2x0f

STRUCTURE OF WSAF IN COMPLEX WITH DTDP-BETA-L-RHA

spinqualitylabelsall models 2x0f, resolution 2.55Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2x0f is a 2 chain structure with sequence from Geobacillus stearothermophilus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: GOL, TRH Related: 2x0e, 2x0d Resources: FirstGlance, OCA, RCSB, PDBsum 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 Carbohydrate polymers are medically and industrially important. The S-layer of many Gram-positive organisms comprises protein and carbohydrate polymers and forms an almost paracrystalline array on the cell surface. Not only is this array important for the bacteria but it has potential application in the manufacture of commercially important polysaccharides and glycoconjugates as well. The S-layer glycoprotein glycan from Geobacillus stearothermophilus NRS 2004/3a is mainly composed of repeating units of three rhamnose sugars linked by alpha-1,3-, alpha-1,2-, and beta-1,2-linkages. The formation of the beta-1,2-linkage is catalysed by the enzyme WsaF. The rational use of this system is hampered by the fact that WsaF and other enzymes in the pathway share very little homology to other enzymes. We report the structural and biochemical characterisation of WsaF, the first such rhamnosyltransferase to be characterised. Structural work was aided by the surface entropy reduction method. The enzyme has two domains, the N-terminal domain, which binds the acceptor (the growing rhamnan chain), and the C-terminal domain, which binds the substrate (dTDP-beta-l-rhamnose). The structure of WsaF bound to dTDP and dTDP-beta-l-rhamnose coupled to biochemical analysis identifies the residues that underlie catalysis and substrate recognition. We have constructed and tested by site-directed mutagenesis a model for acceptor recognition. Structural basis of substrate binding in WsaF, a rhamnosyltransferase from Geobacillus stearothermophilus.,Steiner K, Hagelueken G, Messner P, Schaffer C, Naismith JH J Mol Biol. 2010 Mar 26;397(2):436-47. Epub 2010 Jan 22. PMID:20097205 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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