Structure and dynamics of polyunsaturated hydrocarbon chains in lipid bilayers-significance for GPCR function

Chem Phys Lipids. 2008 May;153(1):64-75. doi: 10.1016/j.chemphyslip.2008.02.016. Epub 2008 Mar 13.

Abstract

This review summarizes results of our recent solid-state NMR investigations on polyunsaturated 18:0-22:6n3-PC/PE/PS and 18:0-22:5n6-PC bilayers. Data on structure and dynamics of the polyunsaturated docosahexaenoyl (DHAn3, 22:6n3) and docosapentaenoyl chains (DPAn6, 22:5n6), investigated at physiological conditions, are reported. Lipid-protein interaction was studied on reconstituted bilayers containing the G-protein coupled membrane receptor (GPCR) rhodopsin as well as on rod outer segment (ROS) disk membranes prepared from bovine retinas. Results reveal surprisingly rapid conformational transitions of polyunsaturated chains and existence of weakly specific interactions of DHAn3 with spatially distinct sites on rhodopsin.

Publication types

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

MeSH terms

  • Animals
  • Docosahexaenoic Acids / chemistry*
  • Docosahexaenoic Acids / metabolism
  • Fatty Acids, Unsaturated / chemistry*
  • Fatty Acids, Unsaturated / metabolism
  • Humans
  • Lipid Bilayers / chemistry*
  • Lipid Bilayers / metabolism
  • Rhodopsin / metabolism*
  • Rod Cell Outer Segment / metabolism*

Substances

  • Fatty Acids, Unsaturated
  • Lipid Bilayers
  • Docosahexaenoic Acids
  • Rhodopsin
  • docosapentaenoic acid