Recruitment of the ATP-dependent chromatin remodeler dMi-2 to the transcribed region of active heat shock genes

Nucleic Acids Res. 2012 Jun;40(11):4879-91. doi: 10.1093/nar/gks178. Epub 2012 Feb 22.

Abstract

The ATP-dependent chromatin remodeler dMi-2 can play both positive and negative roles in gene transcription. Recently, we have shown that dMi-2 is recruited to the hsp70 gene in a heat shock-dependent manner, and is required to achieve high transcript levels. Here, we use chromatin immunoprecipitation sequencing (ChIP-Seq) to identify other chromatin regions displaying increased dMi-2 binding upon heat shock and to characterize the distribution of dMi-2 over heat shock genes. We show that dMi-2 is recruited to the body of at least seven heat shock genes. Interestingly, dMi-2 binding extends several hundred base pairs beyond the polyadenylation site into the region where transcriptional termination occurs. We find that dMi-2 does not associate with the entire nucleosome-depleted hsp70 locus 87A. Rather, dMi-2 binding is restricted to transcribed regions. Our results suggest that dMi-2 distribution over active heat shock genes are determined by transcriptional activity.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adenosine Triphosphatases / metabolism*
  • Animals
  • Autoantigens / metabolism*
  • Cells, Cultured
  • Drosophila Proteins / metabolism*
  • Drosophila melanogaster / genetics
  • Drosophila melanogaster / metabolism
  • Genetic Loci
  • HSP70 Heat-Shock Proteins / genetics
  • Heat-Shock Proteins / genetics*
  • Heat-Shock Response / genetics*
  • Transcription, Genetic*

Substances

  • Autoantigens
  • Drosophila Proteins
  • HSP70 Heat-Shock Proteins
  • Heat-Shock Proteins
  • Mi-2 protein, Drosophila
  • Adenosine Triphosphatases