1xi0

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{{STRUCTURE_1xi0| PDB=1xi0 | SCENE= }}
{{STRUCTURE_1xi0| PDB=1xi0 | SCENE= }}
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'''X-ray crystal structure of wild-type Xerocomus chrysenteron lectin XCL'''
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===X-ray crystal structure of wild-type Xerocomus chrysenteron lectin XCL===
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==Overview==
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A newly defined family of fungal lectins displays no significant sequence similarity to any protein in the databases. These proteins, made of about 140 amino acid residues, have sequence identities ranging from 38% to 65% and share binding specificity to N-acetyl galactosamine. One member of this family, the lectin XCL from Xerocomus chrysenteron, induces drastic changes in the actin cytoskeleton after sugar binding at the cell surface and internalization, and has potent insecticidal activity. The crystal structure of XCL to 1.4 A resolution reveals the architecture of this new lectin family. The fold of the protein is not related to any of the several lectin folds documented so far. Unexpectedly, the structure similarity is significant with actinoporins, a family of pore-forming toxins. The specific structural features and sequence signatures in each protein family suggest a potential sugar binding site in XCL and a possible evolutionary relationship between these proteins. Finally, the tetrameric assembly of XCL reveals a complex network of protomer-protomer interfaces and generates a large, hydrated cavity of 1000 A3, which may become accessible to larger solutes after a small conformational change of the protein.
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(as it appears on PubMed at http://www.pubmed.gov), where 15561152 is the PubMed ID number.
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{{ABSTRACT_PUBMED_15561152}}
==About this Structure==
==About this Structure==
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[[Category: Beta sandwich]]
[[Category: Beta sandwich]]
[[Category: Greek key motif]]
[[Category: Greek key motif]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 15:03:25 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 00:23:36 2008''

Revision as of 21:23, 27 July 2008

Image:1xi0.png

Template:STRUCTURE 1xi0

X-ray crystal structure of wild-type Xerocomus chrysenteron lectin XCL

Template:ABSTRACT PUBMED 15561152

About this Structure

1XI0 is a Single protein structure of sequence from Xerocomus chrysenteron. Full crystallographic information is available from OCA.

Reference

A new lectin family with structure similarity to actinoporins revealed by the crystal structure of Xerocomus chrysenteron lectin XCL., Birck C, Damian L, Marty-Detraves C, Lougarre A, Schulze-Briese C, Koehl P, Fournier D, Paquereau L, Samama JP, J Mol Biol. 2004 Dec 10;344(5):1409-20. PMID:15561152

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