2BXD image
Entry Detail
PDB ID:
2BXD
Title:
Human serum albumin complexed with warfarin
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2005-07-26
Release Date:
2005-09-22
Method Details:
Experimental Method:
Resolution:
3.05 Å
R-Value Free:
0.25
R-Value Work:
0.21
R-Value Observed:
0.21
Space Group:
P 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:SERUM ALBUMIN
Chain IDs:A, B
Chain Length:585
Number of Molecules:2
Biological Source:HOMO SAPIENS
Ligand Molecules
Primary Citation
Structural Basis of the Drug-Binding Specificity of Human Serum Albumin.
J.Mol.Biol. 353 38 ? (2005)
PMID: 16169013 DOI: 10.1016/J.JMB.2005.07.075

Abstact

Human serum albumin (HSA) is an abundant plasma protein that binds a remarkably wide range of drugs, thereby restricting their free, active concentrations. The problem of overcoming the binding affinity of lead compounds for HSA represents a major challenge in drug development. Crystallographic analysis of 17 different complexes of HSA with a wide variety of drugs and small-molecule toxins reveals the precise architecture of the two primary drug-binding sites on the protein, identifying residues that are key determinants of binding specificity and illuminating the capacity of both pockets for flexible accommodation. Numerous secondary binding sites for drugs distributed across the protein have also been identified. The binding of fatty acids, the primary physiological ligand for the protein, is shown to alter the polarity and increase the volume of drug site 1. These results clarify the interpretation of accumulated drug binding data and provide a valuable template for design efforts to modulate the interaction with HSA.

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