2w20

Structure of the catalytic domain of the native NanA sialidase from Streptococcus pneumoniae

spinqualitylabelsall models 2w20, resolution 1.49Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2w20 is a 2 chain structure with sequence from Strr6. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CL, GOL, MES Activity: Exo-alpha-sialidase, with EC number 3.2.1.18 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Streptococcus pneumoniae genomes encode three sialidases, NanA, NanB and NanC, which are key virulence factors that remove sialic acids from various glycoconjugates. The enzymes have potential as drug targets and also as vaccine candidates. The 115 kDa NanA is the largest of the three sialidases and is anchored to the bacterial membrane. Although recombinantly expressed full-length NanA was soluble, it failed to crystallize; therefore, a 56.5 kDa domain that retained full enzyme activity was subcloned. The purified enzyme was crystallized in 0.1 M MES pH 6.5, 30%(w/v) PEG 4000 using the sitting-drop vapour-diffusion method. Data were collected at 100 K to 2.5 A resolution from a crystal grown in the presence of the inhibitor 2-deoxy-2,3-dehydro-N-acetyl neuraminic acid. The crystal belongs to space group P2(1)2(1)2(1), with unit-cell parameters a = 49.2, b = 95.6, c = 226.6 A. The structure was solved by molecular replacement and refined to final R and R(free) factors of 0.246 and 0.298, respectively. Structure of the catalytic domain of Streptococcus pneumoniae sialidase NanA.,Xu G, Li X, Andrew PW, Taylor GL Acta Crystallogr Sect F Struct Biol Cryst Commun. 2008 Sep 1;64(Pt, 9):772-5. Epub 2008 Aug 20. PMID:18765901 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Neuraminidase 3D structures

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