4ot2

Crystal Structure of Equine Serum Albumin in complex with Naproxen

spinqualitylabelsall models 4ot2, resolution 2.42Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4ot2 is a 1 chain structure with sequence from Equus caballus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ACT, MLI, NPS, SIN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function ALBU_HORSE Publication Abstract from PubMed Serum albumin, a protein naturally abundant in blood plasma, shows remarkable ligand binding properties of numerous endogenous and exogenous compounds. Most of serum albumin binding sites are able to interact with more than one class of ligands. Determining the protein-ligand interactions among mammalian serum albumins is essential for understanding the complexity of this transporter. We present three crystal structures of serum albumins in complexes with naproxen (NPS): bovine (BSA-NPS), equine (ESA-NPS), and leporine (LSA-NPS) determined to 2.58 A (C2), 2.42 A (P61 ), and 2.73 A (P21 21 21 ) resolutions, respectively. A comparison of the structurally investigated complexes with the analogous complex of human serum albumin (HSA-NPS) revealed surprising differences in the number and distribution of naproxen binding sites. Bovine and leporine serum albumins possess three NPS binding sites, but ESA has only two. All three complexes of albumins studied here have two common naproxen locations, but BSA and LSA differ in the third NPS binding site. None of these binding sites coincides with the naproxen location in the HSA-NPS complex, which was obtained in the presence of other ligands besides naproxen. Even small differences in sequences of serum albumins from various species, especially in the area of the binding pockets, influence the affinity and the binding mode of naproxen to this transport protein.Proteins 2014. (c) 2014 Wiley Periodicals, Inc. Structural studies of bovine, equine, and leporine serum albumin complexes with naproxen.,Bujacz A, Zielinski K, Sekula B Proteins. 2014 Apr 17. doi: 10.1002/prot.24583. PMID:24753230 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Albumin 3D structures

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