1is5
From Proteopedia
(New page: 200px<br /><applet load="1is5" size="450" color="white" frame="true" align="right" spinBox="true" caption="1is5, resolution 2.00Å" /> '''Ligand free Congerin...) |
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| - | [[Image:1is5.jpg|left|200px]]<br /><applet load="1is5" size=" | + | [[Image:1is5.jpg|left|200px]]<br /><applet load="1is5" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="1is5, resolution 2.00Å" /> | caption="1is5, resolution 2.00Å" /> | ||
'''Ligand free Congerin II'''<br /> | '''Ligand free Congerin II'''<br /> | ||
==Overview== | ==Overview== | ||
| - | The crystal structure of congerin II, a galectin family lectin from conger | + | The crystal structure of congerin II, a galectin family lectin from conger eel, was determined at 1.45A resolution. The previously determined structure of its isoform, congerin I, had revealed a fold evolution via strand swap; however, the structure of congerin II described here resembles other prototype galectins. A comparison of the two congerin genes with that of several other galectins suggests acceralated evolution of both congerin genes following gene duplication. The presence of a Mes (2-[N-morpholino]ethanesulfonic acid) molecule near the carbohydrate-binding site in the crystal structure points to the possibility of an additional binding site in congerin II. The binding site consists of a group of residues that had been replaced following gene duplication suggesting that the binding site was built under selective pressure. Congerin II may be a protein specialized for biological defense with an affinity for target carbohydrates on parasites' cell surface. |
==About this Structure== | ==About this Structure== | ||
| - | 1IS5 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Conger_myriaster Conger myriaster]. Full crystallographic information is available from [http:// | + | 1IS5 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Conger_myriaster Conger myriaster]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1IS5 OCA]. |
==Reference== | ==Reference== | ||
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[[Category: beta sandwich]] | [[Category: beta sandwich]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 13:15:02 2008'' |
Revision as of 11:15, 21 February 2008
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Ligand free Congerin II
Overview
The crystal structure of congerin II, a galectin family lectin from conger eel, was determined at 1.45A resolution. The previously determined structure of its isoform, congerin I, had revealed a fold evolution via strand swap; however, the structure of congerin II described here resembles other prototype galectins. A comparison of the two congerin genes with that of several other galectins suggests acceralated evolution of both congerin genes following gene duplication. The presence of a Mes (2-[N-morpholino]ethanesulfonic acid) molecule near the carbohydrate-binding site in the crystal structure points to the possibility of an additional binding site in congerin II. The binding site consists of a group of residues that had been replaced following gene duplication suggesting that the binding site was built under selective pressure. Congerin II may be a protein specialized for biological defense with an affinity for target carbohydrates on parasites' cell surface.
About this Structure
1IS5 is a Single protein structure of sequence from Conger myriaster. Full crystallographic information is available from OCA.
Reference
Crystal structure of a conger eel galectin (congerin II) at 1.45A resolution: implication for the accelerated evolution of a new ligand-binding site following gene duplication., Shirai T, Matsui Y, Shionyu-Mitsuyama C, Yamane T, Kamiya H, Ishii C, Ogawa T, Muramoto K, J Mol Biol. 2002 Aug 30;321(5):879-89. PMID:12206768
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