Stealth carriers for low-resolution structure determination of membrane proteins in solution

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

Structural studies of membrane proteins remain a great experimental challenge. Functional reconstitution into artificial nanoscale bilayer disc carriers that mimic the native bilayer environment allows the handling of membrane proteins in solution. This enables the use of small-angle scattering techniques for fast and reliable structural analysis. The difficulty with this approach is that the carrier discs contribute to the measured scattering intensity in a highly nontrivial fashion, making subsequent data analysis challenging. Here, an elegant solution to circumvent the intrinsic complexity brought about by the presence of the carrier disc is presented. In combination with small-angle neutron scattering (SANS) and the D2O/H2O-based solvent contrast-variation method, it is demonstrated that it is possible to prepare specifically deuterated carriers that become invisible to neutrons in 100% D2O at the length scales relevant to SANS. These `stealth' carrier discs may be used as a general platform for low-resolution structural studies of membrane proteins using well established data-analysis tools originally developed for soluble proteins.

Detaljer

Författare
  • Selma Maric
  • Nicholas Skar-Gislinge
  • Søren Midtgaard
  • Mikkel B Thygesen
  • Jürgen Schiller
  • Henrich Frielinghaus
  • Martine Moulin
  • Michael Haertlein
  • V Trevor Forsyth
  • Thomas Günther Pomorski
  • Lise Arleth
Externa organisationer
  • University of Copenhagen
  • Leipzig University
  • Jülich Research Centre
  • Institut Laue Langevin
Forskningsområden

Nyckelord

Originalspråkengelska
Sidor (från-till)317-28
Antal sidor12
TidskriftActa Crystallographica. Section D: Biological Crystallography
Volym70
Utgåva nummerPt 2
StatusPublished - 2014 feb
PublikationskategoriForskning
Peer review utfördJa
Externt publiceradJa