Molecular recognition of fatty acids by peroxisome proliferator- activated receptors

H. Eric Xu, Millard H. Lambert, Valerie G. Montana, Derek J. Parks, Steven G. Blanchard, Peter J. Brown, Daniel D. Sternbach, Jürgen M. Lehmann, G. Bruce Wisely, Timothy M. Willson, Steven A. Kliewer, Michael V. Milburn

Research output: Contribution to journalArticlepeer-review

976 Scopus citations


The peroxisome proliferator-activated receptors (PPARs) are nuclear receptors for fatty acids (FAs) that regulate glucose and lipid homeostasis. We report the crystal structure of the PPARδ ligand-binding domain (LBD) bound to either the FA eicosapentaenoic acid (EPA) or the synthetic fib rate GW2433. The carboxylic acids of EPA and GW2433 interact directly with the activation function 2 (AF-2) helix. The hydrophobic tail of EPA adopts two distinct conformations within the large hydrophobic cavity. GW2433 occupies essentially the same space as EPA bound in both conformations. These structures provide molecular insight into the propensity for PPARs to interact with a variety of synthetic and natural compounds, including FAs that vary in both chain length and degree of saturation.

Original languageEnglish (US)
Pages (from-to)397-403
Number of pages7
JournalMolecular cell
Issue number3
StatePublished - Mar 1999

ASJC Scopus subject areas

  • Molecular Biology
  • Cell Biology


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