1mr5

Orthorhombic form of Trypanosoma cruzi trans-sialidase

spinqualitylabelsall models 1mr5, resolution 2.25Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1mr5 is a 1 chain structure with sequence from Trycr. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Related: 1ms0, 1ms1, 1ms3, 1ms4, 1ms5, 1ms8, 1ms9, 1mz5, 1mz6 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 Trans-sialidases (TS) are GPI-anchored surface enzymes expressed in specific developmental stages of trypanosome parasites like Trypanosoma cruzi, the etiologic agent of Chagas disease, and T. brucei, the causative agent of sleeping sickness. TS catalyzes the transfer of sialic acid residues from host to parasite glycoconjugates through a transglycosidase reaction that appears to be critical for T. cruzi survival and cell invasion capability. We report here the structure of the T. cruzi trans-sialidase, alone and in complex with sugar ligands. Sialic acid binding is shown to trigger a conformational switch that modulates the affinity for the acceptor substrate and concomitantly creates the conditions for efficient transglycosylation. The structure provides a framework for the structure-based design of novel inhibitors with potential therapeutic applications. The crystal structure and mode of action of trans-sialidase, a key enzyme in Trypanosoma cruzi pathogenesis.,Buschiazzo A, Amaya MF, Cremona ML, Frasch AC, Alzari PM Mol Cell. 2002 Oct;10(4):757-68. PMID:12419220 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Neuraminidase 3D structures

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