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==Xenopus laevis malectin complexed with maltose (Glcalpha1-4Glc)==
==Xenopus laevis malectin complexed with maltose (Glcalpha1-4Glc)==
<StructureSection load='2kr2' size='340' side='right' caption='[[2kr2]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''>
<StructureSection load='2kr2' size='340' side='right'caption='[[2kr2]]' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[2kr2]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/African_clawed_frog African clawed frog]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2KR2 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2KR2 FirstGlance]. <br>
<table><tr><td colspan='2'>[[2kr2]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Xenopus_laevis Xenopus laevis]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2KR2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2KR2 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BGC:BETA-D-GLUCOSE'>BGC</scene>, <scene name='pdbligand=GLC:ALPHA-D-GLUCOSE'>GLC</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2jwp|2jwp]], [[2k46|2k46]]</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BGC:BETA-D-GLUCOSE'>BGC</scene>, <scene name='pdbligand=GLC:ALPHA-D-GLUCOSE'>GLC</scene>, <scene name='pdbligand=PRD_900018:beta-maltose'>PRD_900018</scene></td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">mlec, mlec-A ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=8355 African clawed frog])</td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2kr2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2kr2 OCA], [https://pdbe.org/2kr2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2kr2 RCSB], [https://www.ebi.ac.uk/pdbsum/2kr2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2kr2 ProSAT]</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=2kr2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2kr2 OCA], [http://pdbe.org/2kr2 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2kr2 RCSB], [http://www.ebi.ac.uk/pdbsum/2kr2 PDBsum]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/MLECA_XENLA MLECA_XENLA]] Carbohydate-binding protein with a strong ligand preference for Glc2-N-glycan. May play a role in the early steps of protein N-glycosylation. Can bind di- or higher oligomers but not monomers of glucose, including maltose, maltotriose, maltotetraose, maltoheptaose, nigerose, kojibose, cellobiose and isomaltose, although based on their subcellular locations, these are unlikely to all be physiological ligands.<ref>PMID:18524852</ref>
[https://www.uniprot.org/uniprot/MLECA_XENLA MLECA_XENLA] Carbohydate-binding protein with a strong ligand preference for Glc2-N-glycan. May play a role in the early steps of protein N-glycosylation. Can bind di- or higher oligomers but not monomers of glucose, including maltose, maltotriose, maltotetraose, maltoheptaose, nigerose, kojibose, cellobiose and isomaltose, although based on their subcellular locations, these are unlikely to all be physiological ligands.<ref>PMID:18524852</ref>  
== 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/kr/2kr2_consurf.spt"</scriptWhenChecked>
     <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/kr/2kr2_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
     <text>to colour the structure by Evolutionary Conservation</text>
   </jmolCheckbox>
   </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/chain_selection.php?pdb_ID=2ata ConSurf].
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2kr2 ConSurf].
<div style="clear:both"></div>
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The endoplasmic reticulum malectin is a highly conserved protein in the animal kingdom that has no counterpart so far in lower organisms. We recently determined the structure of its conserved domain and found a highly selective binding to Glc(2)Man(9)GlcNAc(2), an intermediate of N-glycosylation. In our quest for putative ligands during the initial characterization of the protein, we noticed that the malectin domain is highly specific for diglucosides but quite tolerant towards the linkage of the glucosidic bond. To understand the molecular requirements for the observed promiscuity of the malectin domain, here we analyze the binding to a range of diglucosides through comparison of the protein chemical shift perturbation patterns and the saturation transfer difference spectra of the ligands including two maltose-mimicking drugs. A comparison of the maltose-bound structure of the malectin domain with the complex of the native ligand nigerose reveals why malectin is able to tolerate such a diversity of ligands.
Analysis of the specific interactions between the lectin domain of malectin and diglucosides.,Schallus T, Feher K, Sternberg U, Rybin V, Muhle-Goll C Glycobiology. 2010 Aug;20(8):1010-20. Epub 2010 Apr 26. PMID:20466650<ref>PMID:20466650</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 2kr2" style="background-color:#fffaf0;"></div>
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: African clawed frog]]
[[Category: Large Structures]]
[[Category: Feher, K]]
[[Category: Xenopus laevis]]
[[Category: Muhle-Goll, C]]
[[Category: Feher K]]
[[Category: Schallus, T]]
[[Category: Muhle-Goll C]]
[[Category: Carbohydrate binding protein]]
[[Category: Schallus T]]
[[Category: Carbohydrate metabolism]]
[[Category: Endoplasmic reticulum]]
[[Category: Glycoprotein]]
[[Category: Lectin/carbohydrate]]
[[Category: Membrane]]
[[Category: Transmembrane]]

Latest revision as of 06:47, 1 May 2024

Xenopus laevis malectin complexed with maltose (Glcalpha1-4Glc)

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