ATP utilization and RNA conformational rearrangement by DEAD-box proteins

Annu Rev Biophys. 2012;41:247-67. doi: 10.1146/annurev-biophys-050511-102243. Epub 2012 Feb 13.

Abstract

RNA helicase enzymes catalyze the in vivo folding and conformational re-arrangement of RNA. DEAD-box proteins (DBPs) make up the largest family of RNA helicases and are found across all phyla. DBPs are molecular motor proteins that utilize chemical energy in cycles of ATP binding, hydrolysis, and product release to perform mechanical work resulting in reorganization of cellular RNAs. DBPs contain a highly conserved motor domain helicase core. Auxiliary domains, enzymatic adaptations, and regulatory partner proteins contribute to the diversity of DBP function throughout RNA metabolism. In this review we focus on the current understanding of the DBP ATP utilization mechanism in rearranging and unwinding RNA structures. We discuss DBP structural properties, kinetic pathways, and thermodynamic features of nucleotide-dependent interactions with RNA. We highlight recent advances in the DBP field derived from biochemical and molecular biophysical investigations aimed at developing a quantitative mechanistic understanding of DBP molecular motor function.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.
  • Review

MeSH terms

  • Adenosine Triphosphate / genetics
  • Adenosine Triphosphate / metabolism
  • Animals
  • DEAD-box RNA Helicases / chemistry
  • DEAD-box RNA Helicases / genetics
  • DEAD-box RNA Helicases / metabolism*
  • Humans
  • Kinetics
  • Molecular Motor Proteins / chemistry
  • Molecular Motor Proteins / genetics
  • Molecular Motor Proteins / metabolism
  • Nucleic Acid Conformation
  • RNA / chemistry
  • RNA / genetics
  • RNA / metabolism*
  • Thermodynamics

Substances

  • Molecular Motor Proteins
  • RNA
  • Adenosine Triphosphate
  • DEAD-box RNA Helicases