1h9z
From Proteopedia
HUMAN SERUM ALBUMIN COMPLEXED WITH MYRISTIC ACID AND THE R-(+) ENANTIOMER OF WARFARIN
Overview
Human serum albumin (HSA) is an abundant transport protein found in plasma that binds a wide variety of drugs in two primary binding sites (I and II) and can have a significant impact on their pharmacokinetics. We have determined the crystal structures at 2.5 A-resolution of HSA-myristate complexed with the R-(+) and S-(-) enantiomers of warfarin, a widely used anticoagulant that binds to the protein with high affinity. The structures confirm that warfarin binds to drug site I (in subdomain IIA) in the presence of fatty acids and reveal the molecular details of the protein-drug interaction. The two enantiomers of warfarin adopt very similar conformations when bound to the protein and make many of the same specific contacts with amino acid side chains at the binding site, thus accounting for the relative lack of stereospecificity of the HSA-warfarin interaction. The conformation of the warfarin binding pocket is significantly altered upon binding of fatty acids, and this can explain the observed enhancement of warfarin binding to HSA at low levels of fatty acid.
About this Structure
1H9Z is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Crystal structure analysis of warfarin binding to human serum albumin: anatomy of drug site I., Petitpas I, Bhattacharya AA, Twine S, East M, Curry S, J Biol Chem. 2001 Jun 22;276(25):22804-9. Epub 2001 Apr 2. PMID:11285262 Page seeded by OCA on Fri May 2 18:37:15 2008
