1v6i

Peanut lectin-lactose complex in acidic pH

spinqualitylabelsall models 1v6i, resolution 2.15Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1v6i is a 4 chain structure with sequence from Arachis hypogaea. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.15Å Ligands: CA, GAL, GLC, MN, PRD_900008 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function LECG_ARAHY D-galactose specific lectin. 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 Until recently, it has only been possible to grow crystals of peanut lectin when complexed with sugar ligands. It is now shown that it is possible to grow peanut lectin crystals at acidic pH in the presence of oligopeptides corresponding to a loop in the lectin molecule. Crystals have also been prepared in the presence of these peptides as well as lactose. Low-pH crystal forms of the lectin-lactose complex similar to those obtained at neutral pH have also been grown. Thus, crystals of peanut lectin grown under different environmental conditions, at two pH values with and without sugar bound to the lectin, are now available. They have been used to explore the plasticity and hydration of the molecule. A detailed comparison between different structures shows that the lectin molecule is sturdy and that the effect of changes in pH, ligand binding and environment on it is small. The region involving the curved front beta-sheet and the loops around the second hydrophobic core is comparatively rigid. The back beta-sheet involved in quaternary association, which exhibits considerable variability, is substantially flexible, as is the sugar-binding region. The numbers of invariant water molecules in the hydration shell are small and they are mainly involved in metal coordination or in stabilizing unusual structural features. Small consistent movements occur in the combining site upon sugar binding, although the site is essentially preformed. Structural plasticity of peanut lectin: an X-ray analysis involving variation in pH, ligand binding and crystal structure.,Kundhavai Natchiar S, Arockia Jeyaprakash A, Ramya TN, Thomas CJ, Suguna K, Surolia A, Vijayan M Acta Crystallogr D Biol Crystallogr. 2004 Feb;60(Pt 2):211-9. Epub 2004, Jan 23. PMID:14747696 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Galactose-binding lectin

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