental and morphological processes.

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Key numbers

872
Occupancy Change
Differentially expressed genes with >2-fold change after Brm knockdown.
89.6%
Shift
Percentage of total that shifted after Brm knockdown.
3758
Remodeling Regions Identified
Distinct remodeling regions enriched in promoter areas.

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