2ya5

Crystal structure of Streptococcus pneumoniae NanA (TIGR4) in complex with sialic acid

spinqualitylabelsall models 2ya5, resolution 2.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2ya5 is a 2 chain structure with sequence from Strpn. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CL, FMT, SIA Related: 2vvz, 2ya7, 2ya4, 2ya8, 2ya6 Activity: Exo-alpha-sialidase, with EC number 3.2.1.18 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed The human pathogen Streptococcus pneumoniae is the major cause of bacterial meningitis, respiratory tract infection, septicemia, and otitis media. The bacterium expresses neuraminidase (NA) proteins that contribute to pathogenesis by cleaving sialic acids from host glycoconjugates, thereby enhancing biofilm formation and colonization. Recent in vivo experiments have shown that antiviral compounds, widely used in clinics and designed to inhibit influenza NA, significantly reduce biofilm formation and nasopharyngeal colonization of S. pneumoniae in mice. Here, we present the structural basis for the beneficial effect of these compounds against pneumococcal infection. Crystal structures of pneumococcal NanA in complex with zanamivir and oseltamivir carboxylate are discussed, correlated with measured inhibitory constants K(i), and compared with the binding modes of the inhibitors in the viral enzyme. Inhibitor structures show for the first time how clinically approved anti-influenza compounds interact with an NA of the human pathogen S. pneumoniae and give a rational explanation for their antibacterial effects. Structural Basis for Streptococcus pneumoniae NanA Inhibition by Influenza Antivirals Zanamivir and Oseltamivir Carboxylate.,Gut H, Xu G, Taylor GL, Walsh MA J Mol Biol. 2011 Jun 17;409(4):496-503. Epub 2011 Apr 14. PMID:21514303 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Neuraminidase 3D structures

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