3aar

Crystal structure of Lp1NTPDase from Legionella pneumophila in complex with AMPPNP

spinqualitylabelsall models 3aar, resolution 1.65Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3aar is a 1 chain structure with sequence from Legionella pneumophila subsp. pneumophila str. Philadelphia 1. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.65Å Ligands: ANP Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q5ZUA2_LEGPH 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 Many pathogenic bacteria have sophisticated mechanisms to interfere with the mammalian immune response. These include the disruption of host extracellular ATP levels that, in humans, is tightly regulated by the nucleoside triphosphate diphosphohydrolase family (NTPDases). NTPDases are found almost exclusively in eukaryotes, the notable exception being their presence in some pathogenic prokaryotes. To address the function of bacterial NTPDases, we describe the structures of an NTPDase from the pathogen Legionella pneumophila (Lpg1905/Lp1NTPDase) in its apo state and in complex with the ATP analog AMPPNP and the subtype-specific NTPDase inhibitor ARL 67156. Lp1NTPDase is structurally and catalytically related to eukaryotic NTPDases and the structure provides a basis for NTPDase-specific inhibition. Furthermore, we demonstrate that the activity of Lp1NTPDase correlates directly with intracellular replication of Legionella within macrophages. Collectively, these findings provide insight into the mechanism of this enzyme and highlight its role in host-pathogen interactions. Crystal structure of a Legionella pneumophila ecto -triphosphate diphosphohydrolase, a structural and functional homolog of the eukaryotic NTPDases.,Vivian JP, Riedmaier P, Ge H, Le Nours J, Sansom FM, Wilce MC, Byres E, Dias M, Schmidberger JW, Cowan PJ, d'Apice AJ, Hartland EL, Rossjohn J, Beddoe T Structure. 2010 Feb 10;18(2):228-38. PMID:20159467 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Ectonucleoside triphosphate diphosphohydrolase

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