5hj9

Crystal structure of Leishmania mexicana arginase in complex with inhibitor ABHPE

spinqualitylabelsall models 5hj9, resolution 1.28Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5hj9 is a 1 chain structure with sequence from Leishmania mexicana. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.28Å Ligands: EDO, GOL, MN, PGE, SO4, X7A Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q6TUJ5_LEIME Publication Abstract from PubMed Leishmania arginase is a potential drug target for the treatment of leishmaniasis because this binuclear manganese metalloenzyme initiates de novo polyamine biosynthesis by catalyzing the hydrolysis of L-arginine to generate L-ornithine and urea. The product L-ornithine subsequently undergoes decarboxylation to yield putrescine, which in turn is utilized for spermidine biosynthesis. Polyamines such as spermidine are essential for the growth and survival of the parasite, so inhibition of enzymes in the polyamine-biosynthetic pathway comprises an effective strategy for treating parasitic infections. To this end, two X-ray crystal structures of L. mexicana arginase complexed with alpha,alpha-disubstituted boronic amino-acid inhibitors based on the molecular scaffold of 2-(S)-amino-6-boronohexanoic acid are now reported. Structural comparisons with human and parasitic arginase complexes reveal interesting differences in the binding modes of the additional alpha-substituents, i.e. the D side chains, of these inhibitors. Subtle differences in the three-dimensional contours of the outer active-site rims among arginases from different species lead to different conformations of the D side chains and thus different inhibitor-affinity trends. The structures suggest that it is possible to maintain affinity while fine-tuning intermolecular interactions of the D side chain of alpha,alpha-disubstituted boronic amino-acid inhibitors in the search for isozyme-specific and species-specific arginase inhibitors. Crystal structures of Leishmania mexicana arginase complexed with alpha,alpha-disubstituted boronic amino-acid inhibitors.,Hai Y, Christianson DW Acta Crystallogr F Struct Biol Commun. 2016 Apr;72(Pt 4):300-6. doi:, 10.1107/S2053230X16003630. Epub 2016 Mar 16. PMID:27050264 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Arginase 3D structures

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