3h5j

LeuD_1-168 small subunit of isopropylmalate isomerase (Rv2987c) from mycobacterium tuberculosis

spinqualitylabelsall models 3h5j, resolution 1.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3h5j is a 2 chain structure with sequence from Mycobacterium tuberculosis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.2Å Ligands: EDO, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function LEUD_MYCTU Catalyzes the isomerization between 2-isopropylmalate and 3-isopropylmalate, via the formation of 2-isopropylmaleate. 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 The absence of the leucine biosynthesis pathway in humans makes the enzymes of this pathway in pathogenic bacteria such as Mycobacterium tuberculosis potential candidates for developing novel antibacterial drugs. One of these enzymes is isopropylmalate isomerase (IPMI). IPMI exists as a complex of two subunits: the large (LeuC) and the small (LeuD) subunit. The functional LeuCD complex catalyzes the stereospecific conversion reaction of alpha-isopropylmalate to beta-isopropylmalate. Three C-terminally truncated variants of LeuD have been analyzed by X-ray crystallography to resolutions of 2.0 A (LeuD_1-156), 1.2 A (LeuD_1-168), and 2.5 A (LeuD_1-186), respectively. The two most flexible parts of the structure are the regions of residues 30-37, the substrate discriminating loop, and of residues 70-74, the substrate binding loop. The three determined structures were also compared with the structures of other bacterial LeuDs. This comparison suggests the presence of two LeuD subfamilies. A model for the structure of the inactive enzyme complex has been obtained from solution X-ray scattering experiments. The crystal structure of LeuD was shown to be compatible with the solution X-ray scattering data from the small subunit. In contrast, the solution scattering results suggest that the large subunit LeuC and the LeuCD complex have overall shapes, which are radically different from the ones observed in the crystals of the functional homolog mitochondrial aconitase. Proteins 2010. (c) 2010 Wiley-Liss, Inc. Structural studies on the enzyme complex isopropylmalate isomerase (LeuCD) from Mycobacterium tuberculosis.,Manikandan K, Geerlof A, Zozulya AV, Svergun DI, Weiss MS Proteins. 2010 Aug 19. PMID:20938981 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Isopropylmalate dehydrogenase Isopropylmalate isomerase

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