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1o9z

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{{STRUCTURE_1o9z| PDB=1o9z | SCENE= }}
{{STRUCTURE_1o9z| PDB=1o9z | SCENE= }}
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'''F17-AG LECTIN DOMAIN FROM ESCHERICHIA COLI (LIGAND FREE)'''
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===F17-AG LECTIN DOMAIN FROM ESCHERICHIA COLI (LIGAND FREE)===
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==Overview==
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The F17-G adhesin at the tip of flexible F17 fimbriae of enterotoxigenic Escherichia coli mediates binding to N-acetyl-beta-D-glucosamine-presenting receptors on the microvilli of the intestinal epithelium of ruminants. We report the 1.7 A resolution crystal structure of the lectin domain of F17-G, both free and in complex with N-acetylglucosamine. The monosaccharide is bound on the side of the ellipsoid-shaped protein in a conserved site around which all natural variations of F17-G are clustered. A model is proposed for the interaction between F17-fimbriated E. coli and microvilli with enhanced affinity compared with the binding constant we determined for F17-G binding to N-acetylglucosamine (0.85 mM-1). Unexpectedly, the F17-G structure reveals that the lectin domains of the F17-G, PapGII and FimH fimbrial adhesins all share the immunoglobulin-like fold of the structural components (pilins) of their fimbriae, despite lack of any sequence identity. Fold comparisons with pilin and chaperone structures of the chaperone/usher pathway highlight the central role of the C-terminal beta-strand G of the immunoglobulin-like fold and provides new insights into pilus assembly, function and adhesion.
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(as it appears on PubMed at http://www.pubmed.gov), where 12864853 is the PubMed ID number.
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{{ABSTRACT_PUBMED_12864853}}
==About this Structure==
==About this Structure==
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[[Category: Lectin]]
[[Category: Lectin]]
[[Category: Pathogenesis]]
[[Category: Pathogenesis]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 03:34:31 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 16:34:04 2008''

Revision as of 13:34, 29 July 2008

Image:1o9z.png

Template:STRUCTURE 1o9z

F17-AG LECTIN DOMAIN FROM ESCHERICHIA COLI (LIGAND FREE)

Template:ABSTRACT PUBMED 12864853

About this Structure

1O9Z is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.

Reference

The fimbrial adhesin F17-G of enterotoxigenic Escherichia coli has an immunoglobulin-like lectin domain that binds N-acetylglucosamine., Buts L, Bouckaert J, De Genst E, Loris R, Oscarson S, Lahmann M, Messens J, Brosens E, Wyns L, De Greve H, Mol Microbiol. 2003 Aug;49(3):705-15. PMID:12864853

Page seeded by OCA on Tue Jul 29 16:34:04 2008

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