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New page: left|200px<br /><applet load="1cjp" size="450" color="white" frame="true" align="right" spinBox="true" caption="1cjp, resolution 2.78Å" /> '''CONCANAVALIN A COMPL...
 
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[[Image:1cjp.gif|left|200px]]<br /><applet load="1cjp" size="450" color="white" frame="true" align="right" spinBox="true"
caption="1cjp, resolution 2.78&Aring;" />
'''CONCANAVALIN A COMPLEX WITH 4'-METHYLUMBELLIFERYL-ALPHA-D-GLUCOPYRANOSIDE'''<br />


==Overview==
==CONCANAVALIN A COMPLEX WITH 4'-METHYLUMBELLIFERYL-ALPHA-D-GLUCOPYRANOSIDE==
Concanavalin A (Con A) is the best known plant lectin, with important, biological properties arising from its specific saccharide-binding, ability. Its exact biological role still remains unknown. The complex of, Con A with 4'-methylumbelliferyl-alpha-D-glucopyranoside (alpha-MUG) has, been crystallized in space group P2(1) with cell dimensions a = 81.62 A, b, = 128.71 A, c = 82.23 A, and beta = 118.47 degrees. X-ray diffraction, intensities to 2.78 A have been collected. The structure of the complex, was solved by molecular replacement and refined by simulated annealing, methods to a crystallographic R-factor value of 0.182 and a free-R-factor, value of 0.216. The asymmetric unit contains four subunits arranged as a, tetramer, with approximate 222 symmetry. A saccharide molecule is bound in, the sugar-binding site at the surface of each subunit, with the nonsugar, (aglycon) part adopting a different orientation in each subunit. The, aglycon orientation, although probably determined by packing of tetramers, in the crystal lattice, helps to characterize the orientation of the, saccharide in the sugar-binding pocket. The structure is the best, determined alpha-D-glucoside:Con A complex to date and the hydrogen, bonding network in the saccharide-binding site can be described with some, confidence and compared with that of the alpha-D-mannosides.
<StructureSection load='1cjp' size='340' side='right'caption='[[1cjp]], [[Resolution|resolution]] 2.78&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1cjp]] is a 4 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=1CJP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1CJP FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.78&#8491;</td></tr>
<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=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=MUG:4-METHYLUMBELLIFERYL-ALPHA-D-GLUCOSE'>MUG</scene></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=1cjp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1cjp OCA], [https://pdbe.org/1cjp PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1cjp RCSB], [https://www.ebi.ac.uk/pdbsum/1cjp PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1cjp ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CONA_CANEN CONA_CANEN] D-mannose specific lectin.
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/cj/1cjp_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </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/main_output.php?pdb_ID=1cjp ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Concanavalin A (Con A) is the best known plant lectin, with important biological properties arising from its specific saccharide-binding ability. Its exact biological role still remains unknown. The complex of Con A with 4'-methylumbelliferyl-alpha-D-glucopyranoside (alpha-MUG) has been crystallized in space group P2(1) with cell dimensions a = 81.62 A, b = 128.71 A, c = 82.23 A, and beta = 118.47 degrees. X-ray diffraction intensities to 2.78 A have been collected. The structure of the complex was solved by molecular replacement and refined by simulated annealing methods to a crystallographic R-factor value of 0.182 and a free-R-factor value of 0.216. The asymmetric unit contains four subunits arranged as a tetramer, with approximate 222 symmetry. A saccharide molecule is bound in the sugar-binding site at the surface of each subunit, with the nonsugar (aglycon) part adopting a different orientation in each subunit. The aglycon orientation, although probably determined by packing of tetramers in the crystal lattice, helps to characterize the orientation of the saccharide in the sugar-binding pocket. The structure is the best determined alpha-D-glucoside:Con A complex to date and the hydrogen bonding network in the saccharide-binding site can be described with some confidence and compared with that of the alpha-D-mannosides.


==About this Structure==
The crystal structure of the complex of concanavalin A with 4'-methylumbelliferyl-alpha-D-glucopyranoside.,Hamodrakas SJ, Kanellopoulos PN, Pavlou K, Tucker PA J Struct Biol. 1997 Feb;118(1):23-30. PMID:9087912<ref>PMID:9087912</ref>
1CJP is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Canavalia_ensiformis Canavalia ensiformis] with MUG, MN and CA as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1CJP OCA].


==Reference==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
The crystal structure of the complex of concanavalin A with 4'-methylumbelliferyl-alpha-D-glucopyranoside., Hamodrakas SJ, Kanellopoulos PN, Pavlou K, Tucker PA, J Struct Biol. 1997 Feb;118(1):23-30. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=9087912 9087912]
</div>
<div class="pdbe-citations 1cjp" style="background-color:#fffaf0;"></div>
 
==See Also==
*[[Concanavalin 3D structures|Concanavalin 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Canavalia ensiformis]]
[[Category: Canavalia ensiformis]]
[[Category: Single protein]]
[[Category: Large Structures]]
[[Category: Hamodrakas, S.J.]]
[[Category: Hamodrakas SJ]]
[[Category: Kanellopoulos, P.N.]]
[[Category: Kanellopoulos PN]]
[[Category: Tucker, P.A.]]
[[Category: Tucker PA]]
[[Category: CA]]
[[Category: MN]]
[[Category: MUG]]
[[Category: legume lectin]]
 
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