3FFO

F17b-G lectin domain with bound GlcNAc(beta1-2)man

3FFO の概要

• エントリーDOI: 10.2210/pdb3ffo/pdb
• 関連するPDBエントリー: 1O9Z
• 分子名称: Adhesin, 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-beta-D-mannopyranose, NICKEL (II) ION, ... (6 entities in total)
• 機能のキーワード: bacterial adhesin, lectin, bacterial attachment, pathogenesis, immunoglobulin fold, cell projection, fimbrium, sugar binding protein
• 由来する生物種: Escherichia coli
• 細胞内の位置: Fimbrium : Q47200
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 19653.18

構造登録者

Buts, L.,De Boer, A.,Olsson, J.D.M.,Jonckheere, W.,De Kerpel, M.,De Genst, E.,Guerardel, Y.,Willaert, R.,Wyns, L.,Wuhrer, M.,Oscarson, S.,De Greve, H.,Bouckaert, J. (登録日: 2008-12-04, 公開日: 2009-12-22, 最終更新日: 2024-11-20)

主引用文献

Lonardi, E.,Moonens, K.,Buts, L.,de Boer, A.R.,Olsson, J.D.M.,Weiss, M.S.,Fabre, E.,Guerardel, Y.,Deelder, A.M.,Oscarson, S.,Wuhrer, M.,Bouckaert, J.
Structural Sampling of Glycan Interaction Profiles Reveals Mucosal Receptors for Fimbrial Adhesins of Enterotoxigenic Escherichia coli.
Biology (Basel), 2:894-917, 2013

PubMed Abstract: Fimbriae are long, proteinaceous adhesion organelles expressed on the bacterial envelope, evolutionarily adapted by Escherichia coli strains for the colonization of epithelial linings. Using glycan arrays of the Consortium for Functional Glycomics (CFG), the lectin domains were screened of the fimbrial adhesins F17G and FedF from enterotoxigenic E. coli (ETEC) and of the FimH adhesin from uropathogenic E. coli. This has led to the discovery of a more specific receptor for F17G, GlcNAcb1,3Gal. No significant differences emerged from the glycan binding profiles of the F17G lectin domains from five different E. coli strains. However, strain-dependent amino acid variations, predominantly towards the positively charged arginine, were indicated by sulfate binding in FedF and F17G crystal structures. For FedF, no significant binders could be observed on the CFG glycan array. Hence, a shotgun array was generated from microvilli scrapings of the distal jejunum of a 3-week old piglet about to be weaned. On this array, the blood group A type 1 hexasaccharide emerged as a receptor for the FedF lectin domain and remarkably also for F18-fimbriated E. coli. F17G was found to selectively recognize glycan species with a terminal GlcNAc, typifying intestinal mucins. In conclusion, F17G and FedF recognize long glycan sequences that could only be identified using the shotgun approach. Interestingly, ETEC strains display a large capacity to adapt their fimbrial adhesins to ecological niches via charge-driven interactions, congruent with binding to thick mucosal surfaces displaying an acidic gradient along the intestinal tract.

PubMed: 24833052
DOI: 10.3390/biology2030894

実験手法

X-RAY DIFFRACTION (2.1 Å)