2b7y
From Proteopedia
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Fava Bean Lectin-Glucose Complex
Overview
The three-dimensional structure of favin, the glucose- and mannose-binding, lectin of Vicia faba (vetch, broad bean), has been determined at a, resolution of 2.8 angstroms by molecular replacement. The crystals contain, specifically bound glucose and provide the first high-resolution view of, specific saccharide binding in a leguminous lectin. The structure is, similar to those of concanavalin A (Con A) and green pea lectin;, differences from Con A show that minimal changes are needed to accommodate, the cyclic permutation in amino acid sequence between the two molecules., The molecule is an ellipsoidal dimer dominated by extensive beta, structures. Each protomer contains binding sites for two divalent metal, ions (Mn2+ and Ca2+) and a specific saccharide. Glucose is bound by favin, in a cleft in the molecular surface and has noncovalent contacts primarily, with two peptide loops, one of which contains several metal ion ligands., The specific carbohydrate-binding site is similar to that of Con A in, location and general peptide folding, despite several differences in, specific amino acid residues.
About this Structure
2B7Y is a Protein complex structure of sequences from Vicia faba with GLC, NDG, MN and CA as ligands. Full crystallographic information is available from OCA.
Reference
Three-dimensional structure of favin: saccharide binding-cyclic permutation in leguminous lectins., Reeke GN Jr, Becker JW, Science. 1986 Nov 28;234(4780):1108-11. PMID:3775378
Page seeded by OCA on Wed Nov 21 08:38:03 2007
