2cau: Difference between revisions
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< | ==CANAVALIN FROM JACK BEAN== | ||
<StructureSection load='2cau' size='340' side='right'caption='[[2cau]], [[Resolution|resolution]] 2.10Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[2cau]] is a 1 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=2CAU OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2CAU 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]] 2.1Å</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=2cau FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2cau OCA], [https://pdbe.org/2cau PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2cau RCSB], [https://www.ebi.ac.uk/pdbsum/2cau PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2cau ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/CANA_CANEN CANA_CANEN] Seed storage protein. | |||
== 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/ca/2cau_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=2cau ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The structure of canavalin was refined to 2.1 and 2.0 A resolution in cubic and hexagonal crystals of space group P2(1)3 and P6(3), respectively. The threefold molecular symmetry is expressed in the symmetry of both crystals, where each identical subunit is an asymmetric unit. The canavalin subunit consists of two very similar domains, each comprised of a core subdomain having Swiss-roll topology with a loop subdomain that contains helices. The refined canavalin models resolved the discrepancy in amino-acid registers of the secondary-structural elements compared with phaseolin. The presence of strand Z in both domains of canavalin was confirmed and a new helix in the loop between strands A and B of each domain was observed. The models were analyzed in terms of the duplicated vicilin domains. Three strictly conserved residues, two glycines and a proline, were identified. The similarity between entire vicilin molecules is greater than that between separate domains of canavalin and phaseolin. Homology modeling of the sucrose-binding protein (SBP) from soybean showed a plausible trimeric assembly of subunits similar to that of vicilins. | The structure of canavalin was refined to 2.1 and 2.0 A resolution in cubic and hexagonal crystals of space group P2(1)3 and P6(3), respectively. The threefold molecular symmetry is expressed in the symmetry of both crystals, where each identical subunit is an asymmetric unit. The canavalin subunit consists of two very similar domains, each comprised of a core subdomain having Swiss-roll topology with a loop subdomain that contains helices. The refined canavalin models resolved the discrepancy in amino-acid registers of the secondary-structural elements compared with phaseolin. The presence of strand Z in both domains of canavalin was confirmed and a new helix in the loop between strands A and B of each domain was observed. The models were analyzed in terms of the duplicated vicilin domains. Three strictly conserved residues, two glycines and a proline, were identified. The similarity between entire vicilin molecules is greater than that between separate domains of canavalin and phaseolin. Homology modeling of the sucrose-binding protein (SBP) from soybean showed a plausible trimeric assembly of subunits similar to that of vicilins. | ||
The refined structure of canavalin from jack bean in two crystal forms at 2.1 and 2.0 A resolution.,Ko TP, Day J, McPherson A Acta Crystallogr D Biol Crystallogr. 2000 Apr;56(Pt 4):411-20. PMID:10739914<ref>PMID:10739914</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 2cau" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Canavalia ensiformis]] | [[Category: Canavalia ensiformis]] | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: Day | [[Category: Day J]] | ||
[[Category: Ko | [[Category: Ko T-P]] | ||
[[Category: Macpherson | [[Category: Macpherson A]] | ||