Interaction studies between human alpha-tocopherol transfer protein and nitric oxide donor tocopherol analogues with LDL-protective activity

Bioorg Med Chem. 2009 Dec 15;17(24):8143-8. doi: 10.1016/j.bmc.2009.10.046. Epub 2009 Oct 29.

Abstract

Nitric oxide-releasing alpha-tocopherol mimetics with LDL-protective activity were designed to maintain the tocopherol substructure necessary for its biochemical recognition by alpha-tocopherol transfer protein. In order to study the molecular interactions to alpha-TTP, theoretical binding studies by means of docking techniques and experimental binding assays, using a fluorescent probe, were performed. Furoxanyl-tocopherol-hybrid analogs 7 and 9 have the best ability to bind to alpha-TTP suggesting that they could be incorporated to LDL in vivo to further release nitric oxide and prevent oxidative modifications.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Substitution
  • Antioxidants / metabolism*
  • Cholesterol, LDL / chemistry
  • Cholesterol, LDL / metabolism
  • Humans
  • Molecular Sequence Data
  • Nitric Oxide / biosynthesis*
  • Nitric Oxide / metabolism*
  • Nitric Oxide Donors / metabolism*
  • Protein Binding
  • Protein Conformation
  • Structure-Activity Relationship
  • Tocopherols / metabolism*
  • Vitamin E / metabolism*
  • alpha-Tocopherol*

Substances

  • Antioxidants
  • Cholesterol, LDL
  • Nitric Oxide Donors
  • Vitamin E
  • Nitric Oxide
  • alpha-Tocopherol
  • Tocopherols