1n3q

<StructureSection load='1n3q' size='340' side='right' caption='[[1n3q]], [[Resolution|resolution]] 2.20&Aring;' scene=''>

<table><tr><td colspan='2'>[[1n3q]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Pterocarpus_angolensis Pterocarpus angolensis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1N3Q OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1N3Q FirstGlance]. <br>

</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=GLC:ALPHA-D-GLUCOSE'>GLC</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=FRU:FRUCTOSE'>FRU</scene><br>

<tr><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=BDF:BETA-D-FRUCTOPYRANOSE'>BDF</scene></td></tr>

<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1n3o|1n3o]], [[1n3p|1n3p]]</td></tr>

<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1n3q FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1n3q OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1n3q RCSB], [http://www.ebi.ac.uk/pdbsum/1n3q PDBsum]</span></td></tr>

<table>

<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/n3/1n3q_consurf.spt"</scriptWhenChecked>

</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].

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== Publication Abstract from PubMed ==

The crystal structure of the Man/Glc-specific seed lectin from Pterocarpus angolensis was determined in complex with methyl-alpha-d-glucose, sucrose, and turanose. The carbohydrate binding site contains a classic Man/Glc type specificity loop. Its metal binding loop on the other hand is of the long type, different from what is observed in other Man/Glc-specific legume lectins. Glucose binding in the primary binding site is reminiscent of the glucose complexes of concanavalin A and lentil lectin. Sucrose is found to be bound in a conformation similar as seen in the binding site of lentil lectin. A direct hydrogen bond between Ser-137(OG) to Fru(O2) in Pterocarpus angolensis lectin replaces a water-mediated interaction in the equivalent complex of lentil lectin. In the turanose complex, the binding site of the first molecule in the asymmetric unit contains the alphaGlc1-3betaFruf form of furanose while the second molecule contains the alphaGlc1-3betaFrup form in its binding site.

Crystal structure of Pterocarpus angolensis lectin in complex with glucose, sucrose, and turanose.,Loris R, Imberty A, Beeckmans S, Van Driessche E, Read JS, Bouckaert J, De Greve H, Buts L, Wyns L J Biol Chem. 2003 May 2;278(18):16297-303. Epub 2003 Feb 19. PMID:12595543<ref>PMID:12595543</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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== References ==

<references/>

[[Category: Beeckmans, S.]]

[[Category: Bouckaert, J.]]

[[Category: Buts, L.]]

[[Category: Driessche, E Van.]]

[[Category: Greve, H De.]]

[[Category: Imberty, A.]]

[[Category: Loris, R.]]

[[Category: Read, J S.]]

[[Category: Wyns, L.]]

[[Category: Carbohydrate recognition]]

[[Category: Turanose]]