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1lu1

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Revision as of 07:51, 11 September 2015

THE STRUCTURE OF THE DOLICHOS BIFLORUS SEED LECTIN IN COMPLEX WITH THE FORSSMAN DISACCHARIDE

Structural highlights

1lu1 is a 1 chain structure with sequence from Dolichos biflorus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, , , ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Function

[LEC1_VIGUC] Metalloglycoprotein, containing Ca, Mg, Mn, and Zn and the carbohydrates galactose, glucosamine, mannose, and fucose. It agglutinates erythrocytes of blood group A1. Has a high preference for GalNAc over Gal.

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

The seed lectin (DBL) from the leguminous plant Dolichos biflorus has a unique specificity among the members of the legume lectin family because of its high preference for GalNAc over Gal. In addition, precipitation of blood group A+H substance by DBL is slightly better inhibited by a blood group A trisaccharide (GalNAc(alpha1-3)[Fuc(alpha1-2)]Gal) containing pentasaccharide, and about 40 times better by the Forssman disaccharide (GalNAc(alpha1-3)GalNAc) than by GalNAc. We report the crystal structures of the DBL-blood group A trisaccharide complex and the DBL-Forssman disaccharide complex.A comparison with the binding sites of Gal-binding legume lectins indicates that the low affinity of DBL for Gal is due to the substitution of a conserved aromatic residue by an aliphatic residue (Leu127). Binding studies with a Leu127Phe mutant corroborate these conclusions. DBL has a higher affinity for GalNAc because the N-acetyl group compensates for the loss of aromatic stacking in DBL by making a hydrogen bond with the backbone amide group of Gly103 and a hydrophobic contact with the side-chains of Trp132 and Tyr104. Some legume lectins possess a hydrophobic binding site that binds adenine and adenine-derived plant hormones, i.e. cytokinins. The exact function of this binding site is unknown, but adenine/cytokinin-binding legume lectins might be involved in storage of plant hormones or plant growth regulation. The structures of DBL in complex with adenine and of the dimeric stem and leaf lectin (DB58) from the same plant provide the first structural data on these binding sites. Both oligomers possess an unusual architecture, featuring an alpha-helix sandwiched between two monomers. In both oligomers, this alpha-helix is directly involved in the formation of the hydrophobic binding site. DB58 adopts a novel quaternary structure, related to the quaternary structure of the DBL heterotetramer, and brings the number of know legume lectin dimer types to four.

Carbohydrate binding, quaternary structure and a novel hydrophobic binding site in two legume lectin oligomers from Dolichos biflorus.,Hamelryck TW, Loris R, Bouckaert J, Dao-Thi MH, Strecker G, Imberty A, Fernandez E, Wyns L, Etzler ME J Mol Biol. 1999 Mar 5;286(4):1161-77. PMID:10047489^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Hamelryck TW, Loris R, Bouckaert J, Dao-Thi MH, Strecker G, Imberty A, Fernandez E, Wyns L, Etzler ME. Carbohydrate binding, quaternary structure and a novel hydrophobic binding site in two legume lectin oligomers from Dolichos biflorus. J Mol Biol. 1999 Mar 5;286(4):1161-77. PMID:10047489 doi:http://dx.doi.org/10.1006/jmbi.1998.2534

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1lu1"

@@ Line 2: / Line 2: @@
 <StructureSection load='1lu1' size='340' side='right' caption='[[1lu1]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1lu1]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Vigna_unguiculata_subsp._cylindrica Vigna unguiculata subsp. cylindrica]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1LU1 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1LU1 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1lu1]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Dolichos_biflorus Dolichos biflorus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1LU1 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1LU1 FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ADE:ADENINE'>ADE</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=A2G:N-ACETYL-2-DEOXY-2-AMINO-GALACTOSE'>A2G</scene>, <scene name='pdbligand=NGA:N-ACETYL-D-GALACTOSAMINE'>NGA</scene></td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1lu1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1lu1 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1lu1 RCSB], [http://www.ebi.ac.uk/pdbsum/1lu1 PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1lu1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1lu1 OCA], [http://pdbe.org/1lu1 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1lu1 RCSB], [http://www.ebi.ac.uk/pdbsum/1lu1 PDBsum]</span></td></tr>
 </table>
 == Function ==
-[[http://www.uniprot.org/uniprot/LEC1_DOLBI LEC1_DOLBI]] Metalloglycoprotein, containing Ca, Mg, Mn, and Zn and the carbohydrates galactose, glucosamine, mannose, and fucose. It agglutinates erythrocytes of blood group A1. Has a high preference for GalNAc over Gal.
+[[http://www.uniprot.org/uniprot/LEC1_VIGUC LEC1_VIGUC]] Metalloglycoprotein, containing Ca, Mg, Mn, and Zn and the carbohydrates galactose, glucosamine, mannose, and fucose. It agglutinates erythrocytes of blood group A1. Has a high preference for GalNAc over Gal.
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
@@ Line 26: / Line 26: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 1lu1" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>
 __TOC__
 </StructureSection>
-[[Category: Vigna unguiculata subsp. cylindrica]]
+[[Category: Dolichos biflorus]]
 [[Category: Bouckaert, J]]
 [[Category: Etzler, M E]]

1lu1

From Proteopedia

Revision as of 07:51, 11 September 2015

THE STRUCTURE OF THE DOLICHOS BIFLORUS SEED LECTIN IN COMPLEX WITH THE FORSSMAN DISACCHARIDE

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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