Structural similarity of a membrane protein in micelles and membranes

J Am Chem Soc. 2007 Jul 4;129(26):8078-9. doi: 10.1021/ja0728371. Epub 2007 Jun 13.


The anisotropic spin interactions measured for membrane proteins in weakly oriented micelles and in oriented lipid bilayers provide independent and potentially complementary high-resolution restraints for structure determination. Here we show that the membrane protein CHIF adopts a similar structure in lipid micelles and bilayers, allowing the restraints from micelle and bilayer samples to be combined in a complementary fashion to enhance the structural information. Back-calculation and assignment of the NMR spectrum of CHIF in oriented lipid bilayers, from the structure determined in micelles, provides additional restraints for structure determination as well as the global orientation of the protein in the membrane. The combined use of solution and solid-state NMR restraints also affords cross-validation for the structural analysis.

Publication types

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

MeSH terms

  • Cell Membrane / chemistry*
  • Membrane Proteins / chemistry*
  • Micelles*
  • Models, Molecular
  • Nuclear Magnetic Resonance, Biomolecular
  • Protein Conformation


  • Membrane Proteins
  • Micelles
  • corticosteroid hormone-induced factor