5tix

Schistosoma haematobium (Blood Fluke) Sulfotransferase/R-oxamniquine Complex

spinqualitylabelsall models 5tix, resolution 1.78Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5tix is a 2 chain structure with sequence from Schistosoma haematobium. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.78Å Ligands: A3P, OQR Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0A094ZWQ2_SCHHA Publication Abstract from PubMed The antischistosomal prodrug oxamniquine is activated by a sulfotransferase (SULT) in the parasitic flatworm Schistosoma mansoni. Of the three main human schistosome species, only S. mansoni is sensitive to oxamniquine therapy despite the presence of SULT orthologs in Schistosoma hematobium and Schistosoma japonicum The reason for this species-specific drug action has remained a mystery for decades. Here we present the crystal structures of S. hematobium and S. japonicum SULTs, including S. hematobium SULT in complex with oxamniquine. We also examined the activity of the three enzymes in vitro; surprisingly, all three are active toward oxamniquine, yet we observed differences in catalytic efficiency that implicate kinetics as the determinant for species-specific toxicity. These results provide guidance for designing oxamniquine derivatives to treat infection caused by all species of schistosome to combat emerging resistance to current therapy. Structural and enzymatic insights into species-specific resistance to schistosome parasite drug therapy.,Taylor AB, Roberts KM, Cao X, Clark NE, Holloway SP, Donati E, Polcaro CM, Pica-Mattoccia L, Tarpley RS, McHardy SF, Cioli D, LoVerde PT, Fitzpatrick PF, Hart PJ J Biol Chem. 2017 Jul 7;292(27):11154-11164. doi: 10.1074/jbc.M116.766527. Epub, 2017 May 23. PMID:28536265 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Sulfotransferase 3D structures

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