1c3k: Difference between revisions

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== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[1c3k]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Helianthus_tuberosus Helianthus tuberosus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1C3K OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1C3K FirstGlance]. <br>
<table><tr><td colspan='2'>[[1c3k]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Helianthus_tuberosus Helianthus tuberosus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1C3K OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1C3K FirstGlance]. <br>
</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=1c3k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1c3k OCA], [https://pdbe.org/1c3k PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1c3k RCSB], [https://www.ebi.ac.uk/pdbsum/1c3k PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1c3k ProSAT]</span></td></tr>
</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&#8491;</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=1c3k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1c3k OCA], [https://pdbe.org/1c3k PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1c3k RCSB], [https://www.ebi.ac.uk/pdbsum/1c3k PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1c3k ProSAT]</span></td></tr>
</table>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q9ZQY5_HELTU Q9ZQY5_HELTU]
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
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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=1c3k ConSurf].
</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=1c3k ConSurf].
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== Publication Abstract from PubMed ==
BACKGROUND: Heltuba, a tuber lectin from the Jerusalem artichoke Helianthus tuberosus, belongs to the mannose-binding subgroup of the family of jacalin-related plant lectins. Heltuba is highly specific for the disaccharides Man alpha 1-3Man or Man alpha 1-2Man, two carbohydrates that are particularly abundant in the glycoconjugates exposed on the surface of viruses, bacteria and fungi, and on the epithelial cells along the gastrointestinal tract of lower animals. Heltuba is therefore a good candidate as a defense protein against plant pathogens or predators. RESULTS: The 2.0 A resolution structure of Heltuba exhibits a threefold symmetric beta-prism fold made up of three four-stranded beta sheets. The crystal structures of Heltuba in complex with Man alpha 1-3Man and Man alpha 1-2Man, solved at 2.35 A and 2.45 A resolution respectively, reveal the carbohydrate-binding site and the residues required for the specificity towards alpha 1-3 or alpha 1-2 mannose linkages. In addition, the crystal packing reveals a remarkable, donut-shaped, octahedral assembly of subunits with the mannose moieties at the periphery, suggesting possible cross-linking interactions with branched oligomannosides. CONCLUSIONS: The structure of Heltuba, which is the prototype for an extended family of mannose-binding agglutinins, shares the carbohydrate-binding site and beta-prism topology of its galactose-binding counterparts jacalin and Maclura pomifera lectin. However, the beta-prism elements recruited to form the octameric interface of Heltuba, and the strategy used to forge the mannose-binding site, are unique and markedly dissimilar to those described for jacalin. The present structure highlights a hitherto unrecognized adaptability of the beta-prism building block in the evolution of plant proteins.
Helianthus tuberosus lectin reveals a widespread scaffold for mannose-binding lectins.,Bourne Y, Zamboni V, Barre A, Peumans WJ, Van Damme EJ, Rouge P Structure. 1999 Dec 15;7(12):1473-82. PMID:10647178<ref>PMID:10647178</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 1c3k" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
*[[Agglutinin 3D structures|Agglutinin 3D structures]]
*[[Agglutinin 3D structures|Agglutinin 3D structures]]
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Helianthus tuberosus]]
[[Category: Helianthus tuberosus]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Barre, A]]
[[Category: Barre A]]
[[Category: Bourne, Y]]
[[Category: Bourne Y]]
[[Category: Damme, E J.M van]]
[[Category: Peumans WJ]]
[[Category: Peumans, W J]]
[[Category: Rouge P]]
[[Category: Rouge, P]]
[[Category: Zamboni V]]
[[Category: Zamboni, V]]
[[Category: Van Damme EJM]]
[[Category: Agglutinin]]
[[Category: Beta prism]]
[[Category: Jacalin-related]]
[[Category: Mannose]]
[[Category: Sugar binding protein]]

Latest revision as of 09:40, 7 February 2024

CRYSTAL STRUCTURE OF HELIANTHUS TUBEROSUS LECTINCRYSTAL STRUCTURE OF HELIANTHUS TUBEROSUS LECTIN

Structural highlights

1c3k is a 1 chain structure with sequence from Helianthus tuberosus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2Å
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

Q9ZQY5_HELTU

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

See Also

1c3k, resolution 2.00Å

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