2dtw: Difference between revisions
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==Crystal Structure of basic winged bean lectin in complex with 2Me-O-D-Galactose== | ==Crystal Structure of basic winged bean lectin in complex with 2Me-O-D-Galactose== | ||
<StructureSection load='2dtw' size='340' side='right' caption='[[2dtw]], [[Resolution|resolution]] 2.40Å' scene=''> | <StructureSection load='2dtw' size='340' side='right'caption='[[2dtw]], [[Resolution|resolution]] 2.40Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[2dtw]] is a 4 chain structure with sequence from [ | <table><tr><td colspan='2'>[[2dtw]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Psophocarpus_tetragonolobus Psophocarpus tetragonolobus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2DTW OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2DTW FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=2GS:2-O-METHYL-ALPHA-D-GALACTOPYRANOSE'>2GS</scene>, <scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand= | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.4Å</td></tr> | ||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=2GS:2-O-METHYL-ALPHA-D-GALACTOPYRANOSE'>2GS</scene>, <scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=FUC:ALPHA-L-FUCOSE'>FUC</scene>, <scene name='pdbligand=FUL:BETA-L-FUCOSE'>FUL</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=NDG:2-(ACETYLAMINO)-2-DEOXY-A-D-GLUCOPYRANOSE'>NDG</scene></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2dtw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2dtw OCA], [https://pdbe.org/2dtw PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2dtw RCSB], [https://www.ebi.ac.uk/pdbsum/2dtw PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2dtw ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
[ | [https://www.uniprot.org/uniprot/LEC1_PSOTE LEC1_PSOTE] Lectin. | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
Check<jmol> | Check<jmol> | ||
<jmolCheckbox> | <jmolCheckbox> | ||
<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/dt/2dtw_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/dt/2dtw_consurf.spt"</scriptWhenChecked> | ||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/ | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
</jmolCheckbox> | </jmolCheckbox> | ||
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</div> | </div> | ||
<div class="pdbe-citations 2dtw" style="background-color:#fffaf0;"></div> | <div class="pdbe-citations 2dtw" style="background-color:#fffaf0;"></div> | ||
==See Also== | |||
*[[Agglutinin 3D structures|Agglutinin 3D structures]] | |||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Large Structures]] | |||
[[Category: Psophocarpus tetragonolobus]] | [[Category: Psophocarpus tetragonolobus]] | ||
[[Category: Katiyar | [[Category: Katiyar S]] | ||
[[Category: Kulkarni | [[Category: Kulkarni KA]] | ||
[[Category: Suguna | [[Category: Suguna K]] | ||
[[Category: Surolia | [[Category: Surolia A]] | ||
[[Category: Vijayan | [[Category: Vijayan M]] | ||
Latest revision as of 03:52, 21 November 2024
Crystal Structure of basic winged bean lectin in complex with 2Me-O-D-GalactoseCrystal Structure of basic winged bean lectin in complex with 2Me-O-D-Galactose
Structural highlights
FunctionLEC1_PSOTE 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 PubMedThe crystal structure of the complexes of basic winged-bean lectin with galactose, 2-methoxygalactose, N-acetylgalactosamine and methyl-alpha-N-acetylgalactosamine have been determined. Lectin-sugar interactions involve four hydrogen bonds and a stacking interaction in all of the complexes. In addition, an N-H...O hydrogen bond involving the hydroxyl group at C2 exists in the galactose and 2-methoxygalactose complexes. An additional hydrophobic interaction involving the methyl group in the latter leads to the higher affinity of the methyl derivative. In the lectin-N-acetylgalactosamine complex the N-H...O hydrogen bond is lost, but a compensatory hydrogen bond is formed involving the O atom of the acetamido group. In addition, the CH(3) moiety of the acetamido group is involved in hydrophobic interactions. Consequently, the 2-methyl and acetamido derivatives of galactose have nearly the same affinity for the lectin. The methyl group alpha-linked to the galactose takes part in additional hydrophobic interactions. Therefore, methyl-alpha-N-acetylgalactosamine has a higher affinity than N-acetylgalactosamine for the lectin. The structures of basic winged-bean lectin-sugar complexes provide a framework for examining the relative affinity of galactose and galactosamine for the lectins that bind to them. The complexes also lead to a structural explanation for the blood-group specificity of basic winged-bean lectin. Structural basis for the carbohydrate-specificity of basic winged-bean lectin and its differential affinity for Gal and GalNAc.,Kulkarni KA, Katiyar S, Surolia A, Vijayan M, Suguna K Acta Crystallogr D Biol Crystallogr. 2006 Nov;62(Pt 11):1319-24. Epub 2006, Oct 18. PMID:17057334[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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