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@article{990466,
author = {Marchetti, Roberta and Malinovská, Lenka and Lameignere, Emilie and Adamová, Lenka and de Castro, Cristina and Cioci, Gianluca and Stanetty, Christian and Kosma, Paul and Molinaro, Antonio and Wimmerová, Michaela and Imberty, Anne and Silipo, Alba},
article_location = {Oxford},
article_number = {10},
doi = {http://dx.doi.org/10.1093/glycob/cws105},
keywords = {bacterial lectin;heptose;lipopolysaccharide;NMR;titration microcalorimetry},
language = {eng},
issn = {0959-6658},
journal = {Glycobiology},
title = {Burkholderia cenocepacia lectin A binding to heptoses from the bacterial lipopolysaccharide},
url = {http://glycob.oxfordjournals.org/content/22/10/1387.abstract},
volume = {22},
year = {2012}
}
TY - JOUR
ID - 990466
AU - Marchetti, Roberta - Malinovská, Lenka - Lameignere, Emilie - Adamová, Lenka - de Castro, Cristina - Cioci, Gianluca - Stanetty, Christian - Kosma, Paul - Molinaro, Antonio - Wimmerová, Michaela - Imberty, Anne - Silipo, Alba
PY - 2012
TI - Burkholderia cenocepacia lectin A binding to heptoses from the bacterial lipopolysaccharide
JF - Glycobiology
VL - 22
IS - 10
SP - 1387-1398
EP - 1387-1398
PB - Oxford University Press
SN - 09596658
KW - bacterial lectin;heptose;lipopolysaccharide;NMR;titration microcalorimetry
UR - http://glycob.oxfordjournals.org/content/22/10/1387.abstract
L2 - http://glycob.oxfordjournals.org/content/22/10/1387.abstract
N2 - Bacteria from the Burkholderia cepacia complex (Bcc) cause highly contagious pneumonia among cystic fibrosis (CF) patients. Among them, Burkholderia cenocepacia is one of the most dangerous in the Bcc and is the most frequent cause of morbidity and mortality in CF patients. Indeed, it is responsible of “cepacia syndrome”, a deadly exacerbation of infection, that is the main cause of poor outcomes in lung transplantation. Burkholderia cenocepacia produces several soluble lectins with specificity for fucosylated and mannosylated glycoconjugates. These lectins are present on the bacterial cell surface and it has been proposed that they bind to lipopolysaccharide epitopes. In this work, we report on the interaction of one B. cenocepacia lectin, BC2L-A, with heptose and other manno configured sugar residues. Saturation transfer difference NMR spectroscopy studies of BC2L-A with different mono- and disaccharides demonstrated the requirement of manno configuration with the hydroxyl or glycol group at C6 for the binding process. The crystal structure of BC2L-A complexed with the methyl-heptoside confirmed the location of the carbohydrate ring in the binding site and elucidated the orientation of the glycol tail, in agreement with NMR data. Titration calorimetry performed on monosaccharides, heptose disaccharides and bacterial heptose-containing oligosaccharides and polysaccharides confirmed that bacterial cell wall contains carbohydrate epitopes that can bind to BC2L-A. Additionally, the specific binding of fluorescent BC2L-A lectin on B. cenocepacia bacterial surface was demonstrated by microscopy.
ER -
MARCHETTI, Roberta, Lenka MALINOVSKÁ, Emilie LAMEIGNERE, Lenka ADAMOVÁ, Cristina DE CASTRO, Gianluca CIOCI, Christian STANETTY, Paul KOSMA, Antonio MOLINARO, Michaela WIMMEROVÁ, Anne IMBERTY and Alba SILIPO. Burkholderia cenocepacia lectin A binding to heptoses from the bacterial lipopolysaccharide. \textit{Glycobiology}. Oxford: Oxford University Press, 2012, vol.~22, No~10, p.~1387-1398. ISSN~0959-6658. Available from: https://dx.doi.org/10.1093/glycob/cws105.
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