Structure and function of archaeal prefoldin, a co-chaperone of group II chaperonin

Front Biosci (Landmark Ed). 2010 Jan 1;15:708-17. doi: 10.2741/3641.

Abstract

Molecular chaperones are key cellular components involved in the maintenance of protein homeostasis and other unrelated functions. Prefoldin is a chaperone that acts as a co-factor of group II chaperonins in eukaryotes and archaea. It assists proper folding of protein by capturing nonnative proteins and delivering it to the group II chaperonin. Eukaryotic prefoldin is a multiple subunit complex composed of six different polypeptide chains. Archaeal prefoldin, on the other hand, is a heterohexameric complex composed of two alpha and four beta subunits, and forms a double beta barrel assembly with six long coiled coils protruding from it like a jellyfish with six tentacles. Based on the structural information of the archaeal prefoldin, substrate recognition and prefoldin-chaperonin binding mechanisms have been investigated. In this paper, we review a series of studies on the molecular mechanisms of archaeal PFD function. Particular emphasis will be placed on the molecular structures revealed by X-ray crystallography and molecular dynamics induced by binding to nonnative protein substrates.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Archaeal Proteins / chemistry*
  • Archaeal Proteins / genetics
  • Archaeal Proteins / metabolism
  • Group II Chaperonins / chemistry*
  • Group II Chaperonins / genetics
  • Group II Chaperonins / metabolism
  • Models, Molecular
  • Molecular Chaperones / chemistry*
  • Molecular Chaperones / genetics
  • Molecular Chaperones / metabolism
  • Mutation
  • Protein Binding
  • Protein Multimerization
  • Protein Structure, Quaternary
  • Protein Structure, Tertiary
  • Pyrococcus horikoshii / genetics
  • Pyrococcus horikoshii / metabolism*

Substances

  • Archaeal Proteins
  • Molecular Chaperones
  • prefoldin
  • Group II Chaperonins