3enr

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[[Image:3enr.jpg|left|200px]]
 
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==ZINC-CALCIUM CONCANAVALIN A AT PH 6.15==
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The line below this paragraph, containing "STRUCTURE_3enr", creates the "Structure Box" on the page.
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<StructureSection load='3enr' size='340' side='right'caption='[[3enr]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[3enr]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Canavalia_ensiformis Canavalia ensiformis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3ENR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3ENR FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.4&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
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{{STRUCTURE_3enr| PDB=3enr | SCENE= }}
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3enr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3enr OCA], [https://pdbe.org/3enr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3enr RCSB], [https://www.ebi.ac.uk/pdbsum/3enr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3enr ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/CONA_CANEN CONA_CANEN] D-mannose specific lectin.
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/en/3enr_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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=3enr ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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The crystal structures of cadmium/cadmium and zinc/calcium concanavalin A (con A) at pH 5.0 and pH 6.15, respectively, were determined. The structure of cadmium/cadmium con A confirms that the secondary Cd(2+)-binding site S3 is empty at pH 5. The metal-binding sites S1 and S2 are only very slightly affected by the substitution with cadmium. On the other hand, S1 and S2 and most of the protein surface of zinc/calcium con A at pH 6.15 differ from other fully metal-bound and carbohydrate-free structures. Most of these structural differences at the protein surface are a result of the interplay between metal binding, protonation and crystal packing. This interplay is expressed by relative rotations and translations of the con A units in alternative crystal packings and participation in space-group conversions inside crystals in situ. The particular crystal packing of zinc/calcium con A creates a novel zinc-binding site S4. The Zn(2+) ion in S4 ligates two aspartates from one tetramer and a histidine from a symmetry-related tetramer.
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'''ZINC-CALCIUM CONCANAVALIN A AT PH 6.15'''
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Zinc/calcium- and cadmium/cadmium-substituted concanavalin A: interplay of metal binding, pH and molecular packing.,Bouckaert J, Loris R, Wyns L Acta Crystallogr D Biol Crystallogr. 2000 Dec;56(Pt 12):1569-76. PMID:11092923<ref>PMID:11092923</ref>
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==Overview==
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The crystal structures of cadmium/cadmium and zinc/calcium concanavalin A (con A) at pH 5.0 and pH 6.15, respectively, were determined. The structure of cadmium/cadmium con A confirms that the secondary Cd(2+)-binding site S3 is empty at pH 5. The metal-binding sites S1 and S2 are only very slightly affected by the substitution with cadmium. On the other hand, S1 and S2 and most of the protein surface of zinc/calcium con A at pH 6.15 differ from other fully metal-bound and carbohydrate-free structures. Most of these structural differences at the protein surface are a result of the interplay between metal binding, protonation and crystal packing. This interplay is expressed by relative rotations and translations of the con A units in alternative crystal packings and participation in space-group conversions inside crystals in situ. The particular crystal packing of zinc/calcium con A creates a novel zinc-binding site S4. The Zn(2+) ion in S4 ligates two aspartates from one tetramer and a histidine from a symmetry-related tetramer.
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==About this Structure==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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3ENR is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Canavalia_ensiformis Canavalia ensiformis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3ENR OCA].
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</div>
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<div class="pdbe-citations 3enr" style="background-color:#fffaf0;"></div>
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==Reference==
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==See Also==
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Zinc/calcium- and cadmium/cadmium-substituted concanavalin A: interplay of metal binding, pH and molecular packing., Bouckaert J, Loris R, Wyns L, Acta Crystallogr D Biol Crystallogr. 2000 Dec;56(Pt 12):1569-76. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11092923 11092923]
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*[[Concanavalin 3D structures|Concanavalin 3D structures]]
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== References ==
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<references/>
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__TOC__
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</StructureSection>
[[Category: Canavalia ensiformis]]
[[Category: Canavalia ensiformis]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Bouckaert, J.]]
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[[Category: Bouckaert J]]
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[[Category: Loris, R.]]
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[[Category: Loris R]]
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[[Category: Wyns, L.]]
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[[Category: Wyns L]]
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[[Category: Concanavalin some]]
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[[Category: Lectin]]
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[[Category: Metal binding]]
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[[Category: Ph]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 22:00:52 2008''
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Current revision

ZINC-CALCIUM CONCANAVALIN A AT PH 6.15

PDB ID 3enr

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