6CI6 image
Entry Detail
PDB ID:
6CI6
Title:
Crystal structure of equine serum albumin in complex with nabumetone
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
2018-02-23
Release Date:
2018-03-07
Method Details:
Experimental Method:
Resolution:
2.80 Å
R-Value Free:
0.25
R-Value Work:
0.18
R-Value Observed:
0.18
Space Group:
P 61
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Serum albumin
Chain IDs:A
Chain Length:583
Number of Molecules:1
Biological Source:Equus caballus
Primary Citation
Albumin-Based Transport of Nonsteroidal Anti-Inflammatory Drugs in Mammalian Blood Plasma.
J.Med.Chem. ? ? ? (2020)
PMID: 32469516 DOI: 10.1021/acs.jmedchem.0c00225

Abstact

Every day, hundreds of millions of people worldwide take nonsteroidal anti-inflammatory drugs (NSAIDs), often in conjunction with multiple other medications. In the bloodstream, NSAIDs are mostly bound to serum albumin (SA). We report the crystal structures of equine serum albumin complexed with four NSAIDs (ibuprofen, ketoprofen, etodolac, and nabumetone) and the active metabolite of nabumetone (6-methoxy-2-naphthylacetic acid, 6-MNA). These compounds bind to seven drug-binding sites on SA. These sites are generally well-conserved between equine and human SAs, but ibuprofen binds to both SAs in two drug-binding sites, only one of which is common. We also compare the binding of ketoprofen by equine SA to binding of it by bovine and leporine SAs. Our comparative analysis of known SA complexes with FDA-approved drugs clearly shows that multiple medications compete for the same binding sites, indicating possibilities for undesirable physiological effects caused by drug-drug displacement or competition with common metabolites. We discuss the consequences of NSAID binding to SA in a broader scientific and medical context, particularly regarding achieving desired therapeutic effects based on an individual's drug regimen.

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