Format

Send to

Choose Destination
See comment in PubMed Commons below
Biophys J. 2007 Feb 1;92(3):920-7. Epub 2006 Oct 27.

Cholesterol surrogates: a comparison of cholesterol and 16:0 ceramide in POPC bilayers.

Author information

1
Department of Computer Science, Purdue University, West Lafayette, Indiana, USA.

Abstract

Experimental evidence indicates that, under some circumstances, "surrogate" molecules may play the same role as cholesterol in ordering membrane lipids. The simplest molecule in this class is Ceramide. In this article, we describe atomic-level molecular dynamics simulations designed to shed light on this phenomenon. We run simulations of hydrated phosphoryl-oleoyl phosphatidylcholine (POPC) bilayers containing cholesterol, and containing ceramide, in concentrations ranging from 5% to 33%. We also perform a simulation of a pure POPC bilayer to verify the simulation force fields against experimental structural data for POPC. Our simulation data are in good agreement with experimental data for the partial molecular volumes, areas, form factors, and order parameters. These simulations suggest that ceramide and cholesterol have a very similar effect on the POPC bilayer, although ceramide is less effective in inducing order in the bilayer compared with cholesterol at the same concentrations.

PMID:
17071659
PMCID:
PMC1779968
DOI:
10.1529/biophysj.106.095034
[Indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science Icon for PubMed Central
    Loading ...
    Support Center