Assembly of lipids and proteins into lipoprotein particles

Amy Y. Shih, Anton Arkhipov, Peter L. Freddolino, Stephen G. Sligar, Klaus Schulten

Research output: Contribution to journalArticlepeer-review

Abstract

The self-assembly of reconstituted discoidal high-density lipoproteins, known as nanodiscs, was studied using coarse-grained molecular dynamics and small-angle X-ray scattering. In humans, high-density lipoprotein particles transport cholesterol in the blood and facilitate the removal of excess cholesterol from the body. Native high-density lipoprotein exhibits a wide variety of shapes and sizes, forming lipid-free/poor, nascent discoidal, and mature spherical particles. Little is known about how these lipoprotein particles assemble and transform from one state to another. Multiple 10 μs coarse-grained simulations reveal the assembly of discoidal high-density lipoprotein particles from disordered protein-lipid complexes. Small-angle X-ray scattering patterns were calculated from the final assembled structures and compared with experimental measurements carried out for this study to verify the accuracy of the coarse-grained simulations. Results show that hydrophobic interactions assemble, within several microseconds, the amphipathic helical proteins and lipids into roughly discoidal particles, while the proteins assume a final approximate double-belt configuration on a slower time scale.

Original languageEnglish (US)
Pages (from-to)11095-11104
Number of pages10
JournalJournal of Physical Chemistry B
Volume111
Issue number38
DOIs
StatePublished - Sep 27 2007

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

Fingerprint

Dive into the research topics of 'Assembly of lipids and proteins into lipoprotein particles'. Together they form a unique fingerprint.

Cite this