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1caw

From Proteopedia

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[[Image:1caw.jpg|left|200px]]<br /><applet load="1caw" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="1caw, resolution 2.6&Aring;" />
 
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'''DETERMINATION OF THREE CRYSTAL STRUCTURES OF CANAVALIN BY MOLECULAR REPLACEMENT'''<br />
 
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==Overview==
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==DETERMINATION OF THREE CRYSTAL STRUCTURES OF CANAVALIN BY MOLECULAR REPLACEMENT==
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Canavalin, the major reserve protein of the jack bean, was obtained in four different crystal forms. From the structure determined by multiple isomorphous replacement in a hexagonal unit cell, the structures of three other crystals were determined by molecular replacement. In two cases, the rhombohedral and cubic crystals, placement was facilitated by coincidence of threefold molecular symmetry with crystallographic operators. In the orthorhombic crystal the canavalin trimer was the asymmetric unit. The rhombohedral, orthorhombic and cubic crystal structures were subsequently refined using a combination of several approaches with resulting R factors of 0.194, 0.185 and 0.211 at resolutions of 2.6, 2.6 and 2.3 A, respectively. Variation in the conformation of the molecule from crystal to crystal was small with an r.m.s. deviation in Calpha positions of 0.89 A. Packing is quite different among crystal forms but lattice interactions appear to play little role in the conformation of the molecule. Greatest variations in mean position are for those residues that also exhibit the greatest thermal motion. Crystal contacts in all crystals are mediated almost exclusively by hydrophilic side chains, and three to six intermolecular salt bridges per protein subunit are present in each case.
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<StructureSection load='1caw' size='340' side='right'caption='[[1caw]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
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== Structural highlights ==
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==About this Structure==
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<table><tr><td colspan='2'>[[1caw]] 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=1CAW OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1CAW FirstGlance]. <br>
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1CAW is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences 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=1CAW OCA].
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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]] 2.6&#8491;</td></tr>
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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=1caw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1caw OCA], [https://pdbe.org/1caw PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1caw RCSB], [https://www.ebi.ac.uk/pdbsum/1caw PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1caw ProSAT]</span></td></tr>
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==Reference==
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</table>
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Determination of three crystal structures of canavalin by molecular replacement., Ko TP, Ng JD, Greenwood A, McPherson A, Acta Crystallogr D Biol Crystallogr. 1993 Sep 1;49(Pt 5):478-89. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=15299507 15299507]
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== Function ==
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[https://www.uniprot.org/uniprot/CANA_CANEN CANA_CANEN] Seed storage protein.
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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/ca/1caw_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=1caw ConSurf].
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<div style="clear:both"></div>
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__TOC__
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</StructureSection>
[[Category: Canavalia ensiformis]]
[[Category: Canavalia ensiformis]]
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[[Category: Protein complex]]
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[[Category: Large Structures]]
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[[Category: Day, J.]]
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[[Category: Day J]]
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[[Category: Greenwood, A.]]
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[[Category: Greenwood A]]
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[[Category: Ko, T-P.]]
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[[Category: Ko T-P]]
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[[Category: McPherson, A.]]
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[[Category: McPherson A]]
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[[Category: Ng, J D.]]
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[[Category: Ng JD]]
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[[Category: seed storage protein]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:04:11 2008''
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Current revision

DETERMINATION OF THREE CRYSTAL STRUCTURES OF CANAVALIN BY MOLECULAR REPLACEMENT

PDB ID 1caw

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