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- 4Electrospray ionization mass spectrometry
- 4Human milk oligosaccharide
- 4Library screening
- 4Toxin
- 2Affinity
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Structural basis for antibody recognition in the receptor-binding domains of toxins A and B from Clostridium difficile
Download2014
Ng, Kenneth K. S., Tanha, Jamshid, Kitova, Elena N., Eugenio, Luiz, Murase, Tomohiko, Klassen, John S., Hussack, Greg, Schorr, Melissa
Clostridium difficile infection is a serious and highly prevalent nosocomial disease in which the two large, Rho-glucosylating toxins TcdA and TcdB are the main virulence factors. We report for the first time crystal structures revealing how neutralizing and non-neutralizing single-domain...
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Screening oligosaccharide libraries against lectins using the proxy protein electrospray ionization mass spectrometry assay
Download2016
Kitova, Elena N., Klassen, John S., Fan, Xuxin, Privé, Gilbert G., Cairo, Christopher W., Xiong, Zi Jian, Ng, Kenneth K. S., Zou, Chunxia, Eugenio, Luiz, Li, Jun
An electrospray ionization mass spectrometry (ESI-MS) assay for screening carbohydrate libraries against lectins is described. The assay is based on the proxy protein ESI-MS method, which combines direct ESI-MS protein–ligand binding measurements and competitive protein binding, to simultaneously...
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Screening oligosaccharide libraries against lectins using the proxy protein electrospray ionization mass spectrometry assay
Download2016
Privé, Gilbert G., Ng, Kenneth K. S., Xiong, Zi Jian, Klassen, John S., Kitova, Elena N., Fan, Xuxin, Li, Jun, Zou, Chunxia, Eugenio, Luiz, Cairo, Christopher W.
An electrospray ionization mass spectrometry (ESI-MS) assay for screening carbohydrate libraries against lectins is described. The assay is based on the proxy protein ESI-MS method, which combines direct ESI-MS protein–ligand binding measurements and competitive protein binding, to simultaneously...
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Screening carbohydrate libraries for protein interactions using the direct ESI-MS assay: Applications to libraries of unknown concentration
Download2014
El-Hawiet, Amr, Klassen, John S., Kitova, Elena N.
A semiquantitative electrospray ionization mass spectrometry (ESI-MS) binding assay suitable for analyzing mixtures of oligosaccharides, at unknown concentrations, for interactions with target proteins is described. The assay relies on the differences in the ratio of the relative abundances of...
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Screening carbohydrate libraries for protein interactions using the direct ESI-MS assay: Applications to libraries of unknown concentration
Download2014
El-Hawiet, Amr, Klassen, John S., Kitova, Elena N.
A semiquantitative electrospray ionization mass spectrometry (ESI-MS) binding assay suitable for analyzing mixtures of oligosaccharides, at unknown concentrations, for interactions with target proteins is described. The assay relies on the differences in the ratio of the relative abundances of...
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Reliable determinations of protein-ligand interactions by direct ESI-MS measurements: Are we there yet?
Download2012
El-Hawiet, Amr, Klassen, John S., Kitova, Elena N., Schnier, Paul D.
The association-dissociation of noncovalent interactions between protein and ligands, such as other proteins, carbohydrates, lipids, DNA, or small molecules, are critical events in many biological processes. The discovery and characterization of these interactions is essential to a complete...
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Reliable determinations of protein-ligand interactions by direct ESI-MS measurements: Are we there yet?
Download2012
Klassen, John S., Kitova, Elena N., Schnier, Paul D., El-Hawiet, Amr
The association-dissociation of noncovalent interactions between protein and ligands, such as other proteins, carbohydrates, lipids, DNA, or small molecules, are critical events in many biological processes. The discovery and characterization of these interactions is essential to a complete...
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2015
El-Hawiet, Amr, N. Kitova, Elena N., Klassen, John S.
The affinities of the most abundant oligosaccharides found in human milk for four bacterial exotoxins (from Vibrio cholerae and pathogenic Escherichia coli) were quantified for the first time. Association constants (Ka) for a library of 20 human milk oligosaccharides (HMOs) binding to Shiga toxin...
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2015
El-Hawiet, Amr, Klassen, John S., N. Kitova, Elena N.
The affinities of the most abundant oligosaccharides found in human milk for four bacterial exotoxins (from Vibrio cholerae and pathogenic Escherichia coli) were quantified for the first time. Association constants (Ka) for a library of 20 human milk oligosaccharides (HMOs) binding to Shiga toxin...
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Quantifying labile protein-ligand interactions using electrospray ionization mass spectrometry
Download2010
El-Hawiet, Amr, Klassen, John S., Kitova, Elena N., Liu, Lan
A new electrospray ionization mass spectrometry (ES-MS) approach for quantifying protein—ligand complexes that are prone to in-source (gas-phase) dissociation is described. The method, referred to here as the reference ligand ES-MS method, is based on the direct ES-MS assay and competitive ligand...