2xbl

Crystal structure of GmhA from Burkholderia pseudomallei in complex with product

spinqualitylabelsall models 2xbl, resolution 1.62Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2xbl is a 4 chain structure with sequence from Burps. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: M7P, PEG, PG4, PGE, ZN Related: 2x3y Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [GMHA_BURPS] Catalyzes the isomerization of sedoheptulose 7-phosphate in D-glycero-D-manno-heptose 7-phosphate. 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 Heptoses are found in the surface polysaccharides of most bacteria, contributing to structures that are essential for virulence and antibiotic resistance. Consequently, the biosynthetic enzymes for these sugars are attractive targets for novel antibiotics. The best characterized biosynthetic enzyme is GmhA, which catalyzes the conversion of sedoheptulose-7-phosphate into D-glycero-D-manno-heptopyranose-7-phosphate, the first step in the biosynthesis of heptose. Here, the structure of GmhA from Burkholderia pseudomallei is reported. This enzyme contains a zinc ion at the heart of its active site: this ion stabilizes the active, closed form of the enzyme and presents coordinating side chains as a potential acid and base to drive catalysis. A complex with the product demonstrates that the enzyme retains activity in the crystal and thus suggests that the closed conformation is catalytically relevant and is an excellent target for the development of therapeutics. A revised mechanism for the action of GmhA is postulated on the basis of this structure and the activity of B. pseudomallei GmhA mutants. The structure of sedoheptulose-7-phosphate isomerase from Burkholderia pseudomallei reveals a zinc binding site at the heart of the active site.,Harmer NJ J Mol Biol. 2010 Jul 16;400(3):379-92. Epub 2010 May 4. PMID:20447408 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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