Identification of residues in chromodomain helicase DNA-binding protein 1 (Chd1) required for coupling ATP hydrolysis to nucleosome sliding

J Biol Chem. 2011 Dec 23;286(51):43984-43993. doi: 10.1074/jbc.M111.282970. Epub 2011 Oct 28.

Abstract

Chromatin remodelers are ATP-dependent machines responsible for directionally shifting nucleosomes along DNA. We are interested in defining which elements of the chromodomain helicase DNA-binding protein 1 (Chd1) remodeler are necessary and sufficient for sliding nucleosomes. This work focuses on the polypeptide segment that joins the ATPase motor to the C-terminal DNA-binding domain. We identify amino acid positions outside the ATPase motor that, when altered, dramatically reduce nucleosome sliding ability and yet have only ∼3-fold reduction in ATPase stimulation by nucleosomes. These residues therefore appear to play a role in functionally coupling ATP hydrolysis to nucleosome sliding, and suggest that the ATPase motor requires cooperation with external elements to slide DNA past the histone core.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Adenosine Triphosphatases / chemistry
  • Adenosine Triphosphate / chemistry*
  • Amino Acid Sequence
  • Chromatin / chemistry
  • Circular Dichroism
  • DNA-Binding Proteins / chemistry*
  • Gene Expression Regulation, Fungal
  • Hydrolysis
  • Molecular Sequence Data
  • Nucleosomes / chemistry*
  • Protein Binding
  • Protein Structure, Tertiary
  • Saccharomyces cerevisiae / genetics
  • Saccharomyces cerevisiae / metabolism
  • Saccharomyces cerevisiae Proteins / chemistry*
  • Sequence Homology, Amino Acid

Substances

  • CHD1 protein, S cerevisiae
  • Chromatin
  • DNA-Binding Proteins
  • Nucleosomes
  • Saccharomyces cerevisiae Proteins
  • Adenosine Triphosphate
  • Adenosine Triphosphatases