2uve

Structure of Yersinia enterocolitica Family 28 Exopolygalacturonase

spinqualitylabelsall models 2uve, resolution 2.19Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2uve is a 2 chain structure with sequence from Yersinia enterocolitica. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.19Å Ligands: ACT, NI, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function O68975_YEREN 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 Family 28 glycoside hydrolases (polygalacturonases) are found in organisms across the plant, fungal and bacterial kingdoms, where they are central to diverse biological functions such as fruit ripening, biomass recycling and plant pathogenesis. The structures of several polygalacturonases have been reported; however, all of these enzymes utilize an endo-mode of digestion, which generates a spectrum of oligosaccharide products with varying degrees of polymerization. The structure of a complementary exo-acting polygalacturonase and an accompanying explanation of the molecular determinants for its specialized activity have been noticeably lacking. We present the structure of an exopolygalacturonase from Yersinia enterocolitica, YeGH28 in a native form (solved to 2.19 A resolution) and a digalacturonic acid product complex (solved to 2.10 A resolution). The activity of YeGH28 is due to inserted stretches of amino acid residues that transform the active site from the open-ended channel observed in the endopolygalacturonases to a closed pocket that restricts the enzyme to the exclusive attack of the non-reducing end of oligogalacturonide substrates. In addition, YeGH28 possesses a fused FN3 domain with unknown function, the first such structure described in pectin active enzymes. The structural basis for exopolygalacturonase activity in a family 28 glycoside hydrolase.,Abbott DW, Boraston AB J Mol Biol. 2007 May 18;368(5):1215-22. Epub 2007 Mar 6. PMID:17397864 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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