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2rst
From Proteopedia
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| - | + | ==NMR structure of the C-terminal domain of EW29== | |
| - | + | <StructureSection load='2rst' size='340' side='right' caption='[[2rst]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''> | |
| - | + | == Structural highlights == | |
| + | <table><tr><td colspan='2'>[[2rst]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Lumbricus_terrestris Lumbricus terrestris]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2RST OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2RST FirstGlance]. <br> | ||
| + | </td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2rst FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2rst OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2rst RCSB], [http://www.ebi.ac.uk/pdbsum/2rst PDBsum]</span></td></tr> | ||
| + | </table> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | The C-terminal domain (Ch; C-half) of the R-type earthworm 29-kDa lectin (EW29), isolated from the earthworm Lumbricus terrestris, has two sugar-binding sites, in subdomains alpha and gamma, and the protein uses the two sugar-binding sites for its function as a single domain-type haemagglutinin. Our previous NMR titration experiments showed that the alpha sugar-binding site is a high-affinity site and the gamma sugar-binding site is a low-affinity site. However, it remains unclear why the alpha sugar-binding site of EW29Ch binds to lactose much more strongly because the crystal structure of lactose-bound EW29Ch showed that the interaction between the alpha sugar-binding site and lactose was almost same as that between the gamma sugar-binding site and lactose. In the present study, we have determined the NMR structure of EW29Ch in the sugar-free state and performed (15)N relaxation experiments for EW29Ch in both the sugar-free state and the lactose-bound states. The conformation of EW29Ch in the sugar-free state was similar to that of EW29Ch in complex with lactose. Conformational changes upon binding of lactose were observed only for the alpha sugar-binding site. By contrast, the (15)N relaxation experiments revealed a conformational exchange at the alpha sugar-binding site in the sugar-free state, which was suppressed in the lactose-bound state. The conformational exchange phenomenon observed for the alpha sugar-binding site was not observed for the gamma sugar-binding site. Differences in the conformational change and the backbone dynamics between subdomains alpha and gamma may be associated with the difference of the sugar-binding modes between the two sugar-binding sites. DATABASE: Structural data for the NMR structure of EW29Ch in the sugar-free state have been deposited in the Protein Data Bank database under accession number 2RST. | ||
| - | + | NMR structure and dynamics of the C-terminal domain of R-type lectin from the earthworm Lumbricus terrestris.,Hemmi H, Kuno A, Hirabayashi J FEBS J. 2013 Jan;280(1):70-82. doi: 10.1111/febs.12050. Epub 2012 Nov 23. PMID:23122331<ref>PMID:23122331</ref> | |
| - | + | ||
| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
| + | |||
| + | ==See Also== | ||
| + | *[[Galactose-binding lectin|Galactose-binding lectin]] | ||
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
[[Category: Lumbricus terrestris]] | [[Category: Lumbricus terrestris]] | ||
| - | [[Category: Hemmi, H | + | [[Category: Hemmi, H]] |
[[Category: R-type lectin]] | [[Category: R-type lectin]] | ||
[[Category: Sugar binding protein]] | [[Category: Sugar binding protein]] | ||
Revision as of 11:42, 18 December 2014
NMR structure of the C-terminal domain of EW29
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