The role of cholesterol in membrane fusion

Chem Phys Lipids. 2016 Sep:199:136-143. doi: 10.1016/j.chemphyslip.2016.05.003. Epub 2016 May 11.

Abstract

Cholesterol modulates the bilayer structure of biological membranes in multiple ways. It changes the fluidity, thickness, compressibility, water penetration and intrinsic curvature of lipid bilayers. In multi-component lipid mixtures, cholesterol induces phase separations, partitions selectively between different coexisting lipid phases, and causes integral membrane proteins to respond by changing conformation or redistribution in the membrane. But, which of these often overlapping properties are important for membrane fusion?-Here we review a range of recent experiments that elucidate the multiple roles that cholesterol plays in SNARE-mediated and viral envelope glycoprotein-mediated membrane fusion.

Keywords: Cholesterol; Exocytosis; Fusion peptide; Fusion protein; Membrane fusion; SNARE; Viral envelope protein; Virus entry.

Publication types

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

MeSH terms

  • Animals
  • Cholesterol / metabolism*
  • Humans
  • Lipid Bilayers / metabolism
  • Membrane Fusion*
  • SNARE Proteins / metabolism
  • Virus Internalization

Substances

  • Lipid Bilayers
  • SNARE Proteins
  • Cholesterol